Agilent Technologies Welding System 6030A User Manual
SERVICE MANUAL  
AUTORANGING  
SYSTEM DC POWER SUPPLY  
AGILENT MODELS 6030A, 6031A,  
6032A and 6035A  
FOR INSTRUMENTS WITH SERIAL NUMBERS  
Agilent Model 6030A; Serials US38320301 and above  
Agilent Model 6031A; Serials US38310376 and above  
Agilent Model 6032A; Serials US38321026 and above  
Agilent Model 6035A; Serials US38320281 and above  
For instruments with higher serial numbers, a change page may be included.  
5ꢀ  
Agilent Part No. 5959-3344  
Microfiche Part No. 5959-3345  
Printed in USA  
September, 2000  
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SAFETY SUMMARY  
The following general safety precautions must be observed during all phases of operation, service and repair of this  
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety  
standards of design, manufacture, and intended use of the instrument. Agilent Technologies Inc. assumes no liability for the  
customer's failure to comply with these requirements.  
BEFORE APPLYING POWER.  
Verify that the product is set to match the available line voltage and the correct fuse is installed.  
GROUND THE INSTRUMENT.  
This product is a Safety Class 1 instrument (provided with a protective earth terminal). To minimize shock hazard, the instrument chassis  
and cabinet must be connected to an electrical ground. The instrument must be connected to the ac power supply mains through a three-  
conductor power cable, with the third wire firmly connected to an electrical ground (safety ground) at the power outlet. For instruments  
designed to be hard wired to the ac power lines (supply mains), connect the protective earth terminal to a protective conductor before any  
other connection is made. Any interruption of the protective (grounding) conductor or disconnection of the protective earth terminal will  
cause a potential shock hazard that could result in personal injury. If the instrument is to be energized via an external autotransformer for  
voltage reduction, be certain that the autotransformer common terminal is connected to the neutral (earth pole) of the ac power lines  
(supply mains).  
INPUT POWER MUST BE SWITCH CONNECTED.  
For instruments without a built-in line switch, the input power lines must contain a switch or another adequate means for disconnecting  
the instrument from the ac power lines (supply mains).  
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE.  
Do not operate the instrument in the presence of flammable gases or fumes.  
KEEP AWAY FROM LIVE CIRCUITS.  
Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be made by qualified  
service personnel. Do not replace components with power cable connected. Under certain conditions, dangerous voltages may exist even  
with the power cable removed. To avoid injuries, always disconnect power, discharge circuits and remove external voltage sources before  
touching components.  
DO NOT SERVICE OR ADJUST ALONE.  
Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.  
DO NOT EXCEED INPUT RATINGS.  
This instrument may be equipped with a line filter to reduce electromagnetic interference and must be connected to a properly grounded  
receptacle to minimize electric shock hazard. Operation at the line voltage or frequencies in excess of those stated on the data plate may  
cause leakage currents in excess of 5.0mA peak.  
SAFETY SYMBOLS.  
Instruction manual symbol: the product will be marked with this symbol when it is necessary for the user to refer to the  
instruction manual (refer to Table of Contents) .  
Indicates hazardous voltages.  
Indicate earth (ground) terminal.  
The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not correctly  
performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING sign until the  
indicated conditions are fully understood and met.  
The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not correctly  
performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed beyond  
a CAUTION sign until the indicated conditions are fully understood and met.  
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT.  
Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the  
instrument. Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features  
are maintained.  
Instruments which appear damaged or defective should be made inoperative and secured against unintended operation until they can be  
repaired by qualified service personnel.  
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Safety Symbol Definitions  
Symbol  
Description  
Direct current  
Symbol  
Description  
Terminal for Line conductor on permanently  
installed equipment  
Alternating current  
Caution, risk of electric shock  
Both direct and alternating current  
Three-phase alternating current  
Earth (ground) terminal  
Caution, hot surface  
Caution (refer to accompanying documents)  
In position of a bi-stable push control  
Protective earth (ground) terminal  
(Intended for connection to external  
protective conductor.)  
Out position of a bi-stable push control  
On (supply)  
Frame or chassis terminal  
Terminal for Neutral conductor on  
permanently installed equipment  
Off (supply)  
Terminal is at earth potential  
Standby (supply)  
(Used for measurement and control  
circuits designed to be operated with  
one terminal at earth potential.)  
Units with this symbol are not completely  
disconnected from ac mains when this switch is  
off. To completely disconnect the unit from ac  
mains, either disconnect the power cord or have  
a qualified electrician install an external switch.  
Printing History  
The edition and current revision of this manual are indicated below. Reprints of this manual containing minor corrections  
and updates may have the same printing date. Revised editions are identified by a new printing date. A revised edition  
incorporates all new or corrected material since the previous printing date. Changes to the manual occurring between  
revisions are covered by change sheets shipped with the manual. Also, if the serial number prefix of your power supply is  
higher than those listed on the title page of this manual, then it may or may not include a change sheet. That is because even  
though the higher serial number prefix indicates a design change, the change may not affect the content of the manual.  
Edition 1  
Edition2  
June, 1991  
September, 2000  
© Copyright 1991, 2000 Agilent Technologies, Inc.  
This document contains proprietary information protected by copyright. All rights are reserved. No part of this document  
may be photocopied, reproduced, or translated into another language without the prior consent of Agilent Technologies, Inc.  
The information contained in this document is subject to change without notice.  
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TABLE OF CONTENTS  
Introduction ............................................................................................................................................................................ 9  
Scope .................................................................................................................................................................................... 9  
Calibration and Verification ............................................................................................................................................. 9  
Troubleshooting................................................................................................................................................................ 9  
Principles of Operation..................................................................................................................................................... 9  
Replaceable Parts.............................................................................................................................................................. 9  
Circuit Diagrams............................................................................................................................................................... 9  
Safety Considerations ........................................................................................................................................................... 9  
Manual Revisions................................................................................................................................................................ 10  
Firmware Revisions ............................................................................................................................................................ 10  
Calibration and Verification................................................................................................................................................ 11  
Introduction......................................................................................................................................................................... 11  
Test Equipment Required ................................................................................................................................................... 11  
Operation Verification Tests............................................................................................................................................... 11  
Calibration Procedure ......................................................................................................................................................... 11  
Initial Setup..................................................................................................................................................................... 14  
Voltage Monitor Zero Calibration .................................................................................................................................. 15  
Common Mode Calibration ............................................................................................................................................ 15  
Remote Readback Zero Calibration................................................................................................................................ 15  
Constant Voltage Full Scale Calibration......................................................................................................................... 17  
Voltage Monitor and Remote Readback Full Scale Calibration ..................................................................................... 17  
Constant Voltage Zero Calibration ................................................................................................................................. 18  
Current Monitor Zero Calibration................................................................................................................................... 18  
Constant Current Zero Calibration.................................................................................................................................. 18  
Current Monitor Full Scale Calibration .......................................................................................................................... 19  
Constant Current Full Scale Calibration ......................................................................................................................... 19  
Power Limit Calibration.................................................................................................................................................. 20  
Resistance Programming Full Scale Calibration............................................................................................................. 21  
Performance Tests............................................................................................................................................................... 21  
Measurement Techniques ............................................................................................................................................... 21  
Constant Voltage (CV) Tests.......................................................................................................................................... 22  
Constant Current (CC) Tests........................................................................................................................................... 28  
Initialization Procedure....................................................................................................................................................... 31  
Troubleshooting.................................................................................................................................................................... 33  
Introduction......................................................................................................................................................................... 33  
Initial Troubleshooting Procedures..................................................................................................................................... 33  
Electrostatic Protection....................................................................................................................................................... 34  
Repair and Replacement ..................................................................................................................................................... 34  
A2 Control Board Removal ............................................................................................................................................ 35  
A4 FET Board Removal ................................................................................................................................................. 35  
A5 Diode Board Removal............................................................................................................................................... 36  
A8 GPIB Board Removal ............................................................................................................................................... 36  
A3 Front-Panel Board Removal...................................................................................................................................... 36  
A1 Main Board Removal................................................................................................................................................ 36  
Overall Troubleshooting Procedure.................................................................................................................................... 37  
GPIB Section Troubleshooting........................................................................................................................................... 39  
Primary Interface Troubleshooting ..................................................................................................................................... 40  
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Secondary Interface Troubleshooting ................................................................................................................................. 41  
Voltage and Current DAC............................................................................................................................................... 41  
Readback DAC Circuits.................................................................................................................................................. 43  
Readback Multiplexer (U20): ......................................................................................................................................... 43  
Signature Analysis .............................................................................................................................................................. 45  
Primary SA ..................................................................................................................................................................... 45  
Front Panel SA................................................................................................................................................................ 45  
Secondary SA ................................................................................................................................................................. 46  
Power Section Troubleshooting.......................................................................................................................................... 51  
Main Troubleshooting Setup........................................................................................................................................... 52  
Troubleshooting No-Output Failures.............................................................................................................................. 53  
Power Section Blocks ..................................................................................................................................................... 54  
Troubleshooting AC-Turn-On Circuits........................................................................................................................... 57  
Troubleshooting DC-To-DC Converter.......................................................................................................................... 57  
Troubleshooting Bias Supplies ....................................................................................................................................... 58  
Troubleshooting Down Programmer............................................................................................................................... 61  
Troubleshooting CV Circuit ........................................................................................................................................... 61  
Troubleshooting CC Circuit............................................................................................................................................ 62  
Troubleshooting OVP Circuit......................................................................................................................................... 62  
Troubleshooting PWM & Clock..................................................................................................................................... 63  
Principles of Operation ........................................................................................................................................................ 65  
Introduction......................................................................................................................................................................... 65  
GPIB Board ........................................................................................................................................................................ 65  
Primary Microprocessor ................................................................................................................................................. 65  
Address Switches........................................................................................................................................................... 65  
EEPROM........................................................................................................................................................................ 67  
Isolation .......................................................................................................................................................................... 67  
Secondary Microprocessor ............................................................................................................................................. 67  
Digital-to-Analog Converters.......................................................................................................................................... 67  
Analog Multiplexer......................................................................................................................................................... 67  
Status Inputs.................................................................................................................................................................... 67  
Front Panel Board............................................................................................................................................................... 68  
Address Latches and Decoders ....................................................................................................................................... 68  
Volts and Amps Output Ports and Displays.................................................................................................................... 68  
RPG and Latches ............................................................................................................................................................ 68  
Front-Panel Switches and Input Port............................................................................................................................... 68  
Mode Indicators.............................................................................................................................................................. 70  
OVP Adjust Control........................................................................................................................................................ 70  
Power Clear .................................................................................................................................................................... 70  
Power Mesh and Control Board.......................................................................................................................................... 70  
Overview......................................................................................................................................................................... 70  
Power Mesh .................................................................................................................................................................... 71  
Control Board ................................................................................................................................................................. 73  
Replaceable Parts.................................................................................................................................................................. 79  
Introduction......................................................................................................................................................................... 79  
Ordering Information.......................................................................................................................................................... 80  
Component Location and Circuit Diagrams .................................................................................................................... 101  
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l00 Vac Input Power Option 100 ....................................................................................................................................... 119  
General Information.......................................................................................................................................................... 119  
Description.................................................................................................................................................................... 119  
Scope of Appendix A.................................................................................................................................................... 119  
Suggestions for Using Appendix A............................................................................................................................... 119  
Chapter 1 Manual Changes........................................................................................................................................... 119  
Chapter 2 Manual Changes........................................................................................................................................... 119  
Chapter 3 Manual Changes:.......................................................................................................................................... 123  
Chapter 4 Manual Changes:.......................................................................................................................................... 123  
Chapter 5 and 6 Manual Changes ................................................................................................................................. 123  
Blank Front Panel Option 001........................................................................................................................................... 125  
Introduction....................................................................................................................................................................... 125  
Troubleshooting............................................................................................................................................................ 125  
Chapter 2 Manual Changes:.......................................................................................................................................... 125  
Chapter 3 Manual Changes:.......................................................................................................................................... 126  
Chapter 5 and 6 Manual Changes: ................................................................................................................................ 126  
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1
Introduction  
Scope  
This manual contains information for troubleshooting the Agilent 6030A, 6031A, 6032A, or 6035A 1000 W Autoranging  
Power Supply to the component level. Wherever applicable, the service instructions given in this manual refer to pertinent  
information provided in the Operation Manual (P/N 5959-3301). Both manuals cover Agilent Models  
6030A/31A/32A/35A; differences between models are described as required.  
The following information is contained in this manual.  
Calibration and Verification  
Contains calibration procedures for Agilent Models 6030A/31A/32A/35A. Also contains verification procedures that check  
the operation of the supplies to ensure they meet the specifications of Chapter 1 in the Operating Manual.  
Troubleshooting  
Contains troubleshooting procedures to isolate a malfunction to a defective component on the main circuit board or to a  
defective assembly (front panel, power transformer, or cable assembly). Board and assembly level removal and replacement  
procedures are also given in this section.  
Principles of Operation  
Provides block diagram level descriptions of the supply's circuits. The primary interface, secondary interface, and the power  
mesh and control circuits are described. These descriptions are intended as an aid in troubleshooting.  
Replaceable Parts  
Provides a listing of replaceable parts for all electronic components and mechanical assemblies for Agilent Models  
6030A/31A/32A/35A.  
Circuit Diagrams  
Contains functional schematics and component location diagrams for all Agilent 6030A/31A/32A/35A circuits. The names  
that appear on the functional schematics also appear on the block diagrams in Chapter 2. Thus, the descriptions in Chapter 2  
can be correlated with both the block diagrams and the schematics.  
Safety Considerations  
This product is a Safety Class 1 instrument, which means that it is provided with a protective earth terminal. Refer to the  
Safety Summary page at the beginning of this manual for a summary of general safety information. Safety information for  
specific procedures is located at appropriate places in the manual.  
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Manual Revisions  
Agilent Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first two  
letters indicate the country of manufacture. The next four digits are a code that identify either the date of manufacture or of a  
significant design change. The last four digits are a sequential number assigned to each instrument.  
Item  
US  
Description  
The first two letters indicates the country of manufacture, where US = USA.  
This is a code that identifies either the date of manufacture or the date of a significant design change.  
The last four digits are a unique number assigned to each power supply.  
3648  
0101  
If the serial number prefix on your unit differs from that shown on the title page of this manual, a yellow Manual Change  
sheet may be supplied with the manual. It defines the differences between your unit and the unit described in this manual.  
The yellow change sheet may also contain information for correcting errors in the manual.  
Note that because not all changes to the product require changes to the manual, there may be no update information required  
for your version of the supply.  
Older serial number formats used with these instruments had a two-part serial number, i.e. 2701A-00101. This manual also  
applies to instruments with these older serial number formats. Refer to Appendix G for backdating information.  
Firmware Revisions  
The primary and secondary interface microcomputer chips inside of your supply are identified with labels that specify the  
revision of the supply's firmware. This manual applies to firmware revisions A.00.00, A.00.01, and A.00.02.  
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2
Calibration and Verification  
Introduction  
This section provides test and calibration procedures. The operation-verification tests comprise a short procedure to verify  
that the unit is performing properly, without testing all specified parameters. After troubleshooting and repair of a defective  
power supply you can usually verify proper operation with the turn-on checkout procedure in the Operating Manual. Repairs  
to the A1 main board, the A2 control board and the A8 GPIB board can involve circuits which, although functional, may  
prevent the unit from performing within specified limits. So, after A1, A2 or A8 board repair, decide if recalibration and  
operation verification tests are needed according to the faults you discover. Use the calibration procedure both to check  
repairs and for regular maintenance.  
When verifying the performance of this instrument as described in this chapter, check only those specifications for which a  
performance test procedure is included.  
Test Equipment Required  
Table 2-1 lists the equipment required to perform the tests of this section. You can separately identify the equipment for  
performance tests, calibration and troubleshooting using the USE column of the table.  
Operation Verification Tests  
To assure that the unit is performing properly, without testing all specified parameters, first perform the turn-on checkout  
procedure in the Operating Manual. Then perform the following performance tests, in this section.  
Voltage Programming And Readback Accuracy  
Current Programming And Readback Accuracy  
CV Load Effect  
CC Load Effect  
Calibration Procedure  
Calibrate the unit twice per year and when required during repair. The following calibration procedures should be  
performed in the sequence given.  
Note:  
Some of the calibration procedures for this instrument can be performed independently, and some  
procedures must be performed together and/or in a prescribed order. If a procedure contains no references  
to other procedures, you may assume that it can be performed independently.  
To return a serviced unit to specifications as quickly as possible with minimal calibration, the technician  
need only perform calibration procedures that affect the repaired circuit. Table 2-2 lists various power  
supply circuits with calibration procedures that should be performed after those circuits are serviced.  
If the GPIB board (A8) has been replaced, you must first initialize the board before you can calibrate the  
unit. Refer to Page 31.  
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Table 2-1. Test Equipment Required  
TYPE  
Oscilloscope  
REQUIRED CHARACTERISTICS  
Sensitivity: 1 mV  
USE  
P,T  
RECOMMENDED MODEL  
Agilent 54504A  
Bandwidth: 20MHz & 100MHz  
Input: differential, 50 Ω & 10MΩ  
True rms, 10MHz bandwidth  
Sensitivity: 1 mV Accuracy: 5%  
4.5 to 5.5Vdc @ 35mA  
Resolution: 100nV  
RMS Voltmeter  
P
Agilent 3400B  
Logic Pulser  
Multimeter  
T
P,C,T  
Agilent 546A  
Agilent 3458A  
Accuracy: 0.0035%, 6½ digit  
Signature Analyzer  
GPIB Controller  
Current Probe  
--  
T
C,T,P  
P
Agilent 5004A  
HP Series, 200/300  
Tek P6303 Probe  
Full GPIB capabilities  
No saturation at 100A  
Bandwidth: 20Hz to 15MHz  
AM503 Amp  
TM500 Power Module  
6050A & 60503A (4)  
6050A & 60503A (4)  
6050A & 60504A (2)  
6050A & 60504A (2)  
6050A & 60504A (2)  
6050A & 60504A (2)  
Power Resistor 250Ω 1% 1KW  
6050A & 60503A (4)  
Guildline 9230/15  
Electronic Load  
6030A 200 V/5 A  
60 V/17A  
6031A 20 V/50 A  
7 V/120 A  
6032A 60 V/17.5 A  
20 V/50 A  
6035A 500 V/2 A  
200 V/5 A  
P,C  
Current Shunt  
P,C  
P,C  
0.1Ω/0.04%/15A/25W  
Guildline 9230/100  
Guildline 9230/300  
0.01Ω/0.04%/100A/100W  
0.001Ω/0.04%/300A/100W  
6030A 3.5Ω/40Ω 1% 1000 W (min.)  
6031A 0.069Ω/0.04Ω 1% 1000W (min.)  
6032A 0.4Ω/3.5Ω 1% 1000W (min.)  
6035A 40Ω/250Ω 1% 1000W (min.)  
Value: 100Ω, 5%, 1W  
Power Resistors*  
Calibration and Test  
Resistors  
C,T  
1Ω, 5%, ½W  
1KΩ, 5%, ¼W  
2KΩ, 0.01%, ¼W  
Value: 50Ω 5%, noninductive  
Terminating  
Resistors (2)  
P
Blocking  
P
Value: 0.01µF, 100Vdc  
Capacitors (2)  
Variable Voltage  
Transformer  
Adjustable from -13% to +6% of input  
voltage range, 4KVA minimum  
P,C  
(autotransformer)  
Isolation Transformer  
Common-mode  
Toroidal Core  
4KVA minimum  
≥3.7µH/turn2  
≅23mm I.D.  
T
P
Ferrox-Cube  
500T600-3C8,  
Agilent 9170-0061  
Agilent 6024A  
DC Power Supply  
Voltage range: 0-60Vdc  
Current range: 0-3Adc  
C,T  
P = performance testing C = calibration adjustments  
* Not required if using electronic load.  
T = troubleshooting  
** Less accurate, and less expensive, current-monitor resistors can be used, but the accuracy to which current programming  
and readback can be checked must be reduced accordingly.  
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Table 2-2. Guide to Recalibration After Repair  
Printed Circuit  
Board  
Block Name  
Ref.  
Desig.  
Perform These Procedures  
A1 Main Board  
R3  
Current Monitor Full Scale Calibration  
Constant Current Full Scale Calibration  
A1 Main Board  
A5 Diode Board  
T1, T2  
CR4  
All  
Power Limit Calibration  
Power Limit Calibration  
A2 Control Board Constant Voltage Circuit  
(All Except Current Source)  
Voltage Monitor Zero Calibration  
Common Mode Calibration  
Remote Readback Zero Calibration  
Constant Voltage Full Scale Calibration  
Voltage Monitor and Remote Readback Full  
Scale Calibration  
Constant Voltage Zero Calibration  
A2 Control Board Constant Voltage Circuit  
(Current Source)  
All  
All  
Resistance Programming Full Scale Calibration  
A2 Control Board Constant Current Circuit  
Current Monitor Zero Calibration  
Constant Current Zero Calibration  
Current Monitor Full Scale Calibration  
Constant Current Full Scale Calibration  
A2 Control Board Power Limit Comparator  
All  
All  
Power Limit Calibration  
All Calibration procedures  
A2 Control Board Bias Power Supplies  
( + & -15V Supplies)  
A8 GPIB Board  
Voltage Monitor Buffer  
All  
Voltage Monitor Zero Calibration  
Remote Readback Zero Calibration  
Constant Voltage Full Scale Calibration  
Voltage Monitor and Remote Readback Full  
Scale Calibration  
Constant Voltage Zero Calibration  
A8 GPIB Board  
A8 GPIB Board  
Analog Multiplexer  
Readback DAC  
All  
All  
Remote Readback Zero Calibration  
Constant Voltage Full Scale Calibration  
Voltage Monitor and Remote Readback Full  
Scale Calibration  
Constant Voltage Zero Calibration  
Remote Readback Zero Calibration  
Constant Voltage Full Scale Calibration  
Voltage Monitor and Remote Readback Full  
Scale Calibration  
Constant Voltage Zero Calibration  
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Table 2-2. Guide to Recalibration After Repair (continued)  
Printed Circuit  
Board  
Block Name  
Ref.  
Desig.  
Perform These Procedures  
A8 GPIB Board  
Voltage DAC  
All  
Remote Readback Zero Calibration  
Constant Voltage Full Scale Calibration  
Voltage Monitor and Remote Readback Full  
Scale Calibration  
Constant Voltage Zero Calibration  
A8 GPIB Board  
A8 GPIB Board  
Current DAC  
All  
U5  
Constant Current Zero Calibration  
Constant Current Full Scale Calibration  
Remote Readback Zero Calibration  
Constant Voltage Full Scale Calibration  
Voltage Monitor and Remote Readback Full  
Scale Calibration  
Constant Voltage Zero Calibration  
Constant Current Full Scale Calibration  
Initial Setup  
a. Unplug the line cable.  
b. Remove the top cover by removing the two top-rear screws. Slide the cover to the rear, and pull up.  
c. Plug a control board test connector onto the A2J7 card edge fingers.  
d. Turn OVERVOLTAGE ADJUST control A3R72 fully clockwise.  
e. Disconnect all loads from output terminals.  
f. Connect power supply for local sensing, and ensure that MODE switches are set as shown below.  
g. Connect a GPIB controller to the power supply.  
h. Reconnect line cable and turn on ac power.  
i. Allow unit to warm up for 30 minutes with the internal cover on. The cover should remain in place during all  
calibrations.  
j. When attaching the DVM, the minus lead of the DVM should be connected to the first node listed, and the plus lead  
should be connected to the second node listed.  
k. At the beginning of each calibration procedure, the power supply should be in its power-on state (turn ac power off and  
back on), with no external circuitry connected except as instructed.  
l. The POWER LIMIT adjustment (A2R25) must be adjusted at least coarsely before many of the calibration procedures  
can be performed. If you have no reason to suspect that the Power Limit circuit is out of adjustment, do not change its  
setting. Otherwise, center A2R25 before you begin to calibrate the power supply.  
m. Turn off ac power when making or removing connections to the power supply.  
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Maintenance described herein is performed with power supplied to the instrument, and protective covers  
removed. Such maintenance should be performed only by service trained personnel who are aware of the  
hazards involved (for example, fire and electrical shock). Where maintenance can be performed without  
power applied, the power should be removed.  
Voltage Monitor Zero Calibration  
a. Send string "VSET 0; ISET 0; OUT OFF".  
b. Short power supply output terminals.  
c. Attach the DVM from M on the rear panel through a 1kΩ resistor to A2J7 pin 3 (V-MON buffered).  
d. Adjust A2R22 (V-MON ZERO) to 0V 20µV. ( 40µV 6035A).  
Common Mode Calibration  
a. Send string ''VSET 0; ISET 0; OUT OFF".  
b. Short power supply sense terminals ( + S to - S) at rear panel.  
c. Attach the DVM from M on the rear panel through a 1kΩ resistor to A2J7 pin 3 (V-MON buffered).  
d. Take initial reading from DVM.  
e. Remove both local sensing straps from rear-panel terminal block, and connect a 1-volt external power supply with its +  
lead to - S and its--lead to - Out. See Figure 2-1.  
f. Adjust A2R21 (CV LOAD REG) to Initial Reading  
20µV (6030A)  
80µV (6031A)  
20µV (6032A)  
40µV (6035A)  
g. Replace local sense straps after removing external power supply.  
Note:  
Remote Readback Zero Calibration  
Note:  
Common mode calibration is not required for Agilent Model 6035A.  
This procedure and the following three procedures must be done as a set, without omitting any of the four  
procedures. Also, the following four procedures require that V-MON ZERO (A2R22) be adjusted within  
specifications. If it is not, perform the Voltage Monitor Zero Calibration before proceeding.  
a. Connect an external supply to the power supply as shown in Figure 2-2.  
b. Send string "VSET 0; ISET 5; OUT ON''.  
c. Attach the DVM from M on the rear panel through a 1KΩ resistor to A2J7 pin 3 (V-MON buffered).  
d. Adjust A8R40 (CV PROG ZERO) to 625µV 30µV.  
e. Remove the DVM.  
f. Enter and run the following program and begin noting the controller's display:  
10 OUTPUT 705; "VOUT''  
20 ENTER 705; A  
30 DISP A  
40 GOTO 10  
50 END  
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g. Adjust A8R51 (READBACK ZERO) until the value displayed on the controller toggles between:  
0 and 50mV (6030A)  
0 and 5mV (6031A)  
0 and 15mV (6032A)  
0 and 125mV (6035A)  
h. After adjusting A8R51 you must continue the calibration procedure through to the completion of Constant Voltage  
Zero Calibration. Remember to disconnect the external power supply and resistor.  
Figure 2-1. Common Mode Setup  
Figure 2-2. Remote Readback Zero And CV Zero Calibration Setup  
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Constant Voltage Full Scale Calibration  
Note:  
Perform this procedure only after completing Remote Readback Zero Calibration.  
a. Remove all external test circuits.  
b. Send string:  
"VSET 200; ISET 5; OUT ON" (6030A)  
''VSET 20; ISET 5; OUT ON" (6031A)  
"VSET 60; ISET 5; OUT ON" (6032A)  
"VSET 500; ISET 5; OUT ON" (6035A)  
c. Attach the DVM from - S to + S terminals on rear panel.  
d. Adjust A8R58 (CV PROG F.S.) to:  
200.025 6mV (6030A)  
20.0025 0.6mV (6031A)  
60.0075 1.82mV (6032A)  
500.063 6mV (6035A)  
e. After adjusting A8R58 you must continue the calibration procedure through to the completion of Constant Voltage  
Zero Calibration.  
Voltage Monitor and Remote Readback Full Scale Calibration  
Note:  
Perform this procedure only after completing Constant Voltage Full Scale Calibration.  
a. Attach the DVM from M on the rear panel to A2J7 pin 3 (V-MON buffered). See DVM connection in Figure 2-1.  
b. Send string:  
''VSET 200; ISET 5; OUT ON'' (6030A)  
''VSET 20; ISET 5; OUT ON'' (6031A)  
''VSET 60; ISET 5; OUT ON'' (6032A)  
''VSET 500; ISET 5; OUT ON" (6035A)  
c. Adjust A8R75 (V-MON F.S.) to 5.000625V 100µV.  
d. Disconnect the DVM.  
e. Enter and run the following program and begin noting the controller's display.  
10 OUTPUT 705; ''VOUT?''  
20 ENTER 705; A  
30 DISP A  
40 GOTO 10  
50 END  
f. Adjust A8R61 (READBACK F.S.) until the value displayed on the controller toggles between:  
200.000 and 200.050 Vdc (6030A)  
20.000 and 20.005 Vdc (6031A)  
60.000 and 60.015 Vdc (6032A)  
500.000 and 500.125 Vdc (6035A)  
g. After adjusting A8R61 you must continue the calibration procedure through to the completion of Constant Voltage  
Zero Calibration.  
17  
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Constant Voltage Zero Calibration  
Note:  
Perform this procedure only after completing Voltage Monitor and Remote Readback Full Scale  
Calibration.  
a. Send string "VSET 0; ISET 5; OUT ON".  
b. Connect an external supply to the power supply as shown in Figure 2-2.  
c. Attach the DVM from - S to + S on the rear panel.  
d. Adjust A8R40 (CV PROG ZERO) to 0 120µV.  
Current Monitor Zero Calibration  
a. Send string "VSET 0; ISET 0; OUT OFF''.  
b. Connect a short across power supply output terminals.  
c. Attach the DVM from M to IM on the rear panel.  
d. Allow several minutes (3 or more) to ensure thermal settling.  
e. Adjust A2R8 (I-MON ZERO) to 0 ±100µV.  
Constant Current Zero Calibration  
a. Connect the test setup shown in Figure 2-3.  
b. Send string ''VSET 5; ISET 0; OUT ON''.  
c. Allow several minutes (3 or more) to ensure thermal settling.  
d. Adjust A8R29 (CC PROG ZERO) to:  
0V 0.6mV (6030A, 6035A)  
0V 8.0mV (6031A)  
0V 1.7mV (6032A)  
Figure 2-3. CC Zero Calibration Setup  
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Current Monitor Full Scale Calibration  
Note:  
This procedure requires that I-MON ZERO (A2R8) be adjusted within specifications. If it is not, perform  
the Current Monitor Zero Calibration before proceeding.  
a. Connect Rm current-monitoring shunt:  
(1milliohm, 6031A)  
(10 milliohm, 6030A, 6032A)  
(100 milliohm, 6035A)  
0.05% or better across power supply output terminals.  
b. Send string:  
"VSET 5; ISET 17; OUT ON" (6030A)  
"VSET 5; ISET 120; OUT ON" (6031A)  
"VSET 5; ISET 50; OUT ON" (6032A)  
"VSET 5; ISET 5; OUT ON" (6035A)  
c. Attach DVM from M to IM on the rear panel. Use six-digit display on Agilent 3458A DVM.  
d. Take initial reading from DVM.  
e. Attach DVM across Rm. Allow several minutes (3 or more) to ensure thermal settling. This can be noted as a stable  
reading on the DVM.  
f. Adjust A2R9 (I-MON F.S.) to:  
0.034 * initial reading 33.5µV (6030A)  
0.024 * initial reading 80.0µV (6031A)  
0.100 * initial reading 0.4mV (6032A)  
0.100 * initial reading 67.0µV (6035A)  
Constant Current Full Scale Calibration  
Note:  
This procedure requires that CC PROG ZERO (A8R29) and I-MON F. S. (A2R9) be adjusted within  
specifications. If they are not, perform Constant Current Zero and/or Current Monitor Full Scale  
Calibration before proceeding.  
a. Connect Rm current-monitoring shunt:  
( 1 milliohm, 6031A)  
( 10 milliohm, 6030A, 6032A)  
(100 milliohm, 6035A)  
0.05% or better across power supply output terminals.  
b. Send string:  
"VSET 5; ISET 17; OUT ON" (6030A)  
"VSET 5, ISET 120; OUT ON'' (6031A)  
"VSET 5, ISET 50; OUT ON" (6032A)  
''VSET 5; ISET 5; OUT ON" (6035A)  
c. Attach DVM across Rm. Allow several minutes (3 or more) to ensure thermal settling.  
d. Adjust A8R55 (CC PROG F.S.) to:  
1.70V 0.1mV (6030A)  
0.12V 3.0µV (6031A)  
0.50V 30µV (6032A)  
0.50V 40µV (6035A)  
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Power Limit Calibration  
Note:  
This procedure requires that CC PROG F. S. (A8R55) be adjusted within specifications. If it is not,  
perform Constant Current Full Scale Calibration before proceeding.  
a. Connect the power supply to the ac power line through a variable autotransformer. Connect a DVM across the input  
power rails, with the + lead to the rear of A1R3 and the - lead to the rear of A1R1. Adjust the autotransformer for  
240Vdc on the input power rail. The input power rail must be maintained at 240Vdc during calibration.  
The top inside cover must be removed to connect the DVM. Disconnect the ac mains power cord before  
connecting or disconnecting the DVM.  
a. Connect a electronic load across the output terminals, or use a:  
3.8 ohm 1500W resistor (6030A)  
0.066 ohm 1500W resistor (6031A)  
0.44 ohm 1500 W resistor (6032A)  
39 ohm 1500 W resistor (6035A)  
b. Set the electronic load for:  
17 amperes (6030A)  
120 amperes (6031A)  
51 amperes (6032A)  
5 amperes (6035A)  
in the constant Current mode.  
c. Turn A2R25 (LOWER KNEE) fully counterclockwise.  
d. Turn on power supply and send string:  
"VSET 65; ISET 17.4; OUT ON" (6030A)  
''VSET 8; ISET 121; OUT ON'' (6031A)  
"VSET 22; ISET 51; OUT ON" (6032A)  
''VSET 200; ISET 5.1; OUT ON'' (6035A)  
e. Adjust A2R25 (LOWER KNEE) clockwise until CV LED on front panel turns on. Power supply output should be:  
65 0.2V @17A in CV mode (6030A)  
8 0.08V @120A in CV mode (6031A)  
22 0.2V @50A in CV mode (6032A)  
200 0.5V @5A in CV mode (6035A)  
f. Turn off power supply. Reset the electronic load for:  
5.25A in CC mode (6030A)  
51A in CC mode (6031A)  
18.2A in CC mode (6031A)  
2.2A in CC mode (6035A)  
or change the resistor to:  
38ohm 1500W (6033A)  
0.4ohm 1500W (6031A)  
3.3ohm 1500W(6032A)  
227ohm 1500W(6035A)  
g. Turn A2R26 (UPPER KNEE) fully counterclockwise.  
h. Turn on power supply. Send string  
"VSET 200; ISET 5.5; OUT ON" (6030A)  
"VSET 20.5; ISET 55; OUT ON" (6031A)  
"VSET 60; ISET 19; OUT ON" (6032A)  
"VSET 500; ISET 2.2; OUT ON" (6035A)  
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i. Adjust A2R26 (UPPER KNEE) clockwise until front panel CV LED turns on. Power supply output should be:  
200 0.4V @5.25A in CV mode (6030A)  
20.5 0.5V @55A in CV mode (6031A)  
60 0.4V @18.2A in CV mode (6032A)  
500 0.4V @2.2A in CV mode (6035A)  
Resistance Programming Full Scale Calibration  
a. Send string ''OUT OFF".  
b. Connect a 2K ohm calibration resistor from P to VP on rear panel.  
c. Set rear-panel MODE switches for resistance programming:  
d. Attach the DVM from P to VP on the rear panel.  
e. Adjust A2R23 (R-PROG F.S.) to 2.5V 4mV.  
f. Remember to reset MODE switches to original settings.  
Performance Tests  
The following paragraphs provide test procedures for verifying the unit's compliance with the specifications of Table 1-1 in  
the Operating Manual. Please refer to CALIBRATION PROCEDURE or TROUBLESHOOTING if you observe  
out-of-specification performance. The performance test specifications are listed in the Performance Test Record in  
Appendix C through F. You can record the actual measured values in the columns provided.  
Measurement Techniques  
Setup For All Tests. Measure the output voltage directly at the + S and - S terminals. Connect unit for local sensing, and  
ensure that MODE switches are set as shown below. Select an adequate wire gauge for load leads using the procedures  
given in the Operating Manual for connecting the load.  
Electronic Load. The test and calibration procedures use an electronic load to test the unit quickly and accurately. If an  
electronic load is not available, you may substitute:  
40Ω 1000W load resistor (6030A)  
0.4Ω 1000W load resistor (6031A)  
3.5Ω 1000W load resistor (6032A)  
250Ω 1000W load resistor (6035A)  
for the electronic load in these tests:  
CV Source Effect (Line Regulation)  
CC Load Effect (Load Regulation)  
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You may substitute:  
3.5Ω 1000W load resistor (6030A)  
0.069Ω 1000W load resistor (6031A)  
0.4Ω 1000W load resistor (6032A)  
40Ω 1000W load resistor (6035A)  
in these tests:  
CV Load Effect (Load Regulation)  
CV PARD (Ripple and Noise)  
CC Source Effect (Line Regulation)  
CC PARD (Ripple and Noise)  
The substitution of the load resistor requires adding a load switch and making minor changes to the procedures. The load  
transient recovery time test procedure is not amenable to modification for use with load resistors.  
An electronic load is considerably easier to use than a load resistor. It eliminates the need for connecting resistors or  
rheostats in parallel to handle the power, it is much more stable than a carbon-pile load, and it makes easy work of switching  
between load conditions as is required for the load regulation and load transient-response tests.  
Current-Monitoring Resistor. To eliminate output current measurement error caused by voltage drops in the leads and  
connections, connect the current-monitoring resistor between -OUT and the load as a four-terminal device. Figure 2-4  
shows correct connections. Connect the current-monitoring test leads inside the load-lead connections directly at the  
monitoring resistor element.  
Note:  
A current-monitoring resistor with 1% accuracy is suitable for all tests except current programming  
accuracy and current readback accuracy. For these tests, use the shunt listed in Table 2-1.  
Figure 2-4. Current-Monitoring Resistor Setup  
GPIB Controller. Most performance tests can be performed using only front-panel controls. However, a GPIB controller is  
required to perform the voltage and current programming accuracy tests and the voltage and current readback accuracy tests.  
Constant Voltage (CV) Tests  
CV Setup. If more than one meter or a meter and an oscilloscope are used, connect each to the + S and - S terminals by a  
separate pair of leads to avoid mutual coupling effects. Connect only to + S and -S because the unit regulates the output  
voltage between + S and - S, not between + OUT and -OUT. Use coaxial cable or shielded 2-wire cable to avoid pickup on  
test leads. For all CV tests set the output current at full output to assure CV operation.  
Voltage Programming And Readback Accuracy. This procedure verifies that the voltage programming and readback  
functions are within specifications. A GPIB controller must be used for this test.  
a. Connect digital voltmeter between + S and - S.  
b. Turn on ac power to the power supply.  
c. Send string:  
"VSET 0.5; ISET 17" (6030A)  
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''VSET 0.1; ISET 120'' (6031A)  
''VSET 0.09; ISET 50" (6032A)  
''VSET 1.0; ISET 5'' (6035A)  
d. The DVM reading should be in the range:  
0.354 to 0.645Vdc (6030A)  
0.085 to 0.115Vdc (6031A)  
0.050 to 0.130Vdc (6032A)  
0.598 to 1.400Vdc (6035A)  
Note the reading.  
e. Enter and run the following program:  
10 OUTPUT 705; "VOUT?"  
20 ENTER 705;A  
30 DISP A  
40 GOTO 10  
50 END  
f. The value displayed by the controller should be the value noted in step d:  
0.080Vdc (6030A)  
0.007Vdc (6031A)  
0.020 Vdc (6032A)  
0.205 Vdc (6035A)  
g. Send string:  
"VSET 200; ISET 17" (6030A)  
''VSET 20; ISET 120'' (6031A)  
''VSET 60; ISET 50" (6032A)  
''VSET 500; ISET 5" (6035A)  
h. The DVM reading should be in the range:  
199.785 to 200.215Vdc (6030A)  
19.978 to 20.022Vdc (6031A)  
59.939 to 60.061 Vdc (6032A)  
498.350 to 501.650 Vdc (6035A)  
Note the reading.  
i. Run the program listed in step e. The value displayed by the controller should be the value noted in step h:  
0.240Vdc (6030A)  
0.023 Vdc (6031A)  
0.068 Vdc (6032A)  
2.700 Vdc (6035A)  
Load Effect (Load Regulation). Constant-voltage load effect is the change in dc output voltage (Eo) resulting from a  
load-resistance change from open-circuit to full-load. Full-load is the resistance which draws the maximum rated output  
current at voltage Eo. Proceed as follows:  
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set  
resistance to maximum.  
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.  
c. Turn up output voltage to:  
60Vdc (6030A)  
7.0Vdc (6031A)  
20.0Vdc (6032A)  
200Vdc (6035A)  
as read on the digital voltmeter.  
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Figure 2-5. Basic Test Setup  
d. Reduce the resistance of the load to draw an output current of:  
17.0Adc (6030A)  
120Adc (6031A)  
50 Adc (6032A)  
5.0 Adc (6035A)  
Check that the unit's CV LED remains lighted.  
e. Open-circuit the load.  
f. Record the output voltage at the digital voltmeter.  
g. Reconnect the load.  
h. When the reading settles, record the output voltage again. Check that the two recorded readings differ no more than:  
0.011Vdc (6030A)  
0.0037Vdc (6031A)  
0.007 Vdc (6032A)  
0.033 Vdc (6035A)  
Source Effect (Line Regulation). Source effect is the change in dc output voltage resulting from a change in ac input  
voltage from the minimum to the maximum value as specified in Input Power Requirements in the Specifications Table, in  
the Operating Manual. Proceed as follows:  
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set  
resistance to maximum.  
b. Connect the unit to the ac power line through a variable autotransformer which is set for nominal line voltage.  
c. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.  
d. Turn up output voltage to:  
200Vdc (6030A)  
20.0Vdc (6031A)  
60.0Vdc (6032A)  
500Vdc (6035A)  
as read on the digital voltmeter.  
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e. Reduce the resistance of the load to draw an output current of:  
5.0Adc (6030A)  
50 Adc (6031A)  
16.5 Adc (6032A)  
2.0 Adc (6035A)  
Check that the unit's CV LED remains lighted.  
f. Adjust autotransformer to the minimum for your line voltage.  
g. Record the output voltage at the digital voltmeter.  
h. Adjust autotransformer to the maximum for your line voltage.  
i. When the reading settles record the output voltage again. Check that the two recorded readings differ no more than:  
0.011Vdc (6030A)  
0.004Vdc (6031A)  
0.009Vdc (6032A)  
0.063Vdc (6035A)  
PARD (Ripple And Noise). Periodic and random deviations (PARD) in the unit's output-ripple and noise-combine to  
produce a residual ac voltage superimposed on the dc output voltage. Constant-voltage PARD is specified as the  
root-mean-square (rms) or peak-to-peak (pp) output voltage in a frequency range of 20 Hz to 20 MHz.  
RMS Measurement Procedure. Figure 2-6 shows the interconnections of equipment to measure PARD in Vrms. To ensure  
that there is no voltage difference between the voltmeter's case and the unit's case, connect both to the same ac power outlet  
or check that the two ac power outlets used have the same earth-ground connection.  
Use the common-mode choke as shown to reduce ground-loop currents from interfering with measurement. Reduce noise  
pickup on the test leads by using 50Ω coaxial cable, and wind it five turns through the magnetic core to form the  
common-mode choke. Proceed as follows:  
a. Connect the test equipment as shown in Figure 2-6. Operate the load in constant resistance mode (Amps/Volt) and set  
resistance to maximum.  
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.  
c. Turn up output voltage to:  
60Vdc (6030A)  
7Vdc (6031A)  
20Vdc (6032A)  
200Vdc (6035A)  
d. Reduce the resistance of the load to draw an output current of:  
17.0Adc (6030A)  
120Adc (6031A)  
50Adc (6032A)  
5.0Adc (6035A)  
Check that the unit's CV LED remains lighted.  
e. Check that the rms noise voltage at the true rms voltmeter is no more than:  
22mV rms (6030A)  
8 mV rms (6031A)  
6 mV rms (6032A)  
50 mV rms (6035A)  
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Figure 2-6. RMS Measurement Test Setup, CV PARD Test  
Peak Measurement Procedure. Figure 2-7 shows the interconnections of equipment to measure PARD in Vpp. The  
equipment grounding and power connection instructions of Paragraph 2-36 apply to this setup also. Connect the  
oscilloscope to the + S and - S terminals through 0.01µF blocking capacitors to protect the oscilloscope's input from the  
unit's output voltage. To reduce common-mode noise pickup, set up the oscilloscope for a differential, two-channel voltage  
measurement. To reduce normal-mode noise pickup, use matched-length, 1 meter or shorter, 50Ω coaxial cables with  
shields connected to the oscilloscope case and to each other at the other ends. Proceed as follows:  
a. Connect the test equipment as shown in Figure 2-7. Operate the load in constant resistance mode (Amps/Volt) and set  
resistance to maximum.  
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.  
c. Turn up output voltage to:  
60Vdc (6030A)  
7Vdc (6031A)  
20Vdc (6032A)  
200 Vdc (6035A)  
d. Turn up output current setting to full output and reduce the resistance of the load to draw an output current of:  
17.0Adc (6030A)  
120Adc (6031A)  
50Adc (6032A)  
5.0Adc (6035A)  
Check that the unit's CV LED remains lighted.  
e. Set the oscilloscope's input impedance to 50Ω and bandwidth to 20MHz. Check that the peak-to-peak is no more than:  
50mV (6030A/31A)  
40mV (6032A)  
160mV (6035A)  
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Figure 2-7. Peak-To-Peak Measurement Test Setup, CV PARD Test  
Load Transient Recovery Time. Specified for CV operation only; load transient recovery time is the time for the output  
voltage to return to within a specified band around its set voltage following a step change in load.  
Use the equipment setup of Figure 2-5 to display output voltage transients while switching the load between 10% with the  
output set at:  
60Vdc (6030A)  
7Vdc (6031A)  
20Vdc (6032A)  
200Vdc (6035A)  
Proceed as follows:  
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant-current mode and set for minimum  
current.  
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up current setting to full output.  
c. Turn up output voltage to:  
60Vdc (6030A)  
7Vdc (6031A)  
20.0Vdc (6032A)  
200Vdc (6035A)  
as read on the digital voltmeter.  
d. Set the load to vary the load current between:  
15.3 and 17Adc (6030A)  
108 and 120Adc (6031A)  
45 and 50Adc (6032A)  
4.5 and 5.0 Adc (6035A)  
at a 30Hz rate for the 10% RECOVERY TEST.  
e. Set the oscilloscope for ac coupling, internal sync and lock on either the positive or negative load transient.  
f. Adjust the oscilloscope to display transients as in Figure 2-8.  
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.
Figure 2-8. Load Transient Recovery Waveform  
g. Check that the amplitude of the transient pulse at 1 ms is no more than:  
150mV/2ms (6030A)  
100mV/2ms (6031A)  
100mV/2ms (6032A)  
200mV/5ms (6035A)  
Constant Current (CC) Tests  
CC Setup. Constant-current tests are analogous to constant-voltage tests, with the unit's output short circuited and the  
voltage set to full output to assure CC operation. Follow the general setup instructions of Pages 21 and 22.  
Current Programming And Readback Accuracy. This procedure verifies that the current programming and readback  
functions are within specifications. A GPIB controller must be used for this test. The accuracy of the current shunt resistor  
(Rm) must be 0.02% or better. Proceed as follows:  
a. Connect test setup shown in Figure 2-5, except replace the load with a short circuit.  
b. Turn on ac power to the power supply.  
c. Send string:  
"VSET 200; ISET 0.5" (6030A)  
"VSET 20; ISET 0.5" (6031A)  
''VSET 60; ISET 0.5" (6032A)  
''VSET 500; ISET 0.10" (6035A)  
d. Check that the voltage across Rm is in the range:  
4.75 to 5.25mV (6030A)  
248 to 751µV (6031A)  
4.14 to 5.86mV (6032A)  
1.5 to 1.85mV (6035A)  
Note the reading.  
e. Enter and run the following program:  
10 OUTPUT 705; "IOUT?''  
20 ENTER 705; A  
30 DISP A  
40 GOTO 10  
50 END  
f. The value displayed by the controller should be the actual output current:  
17mA (6030A)  
102mA (6031A)  
36mA (6032A)  
50 mA (6035A)  
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g. Send string:  
"VSET 200; ISET 17" (6030A)  
''VSET 20; ISET 120" (6031A)  
''VSET 60; ISET 50" (6032A)  
''VSET 500; ISET 5" (6035A)  
h. Check that the voltage across Rm is in the range:  
169.72 to 170.28mV (6030A)  
119.4 to 120.55mV (6031A)  
498.1 to 501.8 mV (6032A)  
490 to 510 mV (6035A)  
Note the reading.  
i. Run the program listed in step e.  
j. The value displayed by the controller should be the actual output current:  
76mA (6030A)  
580mA (6031A)  
215mA (6032A)  
75mA (6035A)  
Load Effect (Load Regulation). Constant current load effect is the change in dc output current (Io) resulting from a  
load-resistance change from short-circuit to full-load, or full-load to short-circuit. Full-load is the resistance which develops  
the maximum rated output voltage at current Io. Proceed as follows:  
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set  
resistance to minimum.  
b. Turn the unit's power on, and, using DISPLAY SETTINGS pushbutton switch, turn up voltage setting to full output.  
c. Turn up output current to:  
5.0Adc (6030A)  
50Adc (6031A)  
16.5Adc (6032A)  
2.0Adc (6035A)  
d. Increase the load resistance until the output voltage at +S and -S decreases to:  
200Vdc (6030A).  
20Vdc (6031A).  
60Vdc (6032A)  
500Vdc (6035A)  
Check that the CC LED is lighted and AMPS display still reads ≈ current setting.  
e. Short-circuit the load and allow the voltage across Rm to stabilize.  
f. Record voltage across Rm.  
g. Disconnect short across load.  
h. When the reading settles (≈ 10s), record the voltage across Rm again. Check that the two recorded readings differ no  
more than:  
10mA (6030A)  
20mA (6031A)  
11mA (6032A)  
34mA (6035A)  
Source Effect (Line Regulation). Constant current source effect is the change in dc output current resulting from a change  
in ac input voltage from the minimum to the maximum values listed in the Specifications Table in the Operating Manual.  
Proceed as follows:  
a. Connect the test equipment as shown in Figure 2-5. Operate the load in constant resistance mode (Amps/Volt) and set  
resistance to minimum.  
b. Connect the unit to the ac power line through a variable autotransformer set for nominal line voltage.  
c. Switch the unit's power on and turn up output voltage setting to full output.  
29  
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d. Turn up output current to:  
17.0Adc (6030A)  
120Adc (6031A)  
50Adc (6032A)  
5.0 Adc (6035A)  
e. Increase the load resistance until the output voltage between + S and - S decreases to:  
60Vdc (6030A)  
7.0Vdc (6031A)  
20.0Vdc (6032A)  
200 Vdc (6035A)  
Check that the CC LED is still on.  
f. Adjust autotransformer to the minimum for your line voltage.  
g. Record the voltage across Rm.  
h. Adjust autotransformer to the maximum for your line voltage.  
i. When the reading settles record the voltage across Rm again. Check that the two recorded readings differ no more than:  
6mA (6030A)  
37mA (6031A)  
15mA (6032A)  
18 mA (6035A)  
PARD Ripple And Noise. Periodic and random deviations (PARD) in the unit's output (ripple and noise) combine to  
produce a residual ac current as well as an ac voltage super-imposed on the dc output. The ac voltage is measured as  
constant-voltage PARD, Page 23. Constant-current PARD is specified as the root-mean-square (rms) output current in a  
frequency range 20Hz to 20MHz with the unit in CC operation. To avoid incorrect measurements, with the unit in CC  
operation, caused by the impedance of the electronic load at noise frequencies, use a:  
3.5Ω (6030A)  
0.069Ω (6031A)  
0.4Ω (6032A)  
40Ω (6035A)  
load resistor that is capable of safely dissipating 1000 watts. Proceed as follows:  
a. Connect the test equipment as shown in Figure 2-9.  
Note: For Agilent 6031A units, use a 30Adc power supply in the test setup to subtract from the 120Adc of the Agilent  
603lA unit under test. This will prevent the current probe specified in Table 2-1 from saturating. Make  
sure the rms noise of the 30Adc supply is less than 10mA rms.  
b. Switch the unit's power on and turn the output voltage all the way up.  
c. Turn up output current to:  
17.0Adc (6030A)  
120Adc (6031A)  
50 Adc (6032A)  
5.0 Adc (6035A)  
Check that the unit's CC LED remains lighted.  
d. Check that the rms noise current measured by the current probe and rms voltmeter is no more than:  
15mA rms (6030A).  
120mA rms (6031A)  
25mA rms (6032A)  
50 mA rms (6035A)  
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Figure 2-9. CC PARD Test Setup  
Initialization Procedure  
Follow the procedure if either the GPIB assembly has been replaced, or the EEPROM (U70) has been replaced:  
1. Install the GPIB assembly in the unit.  
2. Turn the power on and depending on your unit's model number, send string:  
"EEINIT 6030"  
"EEINIT 6031''  
"EEINlT 6032"  
or  
''EEINIT 6035"  
3. Turn the power off, wait 5 seconds, then turn the power back on.  
4. If the GPIB assembly has been replaced, calibrate the unit.  
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3
Troubleshooting  
Maintenance described herein is performed with power supplied to the instrument, and protective covers  
removed. Such maintenance should be performed only by service-trained personnel who are aware of the  
hazards involved (for example, fire and electrical shock). Where maintenance can be performed without  
power applied, the power should be removed.  
Introduction  
Before attempting to troubleshoot this instrument, ensure that the fault is with the instrument itself and not with an  
associated circuit. The performance test enables this to be determined without having to remove the covers from the supply.  
The most important aspect of troubleshooting is the formulation of a logical approach to locating the source of trouble. A  
good understanding of the principles of operation is particularly helpful, and it is recommended that Chapter 4 of this  
manual be reviewed before attempting to troubleshoot the unit. Often the user will then be able to isolate a problem simply  
by using the operating controls and indicators. Once the principles of operation are understood, refer to the following  
paragraphs.  
Table 2-1 lists the test equipment for troubleshooting. Chapter 6 contains schematic diagrams and information concerning  
the voltage levels and waveforms at many of the important test points. Most of the test points used for troubleshooting the  
supply are located on the control board test "fingers", which are accessible close to the top of the board. See Table 3-9.  
If a component is found to be defective, replace it and re-conduct the performance test. When a component is replaced, refer  
to Calibration Procedure (Chapter 2). It may be necessary to perform one or more of the adjustment procedures after a  
component is replaced.  
Initial Troubleshooting Procedures  
If a problem occurs, follow the steps below in sequence:  
a. Check that input power is available, and check the power cord and rear-panel circuit breaker.  
b. Check that the settings of mode switch A2S1 are correct for the desired mode of operation. (See Operating Manual).  
c. Check that all connections to the power supply are secure and that circuits between the supply and external devices are  
not interrupted.  
d. Check that the rear-panel GPIB address switch A8S1 is properly set. (See Operating Manual).  
e. If the power supply fails turn-on self-test or gives any other indication of malfunction, remove the unit from the  
operating system before proceeding with further testing.  
Some circuits on the power mesh are connected directly to the ac power line. Exercise extreme caution  
when working on energized circuits. Energize the supply through an isolation transformer to avoid  
shorting ac energized circuits through the test instrument's input leads. The isolation transformer must  
have a power rating of at least 4KVA. During work on energized circuits, the safest practice is to  
disconnect power, make or change the test connections, and then re-apply power.  
Make certain that the supply's ground terminal ( ) is securely connected to an earth ground before  
┴
applying power. Failure to do so will cause a potential shock hazard that could result in personal injury.  
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Electrostatic Protection  
The following caution outlines important precautions which should be observed when working with static sensitive  
components in the power supply.  
This instrument uses components which can be damaged by static charge. Most semiconductors can  
suffer serious performance degradation as a result of static charges, even though complete failure may  
not occur. The following precautions should be observed when handling static-sensitive devices.  
a. Always turn power off before removing or installing printed-circuit boards.  
b. Always stored or transport static-sensitive devices (all semiconductors and thin-film devices) in conductive material.  
Attach warning labels to the container or bag enclosing the device.  
c. Handle static-sensitive devices only at static-free work stations. These work stations should include special conductive  
work surfaces (such as Agilent Part No. 9300-0797) grounded through a one-megohm resistor. Note that metal table  
tops and highly conductive carbon-impregnated plastic surfaces are too conductive; they can act as large capacitors and  
shunt charges too quickly. The work surfaces should have distributed resistance of between 106and 10l2 Ω per square.  
d. Ground all conductive equipment or devices that may come in contact with static-sensitive devices or subassemblies  
containing same.  
e. Where direct grounding of objects in the work area is impractical, a static neutralizer should be used (ionized air blower  
directed at work). Note that this method is considerably less effective than direct grounding and provides less protection  
for static-sensitive devices.  
f. While working with equipment on which no point exceeds 500 volts, use a conductive wrist strap in contact with skin.  
The wrist strap should be connected to ground through a one-megohm resistor. A wrist strap with insulated cord and  
built-in resistor is recommended, such as 3M Co. No. 1066 (Agilent Part No. 9300-0969 (small) and 9300-0970  
[large]).  
Do not wear a conductive wrist strap when working with potentials in excess of 500 volts; the one-megohm  
resistor will provide insufficient current limiting for personal safety.  
g. All grounding (device being repaired, test equipment, soldering iron, work surface, wrist strap, etc.) should be done to  
the same point.  
h. Do not wear nylon clothing. Keep clothing of any kind from coming within 12 inches of static-sensitive devices.  
i. Low-impedance test equipment (signal generators, logic pulsers, etc.) should be connected to static-sensitive inputs  
only while the components are powered.  
j. Use a mildly activated rosin core solder (such as Alpha Metal Reliacor No. 1, Agilent Part No. 8090-0098) for repair.  
The flux residue of this type of solder can be left on the printed circuit board. Generally, it is safer not to clean the  
printed-circuit board after repair. Do not use Freon or other types of spray cleaners. If necessary, the printed-circuit  
board can be brushed using a natural-bristle brush only. Do not use nylon-bristle or other synthetic-bristle brushes. Do  
not use high-velocity air blowers (unless ionized).  
k. Keep the work area free of non-conductive objects such as Styrofoam-type cups, polystyrene foam, polyethylene bags,  
and plastic wrappers. Non-conductive devices that are necessary in the area can be kept from building up a static charge  
by spraying them with an anti-static chemical (Agilent Part No. 8500-3397).  
l. Do not allow long hair to come in contact with static-sensitive assemblies.  
m. Do not exceed the maximum rated voltages specified for the device.  
Repair and Replacement  
Repair and replacement of most components in the power supply require only standard techniques that should be apparent to  
the technician. The following paragraphs provide instructions for removing certain assemblies and components for which  
the procedure may not be obvious upon inspection.  
To avoid the possibility of personal injury, remove the power supply from operation before opening the  
cabinet. Turn off ac power and disconnect the line cord, GPIB plug, load, and remote sense leads before  
attempting any repair or replacement.  
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When replacing any heatsink-mounted components except thermostat, smear a thin coating of heatsink  
compound between the component and heatsink. If a mica insulator is used, smear a thin coating of  
heatsink compound on both sides of the mica insulator.  
Do not use any heatsink compound containing silicone, which can migrate and foul electrical contacts  
elsewhere in the system. An organic zinc oxide cream, such as American Oil and Supply Company  
Heatsink Compound #100, is recommended.  
Most of the attaching hardware in this unit is metric. The only non-metric (sometimes called English or  
inch) fittings are listed below. Be careful when both types of screws are removed not to get them mixed  
up.  
a. Screws that secure the input and output capacitors to A1 main board and output bus bars.  
b. Rear-panel circuit breaker.  
c. Rear-panel ground binding post.  
d. Strap-handle screws (2).  
e. Screws that secure side chassis to front-frame casting (4, 2 on top and 2 on bottom).  
Top Outside Cover Removal. Remove the two top rear screws using a Size 2, Pozidriv screwdriver. A Phillips head  
screwdriver does not fully seat into Pozidriv screws and risks stripping the heads. Remove the top cover by sliding it to the  
rear and lifting at the front.  
Bottom Cover Removal. Remove the handles from both sides of the unit and remove the bottom cover by sliding it to the  
rear. Use a Phillips head #2 screwdriver to remove the handle screws. You do not need to remove the unit's feet.  
Inside Top Cover Removal. The unit includes an inside cover which secures the vertical board assemblies. Remove the  
inside cover for repair but not for calibration.  
Remove the nine mounting screws (Pozidriv, M4x.7) -two on the left side, three on the right side, four on top. Remove the  
inside cover by lifting at the front edge.  
When installing the inside cover, insert it first at the right side. While holding it tilted up at the left, reach through the  
cutouts in the cover and fit the top tabs of the A8 GPIB board into the mating slots in the cover. Then repeat the process for  
the A2 control board, the A4 FET board, and the A5 Diode board. Press the inside cover down firmly while tightening  
screws that secure cover to chassis. Be careful not to bend any boards or components.  
A2 Control Board Removal  
After removing the inside cover, unplug the W5 and W6 ribbon cables at the top edge of the A2 control board. Then unplug  
the W7 and W8 ribbon cables from the lower center of the board. Remove the A2 board by lifting first at the front edge and  
than pulling it up and out of the unit.  
When installing the A2 board, insert it first at the rear of the unit. While holding it tilted up at the front, fit the A2TB1  
terminal strip into the mating cutout in the rear panel. Then lower the A2 board's bottom connectors into the mating  
connectors on the main board. Press the A2 board into the connectors, and reinstall the W5, W6, W7, and W8 ribbon  
cables.  
A4 FET Board Removal  
After removing the inside cover, remove the A4 mesh board by lifting, using the large aluminum heatsink as a handle. One  
connector and one tab holds the A4 board at its bottom edge.  
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When installing the A4 power mesh board, lower it vertically, placing its tab into the A1 board slot, align the connector and  
press in place.  
A5 Diode Board Removal  
After removing the cover, remove the A5 Diode board by first removing the two screws (Pozidriv) that hold heatsinks to the  
A1 board, then lift vertically to remove the A5 board from the connector.  
When installing the A5 Diode board, lower it vertically into the mating connector on the A1 board, then install a screw  
between each heatsink and Al board.  
A8 GPIB Board Removal  
Remove the A8 board as follows:  
a. Remove the two screws (Pozidriv, M3x.5) which attach the A8 GPIB board to the rear panel. Remove the single screw  
(Pozidriv, M4x.7) that secures the GPIB board to the side frame near the front corner.  
b. After removing the inside cover, unplug the W5 and W6 ribbon cables at the top edge of the A8 board, the W2 3-wire  
cable from connector A8J10 and the W1 ribbon cable from connector A8J9.  
c. Remove the A8 board lifting it straight up.  
Install the A8 board by reversing the above steps. Lower the rear side of the board into the unit first and fit the bottom tabs  
into their mating slots.  
A3 Front-Panel Board Removal  
Remove the A3 front-panel board by first removing the entire front panel assembly. You do not need to remove the top  
cover. Follow this procedure:  
a. Remove the top plastic insert by prying up with a flat-blade screwdriver.  
b. Remove the four front-panel assembly mounting screws (Pozidriv M4) on the top and bottom at the comers.  
c. Gently pull the front-panel assembly away from the unit as far as permitted by the connecting cables.  
d. Note the locations of the four power-wire connections to the power switch and then unplug the quick-connect plugs.  
e. Unplug the W3 3-wire cable from connector A1J4 on the A2 control board, and unplug the W1 ribbon cable from  
connector A8J9 on the A8 GPIB board.  
f. Remove the A3 board from the front-panel assembly by removing the six mounting screws (Pozidriv, M4x.7)  
Install the A3 Board by reversing the steps above.  
A1 Main Board Removal  
Removing the A1 main board requires removing the rear-panel, all boards except the A3 front-panel board, and 17 A1  
board mounting screws, four standoffs, and two bus bar mounting screws. Component-access cutouts in the bottom inside  
cover allow unsoldering most A1-board components for repair without removing the A1 board.  
Proceed as follows  
a. Remove the A2, A4, A5, and A8 boards according to the above instructions.  
b. Remove the AC power cord from the cooling fan and the four AC Input Power wires.  
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AC Input Wire  
Terminal Destination  
designator location  
from  
L6 (chassis)  
RFI filter  
Circuit breaker  
L6 (chassis)  
color  
white  
white/gray  
white/brown/gray  
white  
P
N
L
left rear  
behind A1K1  
behind A1K1  
A1K1 front armature  
c. Remove the following mounting screws, all Pozidriv:  
2 (1 each) from the output bus bars  
7 from the A1 board  
4 from transformer AlT2  
4 from transformer AlT3  
2 from relay AlK1  
4 inside-cover mounting posts 5/16 hex  
d. Lift the A1 board up and toward the rear, then remove the wires from the front panel switch A3S1.  
A1 Designator  
Wire color  
white/gray  
gray  
white/brown/gray  
white/red/gray  
A3S1 Position (Rear View)  
A
B
C
D
S1  
B - | - A  
C - | - D  
Install the A1 board by reversing the above steps. Be careful to follow the wire color code.  
Overall Troubleshooting Procedure  
The overall troubleshooting procedure for the unit involves isolating the problem to one of several circuit blocks and  
troubleshooting the block individually. The GPIB/microprocessor related circuit blocks are located on the A3 (front panel)  
and the A8 (GPIB) boards. They are referred to collectively as the GPIB section. The power supply circuit blocks are on the  
A1 (main), the A2 (control), the A4 (FET), and the A5 (diode) boards. They are referred to collectively as the power  
section.  
The flowchart of Figure 3-1 provides troubleshooting isolation procedures to guide you either to the appropriate circuit or to  
one of the detailed troubleshooting procedures in this section. The purpose of the flowchart is only to isolate the problem to  
a specific area of the power supply. If you have already isolated the problem, proceed directly to the applicable  
troubleshooting section.  
Table 3-1 lists the error codes that may appear on the front panel when the unit performs its internal selftest. Along with the  
error codes, the table also identifies various circuits or components that may have caused that error code to appear.  
In the Power Section Troubleshooting, Tables 3-10 and 3-11 give various power supply symptoms that identify the  
corresponding board, circuit or components that may have caused that symptom. The symptoms in Table 3-10 may become  
apparent when running the Performance Tests in Section 2.  
GPIB Section Troubleshooting  
The GPIB section troubleshooting consists of primary and secondary interface troubleshooting. Signature analysis is  
required to troubleshoot the primary and secondary processor as well as the front panel board. Other circuits on the GPIB  
board, such as the voltage and current DACs, can be checked using either signature analysis or the front panel controls. The  
readback circuits cannot be checked using signature analysis. Figure 3-2 illustrates the test setup that allows access to the  
GPIB board components for troubleshooting.  
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Figure 3-1. Troubleshooting Isolation  
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Figure 3-1. Troubleshooting Isolation (continued)  
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To remove the GPIB board, perform the GPIB board removal procedure discussed earlier in this section. Lay out the board  
as shown in Figure 3-2 with a piece of insulating material under the board. Reconnect connectors W1, W2, W5, and W6  
after the board is on the insulating material.  
Note:  
The GPIB board can be placed alongside the unit for troubleshooting by using extender cables provided in  
service kit Agilent P/N 06033-60005.  
Table 3-1. Selftest Error Code Troubleshooting  
Error Code  
ERROR 4  
ERROR 5  
ERROR 6  
ERROR 7  
ERROR 8  
ERROR 10  
ERROR 12  
ERROR 13  
ERROR 14  
ERROR 15  
ERROR 16  
ERROR 17  
ERROR 18  
ERROR 19  
ERROR 20  
Description  
External RAM Test  
Internal RAM Test  
External ROM Test  
GPIB Test  
GPIB address set to 31  
Internal ROM Test  
ADC Zero Too High  
Voltage DAC Full Scale Low  
Voltage DAC Full Scale High  
Voltage DAC Zero Low  
Voltage DAC Zero High  
Current DAC Full Scale Low  
Current DAC Full Scale High  
Current DAC Zero Low  
Current DAC Zero High  
Check Functional Circuit  
Replace A8U8  
Replace A8U14  
Replace A8U6  
Replace A8U17  
Replace A8U4  
Check U11,20,24,66,67; go to Readback DAC Troubleshooting  
┐
│
│
│
├─  
│
│
│
┘
Check U2,7,64,69  
Check U2,7,64,69  
Check U2,7,64,69  
Check U2,7,64,69  
Check U9,65,68  
Check U9,65,68  
Check U9,65,68  
Check U9,65,68  
Go to Secondary SA  
Troubleshooting  
Primary Interface Troubleshooting  
Primary interface troubleshooting checks for the presence of bias voltages, clock signals (see Figure 3-3), and activity on the  
data lines. Primary signature analysis may be used to further troubleshoot these circuits, but since the address and data lines  
go to so many IC's, it may not be cost-effective to narrow an incorrect signature to a specific chip. GPIB board replacement  
may be the most cost-effective solution.  
Note:  
The initialization procedure in Page 31 must be performed when the GPIB board is replaced.  
Figure 3-2. GPIB Board Test Setup  
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+5V and PCLR Circuits:  
Node  
U1-8  
U1-2  
U1-3  
U1-4  
U1-6  
Measurement  
≈ 3.5Vdc  
= 4 Vdc  
= 4.2Vdc  
= 4.2Vdc  
≈50mVdc  
Clock Signals (see clock waveforms in Figure 3-3)  
Node  
C7+,C8+  
J5-8  
Measurement  
= 12MHz (see waveform)  
= 6MHz (see waveform)  
≈ 50mVdc (see waveform)  
Source  
Y2  
U14  
U35-12  
U35  
Data Lines Check that all data and address lines are toggling. Address and data lines go to the following IC's:  
Address Lines  
U6: A0 to A15  
U8: A0 to A15  
U12: A0 to A4  
U14: A8 to A15  
U16: A0 to A7  
U17: A0 to A2  
U36: A7 to A15  
Data Lines  
U6: D0 to D7  
U8: D0 to D7  
U12: D0 to D7  
U14: D0 to D7  
U16: D0 to D7  
U17: D0 to D7  
Note:  
Data and address lines may not toggle if one line is shorted either high or low. If no short is found, replace  
all socketed IC's. If the data lines still do not toggle, replace the GPIB (A8) assembly.  
Node  
A0 to A15  
D0 to D7  
Measurement  
Toggling  
Toggling  
Secondary Interface Troubleshooting  
Secondary interface troubleshooting checks the operation of the voltage, current, and readback DACs as well as analog  
multiplexer and secondary microprocessor. The analog multiplexer is checked in the Readback DAC troubleshooting  
procedure. The secondary microprocessor can only be checked using secondary SA (refer to Signature Analysis).  
Voltage and Current DAC  
The voltage and current DACs can be checked either from the front panel or by secondary SA. Refer to Signature Analysis  
to troubleshoot the voltage and current DACs in this manner.  
Note:  
To troubleshoot the voltage and current DACs from the front panel if the unit has failed selftest, place  
jumper A8J5 in the skip selftest position (see Table 3-2). This lets you operate the unit even though it fails  
the internal selftest.  
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Figure 3-3. Clock and Primary SA Waveforms  
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Use the front panel controls to vary the output voltage and current from zero to full-scale output. Remember to turn off the  
unit and connect a short across the output before programming the current from zero to full scale. Use a DMM and check  
the voltages at the following nodes:  
CV DAC Circuits  
Node  
Setup  
Measurement  
U69-6  
Voltage set to 0.  
Voltage set to max.  
0V  
+ 5V  
U64-6  
Voltage set to 0.  
0V  
Voltage set to max.  
-10V  
CC DAC Circuits  
Node  
Setup  
Measurement  
U68-6  
Current set to 0.  
0V  
Current set to max.  
+ 5V  
U65-6  
Current set to 0.  
0V  
Current set to max.  
-10V  
Readback DAC Circuits  
Refer to Figure 3-4 for the waveforms to troubleshoot the readback circuits.  
The turn-on selftest waveform at U24-7 is obtained by toggling the on/off switch repeatedly to perform the selftest routine.  
If this waveform is not correct, isolate the problem either to the readback DAC or the multiplexer.  
Note:  
To troubleshoot the readback DAC from the front panel if the unit has failed selftest, place jumper A8J5 in the  
skip selftest position (see Table 3-2). This lets you operate the unit even though it fails the internal selftest.  
Use the front panel controls to vary the output voltage from zero to full-scale output to obtain the waveforms at U67-6.  
These waveforms check the operation of the readback DAC.  
To check the multiplexer, use the front panel controls to obtain the waveforms at the output of the multiplexer (U24-2).  
Remember to turn off the unit and connect a short across the output before programming the current from zero to full scale.  
Press "OVP DISPLAY'' on the front panel to display the OV_MON portion of the waveforms.  
If the waveforms are not correct, use the front panel controls and a DMM to check the multiplexer input voltages at the  
following nodes:  
Readback Multiplexer (U20):  
Node  
Setup  
Measurement  
U20-9  
Voltage set to 0.  
Voltage set to max.  
0V  
+ 5V  
U20-10  
U20-11  
Current set to 0.  
Current set to max.  
0V  
+ 5V  
OV set to 0.  
0V  
OV set to max.  
+2.2V  
43  
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Figure 3-4. Readback and Secondary SA Waveforms  
44  
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Signature Analysis  
Perform the signature analysis only after you have completed the Primary Processor Troubleshooting.  
The easiest and most efficient method of troubleshooting microprocessor-based instruments is signature analysis. Signature  
analysis is similar to signal tracing with an oscilloscope in linear circuits. Part of the microcomputer memory is dedicated to  
signature analysis and a known bit stream is generated to stimulate as many nodes as possible within the circuit. However,  
because it is virtually impossible to analyze a bit stream with an oscilloscope, a signature analyzer is used to compress the  
bit stream into a four-character signature that is unique for each node. By comparing signatures of the unit under test to the  
correct signatures for each node, faults can usually be isolated to one or two components. Note that signature analysis  
provides only go/no-go information; the signature provides absolutely no diagnostic information.  
The following general notes apply to signature analysis of the power supply.  
1. Be certain to use the correct setup for the signature being examined.  
2. Most signatures are taken on the GPIB, and front panel assemblies.  
3. Note the signatures for Vcc and ground on the I.C. being examined. If an incorrect signature is the same as that of Vcc  
or ground, that point is probably shorted to Vcc or ground.  
4. If two pins have identical signatures, they are probably shorted together. If two signatures are similar, it is only  
coincidence. For example, if the signature at a certain point should be 65C4, a signature of 65C3 is not "almost right".  
No diagnostic information can be inferred from an incorrect signature.  
5. If a signature is incorrect at an input pin, but is correct at its source (output of previous I.C.), check for printed circuit  
and soldering discontinuity.  
6. An incorrect signature at an output could be caused by a faulty component producing that output; or, a short circuit in  
another component or on the board could be loading down that node.  
Tables 3-2 and 3-3 show the primary, front panel, and secondary signature analyzer connections that are required to perform  
the SA tests in Tables 3-4 through 3-8. Remember that the primary and secondary circuits each reference a different circuit  
common.  
Primary SA  
Place the unit in primary SA mode by moving the J5 jumper as shown in Table 3-2. Connect the signature analyzer as  
shown in the table. The front panel display should indicate: ''SA SA", and all LED's will be on. If the display is different,  
replace U14.  
Note:  
The power supply will not go into SA mode if one of the data and address lines is shorted either high or  
low. Refer to Data Lines troubleshooting.  
When the unit is in SA mode, check for the waveforms shown in Figure 3-3. Refer to Table 3-4 for the primary SA  
signatures. Return the J5 jumper to its normal position when the primary signature analysis is complete.  
Front Panel SA  
To place the unit in SA mode for Front Panel SA troubleshooting, follow the procedure for Primary SA troubleshooting.  
When the unit is in SA mode, check the signatures in Tables 3-5 through 3-7.  
The signatures in Table 3-5 check the registers that drive the 7-segment LED displays. Most problems will involve only one  
display or LED indicator. Table 3-6 checks the address latches and decoders. Address latch U15 forwards address data to  
the address decoders, which enable the shift registers. Table 3-7 checks flip-flop U12, shift register U11, and gate U18. U12  
decodes the output of the RPG. U11 and U18 are used by the microprocessor to read the status of the RPG and front panel  
switches.  
45  
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Return the J5 jumper to its normal position when the front panel signature analysis is complete.  
Secondary SA  
For secondary SA troubleshooting, connect the signature analyzer as shown in Table 3-3. Use a jumper wire and short U4  
pin 21 to common (U4 pin 20). Check for the waveforms in Figure 3-4 and the signatures in Table 3-8 for the secondary  
SA. When the secondary signature analysis is complete, disconnect the jumper on U4 pin 21.  
Table 3-2. Primary and Front Panel Signature Analyzer Test Setups  
SIGNATURE  
ANALYZER INPUT  
CLOCK  
EDGE  
SETTING  
PRIMARY SA  
CONNECTIONS  
A8J5 pin 8  
START  
STOP  
GROUND  
A8U37 pin 16  
A8U37 pin 16  
A8J5 pin 5  
A8J5 (in SA mode)  
A8J5 JUMPER POSITIONS  
Jumpering pins 1 and 2 skips the internal  
selftest when the unit is turned on.  
Jumpering pins 3 and 4 places U37 in SA mode.  
Jumpering pins 5 and 6 is the normal/operating  
position of the jumper.  
Table 3-3. Secondary Signature Analyzer Test Setups  
SIGNATURE  
ANALYZER INPUT  
CLOCK  
EDGE  
SETTING  
SECONDARY SA  
CONNECTIONS  
A8U4 pin 23  
A8U4 pin 22  
A8U4 pin 22  
A8U4 pin 20  
START  
STOP  
GROUND  
A8U4 JUMPER POSITIONS  
Use a jumper wire and connect A8U4 pin 21 to pin 20 (ground).  
Use a 40-pin test clip (Pomona Model 5240 or eq.) to facilitate test  
connections to A8U4.  
46  
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Table 3-4. Primary Processor Signature Table  
(A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A.00.04)  
A.00.04  
A46A  
4148  
A.00.02 A.00.01  
A.00.00  
A46A  
UH8O  
4FU1  
86C2  
5A37  
PHHO  
3F6U  
HFP3  
17AF  
62H1  
OOU3  
6OA3  
7826  
A(0)  
A(1)  
A(2)  
A(3)  
A(4)  
A(5)  
A(6)  
A(7)  
A46A  
UH8O  
82H5  
9899  
A46A  
UH8O  
UO39  
HOPF  
O7FA  
5823  
U16-12  
U16-13  
U16-14  
U16-15  
U16-16  
U16-17  
U16-18  
U16-19  
U6-12  
U6-11  
U6-10  
U6-9  
U6-8  
U6-7  
U8-12 U12-11  
U8-11 U12-13  
U8-10 U12-9  
U17-21  
U17-22  
U17-23  
72F5  
PAU8  
A4A7  
45OP  
C3UU  
HOU4  
4U39  
45A8  
278A  
6OA3  
7826  
U8-9  
U8-8  
U12-10  
U12-8  
3088  
48H5  
UF3H  
HOU4  
4U39  
45A8  
278A  
6OA3  
7826  
U8-7  
U8-6  
U8-5  
2682  
U6-6  
U6-5  
U36-11  
U36-9  
U36-8  
U36-7  
U36-6  
U36-5  
U36-4  
U36-3  
U36-2  
U36-1  
F6OP  
17AF  
62H1  
OOU3  
6OA3  
7826  
A(8)  
A(9)  
U14-52  
U14-51  
U14-50  
U14-49  
U14-48  
U14-47  
U14-46  
U14-45  
U6-27  
U6-26  
U6-23  
U6-25  
U6-4  
U6-28  
U6-29  
U6-3  
U8-27  
U8-26  
U8-23  
U8-25  
U8-4  
U8-28  
U8-3  
U8-31  
A(10)  
A(11)  
A(12)  
A(13)  
A(14)  
A(15)  
5850  
F93H  
79UA  
5850  
5850  
585O  
F93H  
79UA  
F93H  
79UA  
F93H  
79UA  
D(0)  
D(1)  
D(2)  
D(3)  
D(4)  
D(5)  
D(6)  
D(7)  
PH2F  
HU9O  
U665  
53PP  
C9C2  
C27C  
HO18  
P97H  
48P2  
6O84  
74UH  
16A9  
196F  
132C  
4387  
4FC3  
48P2  
6O84  
96C5  
UH79  
AA13  
8A9F  
497F  
33AO  
48P2  
U14-60  
U14-59  
U14-58  
U14-57  
U14-56  
U14-55  
U14-54  
U14-53  
U16-9  
U16-8  
U16-7  
U16-6  
U16-5  
U16-4  
U16-3  
U16-2  
U6-13  
U6-14  
U6-15  
U6-17  
U6-18  
U6-19  
U6-20  
U6-21  
U8-13 U12-22  
U8-14 U12-21  
U8-15 U12-20  
U8-17 U12-19  
U8-18 U12-18  
U8-19 U12-17  
U8-20 U12-16  
U8-21 U12-15  
U17-12  
U17-13  
U17-14  
U17-15  
U17-16  
U17-17  
U17-18  
U17-19  
6O84  
HA6P  
8OC2  
U64C  
89AP  
2C5F  
U44P  
WR*  
RD*  
ALE  
READY  
FP65  
unstable 3PPH  
U665  
26C3  
FP65  
FP65  
3PPH  
4OAP  
26C3  
FP65  
3PPH  
4OAP  
26C3  
U14-40  
U14-61  
U14-62  
U14-43  
U8-29  
U8-24  
U36-12  
U36-13  
U6-24  
4OAP  
26C3  
U16-11  
U36-15  
U36-14  
BANK_SEL unstable 5AHH  
unstable  
unstable U14-27  
EE(0)  
EE(1)  
EE(2)  
EE(3)  
7CF1  
AH32  
HCCH  
9P5F  
7CF1  
AH32  
HCCH  
9P5F  
7CF1  
AH32  
HCCH  
9P5F  
7CF1  
AH32  
HCCH  
9P5F  
U14-19  
U14-20  
U14-21  
U14-22  
U70-1  
U70-2  
U70-3  
U704  
APC  
9361  
CHU5  
2688  
C95F  
9UPU  
9361  
CHU5  
2688  
C95F  
9UPU  
9361  
CHU5  
2688  
C95F  
9UPU  
9361  
CHU5  
2688  
C95F  
9UPU  
U14-23  
U15-22  
U17-8  
UART  
GPIB  
ROM  
RAM  
U12-14 U36-16  
U36-17  
U6-22  
U36-19  
U36-18  
U8-22  
47  
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Table 3-5. Front Panel LED Display and Indicator Drivers  
(A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A00.04 Inputs)  
Inputs:  
Node  
Measurement  
U1 to U10-1  
U1 to U10-9  
U1 to U10-2,14  
U1 to U10-7  
U1-8  
6H15  
Cycle power to unit--Lo to Hi after approx. 160 ms  
+5V  
common  
F05U  
50A9  
6F42  
U2-8  
U3-8  
U4-8  
U5-8  
U6-8  
U7-8  
AH52  
51U7  
PHFF  
5730  
U8-8  
U9-8  
U10-8  
8U73  
HU9C  
5AHH  
Outputs:  
Current Display  
Voltage Display  
$KKKKKKK%KKKKKKKKK& $KKKKKKK%KKKKKKKKK&  
U1  
U2  
U3  
U4  
U5  
U6  
U7  
U8  
U9  
U10  
pin 3  
pin 4  
pin 5  
pin 6  
pin 10  
pin 11  
pin 12  
pin 13  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
102A  
92FF  
4FUC  
94F0  
102A  
92FF  
4FUC  
94F0  
4A3F  
C665  
5526  
C4A9  
A73P  
PFP6  
163C  
lAP8  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
4U91  
31U5  
739H  
5724  
4U91  
31U5  
739H  
5724  
7499  
4475  
P7AH  
OUC4  
1467  
U810  
HA84  
C4HC  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
5AHH  
CHP5  
P3PP  
H8HC 0000  
84PU 0000  
5UAU 0000  
U7A8  
A60U  
56PA  
0000  
0000  
0000  
0000  
0000  
48  
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Table 3-6. Front Panel Address Latches and Decoders  
(A8U6 = P/N 5080-2160 REV A.00.00, A.00.01, A.00.02 and A.00.04 Inputs)  
Inputs:  
Node  
U14-26  
U14-35  
U14-38  
Measurements  
Toggling (unstable)  
37F8  
1ABC  
U15-9, U17-3,6  
U17-4,5  
Cycle power to unit--Lo to Hi after approx. 160 ms  
Cycle power to unit--Hi to Lo after approx. 160 ms  
Outputs:  
U13-1, U14-1, U15-3  
U13-2, U14-2, U15-4  
U13-3, U14-3, U15-5  
U13-4, U14-4, U17-11  
U13-5, U16-3  
U13-6, U14-6, U17-9  
U13-7  
U13-9  
U13-10  
U13-11  
U13-12  
969U  
C7AA  
A372  
Toggling  
5C91  
1ABC  
8U73  
5730  
PHFF  
51U7  
AH52  
6F42  
U14-5, U16-6  
U14-13  
U14-14  
U14-15  
U15-1, U17-2  
U15-2  
F615  
U16-5, U17-12  
U16-12, U17-8  
U16-13, U17-10  
U17-1  
9C3C  
4056  
Toggling  
37F8  
Toggling  
5AHH  
HU9C  
6H15  
U17-2  
+5V  
U15-3  
U15-6, U16-2, U17-3  
U15-8, U16-11  
U15-10, U16-1,4,10  
FlP6  
P62F  
9H84  
U13-13  
U13-14  
U13-15  
50A9  
F05U  
49  
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Table 3-7. Front Panel RPG Latches and Input Port  
(A8U6 = P/N 5080-2160 REV A.00.00, A.00.01 A.00.02, and A.00.04)  
Inputs:  
Node  
U11-1  
Measurement  
1ABC  
U11-2 U12-4,10  
U16-10  
Toggling (unstable)  
9H84  
Procedure:  
Node  
S1 LCL  
S1 LCL  
released  
depressed  
U11-13 Lo  
U11-13 Hi  
U11-7, U16-9  
U11-7, U16-8,9  
Lo  
Toggling  
U16-8 Hi  
U16-8 Hi  
U16-8 Hi  
U16-8 Hi  
U16-8 Hi  
S2 OUTPUT ADJUST  
S2 OUTPUT ADJUST  
released  
depressed  
U11-14 Lo  
U11-14 Hi  
U11-7, U16-9  
U11-7, U16-8,9  
Lo  
Toggling  
S3 DISPLAY OVP  
S3 DISPLAY OVP  
released  
depressed  
U11-3 Lo  
U11-3 Hi  
U11-7, U16-9  
U11-7, U16-8,9  
Lo  
Toggling  
S4 DISPLAY SETTINGS  
S4 DISPLAY SETTINGS  
released  
depressed  
U11-4 Lo  
U11-4 Hi  
U11-7, U16-9  
U11-7, U16-8,9  
Lo  
Toggling  
S5 FOLDBACK  
S5 FOLDBACK  
released  
depressed  
U11-5 Lo  
U11-5 Hi  
U11-7, U16-9  
U11-7, U16-8,9  
Lo  
Toggling  
U12-5  
U12-9  
Node toggles when RPG is rotated clockwise  
Node toggles when RPG is rotated in either direction  
Set scope for dual trace operation, 2V/div, 10 ms/div, normal triggering, and positive edge on channel A.  
Connect channel A to U12-3 and channel B to U12-2.  
U12-3  
Rotate RPG CW  
U12-2  
U12-3  
U12-2  
Rotate RPG CW  
Rotate RPG CCW  
Rotate RPG CCW  
50  
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Table 3-8. Secondary Processor Signature Table  
DS(0)  
DS(1)  
DS(2)  
DS(3)  
DS(4)  
DS(5)  
DS(6)  
DS(7)  
DS(8)  
DS(9)  
DS(10)  
DS(11)  
P36U  
2280  
4277  
720F  
6A31  
662U  
6020  
6327  
1377  
FF99  
236P  
H495  
U4-1  
U4-2  
U4-3  
U4-4  
U4-5  
U4-6  
U4-7  
U4-8  
U4-39  
U4-38  
U4-37  
U4-36  
U7-15  
U7-14  
U7-13  
U7-12  
U7-11  
U7-10  
U7-9  
U7-8  
U7-7  
U7-6  
U7-5  
U9-15  
U9-14  
U9-13  
U9-12  
U9-11  
U9-10  
U9-9  
U9-8  
U9-7  
U9-6  
U9-5  
U11-15  
U11-14  
U11-13  
U11-12  
U11-11  
U11-10  
U11-9  
U11-8  
U11-7  
U11-6  
U11-5  
U11-4  
U2-16  
U2-17  
U2-18  
U2-19  
U7-4  
U9-4  
WR*  
WR*  
WR*  
9FU7  
9FF7  
9FHU  
F817  
36U7  
0562  
9F97  
9FH6  
9FH5  
0000  
AU68  
9FA8  
U4-12  
U4-13  
U4-14  
U4-26  
U4-27  
U4-28  
U4-11  
U4-17  
U4-16  
U4-30  
U4-35  
U4-33,34  
U7-17  
U9-17  
U11-17  
U20-1  
U20-16  
U20-15  
ISTX  
U2-4, 14  
U2-2  
U2-11  
U2-1  
ALE  
+ 5V  
Power Section Troubleshooting  
Table 3-9 describes the signals at each of the control board test points. The test connector provided in service kit P/N  
5060-2865 allows easy connection to each test point. The measurements given here include bias and reference voltages as  
well as power supply status signals. It provides conditions for these measurements and gives the components which are the  
sources of the signals. Tables 3-10 and 3-11 describe possible symptoms in the power section. Both give lists of circuit  
blocks or components which can cause the symptoms shown. The appropriate assembly is also given.  
If the supply exhibits a symptom given in Table 3-10 or 3-11, go to the block which pertains to that symptom. If the exact  
symptom seen is not in the tables, start with the symptom that seems to be closest to the one observed. The blocks are given  
in the Power Section Blocks section starting in Paragraph 3-84. Troubleshooting information for each block will include a  
brief description of the circuit. The columns provided are as follows:  
NODE:  
This column lists the nodes where the measurements should be taken. In some cases this will be  
stated as NODE( + ) and NODE(-) where the first is the test node and the second is the reference.  
SETUP:  
If a certain setup is required for the measurement, it will be given in this column.  
MEASUREMENT: This column indicates what the expected measurement is for the given node.  
SOURCE:  
If applicable, the components which generate the signal will be provided in this column.  
51  
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The A4 FET Board should only be raised on an extender when using the main troubleshooting setup.  
NEVER use a FET Board extender when the unit is operated with its normal ( ≈ 320Vdc) bus voltage. To  
do so is a personal shock hazard and can damage the power supply.  
To troubleshoot the power supply the A4 power FET board and A2 control board can be raised out of the unit using  
extender boards and cables provided in service kit P/N 5060-2865.  
Main Troubleshooting Setup  
Figure 3-5 shows the troubleshooting setup for troubleshooting all of the unit except the front panel and initial no-output  
failures (see Paragraph 3-82). The external power supply provides the unit's internal bus voltage. The ac mains connects  
directly to the unit's A1T3 bias transformer via the isolation transformer, thereby energizing the bias supplies, but it does not  
connect to the input rectifier and filter to create the bus voltage. With the external supply the unit operates as a dc-to-dc  
converter. The supply biases A4Q1, A4Q2, A4Q3, and A4Q4 PFETs with a low voltage rather than the 320Vdc bus  
voltage. This protects the PFETs from failure from excess power dissipation if the power-limit comparator or the off-pulse  
circuitry are defective. It also reduces the possibility of electrical shock to the troubleshooter.  
Figure 3 5. Main Troubleshooting Setup  
52  
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An isolation transformer provides ac voltage that is not referenced to earth ground, thereby reducing the  
possibility of accidentally touching two points having high ac potential between them. Failure to use an  
isolation transformer as shown in Figure 3-5 will cause the ac mains voltage to be connected directly to  
many components and circuits within the power supply, including the FET heatsinks, as well as to the  
terminals of the external dc power supply. Failure to use an isolation transformer is a definite personal-  
injury hazard.  
The troubleshooting setup of Figure 3-5 connects high ac voltage to relay K1, fan B1, fuseholder A1F1, and  
other components and circuits along the front of the A1 main board.  
As a convenience in implementing the troubleshooting setup, modify a spare mains cord set as shown in Figure 3-6. This  
facilitates connecting the unit's power receptacle to the external supply and connecting the bias transformer to the ac mains.  
With the mains cord unplugged proceed as follows:  
a. Remove the top cover and the inside cover per Page 35. Remove fuse A1F1.  
Failure to remove fuse AlF1 will result in damage to the power supply, damage to the external dc supply,  
and is an electrical shock hazard to you.  
a. Install control board test connector onto the A2J7 card-edge fingers.  
b. Connect a 50Ω 10-W load resistor to the unit's output terminals.  
c. The external dc power supply can be connected to the unit in either of two ways (in either case, the front panel LINE  
switch should be off):  
1.  
Remove white/gray wire from main board terminal marked "N'' (at left side, just behind relay at front left  
corner), and remove white/brown, gray wire from terminal "L". Connect external dc power supply to terminals  
"N" and "L''. Either polarity is correct.  
OR  
2.  
Ensure that the rear-panel circuit breaker is on. Connect external dc power supply to ac input terminals ''N"  
and ''L''. Either polarity is correct.  
e. Complete the setup of Figure 3-5 by attaching an ac mains cord to test points J8 (L, black wire) and J7 (N, white wire)  
and connect the green ground wire to the unit's case ground terminal or a suitably grounded cabinet screw. Connect the  
mains cord to an isolation transformer.  
Troubleshooting No-Output Failures  
No-output failures often include failure of the A4Q1, A4Q2, A4Q3, and A4Q4 PFETs and their fuses A4F1 and A4F2.  
When either the off-pulses or the power-limit comparator fails, the PFETs can fail from excessive power dissipation. The  
strategy for localizing no-output failures is to check the voltages and waveforms at the control board test connector to  
predict if that circuit failure would cause the FETs to fail. This makes it possible to develop your troubleshooting approach  
without an extensive equipment setup. Proceed as follows:  
a. With the mains cord disconnected remove the A4 FET board per Page 36. Connect the mains cord and switch on  
power.  
b. Using Table 3-9 check the bias voltages, the PWM-OFF and PWM-ON Control signals and other signals of interest at  
the A2 control board test fingers, A2J7.  
c. Check for the presence of program voltages, VP and IP, at the rear panel.  
d. Check for presence of the 320Vdc rail voltage with + at the rear facing end of AlR3 and - at the rear facing end of  
AlR1. If there is no rail voltage, check AlU1.  
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AlR1, AlR3, and AlU1 connect to the ac mains voltage. Use a voltmeter with both input terminals floating  
to measure the rail voltage.  
a. Select the functional circuit for troubleshooting based on your measurements and Table 3-11, which provides direction  
based on the status of the PWM OFF and PWM ON signals.  
Figure 3-6. Modified Mains Cord Set For Troubleshooting  
Power Section Blocks  
This section contains the blocks referenced in Tables 3-10 and 3-11.  
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Table 3-9. Control Board Test Connector, A2J7  
PIN NO.  
SIGNAL NAME  
Vdc  
WAVEFORM/CONDITIONS  
SOURCE  
Digital-Circuits Bias & Reference Voltages  
24  
22  
14  
6
+5V  
5.0  
A2Q9 (emitter)  
AlCR6, AlCR7  
A2U7 (OUT)  
+ 20V(5V UNREG)  
2.5V ref  
0.5V ref  
20.0  
2.50  
0.50  
with 120Hz & 45KHz ripple  
A2R24,A2R84, A2R85  
Analog-Circuits Bias Voltages  
2
21  
+ 15V  
-15V  
15.0  
-15.0  
A2U11 (OUT)  
A2U12 (OUT )  
Status Signals  
17  
16  
13  
11  
TTL Lo  
TTL Lo  
TTL Hi  
TTL Hi  
if in CV operation  
if in CC operation  
if not OVP shutdown  
if ac mains okay  
A2Q2 (collector)  
A2Q1 (collector)  
A2U15-13  
CV  
CC  
OV  
A2U15-10  
AC FAULT  
12  
TTL Hi  
if not overtemp shutdown  
A4TS1,A5TS1  
OT  
Control Signals  
25  
26  
18  
PWM OFF  
PWM ON  
Ip MONITOR  
A2U16-5  
A2U15-1  
A2CR27 (cathode)  
10µs TTL pulses, 20KHz  
1.7µs TTL pulses, 20KHz  
1V pk, ½ sawtooth, 20KHz  
(at full power only)  
8
TTL Hi  
1.2-3.0  
if not remotely inhibited  
A2U18-9  
INHIBIT  
15  
while not down programming  
A2CR17, CR31(anode)  
DOWN PROGRAM  
7
OVP PROGRAM  
1/100 OVP (6030A)  
1/10 OVP (6031A)  
1/30 OVP (6032A)  
1/250 OVP (6035A)  
+5V  
e.g.: 2 Vdc if OVP set to full  
voltage output  
A3R72 (wiper)  
5
inverted OV reset line  
if +5V bias OK  
A8U4-35  
A2Q11-4  
OV CLEAR  
PCLR  
19  
+5V  
Commons & Current-Monitor  
4
COMMON  
0.0  
return for all bias voltages,  
status and control signals  
return for 2.5V and 0.5V ref  
inboard-side monitoring res  
9
10  
COMMON  
I-TEST  
0.0  
A1R11,A1T2  
(AlR13 (6032A))  
≈0.013*I0UT(6030A/35A).  
≈0.0017* IOUT (6031A)  
≈0.0037* IOUT (6032A)  
V-OUT/4 (6031A)  
V-OUT/12 (6032A)  
V-OUT/40 (6030A)  
V-OUT/100 (6035A)  
≈0.9  
3
V-MON-BUF  
Ip-SET  
buffered V-MON for readback  
A8U25-6  
20  
A2R25 wiper  
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Table 3-10. Performance Failure Symptoms  
DEFECTIVE  
SYMPTOMS  
unexplained OVP shutdowns  
no current limit  
BOARD  
A2  
CHECK FUNCTIONAL CIRCUITS  
OVP circuit, CV circuit  
A2  
CC circuit  
max current < specified  
max power < specified  
max voltage < specified  
cycles on & off randomly  
A2  
CC Clamp, CC circuit  
A2, A1  
A2, A1  
A2, A1  
Power Limit, 20KHz clock, transformer AlT1  
CV Circuit, diodes A1CR1-CR4  
AC-Surge-&-Dropout Detector, Mains Voltage  
Select switch A1S2  
CV overshoots  
A2  
A2U5A, A2CR19, A2R62  
output noise (<1KHz)  
output noise (>1KHz)  
A2,A1  
A1, A4  
CV circuit, input filter  
transformer AlT2, Output Filter, snubbers A4R1 to  
A4R11, A4R13 to A4R19, A4C1 to A4C4, A4CR2,  
A4CR3, A2R15, A2C2  
CV regulation, transient  
response, programming time  
CC regulation  
CV oscillates with capacitive  
loads  
A2, A1  
wrong sensing  
low ac mains voltage, CV circuit  
low ac mains voltage, CC circuit  
A2R61, A2R60, A2R58, A2R59, A2C33, A2R64,  
A2R68, A2C36, A2C37, A2U5, A2R65  
A2R61, A2R60, A2R58, A2R57, A2C33, A2R19  
A2C11, A2R28, A2C12, A2U4, A2R35, A2C20,  
A2U4, A2R37, A2C17, A2R29, A2C18, A2R31  
A2  
A2  
CC oscillates with inductive  
loads  
A2  
Table 3-11. No-Output Failures  
(Bias supplies and AC turn-on circuit functioning)  
Status of FET On/Off-Pulses  
PWM-ON  
A2J7-26  
PWM-OFF  
A2J7-25  
DEFECTIVE  
BOARD  
A2  
CHECK FUNCTIONAL CIRCUITS  
Lo  
Lo  
Hi  
Hi  
Lo  
Hi  
Lo  
Hi  
Control ckts: CV & CC thru On- & Off-Pulse Oneshots *  
PWM and DC-to-DC Converter: A4 PFETS probably failed  
PWM and DC-to-DC Converter: A4 PFETS probably failed  
PWM and DC-to-DC Converter: A4 PFETS probably failed  
A2U15A, On-Pulse Oneshot and Q11  
A2&A4  
A2&A4  
A2&A4  
A2  
Lo  
N
N
Hi  
N
N
Lo  
N
Hi  
N
A2&A4  
A2&A4  
A2&A4  
A2&A4  
Off-Pulse Oneshot and DC-to-DC: A4 PFETS probably failed  
A2U15A, On-Pulse Oneshot & DC-to-DC: A4 PFETS probably failed  
Off-Pulse Oneshot and DC-to-DC: A4 PFETS probably failed  
Power-Limit Comparator and DC-to-DC: A4 PFETS probably failed  
Lo= TTL low  
Hi= TTL high  
N= normal 20KHz pulse train, TTL levels  
* Decide which to troubleshoot--the CV circuit, the CC circuit, or the PWM and Off-Pulse & On-Pulse Oneshots-- by  
measuring the CV CONTROL (A2CR24, cathode) and the CC CONTROL (A2CR11 cathode) voltages. Troubleshoot  
whichever is negative, and if neither is negative, troubleshoot the PWM. Make these voltage measurements after you  
have implemented the Main Troubleshooting Setup.  
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Troubleshooting AC-Turn-On Circuits  
Relay AlK1 closes at 2.5 seconds and AC FAULT goes high at 2.9 seconds after 21V UNREG reaches about 13Vdc.  
AC FAULT high enables the PWM if OVERVOLTAGE , INHIBIT, and OVERTEMP are also high.  
Circuits Included. High AC and AC Dropout Detectors, Bias Voltage Detector, Q11A, 3-Second Delay and Relay Driver--  
all on A2 control board.  
Setup. The Main Troubleshooting Setup, Page 53. Apply the ac mains voltage to the isolation transformer, and set the  
external supply to 0Vdc.  
Inputs:  
NODE (+) *  
A2J7-24  
A2J7-22  
A2Q11-16  
A2U20-13  
SETUP  
MEASUREMENT  
5.0Vdc  
≈ 21Vdc  
f.w.rect,0.8V pk  
TTL sq wave,20KHz  
SOURCE  
A209 (emit.)  
A1CR2,A1CR5  
A1CR3,A1CR4  
A2U20-6  
Outputs:  
NODE (+) *  
A2U17-9  
A2U17-14  
A2Q11-14  
A2Q11-4  
A2U9-10  
A2U9-15  
A2U9-14  
A2U9-1  
SETUP  
MEASUREMENT  
≈ 13.5Vdc  
≈ 1.4Vdc  
transition 0 to 5Vdc at 25 sec  
Hi (5Vdc)  
2.9 s burst 1.25KHz sq. wave  
one 840ms pulse then Hi at 2.5 sec  
three 420 ms pulses then Hi at 2.9 sec  
transition Lo to Hi at 1.7 s  
transition Lo to Hi at 2.9 s  
cycle power  
cycle power  
cycle power  
cycle power  
cycle power  
cycle power  
cycle power  
cycle power  
A2U15-10  
( AC FAULT )  
A2Q7-C  
cycle power  
transition 5.0 to 0.3Vdc at 2.5 sec  
RELAY ENABLE  
*Node( - ) = A2J7-4  
Troubleshooting DC-To-DC Converter  
Parallel NOR gates A4U1, A4U2 and A4U3A act as drivers and switch on FETs A4Q1,Q2,Q3 and Q4 through pulse  
transformer A4T1. NOR gate A4U3B turns off the FETs through pulse transformer A4T2 and transistors A4Q5 and A4Q6.  
Circuits Included. On-Pulse Driver, Off-Pulse Driver, FET Switches and Drivers on A4 FET board.  
Setup. The Main Troubleshooting Setup, Paragraph 3-40. Apply the ac mains voltage to the isolation transformer, set the  
external supply to 40Vdc, and switch on the LINE switch. Set the unit's output voltage to 20Vdc and current to above 1Adc.  
Using the DISPLAY SETTINGS switch. Verify that the OVERRANGE LED lights. See Figure 3-7 for waveforms.  
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Inputs:  
NODE (+)  
NODE (-)  
MEASUREMENT  
SOURCE  
A2J7-26(PWM-ON)  
A2J7-25(PWM-OFF)  
M
M
A2Ul5-l,A2J5 11, A4P1-A3  
A2U16-5,A2J5-13,A4P1-A2  
1.7µs, 20KHz pulse(see Waveform #1)  
10µs, 20KHz pulse(see Waveform #2)  
NODE (+)  
A4P1-C1  
A4Q2-D  
NODE (-)  
A4P1-A1  
A4Q4-S  
MEASUREMENT  
10.6Vdc  
39Vdc  
SOURCE  
AlU3-2  
A1C51 ( + ),A4P1-22 to 25  
A1Cl( - ),A4P1-16 to 18  
Outputs:  
NODE (+)  
A4Q1/Q2-G  
A4Q3/Q4-G  
A4Q2-S  
NODE (-)  
MEASUREMENT  
(see Waveform #3)  
(see Waveform #3)  
(see Waveform #4)  
(see Waveform #5)  
A4Q2-S  
A4Q4-S  
A4Q4-D  
A2J7-4  
A2J7-18  
If you replace the FETs, replace both the FETs and associated drive components as furnished in FET Service Kit. Agilent  
Part No. 5060-2866.  
The FETs are static sensitive and can be destroyed by relatively low levels of electrostatic voltage.  
Handle the A4 FET board and the FETs only after you, your work surface and your equipment are  
properly grounded with appropriate resistive grounding straps. Avoid touching the FET's gate and  
source pins.  
Troubleshooting Bias Supplies  
+5V On A2 Control Board. The PWM A2U22 includes a clock generator (40KHz set by A2R170, A2C79 and A2Q10),  
and a current limit (2Adc set by 0.15Vdc across A2R172). It turns off each output pulse using the difference between the  
voltage at voltage divider A2R161-A2R163 and the 2.5Vdc set by voltage regulator A2U21.  
Circuit Included. +5Vdc bias supply circuitry from connector pins A2J5-1,3 through jumper A2W3 on A2 control board.  
Setup. The Main Troubleshooting Setup, Page 53. Apply the ac mains voltage to the voltage transformer, and set the  
external supply to 0Vdc.  
Input:  
NODE (+)  
NODE (-)  
MEASUREMENT  
SOURCE  
A2J7-22  
A2J7-4  
A1CR2,A1CR5  
≈ 21Vdc  
Outputs:  
NODE ( + )  
A2U22-7  
A2U22-12,13  
A2Q9 (emit)  
A2U21-2  
NODE (-)  
A2J7-4  
"
"
"
"
MEASUREMENT  
≈2 to 4Vdc sawtooth, 40KHz  
≈ 19V pk, 15µs pulses, 40KHz  
≈ 20V pk, 5µs pulses, 40KHz  
2.5 Vdc  
A2R161, A2R163  
2.5 Vdc  
To check if load on + 5V is shorted, remove jumper A2W3  
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Figure 3-7. Waveforms  
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+15V On A2 Control Board. Voltage regulator A2U11 regulates the voltage across resistor A2R99 to be 1.25Vdc. That  
sets the current through zener diode A2VR3 at 7.5mAdc. The output voltage is 1.25Vdc plus 11.7Vdc across A2VR3 plus  
the voltage across A2R100.  
Circuit Included. +15Vdc bias supply circuitry from connector pin A2J5-5 through test point A2J7-2 on A2 control board.  
Setup. The Main Troubleshooting Setup, Page 53. Apply the ac mains voltage to the isolation transformer, and set the  
external supply to 0Vdc.  
Input:  
NODE (+)  
NODE (-)  
MEASUREMENT  
SOURCE  
A2C52 (+)  
A2C52 (-)  
A1U4  
≈ + 25Vdc  
Outputs:  
NODE ( + )  
A2J7-2  
A2J7-2  
A2J7-2  
A2C50( + )  
NODE (-)  
MEASUREMENT  
A2U11-3 (ADJ)  
A2VR3 (anode)  
A2VR3 (anode)  
A2C50( - )  
l.25Vdc  
12.9Vdc  
6.2Vdc  
13.8Vdc  
To check if load on +15V is shorted, remove jumper A2W1.  
-15 V On A2 Control Board. Voltage regulator A2U12 regulates the voltage across resistor A2R103 to be 1.25Vdc.  
Circuit Included. -15 Vdc bias supply circuitry from connector pin A2J5-6 through test point A2J7-21 on A2 control  
board.  
Setup. The Main Troubleshooting Setup, Page 53. Apply the ac mains voltage to the isolation transformer, and set the  
external supply to 0Vdc.  
Input:  
NODE (+)  
NODE (-)  
MEASUREMENT  
SOURCE  
A2C55 (+)  
A2C55 (-)  
A1U4  
≈ - 25Vdc  
Outputs:  
NODE ( + )  
A2J7-21  
A2J7-21  
A2C54( + )  
NODE (-)  
MEASUREMENT  
A2U12-3 (ADJ)  
A2VR4 (cath)  
A2C54( - )  
- l.25Vdc  
- 12.9Vdc  
13.8Vdc  
To check if load on -15V is shorted, remove jumper A2W2.  
Refer to Down Programmer, for the + 10.6Vdc bias supply, and refer to OVP Circuit, for the + 2.5V bias supply.  
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Troubleshooting Down Programmer  
The down programmer discharges the output when either PWM OFF is generated or CV ERROR is more negative than  
about - 3Vdc. Comparator A5U1 triggers down programming when the voltage at A5U1-5 is less than about 4Vdc.  
Circuit Included. Down programmer and 10.6V bias supply on A1 main board.  
Setup. The Main Troubleshooting Setup, Page 53, except connect the external supply to the unit's + OUT ( + ) and - OUT (  
- ) terminals. Apply the ac mains voltage to the isolation transformer. Set the external supply for an output voltage of 10Vdc  
and set current limit for 2.5 Amps. Set the power supply under test for a voltage setting of 8.0Vdc and current setting of  
2.0Adc using the ''DISPLAY SETTING" switch.  
Outputs:  
NODE ( + ) *  
EXTERNAL SUPPLY MEASUREMENT  
A5C1 ( + ) C3(6031A)  
A5VR1(K)  
A5U1-3  
A5CR1( K ) CR2(6031A)  
A5CR1( K ) CR2(6031A)  
A5U1-1  
ON/OFF  
ON/OFF  
ON/OFF  
OFF  
ON  
OFF  
10Vdc  
6.5Vdc  
0.2Vdc  
0.6Vdc  
0.2Vdc  
0.5Vdc  
A5U1-1  
ON  
5.0Vdc  
A5R20 + (6030A/35)  
A5R20 + (6030A/35)  
across A5R1(6031A)  
across A5R1(6031A)  
across A5R14(6032A)  
across A5R14(6032A)  
OFF  
ON  
OFF  
ON  
OFF  
ON  
< 0.001Vdc  
1.5Vdc  
< 0.001Vdc  
0.10Vdc  
< 0.001Vdc  
0.17Vdc  
* NODE (-) = A2J7-4  
Troubleshooting CV Circuit  
V-MON, the output of CV Monitor Amp A2U2. is 1/40 (6030A); 1/4 (6031A); 1/12 (6032A); l/l00 (6035A) the voltage  
between + S and - S. CV Error Amp A2U3 compares V-MON to CV PROGRAM. Innerloop Amp A2U5A stabilizes the  
CV loop with input from A2U5B. The measurements below verify that the operational amplifier circuits provide expected  
positive and negative dc voltage excursion when the CV loop is open and the power mesh shut down.  
Circuits Included. Constant Voltage (CV) Circuit and buffer amplifier A2U5B.  
Setup. The Main Troubleshooting Setup, Page 53. Apply the ac mains voltage to the isolation bias transformer, and  
disconnect the external supply. Remove the + S jumper and connect A2J7-2 ( +15V) to + S. Set mode switch settings B4,  
B5 and B6 all to 0. Set VP to 0Vdc by connecting to P or set VP to + 5Vdc by connecting to A2J7-24 according to SETUP  
below. VP and P are on rear-panel terminal block.  
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Outputs:  
NODE ( + )  
VM  
NODE (-)  
A2J7-4  
SETUP  
MEASUREMENT  
3.75Vdc  
A2U5-1  
A2U3-6  
A2U5-1  
A2U3-6  
A2U5-7  
"
"
"
"
"
VP = 0  
VP = 0  
VP = 5  
VP = 5  
-14Vdc  
-14Vdc  
4.7Vdc  
5.1Vdc  
short A2J7-24 to A2U5-5  
+ 7.5Vdc  
If the failure symptoms include output voltage oscillation, check if the CV Error Amp circuit is at fault by shorting A2U3-6  
to A2U3-2. If oscillations stop, the CV Error Amp circuit is probably at fault.  
Troubleshooting CC Circuit  
I-MON, the output of CC Monitor Amp A2U1, in volts is 5/17 (6030A); 1/24 (6031A); 1/10 (6032A); equals (6035A) the  
output current in amperes. CC Error Amp A2U4C compares l-MON to CC PROGRAM. Differentiator circuit A2U4A  
differentiates the inboard voltage sense and stabilizes the CC loop. Its output is summed with CC PROGRAM at CC Error  
Amp A2U4C.  
The measurements below verify that the operational amplifier circuits provide expected positive and negative dc voltage  
gain when the CC loop is open and the power mesh shut down.  
Circuits Included. Constant Current (CC) Circuit on A2 control board.  
Setup. The Main Troubleshooting Setup, Page 53, except connect the external supply with polarity reversed to the unit's +  
OUT ( - ) and - OUT ( + ) terminals. Apply the ac mains voltage to the isolation transformer. Set the external supply to  
3.0Adc constant current with a voltage limit in the range 5 to 20Vdc. Set IP to 0Vdc by connecting to P or set IP to +5Vdc  
by connecting to A2J7-24 according to SETUP below. Set mode switches B1, B2, and B3 AU to 0.  
Outputs:  
NODE ( + )  
IM  
NODE (-)  
A2J7-4  
SETUP  
MEASUREMENT  
0.88Vdc (6030A)  
0.125Vdc (6031A)  
0.30Vdc (6032A)  
1.00Vdc (6035A)  
-14Vdc  
A2U4-8  
A2U4-8  
"
"
IP = 0  
IP = 5  
+14Vdc  
If the failure symptoms include output current oscillation, check if the differentiator circuit is at fault by removing resistor  
A2R35. If oscillations stop, the differentiator is probably at fault.  
Troubleshooting OVP Circuit  
Flip-flop A2U8A-A2U8D is set by comparator A2U8C and reset by OV CLEAR. TTL low at A2U18-12 inhibits the PWM.  
OVP Program Voltage on A2J7-7 is equal to Eout/250 (6035A), Eout/100 (6030A), Eout/30 (6032A), Eout/10 (6031A).  
Circuit included. OVP Circuit and 2.5V bias supply on A2 control board.  
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Setup. The Main Troubleshooting Setup, Page 53, except connect the external supply to the unit's + OUT ( + ) and - OUT  
(-) terminals. Apply the ac mains voltage to the isolation transformer. Adjust the unit's OVP limit to 10Vdc. Set the external  
supply (EXTERNAL) as instructed below.  
Outputs:  
NODE ( - ) = A2J7-4  
SET VOLTAGE  
NODE ( + )  
A2U7-2  
A2J7-7  
EXTERNAL (Vdc)  
SETUP  
MEASUREMENT  
2.5Vdc  
-
-
0.1V (6030A)  
1.0V (6031A)  
0.33V (6032A)  
0.04V (6035A)  
4.5Vdc  
Hi  
Lo  
Lo  
Hi  
A2J7-5  
-
5
15  
5
A2J7-13  
A2J7-13  
A2J7-13  
A2J7-13  
5
cycle power  
Note:  
Connecting a test probe to either input of either comparator in the OV Flip Flop (pins A2U8-1, 6, 7,10,11  
or 13 ) may cause the flip flop to change states and cause the probed input to be low.  
Troubleshooting PWM & Clock  
The inputs to gates A2U18A and A2U18B are the keys to PWM troubleshooting. The 20KHz Clock starts each PWM  
output pulse, and the pulse stops when any of the inputs to A2U18A or A2U18B goes low. The PWM is inhibited and  
prevented from initiating output pulses as long as any of the seven inputs is low.  
Circuit Included. Pulse Width Modulator (PWM), Off-Pulse Oneshot, On-Pulse Oneshot, 20KHz Clock.  
Setup. The Main Troubleshooting Setup, Page 53. Apply the ac mains voltage to the isolation transformer. Adjust the unit's  
current setting above 1.0 Adc. Set the external supply (EXTERNAL) and adjust the unit's voltage setting (INTERNAL) as  
instructed below.  
Inputs:  
NODE ( - ) = A2J7-4  
NODE ( + )  
A2J7-24  
SETUP  
MEASUREMENT  
5.0Vdc  
Hi  
Hi  
Hi  
Hi  
Hi  
Hi  
Hi  
SOURCE  
A2Q9, A2W3  
Remote Inhibit  
A2U15-10  
A2U15-13  
A5TS1, A4TS1  
A2U18-8  
A2U18-9  
A2U18-10  
A2U18-12  
A2U18-13  
A2U18-5  
A2U18-2  
A2U18-1  
A2U8-2  
A2U10-7  
set OUTPUT  
ADJUST for 1Vdc  
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Outputs:  
SET VOLTAGE (Vdc)  
NODE ( + )  
A2U20-1  
A2U20-5  
A2U20-6  
A2U19-5  
A2U19-6  
A2U16-5  
A2U16-5  
A2U16-4  
A2U16-4  
A2U15-1  
A2U15-1  
+OUT  
EXTERNAL  
INTERNAL  
MEASUREMENT  
TTL sq wave, 320KHz  
TTL sq wave, 40KHz  
TTL sq wave, 20KHz  
20KHz  
20KHz  
10µs pulse, 20KHz  
Lo  
48µs pulse, 20KHz  
hi  
1.7µs pulse, 20KHz  
Lo  
≈ 40Vdc (6030A)  
≈ 8Vdc (6031A)  
≈ 14Vdc (6032A)  
≈ 80Vdc (6035A)  
0
0
0
0
0
40  
40  
40  
40  
40  
40  
40  
0
0
0
2
2
2
0
20  
0
20  
0
┐
│
├
│
┘
20  
OVERRANGE  
+OUT  
40  
2
2.0Vdc (CV)  
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4
Principles of Operation  
Introduction  
This chapter contains block diagrams, simplified schematics, and related descriptions of the power supply. The instrument  
can be thought of as comprising two major sections: the GPIB, microcomputer, and interface circuitry; and the power mesh  
and control circuits. Block diagrams represent the GPIB board, the front panel board, and the power mesh and control  
board. The descriptions associated with these block diagrams explain the function of each block without describing how  
individual components within the circuit accomplish that function. Detailed descriptions are provided only for those  
individual circuits whose operation may not be obvious to the user.  
The circuit names and layouts of the block diagrams are the same as used on the complete schematics; however, some items,  
such as bias supplies, are left off the block diagrams for clarity. In general, circuits are described as they appear on the  
diagrams from left to right. Signal names that appear on the drawings are printed in capitals in the descriptions, as are  
front-panel labels for indicators and controls. Signal names that describe an operating mode or condition are active when  
that condition exists. For example, OT is high and OT is low if an overtemperature condition exists. Signal flow is from left  
to right and top to bottom, unless arrows indicate otherwise.`  
The following paragraphs describe the GPIB and the front-panel board. These circuits provide the interface between the  
power mesh circuits and the controller and/or operator. The GPIB and front-panel boards are referenced to earth common.  
Isolation is achieved by optical isolators on the GPIB board. Data is sent between boards serially.  
GPIB Board  
Circuits on the GPIB board, see Figure 4-1, provide the interface between the power supply and the user, generate the  
fault/inhibit and relay controls signals (DFI/RI), and supply the analog control and reference signals for the power mesh and  
readback circuit. Two microprocessors (primary and secondary) control all data communication between the power supply  
and the user. Additional circuits on the GPIB board include the serial interface ports, address switches, an EEPROM, and  
status registers.  
Primary Microprocessor  
The primary microprocessor controls the GPIB/serial link interface, the front panel data communication, and the DFI/RI  
interface. It communicates with the secondary microprocessor through two serial link data lines that are optically coupled to  
provide the proper isolation of the user interface from the power mesh. The GPIB board also has a ROM, which contains  
the operating firmware, and a RAM, which stores variables such as programmed voltage and current and readback values.  
Address Switches  
The primary microprocessor determines the GPIB address by reading the address switch settings. Two of the address  
switches determine the power-on SRQ state and the DFI/RI port setting.  
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Figure 4-1. GPIB Block Diagram  
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EEPROM  
The primary microprocessor determines the power supply ID, start-up parameters, calibration constants and scale factors by  
reading the factory-initialized EEPROM.  
Isolation  
Two optical isolators transmit serial data between the primary and secondary microprocessors while maintaining electrical  
isolation between the controller/user-interface and the power mesh.  
Secondary Microprocessor  
The secondary microprocessor translates the serial data from the primary microprocessor into a parallel data bus and other  
control signals. Values are loaded into the voltage, current, and readback DAC via the data bus. The secondary  
microprocessor also controls the analog multiplexer, which is used when reading back the actual output.  
Digital-to-Analog Converters  
Output voltage and current are controlled by two 12-bit DACs whose digital inputs are directly connected to the secondary  
microprocessor. The microprocessor programs the DACs according to data received over the GPIB or from the front panel  
rotary pulse generator. The DAC circuits also include buffers and compensation amplifiers.  
The 12-bit readback DAC is connected to the input of a comparator where it's output is compared to the unknown voltage  
output of the analog multiplexer. The secondary microprocessor programs the output of the readback DAC starting with the  
MSB and continuing down to the LSB. Each bit is programmed either on or off until the output of the DAC is closest to the  
unknown voltage output of the multiplexer. At this point, the microprocessor returns the programmed value of the readback  
DAC.  
Analog Multiplexer  
The analog multiplexer selects one of five input voltages to be compared to the readback DAC. This comparison allows the  
microprocessor to determine the value of the input voltage. The five inputs of the multiplexer are: CV_PROG and  
CC_PROG, which are only used during selftest, at power-on, or in response to the TEST? query when the supply is  
disabled; OV_MON, which represents the overvoltage trip setting; and I_MON and V_MON, which represent the measured  
values of output current and voltage.  
Status Inputs  
The status inputs from the main board provide the following status information to the secondary microprocessor. They are:  
CC, which is set when the supply is operating in constant current mode; CV, which is set when the supply is in constant  
voltage mode; AC_FAULT, which signals that ac power has dropped below the minimum operating voltage of the supply;  
OT, which indicates an overtemperature condition has occurred on the supply; and OV, which indicates an overvoltage has  
occurred on the supply.  
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Front Panel Board  
The front-panel board, see Figure 4-2, contains the VOLTS and AMPS display circuits, the rotary pulse generator (RPG)  
and RPG decoders, five pushbutton switches, mode indicators, and the OVP ADJUST potentiometer. Data from the  
microprocessor is shifted to the display circuits via DATA DOWN , and data from the front-panel controls circuits is  
shifted to the microprocessor via DATA UP. Circuits on the front-panel board operate from bias voltages supplied from the  
GPIB board, and are referenced to the same common as the GPIB board (earth ground). The OVP ADJUST potentiometer  
is part of the power mesh control circuitry (referenced to power supply negative output), and is not connected to any circuits  
on the front-panel board.  
Address Latches and Decoders  
DATA DOWN bits received while D / A is low are latched and decoded in this circuit, which then steers clock pulses to  
the addressed circuit when D / A goes high.  
Volts and Amps Output Ports and Displays  
These circuits display values sent by the microprocessor via DATA DOWN. Normally, these are the actual output voltage  
and current readings. Pressing the DISPLAY SETTINGS switch causes the microprocessor to send the voltage and current  
values that have been sent by the controller (remote) or RPG (local). If the unit is in CV mode, the voltage display should  
show the same reading for actual and set values; the current display will switch from the actual value to the current limit. In  
CC mode, the current readings will be the same and the voltage display will switch from actual value to the voltage limit.  
Pressing the DISPLAY OVP switch causes the voltage display to show the OVP trip voltage that has been set.  
The microprocessor also uses the readout to display the GPIB address switch settings, self test error messages, and readback  
overrange conditions.  
RPG and Latches  
When rotated, the RPG products two pulse trains that are 90 degrees phase shifted from each other, with the phase  
relationship determined by the direction of rotation. This circuit contains two flip-flops that monitor the RPG outputs. The  
output of one flip-flop goes low to indicate that the RPG has been rotated, and the output of the other goes low to indicate  
CW rotation or high to indicate CCW rotation. This data is loaded into an input port when D / A is low, and the flip-flops  
are set back to their quiescent state by clock pulses from the address decoder when the input port is addressed.  
Because the microprocessor reads the input approximately every millisecond, it can determine if the RPG is being turned  
rapidly (for a large change) or slowly (for fine adjustment), and the microprocessor varies the rate it changes the DAC  
inputs accordingly.  
Front-Panel Switches and Input Port  
Five front-panel pushbutton switches plus the two RPG flip-flop outputs are connected to this input port. Data is loaded  
when D / A is low, and is shifted out by clock pulses from the address decoders. The microprocessor reads data in via  
DATA UP approximately every millisecond, and checks the switches every 10 ms, thereby ensuring that even rapid switch  
operations will be captured.  
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Figure 4-2. Front Panel Block Diagram  
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Mode Indicators  
The front-panel mode indicators are controlled by the microprocessor via DATA DOWN and the mode indicator output  
ports and latches. DATA DOWN signals are shifted in by clock pulses from the address decoders.  
OVP Adjust Control  
The OVP ADJUST potentiometer sets the voltage level at which the overvoltage protection (OVP) circuit trips.  
Power Clear  
The power clear signal ( PCLR ) from the GPIB board goes low when the unit is turned on, and remains low until the bias  
power supplies have stabilized. This low level resets the display-circuit latches on the front panel board, causing all  
indicators and display segments to turn on and remain on until the microprocessor updates the display (approximately one  
second).  
Power Mesh and Control Board  
The basic operating concepts of the power mesh and control circuits are described in the following paragraphs. The  
beginning paragraphs describe the basic difference between an autoranging power supply and a conventional CV/CC power  
supply in terms of the available output, and provide an overview of the basic theory of operation. Later paragraphs describe  
the functions of the individual circuits on the power mesh and control board.  
Overview  
The basic difference between an autoranging power supply and conventional types of Constant Voltage/Constant Current  
(CV/CC) power supplies can be seen by comparing the maximum-output-power characteristics of each. A conventional  
CV/CC power supply can provide maximum output power at only one combination of output voltage and current, as shown  
in Figure 4-3a. The range of a power supply can be extended by designing an instrument with two or more switch-selectable  
voltage/current ranges within the maximum power-output capability, as shown in Figure 4-3b. An autoranging power supply  
provides maximum output power over a wide and continuous range of voltage and current combinations, as shown in Figure  
4-3c, without the operator having to select the proper output range.  
The unit is a flyback-type switching power supply, so-called from the flyback technique of generating high voltage in  
television receivers. Energy is stored in the magnetic field within a transformer while current flows in the primary, and is  
transferred to the secondary circuit when current flow in the primary is turned off. Current flow in the primary is controlled  
by FET switches which are turned on and off at a 20KHz rate by a pulse width modulator. Regulation is accomplished by  
controlling the on time of the FET switches. On pulses are initiated by a clock circuit. Off pulses are initiated when current  
flow in the primary has stored enough energy for the output circuit, which is determined as follows.  
Sense voltages representing the actual output voltage and current are compared to reference voltages set either by  
front-panel controls or remote programming signals. These comparisons produce a control voltage, which represents the  
amount of power required by the output circuit. Current flow in the primary circuit produces a ramp voltage that represents  
the amount of energy being stored for transfer to the output circuit. An off pulse is generated when the ramp voltage exceeds  
the control voltage. It can be seen that the power available in the output circuit corresponds to the duty cycle of the FET  
switches.  
Figure 4-4 shows the relationship of various signals associated with the FET on/off cycle.  
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Figure 4-3. Output Characteristics; Typical, Dual Range, and Autoranging Supplies  
Figure 4-4. FET Control Signals Timing Diagram  
Power Mesh  
Figure 4-5 is a block diagram of the power mesh. These circuits convert the ac input power to approximately 320Vdc, and  
convert this dc voltage to the proper dc output voltage.  
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Input Circuits. Primary power is connected through the AC Input Filter to the LINE switch and to the normally open  
contacts of the Inrush-Limit relay. When LINE switch is closed, current flows through the inrush current limiting resistor  
and the normally closed relay contacts to the Bridge Rectifier/Voltage Doubler. This circuit is jumper connected as a  
voltage doubler for 100 or 115Vac operation and as a full-wave bridge charges to about 320Vdc for any input voltage.  
Current also flows through the Voltage Select Switch to the Bias Power Supplies, which provide the operating voltages for  
the power supply. The Voltage Select Switch connects the primary windings of the bias transformer for operation at 100,  
120, 220, or 240Vac. The Voltage Select Switch also supplies 120 Vac to the fan and Relay Circuits.  
The Inrush Limit relay is energized by RELAY ENABLE , which is generated on the control board after the unit has  
checked that various operating voltages are within acceptable limits. After a delay of approximately 2-1/2 seconds, which  
allows the Input Filter capacitors to charge, the relay is energized, bypassing the Inrush Limit resistor. A switch on the main  
board switches in more Inrush Limit resistance for 220 or 240Vac operation.  
DC To DC Conversion. Current flow from the input rails through the power transformer is controlled by FET switches. On  
and off pulses for the FETs are generated on the control board, as will be described shortly. On pulses are applied through  
the On Driver and pulse transformer T1 to the gates of both pairs of FETs. Although the on pulse is only about 1.7µs  
duration, the FETs' input capacitance holds the FETs on after the on pulse has disappeared.  
When the FETs are turned on, current flows through the primaries of Power Transformer T2 and Primary-Current Monitor  
Transformer T1. The Output Diodes are reverse biased and block current flow in the T2 secondary. Consequently, energy is  
stored in the field that builds around the T2 transformer windings. The longer that voltage is applied to the primary, the  
more energy is stored. Current flow in the secondary of T1 is connected to the control board, where it generates a ramp  
voltage. The amplitude of this linearly increasing voltage corresponds to the amount of current flow through the T2 primary;  
therefore, it represents the amount of energy being stored in the field around T2. It is this ramp voltage that is compared to a  
control voltage to determine when the FETs should be turned off.  
Off pulses turn on Q5 and Q6, which discharge the FET gates, thereby turning the FETs off. When the FETs are turned off,  
the collapsing magnetic field reverses the polarity across the T2 primary and secondary, and current flows from T2  
secondary through output diodes to charge the output filter capacitors. The level to which the output capacitors are charged  
corresponds to the length of time that the FETs are on and current flows in T2 primary.  
Leakage inductance of T2 attempts to maintain current flow in the primary circuit when the FETs turn off. Flyback diodes in  
the FET board protect the FETs by conducting this current around the FETs and back to the input filter.  
Down Programmer. This circuit allows the output voltage to be lowered rapidly when required. In order to lower the  
output voltage it is necessary to discharge the output filter capacitors (typically, through the load). In situations that require  
the output voltage to drop more rapidly than can be accomplished through the load, the Down Programmer discharges the  
capacitors and pulls the output line low. DOWN PROGRAM ENABLE is generated on the control board. Six conditions  
can conditions can trigger down programming: programming of a lower output voltage, overvoltage, overtemperature,  
remote disable, remote inhibit, or primary power failure.  
The + 10.6Vdc bias supply for the Down Programmer stores enough energy in its input capacitor to operate the Down  
Programmer after loss of primary power. This ensures that the Down Programmer will be able to discharge the output  
circuit completely when primary power is turned off.  
The Agilent 6030A/35A units contain an active bleed circuit, connected across the output, which allows regulation at low  
output current and/or low output voltage levels. This circuit also minimizes dielectric absorption effects, which show up as  
noise on the output of the supply.  
Current Monitor Resistor. A highly stable resistance element in the -output line develops the CURRENT SENSE voltage,  
which is proportional to the power supply output current. This signal is supplied to the CC Circuit on the control board.  
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Control Board  
Figure 4-6 is a block diagram of the control board. These circuits monitor the power supply operation and provide the  
signals that control the power mesh.  
+ 5V Bias Supply. This circuit operates from the + 5V Unregulated voltage from the main board, and generates + 5V and  
+ 2.5V used by circuits on the control board. Regulated + 5V is also supplied back to the main board for use by the relay  
circuits, FET Drivers, and Down Programmer. The + 5V Bias Supply is regulated by a pulse width modulator chip that is  
synchronized by the 40KHz clock signal to the main Pulse Width Modulator; this eliminates the possibility of frequency  
modulated signals on common lines.  
Bias Voltage Detector and Relay Driver. The Bias Voltage Detector monitors + 5V Unregulated to determine when bias  
voltages are sufficient to ensure proper operation. After turn-on, as the output of the + 5V bias supply rises from 0Vdc  
through approximately 1Vdc, three transistor switches in the Bias Voltage Detector turn on. They inhibit the relay driver  
and the on-pulse driver, and generate the power-clear signal. The switches remain on until the + 5V Unregulated input  
exceeds approximately 13 volts, which is sufficient to ensure both a stable + 5V output and adequate FET drive voltage.  
PCLR holds various circuits reset until after the bias voltages stabilize and control circuits are certain to be working.  
RELAY ENABLE , which is delayed for approximately 2 ½ seconds by the Time Delay Circuit, drives relay circuits on the  
main board that short out inrush current limiting resistors after input filter capacitors are charged up. RELAY ENABLE  
cannot occur until bias voltages have stabilized and time delay has expired. ON - PULSE INHIBIT shorts ON pulses to  
ground whenever bias voltage is insufficient to ensure proper operation.  
Note that Bias Voltage Detector inhibits power supply operation in two circumstances: while bias voltages are stabilizing  
after turn-on, and when ac input drops below an adequate level (brownout).  
+ 15V Bias Supply. This circuit produces the + 15V and +5.9V bias voltages. It also produces the reference voltage used  
by the CC and CV Current Sources.  
Time-Delay Circuit. This circuit generates the signal that delays RELAY ENABLE for approximately 2 ½ seconds after  
cessation of an ac fault (Dropout or High AC). The AC FAULT signal is extended for the duration of the time delay and  
supplied to: the 1.25KHz counter in the 20KHz Clock Circuit to reset the counter, so that the time delay output of the Time  
Delay Circuit will remain set; the Pulse Width Modulator (PWM) to inhibit the PWM in case of an ac fault.  
AC Dropout Detector. The AC Dropout Detector operates to shut down the power mesh when primary power is turned off  
or lost. The circuit monitors the 120Hz signal (full-wave rectified 60 Hz ac) from the bias transformer on the main board.  
Dropout is detected by a ramp circuit that is reset by the 120 Hz pulses. If the ramp is not reset within approximately 20  
milliseconds of the previous reset, the circuit generates AC FAULT, which is supplied to the Time Delay Circuit to disable  
RELAY ENABLE and the PWM.  
High AC Detector. The High AC Detector protects the power supply from damage from ac power line surges. The circuit  
contains a comparator that monitors the voltage level of the 120Hz signal. If this voltage exceeds a safe operating level, the  
circuit generates the HIGH AC signal, which is ORED with AC DROPOUT . Either can cause generation of the AC  
FAULT signal.  
Turn-On Overshoot Control. The Turn-On Overshoot Control Circuit prevents output overshoot when the Pulse Width  
Modulator is turned back on after having been turned off. The circuit monitors the PWM OFF signal from the Pulse Width  
Modulator. If the PWM is turned off because of INHIBIT (from GPIB), AC FAULT , OT (overtemperature), or OV  
(overvoltage), the power supply output will be down programmed to zero, and both the CC and CV Circuit outputs will  
increase to maximum in an attempt to restore the output level. This circuit holds the CONTROL PORT at a low level to  
prevent output overshoot when PWM OFF is removed.  
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Constant Current (CC) Circuit. The Constant Current Circuit compares the CURRENT SENSE voltage level to CC  
PROGRAMMING VOLTAGE to produce CC CONTROL SIGNAL. CURRENT SENSE is developed across the  
current-monitor resistor on the main board, and is proportional to the power supply output current. CC PROGRAMMING  
VOLTAGE comes from one of a number of sources as selected by the rear-panel mode switches, and represents the desired  
output current or current limit.  
CC CONTROL SIGNAL varies from approximately -1 to +0.5 volts when the power supply is in constant current mode,  
and is most positive when the CC Circuit is calling for maximum power supply output. CC CONTROL SIGNAL is  
connected through an output diode, CR11, shown at the wired-OR gate that is the CONTROL PORT.  
The amplified current-sense signal is brought out of the CC Circuit as I-MON (current monitor). I-MON is connected to the  
rear-panel IM terminal, and varies from 0 to + 5 volts as the output current varies from zero to full scale.  
A differentiator circuit in the CC Circuit block provides increased stability for highly reactive loads.  
Constant Voltage (CV) Circuit. Operation of the CV Circuit is similar to the CC Circuit. The CV Circuit compares the  
output SENSE voltage to the CV PROGRAMMING VOLTAGE to produce the CV CONTROL SIGNAL. + OUT and -  
OUT are also supplied to the circuit as protection in case the sense leads are inadvertently disconnected. CV CONTROL  
SIGNAL also varies between approximately -1 to + 0.5 volts, and is connected through diode CR24 to the CONTROL  
PORT.  
The buffered voltage-sense signal is brought out of the CV Circuit as V_MON (voltage monitor). V_MON is connected to  
the rear-panel VM terminal, and varies from 0 to + 5 volts as the output voltage varies from zero to full scale. Both V-MON  
and I-MON are referenced to monitor common ( M).  
The CV Circuit also produces the DOWN PROGRAM ENABLE signal when the CV PROGRAMMING VOLTAGE is  
changed quickly from a relatively high level to a relatively low level. This allows the power supply output voltage to be  
lowered more rapidly than if the output filter capacitors had to be discharged solely through the load.  
CC And CV Current Sources. This circuit generates constant currents that are connected to front-panel VOLTAGE and  
CURRENT potentiometers of non-- GPIB units to develop the CC and CV programming voltages.  
Mode Switches. The rear-panel mode switches select the source of the CC and CV PROGRAMMING VOLTAGES. For  
GPIB units, the programming voltages are supplied via the GPIB board, and are connected through mode switches B1 and  
B4 to the CC and CV Circuits. For non-- GPIB units, mode switches B2, B3, and B5, B6 are closed. The CC and CV  
Current Source outputs are connected through B2 and B5 to the front-panel CURRENT and VOLTAGE potentiometers,  
and the voltages developed across the potentiometers are connected through B3 and B6 to the CC and CV Circuits.  
Remote analog programming voltages can be supplied to the CC and CV Circuits from the rear-panel IP and VP terminals.  
IP and VP are referenced to program common ( P).  
Primary Current Ramp. The output from the primary current-monitor transformer on the main board is developed across  
R116 and R117 to produce a ramp voltage that represents the amount of energy being stored in the power transformer for  
transfer to the power supply output circuits. This ramp voltage is connected to the Power Limit Comparator and to the  
Control Voltage Comparator.  
Power Limit Comparator. The power supply maximum output power curve (shown in Specifications Table in the  
Operating Manual) is defined by this circuit. The PRIMARY CURRENT RAMP voltage, which represents the amount of  
power being supplied to the power supply output, is compared to a voltage which represents the maximum amount of power  
that the power supply can supply safely. If the ramp voltage exceeds the limit voltage, the POWER LIMIT signal is  
produced to turn off the PWM.  
The Power Limit Comparator Circuit includes a dynamic primary-current-limit circuit, which decreases the primary current  
limit to maintain the output power curve at specified limits.  
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Control Voltage Comparator. This circuit compares the voltage at the CONTROL PORT (represents power required at  
output) with PRIMARY CURRENT RAMP voltage (represents energy being stored for transfer to output). When RAMP  
voltage exceeds CONTROL PORT voltage, the Control Voltage Comparator generates the CONTROL LIMIT signal to  
turn the PWM off. The CONTROL PORT is biased to approximately + 1.3 volts. Whichever control signal, CC or CV, is  
more negative (calling for less output power) forward biases its output diode and determines the voltage at the CONTROL  
PORT.  
As can be seen from the waveforms in Figure 4-4, there is a delay between the time when PRIMARY CURRENT RAMP  
voltage exceeds the CONTROL PORT voltage and the time when the FETs turn off. This delay consists of the comparator  
switching time, gate delays, transformer delay, and FET turn-off time, and it results in a certain amount of power being  
transferred to the output after the desired off time. If the CONTROL PORT voltage is at a very low level (unit supplying  
little or no output power), this power may exceed the amount required by the load. To eliminate the delay, the Control  
Voltage Comparator includes an initial ramp circuit that generates a small ramp voltage before the FETs are turned on. The  
added ramp voltage starts with the 20KHz clock pulse, and causes the combined-ramp voltage to exceed the CONTROL  
PORT voltage earlier, thereby effectively eliminating the FET turn-off delay.  
Status Drivers. Inputs from the CC and CV Circuits indicate which circuit, if either, is regulating the power supply output.  
If neither circuit is regulating the output (load calling for more power than the power supply can deliver), logic circuits  
within Status Driver block determine that output is unregulated.  
In GPIB units, CC and CV signals go to the microcomputer, which will take appropriate action, including lighting  
front-panel indicators. In non-- GPIB units, Status Driver outputs go to front-panel indicators.  
20KHz Clock. This circuit contains a 320KHz crystal oscillator and dividers that produce 40KHz, 20KHz, and 1.25KHz  
signals. Both the 320KHz and 20KHz signals are supplied to the PWM, with the 20KHz signal controlling the repetition  
rate of the PWM.  
The 40 KHz signal is supplied to the +5V Bias Supply Circuit to synchronize the PWM in that circuit to the main power  
supply PWM. The 1.25KHz output is supplied to the Time Delay Circuit for generating the time delay used to control the  
power supply turn-on sequence.  
The 1.25KHz signal is subsequently disabled by the AC FAULT output from the Time Delay Circuit at the end of the time  
delay.  
Pulse Width Modulator (PWM). The PWM generates the ON and OFF pulses that control the power FETs in the power  
mesh. ON pulses are generated at a 20KHz rate, and, as can be seen in Figure 4-4, are initiated by the first 320KHz dock  
pulse after the start of the 20KHz clock pulse. When the FET switches turn on, current flows through the Primary Current  
Monitor transformer on the main board, and the Primary CURRENT RAMP voltage starts to rise. OFF pulses are normally  
initiated when CONTROL LIMIT becomes active (low), indicating that the ramp voltage has exceeded the CONTROL  
PORT voltage. However, an off pulse can be initiated by any one of a number of other signals.  
An overtemperature ( OT ), overvoltage ( OV ), remote inhibit, AC FAULT condition or an INHIBIT signal from GPIB  
will initiate an OFF pulse, and will also trigger the Down Programmer to reduce output voltage to zero. These conditions  
will also cause PWM OFF to be sent to the TurnOn Overshoot Control Circuit.  
OFF pulses can also be initiated by POWER LIMIT and by the trailing edge of the 20KHz clock signal. The 20KHz clock  
signal ensures that even if nothing else, such as CONTROL LIMIT or POWER LIMIT , initiates an OFF pulse, the FET  
duty cycle will be limited to less than 50%.  
Overvoltage Protection (OVP). The OVP circuit monitors the power supply output voltage and compares it to a preset  
limit determined by a front-panel OVP ADJUST potentiometer. If the output voltage exceeds the limit, the OVP Circuit  
initiates a PWM OFF pulse, which also triggers the Down Programmer. The OVP Circuit lathes itself until it receives OV  
CLEAR or ac power is turned off.  
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Figure 4-5. Power Mesh Block Diagram  
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Figure 4-6. Control Board Block Diagram  
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5
Replaceable Parts  
Introduction  
This chapter contains information for ordering replacement parts. Table 5-1 lists parts in alpha-numeric order by reference  
designators and provides the following information:  
a. Reference Designators. Refer to Table 5-1.  
b. Agilent Technologies model in which the particular part is used.  
c. Agilent Technologies Part Number.  
d. Description. Refer to Table 5-2 for abbreviations.  
Parts not identified by reference designator are listed at the end of Table 5-4 under Mechanical and/or Miscellaneous.  
Table 5-1. Reference Designators  
A
Assembly  
B
Blower  
C
Capacitor  
CR  
DS  
F
Diode  
Signaling Device (light)  
Fuse  
FL  
G
J
Filter  
Pulse Generator  
Jack  
K
Relay  
L
Inductor  
Q
Transistor  
RT  
S
Thermistor Disc  
Switch  
T
Transformer  
Terminal Block  
Thermal Switch  
Integrated Circuit  
Voltage Regulator (Zener diode)  
Wire Jumper)  
Socket*  
TB  
TS  
U
VR  
W
X
Y
Oscillator  
* Reference designator following "X" (e.g. XA2) indicates assembly or device mounted in socket.  
79  
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Ordering Information  
To order a replacement part, address order or inquiry to your local Agilent Technologies sales office. Specify the following  
information for each part: Model, complete serial number, and any Option or special modification (J) numbers of the  
instrument; Agilent Technologies part number; circuit reference designator; and description. To order a part not listed in  
Table 5-4, give a complete description of the part, its function, and its location.  
Table 5-2. Description Abbreviations  
ADDR  
ASSY  
AWG  
BUFF  
CER  
Addressable  
Assembly  
American Wire Gauge  
Buffer  
Ceramic  
COMP  
CONV  
DECODER/DEMULTI  
ELECT  
EPROM  
FET  
Carbon Film Composition  
Converter  
Decoder/Demultiplexer  
Electrolytic  
Erasable Programmable Read-Only Memory  
Field Effect Transistor  
Flip-Flop  
FF  
FXD  
Fixed  
IC  
INP  
Integrated Circuit  
Input  
LED  
MET  
Light Emitting Diode  
Metalized  
MOS  
Metal-Oxide Silicon  
Operational Amplifier  
Optical  
Over Voltage Protection  
Printed Circuit Board  
Porcelain  
OP AMP  
OPTO  
OVP  
PCB  
PORC  
POS  
Positive  
PRIOR  
ROM  
RAM  
RECT  
REGIS  
RES  
Priority  
Read-Only Memory  
Random Access Memory  
Rectifier  
Register  
Resistor  
TBAX  
TRlG  
Tube Axial  
Triggered  
UNI  
Universal  
VAR  
Variable  
VLTG REG  
WW  
Voltage Regulator  
Wire Wound  
80  
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Table 5-3. Replaceable Parts List  
Description  
Ref. Desig  
Al  
Agilent Model  
6030A  
6031A  
6032A  
6035A  
Agilent Part Number  
06030-61032  
06031-61032  
06032-61032  
06030-61033  
0180-4528  
0160-5932  
0180-3699  
0180-0426  
0160-5895  
0160-5933  
0180-3702  
0180-3425  
0180-3492  
0180-4240  
0180-3587  
0180-3425  
0180-0291  
0180-3587  
0160-0269  
0180-0291  
0160-5286  
0180-0904  
0160-6392  
0180-0291  
0160-7732  
0160-6392  
0160-6392  
0160-5377  
0160-7732  
0160-6392  
0160-7732  
0160-4281  
0160-0269  
0160-5377  
0160-5286  
0180-0904  
0160-5377  
0160-4281  
0160-6805  
0160-4281  
0160-7732  
0160-4323  
0160-4281  
0160-7606  
0160-4323  
0160-7606  
0160-6805  
Main Board Assembly  
"
"
"
Cl,2,4,5,6,8  
C9  
C10  
all  
all  
cap 1800µF 200V  
cap 0.47µF 250V  
cap 470µF 20% 35V  
cap 22µF 250V  
cap 0.047µF  
cap 0.022µF 10%  
cap 1600µF 125V  
cap 5500µF 40V  
cap 2600µF 75V  
cap 900µF 350V  
cap 1000µF 50 V  
cap 5500µF 40V  
cap lµF 35V  
cap 1000µF 50V  
cap 0.047µF 20%  
cap 1µF 35V  
cap 0.47µF 20%  
cap 0.05µF 1KV  
cap 0.047µF 20%  
cap 1µF 35V  
cap 0.47µF  
cap 0.047µF  
cap 0.047µF 20%  
cap 2.2µF 10% 63V  
cap 0.47µF  
cap 0.047µF  
cap 0.47µF  
cap 2200pF 20%  
cap 0.047µF 20%  
cap 2.2µF 10% 63V  
cap 0.47µF 20%  
cap 0.05µF 1KV  
cap 2.2µF 10% 63V  
cap 2200pF 20%  
cap 0.01µF 400V  
cap 2200pF 20%  
cap 0.47µF  
cap 0.047µF 20%, 250V  
cap 2200pF 20%  
cap 1µF 20%  
cap 0.047µF 20%, 250V  
cap lµF 20%  
6030A,35A  
6031A,32A  
6030A, 31A  
6032A, 35A  
6030A  
6031A  
6032A*  
6035A  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
6030A*  
6031A  
6032A*  
6035A*  
6030A,35A*  
6031A  
C11,12  
C13,14  
C15,16  
C17,18  
C19  
C20  
6032A*  
C21  
C22  
6030A,35A*  
6030A,35A*  
6031A*  
6032A*  
6030A,35A*  
6031A*  
6032A*  
6030A*  
6031A*  
6032A*  
6035A*  
6031A*  
6032A*  
All  
6031A*  
6031A*  
6030A,32A,35A  
6031A*  
6030A,32A,35A  
6031A  
C23  
C24  
C25  
C26  
C27  
C27  
C28  
C29  
C30  
C32  
C33  
C34  
6031A  
All  
cap 0.01µF 400V  
* Part of output filter, mounted on output bus bars.  
81  
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Table 5-3. Replaceable Parts List (continued)  
Agilent Part Number Description  
Ref. Desig  
CR1  
CR2  
CR3,4  
CR5-13  
DS1  
F1  
F2  
J2  
J5  
J6  
Agilent Model  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
1901-0731  
1901-0731  
1901-0050  
1901-0731  
1990-0517  
2110-0001  
2110-0671  
1251-5384  
5060-2877  
5060-2878  
1251-0600  
1251-5613  
1251-5613  
1251-0600  
0490-1834  
9170-0707  
9170-1267  
06011-80092  
9140-1064  
06011-80092  
06012-80095  
5080-2131  
9170-1267  
1855-0456  
1855-0456  
1855-0665  
0811-1866  
0757-0418  
0698-5525  
0757-0765  
0811-3700  
0811-3699  
5080-2079  
06032-80001  
0699-0188  
0698-3492  
0699-0188  
06011-80001  
0698-3492  
7175-0057  
0812-0100  
0683-1065  
0757-0921  
0757-0403  
0699-0208  
0699-0208  
0699-0208  
0686-2015  
0811-1869  
power rectifier 400V  
power rectifier 400V lA  
diode, switching 80V 200mA  
power rectifier 400V  
LED, visible  
fuse lAM, 250V  
fuse 250mAM, 125V  
connector, 3-pin  
ribbon cable (W8)  
ribbon cable (W7)  
connector, single contact  
connector, single contact  
connector, single contact  
connector, single contact  
relay 1C 15Vdc-coil 30A 30Vdc  
ferrite core (jumper 06012-80003)  
magnetic core (jumper 5080-2040)  
output choke  
output choke  
output choke  
output choke (core 9170-0721)  
output choke 18µH 5A  
magnetic core (jumper 5080-2040)  
MOSFET N-chan  
MOSFET N-chan  
MOSFET N-chan  
res 10K 1% 5W  
res 619 1% 1/8W  
J7,8  
J9,10  
L,N,P  
J11-14  
K1, K2  
L1  
all  
L2  
6030A,32A,35A  
6031A  
6030A  
6031A  
6032A  
6035A  
6031A  
6030A,31A,32A  
6035A  
all  
all  
all  
all  
all  
all  
all  
6030A,35A  
6032A  
6030A,31A,32A  
6035A  
6030A,32A  
6031A  
6035A  
6031A  
6032A  
all  
all  
all  
6031A  
6032A  
6031A  
all  
L3  
L4  
Q1  
Q2  
R1-4  
R5  
R7  
R8  
R9  
R10  
R11  
res 6.8 5% 1/2W  
res 36.5K 1% 1/8W  
res 20 10% 20W  
res 6 10% 20W  
current sensing resistor  
current sensing resistor  
res 2.2 5% 1/4W  
res 26.1 ohms  
res 2.2 5% 1/4W  
current sensing resistor  
res 26.1 ohms  
solid tinned copper wire  
res 2K 5% 5W  
res 10M 5% 1/4W  
res 750 1% 1/8W  
res 121 1% 1/8W  
R12  
R13  
R14,15  
R16,17  
R18  
R19  
R20*  
R21-22*  
R23*  
R24  
res 1 5% 1/4W  
res 1 5% 1/4W  
res 1 5% 1/4W  
res 200 5% 1/2W  
R25  
6031A,32A  
res 30 3W  
* Part of output filter, mounted on output bus bars.  
82  
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Table 5-3. Replaceable Parts List (continued)  
Agilent Part Number Description  
Ref. Desig  
R29,30  
Agilent Model  
6030A  
6035A  
6030A  
6035A  
6030A  
6035A  
6030A  
6035A  
6030A,35A  
6030A,35A  
6030A  
6035A  
6030A,35A  
6030A,35A  
all  
all  
all  
all  
all  
all  
all  
all  
0811-1887  
0811-3557  
0757-0367  
0698-8959  
0686-7535  
0698-8959  
0757-0451  
0757-0471  
0757-0438  
0698-8827  
0811-1909  
0811-1913  
0757-0467  
0764-0041  
0698-0085  
0698-8827  
0757-0419  
0698-3622  
0757-0401  
3101-2046  
3101-1914  
9100-4350  
06030-80090  
06011-80090  
06032-80090  
9100-4827  
9100-4864  
1906-0389  
1826-0393  
1826-0643  
1990-1074  
1902-0955  
1252-1052  
1251-7891  
res 0.05 5% 10W  
res 0.5 5% 10W  
R31  
R32  
R33  
res 100K 1% 1/2W  
res 619K 1% 1/8W  
res 75K 5% 1/2W  
res 619K 1% 1/8W  
res 24.3K 1% 1/8W  
res 182K 1% 1/8W  
res 5.11K 1% 1/8W  
res 1M 1% 1/8W  
res 500 5% 10W  
res 1.5K 5% 10W  
res 121K 1% 1/8W  
res 30 5% 2W  
res 2.61k 1% 1/8W  
res 1M 1% 1/8W  
res 681 1% 1/8W  
res 120 5% 2W  
res 100 1% 1/8W  
switch, DPDT slide  
switch, 2-DPDT slide  
current transformer  
power transformer  
power transformer  
power transformer  
power transformer  
bias transformer  
R34  
R35  
R36,37  
R38,39  
R41  
R43,44  
R45  
R46  
R47, 48  
R49  
S1  
S2  
T1  
T2  
6030A  
6031A  
6032A  
6035A  
all  
all  
all  
all  
all  
T3  
U1  
U3  
U5  
U6  
VR1  
XA4,5  
rectifier bridge  
IC, voltage regulator 1.2/37V  
IC, voltage regulator 3/30V  
IC, opto-isolator  
diode, zener, 7.5V  
connector 64-pin  
connector 64-pin  
all  
6030A,35A  
6031A,32A  
6030A  
6031A  
6032A  
6035A  
5060-3520  
5060-3524  
5060-3523  
5060-3521  
Output filter board  
Output filter board  
Output filter board  
Output filter board  
A1 Mechanical  
1205-0282  
1205-0862  
2110-0726  
0403-0086  
0380-1692  
all  
all  
all  
all  
all  
heatsink (U3)  
heatsink (U1)  
fuse clips (F1)  
bumper foot (R9,10)  
standoff, 109mm (4)  
83  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
A2  
Agilent Model  
6030A  
6031A  
6032A  
6035A  
all  
all  
all  
all  
all  
all  
all  
all  
all  
6030A,32A,35A  
6031A  
all  
6030A,31A,32A  
6035A  
6030A,32A,35A  
6031A  
Agilent Part Number  
06030-60022  
06011-60022  
06032-60022  
06030-60028  
0160-5422  
0160-4801  
0160-5422  
0160-5892  
0160-5422  
0160-4807  
0160-5892  
0160-4830  
0160-5422  
0160-4833  
0160-4832  
0160-5892  
0160-5469  
0160-5534  
0160-5892  
0160-5534  
0160-5422  
0160-0162  
0160-0161  
0160-4812  
0160-4807  
0160-5892  
0160-5534  
0160-4834  
0160-4833  
0160-5422  
0160-4807  
0160-5422  
0160-5644  
0160-4832  
0160-4822  
0160-4831  
0160-4824  
0160-4832  
0160-4835  
0160-5422  
0160-4812  
0160-4830  
0160-5422  
0160-4831  
0160-4812  
0160-4831  
0160-5422  
0160-4812  
0160-5166  
0160-4832  
Description  
Control Board Assembly  
"
"
"
C1-4  
C5  
C6-7  
C8  
cap 0.047µF 20% 50V  
cap 100pF 5% 100V  
cap 0.047µF 20% 50V  
cap 0.22µF 10%  
cap 0.047 20% 50V  
cap 33pF 5% 100V  
cap 0.22µF 10%  
cap 2200pF 10% 100V  
cap 0.047µF 20% 50V  
cap 0.022µF 10% 100V  
cap 0.01µF 10% 100V  
cap 0.22µF 10%  
cap 1µF 10% 50V  
cap 0.1µF 10% 63V  
cap 0.22µF 10%  
cap 0.1µF 10% 63V  
cap 0.047µF 20% 50V  
cap 0.022µF 10% 200V  
cap 0.01µF 10% 200V  
cap 220pF 5% 100V  
cap 33pF 5% 100V  
cap 0.22µF 10%  
cap 0.1µF 10% 63V  
cap 0.047µF 10% 100V  
cap 0.022µF 10% 100V  
cap 0.047µF 20% 50V  
cap 33pF 5% 100V  
cap 0.047µF 20% 50V  
cap 0.033µF 10% 50V  
cap 0.01µF 10% 100V  
cap 1000pF 5% 100V  
cap 4700pF 10% 100V  
cap 680pF 5% 100V  
cap 0.01µF 10% 100V  
cap 0.1µF 10% 50V  
cap 0.047µF 20% 50V  
cap 220pF 5% 100V  
cap 2200pF 10% 100V  
cap 0.047µF 20% 50V  
cap 4700pF 10% 100V  
cap 220pF 5% 100V  
cap 4700pF 10% 100V  
cap 0.047µ F 20% 50V  
cap 220pF 5% 100V  
cap 0.015µF 20% 100V  
cap 0.01µF 20% 100V  
C9  
C10  
C11  
C12  
C13-16  
C17  
C18  
C19  
C20  
C21,22  
C24  
all  
6030A,32A,35A  
6031A  
6030A,32A,35A  
all  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
C25  
C26  
C27  
C28  
C29  
C30  
C31  
C32  
all  
all  
all  
6030A,32A,35A  
6031A  
6030A  
6032A  
6035A  
6031A  
6032A  
all  
all  
6032A  
all  
all  
all  
all  
all  
all  
C33  
C34  
C35  
C36  
C37  
C38-40  
C41  
C42  
C43  
C44  
C45  
C46  
6030A,31A,32A  
6035A  
84  
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Table 5-3. Replaceable Parts List (continued)  
Agilent Part Number Description  
Ref. Desig  
C47  
C48,49  
C50  
C51  
C52  
C53  
C54  
C55  
C56,57  
C58  
C59  
C60  
C61  
C62  
C63  
C64  
C65  
C66  
C67  
C68  
C69,70  
C71  
C72  
C73  
C74,75  
C76  
C77  
C78  
C79  
C80  
C81  
C82  
C83  
C84  
C85  
Agilent Model  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
0160-5422  
0160-4835  
0180-0291  
0180-1731  
0180-0230  
0180-1731  
0180-0291  
0180-0230  
0160-5422  
0160-4801  
0160-4835  
0160-5422  
0160-4812  
0160-1835  
0180-1980  
0180-0116  
0160-5422  
0160-4801  
0160-5422  
0160-1822  
0160-5422  
0180-0376  
0180-2624  
0180-3407  
0160-5098  
0160-4835  
0160-4833  
0160-4832  
0160-4830  
0160-4813  
0160-5422  
0160-4812  
0160-5422  
0160-4812  
0160-4832  
1901-0033  
1901-0050  
1901-0033  
1901-0050  
1901-0033  
1901-0050  
1901-0033  
1901-0050  
1901-0033  
1901-0050  
1901-0992  
1251-8417  
1251-7743  
1251-5927  
1251-8676  
cap 0.047µF 20% 50V  
cap 0.1µF 10% 50V  
cap 1µF 10% 35V  
cap 4.7µF 50V  
cap 1µF 20% 50V  
cap 4.7µF 50V  
cap 1µF 10% 35V  
cap 1µF 20% 50V  
cap 0.047µF 20% 50V  
cap 100pF 5% 100V  
cap 0.1µF 10% 50V  
cap 0.047µF 20% 50V  
cap 220pF 5% 100V  
cap 0.1µF 10% 50V  
cap 1µF 5% 35V  
cap 6.8µ F 10% 35V  
cap 0.047µF 20% 50V  
cap 100pF 5% 100V  
cap 0.047µF 20% 50V  
cap 1000pF 5% 100V  
cap 0.047µ F 20% 50V  
cap 0.47µF 10% 35V  
cap 2000µF 10V  
cap 2200µF 35V  
cap 0.22µF 10% 50V  
cap 0.1µF 10% 50V  
cap 0.022µF 10% 100V  
cap 0.01µF 10% 100V  
cap 2200pF 10% 100V  
cap 180pF 5% 100V  
cap 0.047µF 20% 50V  
cap 220pF 5% 100V  
cap 0.047µF 20% 50V  
cap 220pF 5% 100V  
cap 0.01µF 10% 100V  
gen prp 180V 200mA  
switching 80V 200mA  
gen prp 180V 200mA  
switching 80V 200mA  
gen prp 180V 200mA  
switching 80V 200mA  
gen prp 180V 200mA  
switching 80V 200mA  
gen prp 180V 200mA  
switching 80V 200mA  
schottky 40V 3A  
CR1-6  
CR7,8  
CR9,10  
CR11  
CR12  
CR13,14  
CR15,16  
CR17,18  
CR19  
CR20-31  
CR32  
J1,2  
connector 16-pin  
connector 26-pin  
connector 26-pin  
connector 5-pin  
J3  
6030A,35A  
6031A,32A  
all  
J4  
85  
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Table 5-3. Replaceable Parts List (continued)  
Agilent Part Number Description  
Ref. Desig  
J5,6  
J15  
Agilent Model  
all  
6030A,35A  
1251-5240  
1251-0600  
06023-80090  
1854-0823  
1855-0413  
1854-0823  
1853-0012  
1854-0635  
1853-0036  
1858-0023  
0686-5125  
0683-5125  
0757-0483  
0683-2015  
0698-6615  
0699-1011  
0698-7631  
0757-0424  
0683-5125  
2100-3353  
2100-3352  
2100-3351  
0698-3433  
0757-0465  
0698-3430  
0757-0379  
0686-5125  
0683-2015  
0698-7082  
0683-1025  
0757-0442  
0686-5135  
0686-1025  
2100-3274  
2100-3350  
2100-3273  
2100-3353  
2100-3273  
2100-3350  
2100-3273  
2100-3274  
0757-0470  
0757-0464  
0698-4509  
0757-0280  
0698-3260  
0757-0741  
0698-8827  
0698-3449  
0757-0458  
connector 20-pin  
connector 1-pin  
L1  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
6030A  
6031A  
6032A  
6035A  
choke  
Q1-3  
Q4-6  
Q7  
Q8  
Q9  
Q10  
Q11  
R1,2  
R3  
R4  
R5  
transistor NPN Si  
J-FET P-chan Si  
transistor NPN Si  
transistor PNP Si  
transistor NPN Si  
transistor PNP Si  
transistor array  
res 5.1K 5% 1/2W  
res 5.1K 5% 1/4W  
res 562K 1% 1/8W  
res 200 5% 1/4W  
res 3.75K 0.1%  
R6  
res 3.32K 1% 1/8W  
res 2.87K 1%  
res 1.1K 1% 1/8W  
res 5.1K 5% 1/4W  
trimmer 20K 10%  
trimmer lK 10%  
trimmer 500 10%  
res 28.7 1% 1/8W  
res 100K 1% 1/8W  
res 21.5 1% 1/8W  
res 12.1 1% 1/8W  
res 5.1K 1/2W  
res 200 5% 1/4W  
res 100K 1% 1/8W  
res 1K 5% 1/4W  
res 10K 1% 1/8W  
res 51K 5% 1/2W  
res 1K 5% 1/4W  
trimmer 10K 10%  
trimmer 200 10%  
trimmer 2K 10%  
trimmer 20K 10%  
trimmer 2K 10%  
trimmer 200 10%  
trimmer 2K 10%  
trimmer 10K 10%  
res 162K 1% 1/8W  
res 90.9K 1% 1/8W  
res 80.6K 1% 1/8W  
res 1K 1% 1/8W  
res 464K 1% 1/8W  
res 182K 1% 1/8W  
res 1M 1% 1/8W  
res 28.7K 1% 1/8W  
res 51.1K 1% 1/8W  
R7  
R8  
R9  
all  
all  
6030A,31A,32A  
6035A  
all  
6030A,32A,35A  
6030A,35A  
6032A  
all  
all  
all  
all  
all  
6030A,35A  
6031A,32A  
6030A,35A  
6031A  
6032A  
all  
all  
all  
all  
all  
all  
all  
all  
all  
R10  
R11,12  
R13  
R14,15  
R16  
R17  
R18  
R19  
R20  
R21  
R22  
R23  
R24  
R25  
R26  
R27  
R28  
R29  
R30  
R31  
6030A,31A,32A  
6035A  
all  
all  
R32  
R33  
R34  
6030A,32A,35A  
86  
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Table 5-3. Replaceable Parts List (continued)  
Agilent Part Number Description  
Ref. Desig  
Agilent Model  
6031A  
6030A,35A  
6031A  
6032A  
all  
0757-0442  
0683-1055  
0683-3355  
0683-1555  
0698-3455  
0698-4536  
0698-4536  
0698-3455  
0683-4725  
0699-1210  
0698-6979  
0683-2055  
0699-1744  
0699-0118  
0699-1210  
0699-3104  
0699-1742  
0699-0059  
0699-0642  
0699-1743  
0699-0118  
0699-1211  
0757-0199  
0698-8816  
0683-1255  
0698-4539  
0757-0470  
0757-0458  
0757-0458  
0699-1745  
7175-0057  
0698-7496  
0698-6369  
0686-5135  
0686-1025  
7175-0057  
0698-3433  
0699-1742  
0699-0059  
0699-0642  
0757-0451  
0757-0462  
0757-0458  
0698-3450  
0757-0451  
0757-0462  
0757-0458  
0757-0199  
7175-0057  
0698-3155  
res 10K 1% 1/8W  
res 1M 5% 1/4W  
res 3.3M 5% 1/4W  
res 1.5M 5% 1/4W  
res 261K 1% 1/8W  
res 340K 1% 1/8W  
res 340K 1% 1/8W  
res 261K 1% 1/8W  
res 4.7K 5% 1/4W  
res 80K 0.1% 0.1W  
res 111.1K 1%  
R35  
R36  
R37  
R38  
all  
6030A,35A  
6031A,32A  
all  
6030A,32A  
6035A  
6035A  
6030A  
6031A  
6032A  
6035A  
6030A,35A  
6031A  
6032A  
6030A,35A  
6031A  
6032A  
all  
all  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
all  
6030A  
6031A  
6032A  
6035A  
6030A,35A  
6031A,32A  
6030A,32A,35A  
6031A  
6030A,35A  
6031A  
6032A  
6030A,35A  
6031A  
6032A  
all  
6030A,35A  
6031A  
6032A  
R39  
R40  
assembled  
in parallel  
├
res 2M 1%  
R41  
res 280K 1% 0.1W  
res 20K 0.1% 0.1W  
res 80K 0.1% 0.1W  
res 250K 0.1% 0.1W  
res 70K 0.1% 0.1W  
res 5K 0.1% 0.1W  
res 10K 0.1% 0.1W  
res 345K 0.1% 0.1W  
res 20K 0.1% 0.1W  
res 95K 0.1% 0.1W  
res 21.5K 1% 1/8W  
res 2.15 1% 1/8W  
res 1.2M 5% 1/4W  
res 402K 1% 1/8W  
res 162K 1% 1/8W  
res 51.1K 1%  
R42  
R43  
R44  
R45  
R46  
R47  
R48  
R49  
res 51.1K 1%  
res 560K 0.1% 1/4W  
jumper  
res 20K 0.1% 1/4W  
2 - resistors 1M 1% (assembled in series )  
res 51K 5% 1/2W  
res 1K 5% 1/2W  
R50  
R51  
R52  
jumper  
res 28.7 1% 1/8W  
res 70K 0.1% 0.1W  
res 5K 0.1% 0.1W  
res 10K 0.1% 0.1W  
res 24.3K 1% 1/8W  
res 75K 1% 1/8W  
res 51.1K 1% 1/8W  
res 42.2K 1% 1/8W  
res 24.3K 1% 1/8W  
res 75K 1% 1/8W  
res 51.1K 1% 1/8W  
res 21.5K 1% 1/8W  
jumper  
R53  
R54  
R55  
R56  
R57  
6030A,32A,35A  
6031A  
6030A,31A,32A  
res 4.64K 1% 1/8W  
87  
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Table 5-3. Replaceable Parts List (continued)  
Agilent Part Number Description  
Ref. Desig  
R57  
R58  
Agilent Model  
6035A  
6030A  
6031A  
6032A  
6035A  
6030A  
6031A  
6032A  
6035A  
6030A  
6031A  
6032A  
6035A  
all  
0757-0124  
0757-0344  
0757-0449  
0698-3572  
0699-1630  
0698-4486  
0757-0442  
0757-0438  
0698-7668  
0757-0344  
0757-0449  
0698-3572  
0699-1630  
0757-0124  
0683-1015  
0757-0124  
0757-0270  
0757-0473  
0683-4725  
0757-0459  
0757-0123  
0757-0270  
0683-1015  
0757-0449  
0698-0085  
0757-0452  
0757-0289  
0757-0442  
0757-0461  
0757-0460  
0698-8827  
0757-0438  
0683-4715  
0698-6322  
0683-2035  
0757-0419  
0698-3444  
0683-4715  
0698-6322  
0698-6320  
0698-6983  
0757-0465  
0699-1741  
0698-6322  
0698-7933  
0699-2850  
0699-1745  
0698-8695  
0698-6979  
0698-6950  
res 39.2K 1% 1/8W  
res 1M 1% 1/4W  
res 20K 1% 1/8W  
res 60.4K 1% 1/8W  
res 4M 0.25% 1/2W  
res 24.9K 1% 1/8W  
res 10K 1% 1/8W  
res 5.11K 1% 1/8W  
res 39.91K 1%  
R59,60  
R61  
res 1M 1% 1/4W  
res 20K 1% 1/8W  
res 60.4K 1% 1/8W  
res 4M 0.25% 1/2W  
res 39.2K 1% 1/8W  
res 100 5% 1/4W  
res 39.2K 1% 1/8W  
res 249K 1% 1/8W  
res 221K 1% 1/8W  
res 4.7K 5% 1/4W  
res 56.2K 1% 1/8W  
res 34.8K 1% 1/8W  
res 249K 1% 1/8W  
res 100 5% 1/4W  
res 20K 1% 1/8W  
res 2.61K 1% 1/8W  
res 27.4K 1% 1/8W  
res 13.3K 1% 1/8W  
res 10K 1% 1/8W  
res 68.1K 1% 1/8W  
res 61.9K 1% 1/8W  
res 1M 1% 1/8W  
R62  
R63  
R64  
all  
6030A,32A,35A  
6031A  
6032A  
all  
6031A  
6032A  
all  
all  
all  
all  
all  
6030A,35A  
6031A  
6032A  
all  
all  
all  
all  
all  
all  
R65  
R66  
R67  
R68  
R69  
R70  
R71  
R72  
R73  
R74  
R75  
R76  
R77  
R78  
R79,80  
R81  
res 5.11K 1% 1/8W  
res 470 5% 1/4W  
res 4K 1% 1/8W  
res 20K 5% 1/4W  
res 681 1% 1/8W  
res 316 1% 1/8W  
6030A,32A,35A  
6031A  
all  
all  
all  
R82  
R83  
R84  
R85  
R86  
R87  
res 470 5% 1/4W  
res 4K 1% 1/8W  
res 5K 0.1% 1/8W  
res 20.4K 0.1% 1/8W  
res 100K 1% 1/8W  
res 5.657K 0.1% 1/8W  
res 4K 1% 1/8W  
res 3.83K 0.1% 1/8W  
res 10.04K 0.1%  
res 500 0.1% 1/8W  
res 36K 0.1% 1/8W  
res 111.1K 01% 1/8W  
2 - resistors 1.25M .1% (assembled in series )  
all  
all  
6030A  
6031A  
6032A  
6035A  
6030A  
6031A  
6032A  
6035A  
R88  
88  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
R89-91  
R92  
Agilent Model  
all  
6030A,35A  
6031A  
6032A  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
6030A,35A  
6031A,32A  
6030A,35A  
6031A,32A  
6030A,35A  
6031A,32A  
6030A,35A  
6031A,32A  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
Agilent Part Number  
0683-2225  
0898-4480  
0757-0457  
0757-0464  
0683-3325  
0683-2225  
0757-0481  
0757-0290  
0757-0444  
0698-4416  
0757-0404  
0698-4608  
0698-4447  
0698-4416  
0683-4725  
0757-0404  
0683-2715  
0757-0404  
0683-1815  
0757-0404  
0683-2715  
0757-0404  
0683-1815  
0683-5105  
0683-2035  
0757-0199  
0757-0283  
0683-2225  
0757-0280  
0757-0346  
0698-3498  
0757-0438  
0683-4725  
0683-2025  
0683-1025  
0683-4715  
0757-0442  
0757-0465  
0757-0442  
0698-8827  
0698-3136  
0698-4121  
0757-0449  
1810-0205  
0683-5625  
0683-1025  
0683-1855  
0757-0420  
0698-4435  
0757-0199  
Description  
res 2.2K 5% 1/4W  
res 15.8K 1% 1/8W  
res 47.5K 1% 1/8W  
res 90.9K 1% 1/8W  
res 3.3K 5% 1/4W  
res 2.2K 5% 1/4W  
res 475K 1% 1/8W  
res 6.19K 1% 1/8W  
res 12.1K 1% 1/8W  
res 169 1% 1/8W  
res 130 1% 1/8W  
res 806 1% 1/4W  
res 280 1% 1/8W  
res 169 1% 1/8W  
res 4.7K 5% 1/4W  
res 130 5% 1/4W  
res 270 5% 1/4W  
res 130 5% 1/4W  
res 180 5% 1/4W  
res 130 5% 1/4W  
res 270 5% 1/4W  
res 130 5% 1/4W  
res 180 5% 1/4W  
res 51 5% 1/4W  
R93  
R94,95  
R96  
R97  
R98  
R99  
R100  
R101  
R102  
R103  
R104,105  
R106  
R107  
R108  
R109  
R110  
R111  
R112  
R113  
R114  
R115  
R116,117  
R118  
R119  
R120  
R121  
R122  
R123  
R124  
R125  
R126  
R127  
R128  
R129  
R131  
R132  
R133  
R134  
R135  
R136  
R137  
R138  
res 20K 5% 1/4W  
res 21.5K 1% 1/8W  
res 2K 1% 1/8W  
res 2.2K 5% 1/4W  
res 1K 1% 1/8W  
res 10 1% 1/8W  
res 8.66K 1% 1/8W  
res 5.11K 1% 1/8W  
res 4.7K 5% 1/4W  
res 2K 5% 1/4W  
res 1K 5% 1/4W  
res 470 5% 1/4W  
res 10K 1% 1/8W  
res 100K 1% 1/8W  
res 10K 1% 1/8W  
res 1M 1% 1/8W  
res 17.8K 1% 1/8W  
res 11.3K 1% 1/8W  
res 20K 1% 1/8W  
network, sip 4.7K X7  
res 5.6K 5% 1/4W  
res 1K 5% 1/4W  
res 1.8M 5% 1/4W  
res 750 1% 1/4W  
res 2.49K 1% 1/8W  
res 21.5K 1% 1/8W  
all  
all  
89  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
R139  
R140  
R141  
R142  
R143  
R144  
R145  
R146  
R147  
R148  
R149  
R150  
Agilent Model  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
6030A,35A  
6031A,32A  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
Agilent Part Number  
0683-4725  
0683-2025  
0683-5135  
0683-6835  
0683-4725  
0757-0415  
0683-1005  
0683-1035  
0683-5115  
0757-0422  
0683-2025  
0754-0404  
0683-2715  
0683-4725  
0757-0442  
0757-0443  
0757-0451  
0757-0444  
0683-4725  
0683-1005  
0686-2005  
0680-6215  
0757-0283  
0757-0442  
0757-0283  
0757-0434  
0683-1035  
0686-1315  
0683-1515  
0757-0124  
0698-3136  
0757-0280  
0811-3174  
0683-2225  
0683-3625  
0683-1525  
0683-2225  
0683-0335  
0683-4725  
0683-1045  
0698-8827  
3101-2097  
1826-0493  
1826-0161  
1826-0346  
1826-0544  
1826-0138  
1820-0935  
1826-0065  
1826-0393  
Description  
res 4.7K 5% 1/4W  
res 2K 5% 1/4W  
res 51K 5% 1/4W  
res 68K 5% 1/4W  
res 4.7K 5% 1/4W  
res 475 1% 1/8W  
res 10 5% 1/4W  
res 10K 5% 1/4W  
res 510 5% 1/4W  
res 909 1% 1/8W  
res 2K 5% 1/4W  
res 130 5% 1/4W  
res 270 5% 1/4W  
R151  
R152  
R153  
R154  
R155  
R156  
R157  
R158  
R159,160  
R161  
R162  
R163  
R164  
R165  
R166,167  
R168  
R169  
R170  
R171  
R172  
R173  
R174  
R175  
R176  
R177  
R178,179  
R180  
R182  
S1  
res 4.7K 5% 1/4W  
res 10K 1% 1/8W  
res 11K 1% 1/8W  
res 24.3K 1% 1/8W  
res 12.1K 1% 1/8W  
res 4.7K 5% 1/4W  
res 10 5% 1/4W  
res 20 5% 1/2W  
res 620 5% 1/2W  
res 2K 1% 1/8W  
res 10K 1% 1/8W  
res 2K 1% 1/8W  
res 3.65K 1% 1/8W  
res 10K 5% 1/4W  
res 130 5% 1/2W  
res 150 5% 1/4W  
res 39.2K 1% 1/8W  
res 17.8K 1% 1/8W  
res 1K 1% 1/8W  
res 0.07 5% 5W  
res 2.2K 5% 1/4W  
res 3.6K 5% 1/4W  
res 1.5K 5% 1/4W  
res 2.2K 5% 1/4W  
res 3.3 5% 1/4W  
res 4.7K 5% 1/4W  
res 100K 5% 1/4W  
res 1M 1% 1/8W  
switch (6) lA  
U1-3  
U4,5  
U6  
U7  
U8  
U9  
U10  
U11  
IC op amp Lo-bias Hi-impedance  
IC op amp quad general purpose  
IC op amp dual general purpose  
IC voltage reference 2.5V  
IC comparator quad  
IC counter binary CMOS  
IC comparator precision  
IC voltage regulator 1.2/37V  
all  
all  
all  
all  
all  
all  
90  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
U12  
U13  
U15  
U16  
U17  
U18  
U19  
U20  
U21  
U22  
U23  
VR1  
VR2  
VR3,4  
VR5  
VR6  
W1-3  
Y1  
Agilent Model  
Agilent Part Number  
1826-0527  
1820-1287  
1820-1272  
1820-1437  
1826-0138  
1820-1205  
1820-1112  
1820-2096  
1826-0544  
1826-0428  
1826-0065  
1902-3110  
1902-0777  
1902-0018  
1902-0575  
7175-0057  
7175-0057  
0960-0586  
Description  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
IC voltage regulator 1.2/37V  
IC buffer quad NAND  
IC buffer quad NOR  
IC multivibrator monostable dual  
IC comparator quad  
IC gate dual AND  
IC flip flop D-type  
IC counter binary dual  
IC voltage reference 2.5V  
IC voltage regulator 1/40V  
IC comparator precision  
diode, zener 5.9V 2%  
diode, zener 6.2V  
diode, zener 11.7V  
diode, zener 6.5V 2%  
jumper  
jumper  
resonator, ceramic  
A2 Mechanical  
1205-0282  
1200-0485  
1200-0181  
0360-2195  
0360-2192  
all  
all  
all  
all  
all  
heat sink (Q9, U11, U12)  
IC socket (S1)  
insulator, (Q8)  
terminal block, 6-position  
terminal block, 2-position  
A3  
C1-4  
C5  
C6-9  
C10  
C11-13  
DS1-6  
DS7-12  
DS13-15  
DS16-23  
G1  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
06031-60020  
0160-5422  
0180-0374  
0160-5422  
0180-0374  
0160-5422  
1990-0835  
1990-0831  
1990-0835  
1990-0985  
06032-60006  
1251-8417  
1251-8675  
9100-1618  
1810-0272  
0683-2225  
0683-3315  
0683-4715  
0683-4715  
0683-2225  
0683-3315  
2100-1775  
0683-1015  
5060-9436  
Front Panel Board  
cap 0.047µF 20% 50V  
cap 10µF 20%  
cap 0.047µF 20% 50V  
cap 10µF 20%  
cap 0.047µF 20% 50V  
LED  
LED  
LED  
display-kit  
rotary pulse generator  
connector 16-pin  
connector 5-pin  
coil 5.6µH 10%  
network, sip 330 X9  
res 2.2K 5% 1/4W  
res 330 5% 1/4W  
res 470 5% 1/4W  
res 470 5% 1/4W  
res 2.2K 5% 1/4W  
res 330 5% 1/4W  
trimmer 5K 5%  
res 100 5% 1/4W  
switch, lighted pushbutton  
J1  
J2,3  
L1  
R1  
R2  
R3-5  
R6-38  
R40-64  
R65-68  
R69-71  
R72  
R73  
S1-5  
91  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
U1-4, 6-11  
U5  
U12  
U13  
U14  
U15  
U16  
U17  
Agilent Model  
Agilent Part Number  
1820-1433  
Description  
all  
all  
all  
all  
all  
all  
all  
all  
IC shift register, 8-bit  
IC decoder, 3-to-8 line  
IC decoder, 3-to-8 line  
IC flip flop, D-type  
IC inverter, HEX  
IC gate quad NAND  
IC shift register, 8-bit  
IC shift register, 8-bit  
1820-1216  
1820-1216  
1820-1112  
1820-1199  
1820-1197  
1820-1433  
1820-1975  
A3 Mechanical  
4040-1615  
all  
stand off (DS1-15)  
A4  
C1  
C2  
C3  
C4  
C5,6  
C7  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
06011-60023  
0160-4569  
0160-5981  
0160-4569  
0160-5981  
0160-4835  
0180-0116  
0180-0228  
1901-1418  
1901-1087  
1901-1418  
1901-0050  
2110-0671  
9100-1610  
1252-1053  
1855-0473  
1854-0585  
0811-1065  
0698-3609  
0698-5139  
0757-0466  
0698-3609  
0698-5139  
0757-0379  
0683-1505  
0683-1815  
0686-2005  
0757-0466  
0683-1815  
0757-0379  
0683-1505  
0683-0475  
0683-0275  
3103-0081  
06011-80091  
06011-80095  
1820-1050  
1902-0779  
FET Board  
cap 0.01µF 10% 800Vdc  
cap 0.047µF 10% 630Vdc  
cap 0.01µF 10% 800Vdc  
cap 0.047µF 10% 630Vdc  
cap 0.1µF 10% 50V  
cap 6.8µF 10% 35V  
cap 22µF 10% 15V  
power rectifier 600V  
power rectifier 600V  
power rectifier 600V  
diode, switching 80V 200mA  
fuse 125mAM, 125V  
coil 0.15µH 20%  
connector 64-pin  
FET N-channel  
transistor NPN Si  
res 150 5% 10W  
res 22 5% 2W  
res 3.9 5% 5W  
res 110K 1% 1/8W  
res 22 5% 2W  
res 3.9 5% 0.5W  
res 12.1 1% 1/8W  
res 15 5% 1/4W  
res 180 5% 1/4W  
res 20 5% 1/2W  
res 110K 1% 1/8W  
res 180 5% 1/4W  
res 12.1 1% 1/8W  
res 15 5% 1/4 W  
res 4.7 5% 1/4W  
res 2.7 5% 1/4W  
switch, thermal +202F  
transformer  
transformer  
IC driver dual NOR  
diode, zener 11.8V 5%  
C8  
CR1  
CR2,3  
CR4  
CR5-11  
F1,2  
L14  
P1  
Q1-4  
Q5,6  
R1-4  
R5-8  
R9-11  
R12  
R13-16  
R17-19  
R20  
R21  
R22  
R23,24  
R25  
R26  
R27  
R28  
R29-33  
R34  
TS1  
T1  
T2  
U1-3  
VR1,2  
92  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
Agilent Model  
Agilent Part Number  
Description  
A4 Mechanical  
all  
all  
all  
all  
all  
1205-0398  
1252-0093  
06032-20001  
06032-20002  
0380-1524  
heatsink (CR1,4)  
socket pin (Q1-4) (8)  
heatsink (Q1,Q2)  
heatsink (Q3,Q4)  
standoff, hex (7)  
A5  
6030A  
6031A  
6032A  
6035A  
6030A,32A,35A  
6031A  
6030A  
6031A  
6032A  
6035A  
6030A,32A,35A  
6031A  
6030A,32A  
6031A  
6035A  
6030A  
6031A  
6035A  
6035A  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
all  
6030A  
6031A  
6032A  
6035A  
6030A  
6031A  
6035A  
6030A,35A  
6031A,32A  
6030A  
6031A  
6032A  
6035A  
6030A  
06030-60024  
06011-60024  
06032-60029  
06030-60029  
0180-3167  
0160-4832  
0160-5464  
0160-5422  
0160-4569  
0160-7222  
0160-5422  
0180-3167  
0160-4832  
0160-6077  
0160-4835  
0160-5464  
0160-6077  
0160-7222  
0160-5166  
1901-0050  
1901-1127  
1901-0731  
1901-0050  
1901-0050  
1901-1542  
1901-0731  
1901-0887  
1901-1388  
1901-1542  
1901-1127  
1901-1388  
1902-3203  
2110-0546  
9170-1334  
06011-80003  
9170-0707  
5080-2132  
9170-1334  
06011-80003  
5080-2132  
9170-0894  
1252-1053  
Diode Board  
"
"
"
C1  
C2  
cap 1000µF 20% 25V  
cap 0.01µF 10% 100V  
cap 0.01µF 5% 1.5KVdc  
cap 0.047µF 20% 50V  
cap 0.01µF 10% 800Vdc  
cap 0.0022µF 10% 1600Vdc  
cap 0.047µF 20% 50Vdc  
cap 1000µF 25V  
cap 0.01µF 10% 100Vdc  
cap 0.015µF 200V  
cap 0.1µF 10% 50V  
cap 0.01µF 5% 1.5KVdc  
cap 0.015µF 200V  
cap 0.0022µF 10% 1600Vdc  
cap 0.015µF 10% 100Vdc  
diode, switching 80V 200ma  
power rectifier 150V 70A  
power rectifier 400V lA  
diode, switching 80V 200ma  
diode, switching 80V 200mA  
power rectifier 400V 50A  
power rectifier 400V lA  
power rectifier 300V 50A  
power rectifier lKV 40A  
power rectifier 400V 50A  
power rectifier 150V 70A  
power rectifier lKV 40A  
diode, zener 14.7V 5%  
fuse 5AM, 125V  
ferrite core (jumper 5080-2065)  
ferrite core (jumper 8150-4777)  
ferrite core (jumper 06012-80003)  
inductor L2  
ferrite core (jumper 5080-2065)  
ferrite core (jumper 8150-4777)  
inductor  
C3  
C4  
C5  
C7  
CR1  
CR2  
CR3  
CR4  
CR5  
CR6  
F1  
L1  
L2  
6031A  
6035A  
6030A, 35A  
all  
L3  
P1  
core shield bead (ref Q1)  
connector 64-pin  
93  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
Q1  
Agilent Model  
6030A, 35A  
6031A  
6032A  
6031A  
6032A  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
6030A,32A,35A  
6031A  
6030A, 35A  
6031A  
6032A  
6030A,32A,35A  
6031A  
6030A  
6031A  
6032A  
6035A  
6030A, 35A  
6031A  
6032A  
6031A  
6032A  
6030A, 32A, 35A  
6031A  
6030A, 32A, 35A  
6031A  
6030A  
6031A  
6032A  
6035A  
6030A  
6031A  
6032A  
6035A  
Agilent Part Number  
1855-0767  
1854-0264  
1855-0549  
1855-0549  
1854-0755  
0683-1855  
0811-3460  
0698-3151  
0686-1005  
0757-0459  
0683-1025  
0698-3202  
0757-0317  
0757-0317  
0698-4196  
0683-1045  
0698-4211  
0683-2735  
0757-0465  
0683-1025  
0698-7332  
0757-0447  
0698-8144  
0757-0428  
0757-0480  
0683-2055  
0698-3512  
0698-3601  
0698-4196  
0698-3601  
0686-1005  
0757-0447  
0698-3609  
0683-1005  
0698-3609  
0811-1746  
0757-0459  
0811-3290  
0811-0923  
0811-3729  
0683-1855  
0811-1068  
0811-3842  
0811-3729  
0698-7332  
0811-3842  
0811-3729  
0698-4444  
0811-3842  
0811-3729  
Description  
FET N-channel  
transistor NPN, Si  
FET N-channel  
FET N-channel  
Q2  
R1  
R2  
R3  
R4  
R5  
R6  
R7  
transistor NPN Si  
res 1.8M 5% 1/4W  
res 0.05 5% 5W  
res 2.87K 1% 1/8W  
res 10 5% 1/2W  
res 56.2K 1% 1/8W  
res 1K 5% 1/8 W  
res 1.74K 1% 1/8W  
res 1.33K 1% 1/8W  
res 1.33K 1% 1/8W  
res 1.07K 1% 1/8W  
res 100K 5% 1/4W  
res 158K 1% 1/8W  
res 26K 5% 1/4W  
res 100K 1% 1/8W  
res 1K 5% 1/4W  
res 1M 1% 1/8W  
res 16.2K 1% 1/8W  
res 787K 1% 1/8W  
res 1.62K 1% 1/8W  
res 432K 1% 1/8W  
res 2M 5%  
res 1.8K 1% 1/8W  
res 10 5% 2W  
res 1.07K 1% 1/8 W  
res 10 5% 2W  
res 10 5% 1/2W  
res 16.2K 1% 1/8W  
res 22 55% 2W  
res 10 5% 1/4W  
res 22 55% 2W  
res 0.36 5% 2W  
res 56.2K 1% 1/8W  
res 0.1 5% 2W  
res 0.91 5% 2W  
res 250 5% 10W  
res 1.8M 5% 1/4W  
res 50 5% 10W  
res 600 10% 10W  
res 250 5% 10W  
res 1M 1% 1/8W  
res 600 10% 10W  
res 250 5% 10W  
res 4.87K 1% 1/8W  
res 600 10% 10W  
res 250 5% 10W  
R8  
R9  
R10  
R11  
R12  
R13  
R14  
R15  
R16  
R17  
R18  
6030A  
6031A  
6035A  
6030A  
6031A  
6035A  
6030A  
94  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
R18  
Agilent Model  
Agilent Part Number  
0683-1005  
Description  
res 10 10% 1/4W  
res 600 10% 10W  
res 1.2 K% 2W  
magnetic-core (jumper 8150-4777)  
switch, thermal +202F  
IC op amp  
6031A  
6035A  
6030A, 35A  
6031A  
all  
0811-3842  
0811-3731  
9170-0061  
3103-0081  
R20  
T1  
TS1  
U1  
all  
1826-0346  
VR1  
all  
1902-0575  
diode, zener 6.5 V 2%  
A5 Mechanical  
5020-2877  
5020-2878  
0340-1123  
1251-7600  
06011-20001  
1205-0520  
1205-0398  
0380-1524  
06011-00001  
06032-00018  
1205-0398  
1251-7600  
0380-1524  
06032-00017  
6030A,35A  
6030A,35A  
6030A,35A  
6030A,35A  
6031A  
6031A  
6031A  
6031A  
6031A  
6032A  
6032A  
6032A  
6032A  
heatsink (CR5)  
heatsink (CR4, Q1)  
insulator (L1,2) (6)  
socket pin (Q1) (2)  
heatsink (CR1,CR5)  
heatsink (Q1)  
heatsink (Q2)  
standoff, hex (4)  
bracket (CR1, CR5 heatsink)  
heatsink (CR4,Q2)  
heatsink (Q1)  
socket pin (Q2) (2)  
standoff, hex (4)  
6032A  
bracket (CR4, Q2 heatsink)  
A6  
6030A,31A,32A  
6035A  
6030A,31A,32A  
6035A  
6030A,31A,32A  
6035A  
6030A,31A,32A  
6035A  
6030A,31A,32A  
6035A  
all  
6030A,31A,32A  
6035A  
all  
all  
all  
5060-3522  
06011-60028  
0160-4355  
0160-4048  
0160-4281  
0160-4439  
0160-4355  
0160-4048  
0160-4281  
0160-4439  
0160-4962  
0160-4183  
0160-4439  
0160-4962  
66000-80004  
0686-3945  
1251-5613  
AC Input Filter  
''  
C101  
C102  
C103  
C104  
cap 0.01µF 10% 250Vac  
cap 0.022µF 10% 250Vac  
cap 2200pF 20% 250Vac  
cap 0.0047µF 10% 250Vac  
cap 0.01µF 10% 250Vac  
cap 0.022µF 10% 250Vac  
cap 2200pF 20% 250Vac  
cap 0.0047µF 10% 250Vac  
cap 1µF 20% 250Vac  
cap 1000pF 20% 250Vac  
cap 0.0047µF 10% 250Vac  
cap 1µF 20% 250V  
C105  
C106, 107  
C108, 109  
L101  
R101  
choke, input  
res 390K 5% 0.5W  
connector, single  
W101-103  
all  
A6 Mechanical  
0360-2217  
all  
terminal block 3-position  
95  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
A8  
C1  
C2,3  
C4  
C5  
C6  
C7,8  
C9  
C10  
C11,12  
C13  
C14  
C15  
C16  
C22  
C23  
C24  
C25,26  
C27  
C28-31  
C32-37  
C38  
C39,40  
C41,42  
C43-47  
C48  
C49-51  
C52  
C53-58  
C59,60  
C61  
C62,63  
C64  
Agilent Model  
Agilent Part Number  
5063-3463  
0160-5422  
0160-4807  
0160-5422  
0160-4822  
0180-0197  
0160-4807  
0160-5422  
0160-4801  
0160-5422  
0160-4801  
0160-4832  
0160-5422  
0160-4801  
0180-3798  
0180-4136  
0180-0393  
0160-5422  
0180-0374  
0160-5469  
0160-5422  
0180-0116  
0160-5422  
0160-4820  
0160-5422  
0180-0116  
0160-5422  
0160-4822  
0160-5422  
0160-4822  
0160-4830  
0160-4807  
0160-5422  
0180-0393  
0160-5422  
0160-4832  
0160-4830  
0160-4801  
0160-5422  
1901-0731  
1901-1098  
1901-1080  
1901-1098  
2110-0712  
1251-7330  
1200-0485  
1252-0268  
1251-4926  
1251-4927  
1251-8417  
Description  
GPIB Board  
cap 0.047µF 20% 50V  
cap 33pF 5% 100V  
cap 0.047µF 20% 50V  
cap 1000pF 100V  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
cap 2.2µF 10% 20V  
cap 33pF 5% 100V  
cap 0.047µF 20% 50V  
cap 100pF 5% 100V  
cap 0.047µF 20% 50V  
cap 100pF 5% 100V  
cap 0.01µF 10% 50V  
cap 0.047µF 20% 50V  
cap 100pF 5% 100V  
cap 4700µF 25V  
cap 10µF 10% 20V  
cap 39µF 10% 10V  
cap 0.047µF 20% 50V  
cap 10µF 10% 20V  
cap 1µF 10% 50V  
cap 0.047µF 20% 50V  
cap 6.8µF 10% 35V  
cap 0.047µF 20% 50V  
cap 1800pF 5% 100V  
cap 0.047µF 20% 50V  
cap 6.8µF 10% 35V  
cap 0.047µF 20% 50V  
cap 1000pF 100V  
cap 0.047µF 20% 50V  
cap 1000pF 100V  
cap 2200pF 10% 250V  
cap 33pF 5% 100V  
cap 0.047µF 20% 50V  
cap 39µF 10% 10V  
cap 0.047µF 20% 50V  
cap 0.01µF 10% 50V  
cap 2200pF 10% 250V  
cap 100pF 5% 100V  
cap 0.047µF 20% 50V  
diode, power rectifier  
diode, switching  
diode, 1N5817  
diode, switching  
fuse, 4AM, 125V  
telephone jacks  
right angle socket  
GPIB connector  
connector 8-contact  
connector 16-contact  
connector 16-contact  
C65  
C66  
C67-70  
C71,73  
C142  
C143,144  
D8,9  
D13-17  
D20,21  
D22  
F1,2  
J1,2  
J3  
J4  
J5  
J6  
J7,8  
96  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
J9  
J10  
Agilent Model  
Agilent Part Number  
1251-4927  
1251-5384  
9170-1680  
9170-1454  
1853-0089  
0757-0457  
0698-3155  
0757-0442  
0698-3155  
0683-1065  
0698-4037  
0698-3155  
0757-0401  
0698-3155  
0698-0082  
0698-4037  
0757-0280  
0698-8827  
0698-3155  
0698-0082  
0698-3156  
0699-0059  
2100-3353  
0699-0642  
0757-0457  
0698-6360  
0757-0401  
0699-0059  
0757-0316  
0699-0642  
0757-0270  
2100-3353  
0757-0401  
0757-0411  
0699-0059  
0757-0316  
0699-0642  
0757-0411  
0757-0457  
0698-6360  
0757-0401  
2100-3353  
0698-3156  
2100-3732  
0698-3558  
2100-3732  
0698-3558  
0757-0280  
0698-3558  
0698-6320  
Description  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
connector 16-contact  
connector 3-contact  
choke  
L1  
L2-4  
Q1,4  
R1  
R2  
R3  
R4  
R5  
R6  
R7  
core-shield bead  
transistor 2N4917  
res 47.5 1% 1/8W  
res 4.64K 1% 1/8W  
res 10K 1% 1/8W  
res 4.64K 1% 1/8W  
res 10M 5% 1/4W  
res 46.4 1% 1/8W  
res 4.64K 1% 1/8W  
res 100 1% 1/8W  
res 4.64K 1% 1/8W  
res 464 1% 1/8W  
res 46.4 1% 1/8W  
res 1K 1% 1/8W  
res 1M 1% 1/8W  
res 4.64K 1% 1/8W  
res 464 1% 1/8W  
res 14.7K 1% 1/8W  
res 5K 0.1% 1/10W  
trimmer 20K 10%  
res 10K 0.1% 1/10W  
res 47.5K 1% 1/8W  
res 10K 0.1% 1/8W  
res 100 1% 1/8W  
res 5K 0.1% 1/10W  
res 42.2 1% 1/8W  
res 10K 0.1% 1/10W  
res 249K 1% 1/8W  
trimmer 20K 10%  
res 100 1% 1/8W  
res 332 1% 1/8W  
res 5K 0.1% 1/10W  
res 42.2 1% 1/8W  
res 10K 0.1% 1/10W  
res 332 1% 1/8W  
res 47.5K 1% 1/8W  
res 10K 0.1% 1/8W  
res 100 1% 1/8W  
trimmer 20K 10%  
res 14.7K 1% 1/8W  
trimmer 500 10%  
res 4.02K 1% 1/8W  
trimmer 500 10%  
res 4.02K 1% 1/8W  
res 1K 1% 1/8W  
R8-11  
R12  
R14  
R15-17  
R18  
R19  
R20-22  
R23  
R24,26  
R28  
R29  
R30  
R32  
R33  
R34  
R35  
R36  
R37  
R39  
R40  
R41  
R42  
R43  
R44  
R45  
R46  
R48  
R49  
R50  
R51  
R52  
R55,58  
R59,60  
R61  
R62-64  
R65  
R66  
R67  
res 4.02K 1% 1/8W  
res 5K 0.1% 1/8W  
97  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
R68  
R69  
R70  
R71  
R72  
R73  
R74  
R75  
R76  
R78  
R79,80  
R82  
R83-88  
R89  
R90,98,99  
R101  
R102  
R103  
R106  
R109,110  
R111  
R112  
S1  
Agilent Model  
Agilent Part Number  
0757-0400  
0698-6320  
0757-0400  
0698-6320  
0757-0400  
0757-0451  
0757-0199  
2100-3273  
0698-3455  
0698-3156  
8159-0005  
0698-0082  
0698-3155  
0757-0280  
0698-3155  
0698-6360  
0698-3558  
0698-3455  
1810-0206  
0698-3155  
0757-0316  
1810-0305  
3101-1973  
0360-2312  
1826-0468  
5080-2157  
1820-8773  
1826-1369  
5080-2624  
1826-2187  
1818-4134  
1826-2187  
1826-2187  
1820-3210  
1990-0543  
1821-1479  
1820-2724  
1826-0161  
1826-0609  
1826-1475  
1826-1896  
1990-1387  
1820-6789  
1990-1387  
1826-0536  
5080-2156  
5080-2625  
1820-4185  
1826-1896  
1818-4932  
Description  
res 90.9 1% 1/8W  
res 5K 0.1% 1/8W  
res 90.9 1% 1/8W  
res 5K 0.1% 1/8W  
res 90.9 1% 1/8W  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
res 24.3K 1% 1/8W  
res 21.5K 1% 1/8W  
trimmer 2K 10%  
res 261K 1% 1/8W  
res 14.7K 1% 1/8W  
res 0 ohm  
res 464 1% 1/8W  
res 4.64K 1% 1/8W  
res 1K 1% 1/8W  
res 4.64K 1% 1/8W  
res 10K 0.1% 1/8W  
res 4.02K 1% 1/8W  
res 261K 1% 1/8W  
network, sip 10K X7  
res 4.64K 1% 1/8W  
res 42.2 1% 1/8W  
network, sip 4.7K X8  
GPIB switch  
TBl  
U1  
U2  
U4  
U5  
U6  
U7  
U8  
terminal block 4-contact  
IC MC3423P1 0V-level detect  
IC GAL programmed  
IC 80C51 microprocessor  
IC LT1021 voltage regulator 10V  
IC EPROM AM27512  
IC converter PM-7545  
IC RAM MCM6164C55  
IC converter PM-7545  
IC converter PM-7545  
IC UART MC68B50P  
IC opto-isolator  
U9  
U11  
U12  
U13  
U14  
U16  
U19  
U20  
U24  
U25  
U28  
U31  
U32  
U33  
U35  
U36  
U37  
U64-69  
U70  
IC 80C196 microprocessor  
IC latch 74HC373  
IC LM324N quad op amp  
IC 8-input multiplexer  
IC LT1011 comparator  
IC LT1001 op amp  
IC opto-isolator  
IC 75176B RS485 driver  
IC opto-isolator  
IC LM340AK-5 voltage regulator 5V  
IC GAL programmed  
IC GAL programmed  
IC DS3658N interface  
IC LT1001 op amp  
IC EEPROM NMC9346  
98  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
U115  
U116  
U117  
VR2  
VR3,4  
VR6,7,8  
Y1,2  
Agilent Model  
Agilent Part Number  
1820-6045  
Description  
all  
all  
all  
all  
all  
all  
all  
IC SN75ALS61610  
IC SN75ALS6160  
IC 9914 talker/listener  
diode, zener 11V  
diode, zener 6.19V  
diode, zener 18.2V  
oscillator 12MHz  
1820-6170  
1821-1740  
1902-3172  
1902-0049  
1902-0766  
0410-2109  
A8 Mechanical  
1205-0564  
all  
all  
heat sink (U33)  
GPIB mounting plate  
5001-6732  
A9  
C1,2  
C3  
CR1  
CR2,3  
R1-4  
6035A  
6035A  
6035A  
6035A  
6035A  
6035A  
5060-3401  
0180-4231  
0160-2569  
1901-0325  
1901-0759  
0764-0027  
Output Board  
cap 750µF 350V  
cap 0.02µF 2KV  
diode 700V 35A  
diode 600V 3A  
res 75K 5% 2W  
Chassis Electrical  
3160-0097  
0160-2569  
0180-3703  
0180-3493  
0180-3491  
3105-0126  
5080-2307  
3101-0402  
06032-60003  
8120-4352  
06032-60002  
8120-4356  
B1  
C6  
C2  
all  
fan  
6030A  
6030A  
6031A  
6032A  
all  
all  
all  
all  
all  
cap 0.02µF 20% 2KVdc (output board)  
cap 1500µF 250V (output board)  
cap 10000µF 40V (output board)  
cap 2600µF 75V (output board)  
circuit breaker 25A 250Vac  
choke (input line) 380µH  
switch DPST (on/off)  
CB1  
L4  
S3  
W1  
W2  
W3  
W5,6  
ribbon cable (A3 to A8)  
cable assembly, 3-pin (A1 to A8)  
cable assembly, 5-pin (A2 to A3)  
ribbon cable (A2 to A8)  
all  
all  
Chassis Mechanical  
06032-00025  
5021-8403  
all  
all  
all  
chassis  
front frame casting  
top trim strip  
5041-8802  
all  
all  
5001-0539  
side trim strip (2)  
front sub-panel  
06032-00015  
06030-00012  
06031-00013  
06032-00023  
06035-00001  
01650-47401  
2190-0736  
6030A  
6031A  
6032A  
6035A  
all  
front panel, screened  
front panel, screened  
front panel, screened  
front panel, screened  
knob, RPG adjust  
spacer  
all  
all  
all  
all  
all  
5041-0309  
5041-2089  
4040-1954  
06032-00011  
06032-00012  
plain key cap (4)  
lettered key cap (LCL)  
display window  
fan baffle  
all  
dc output plate (lettered)  
99  
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Table 5-3. Replaceable Parts List (continued)  
Ref. Desig  
Agilent Model  
Agilent Part Number  
Chassis Mechanical  
(cont)  
Description  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
all  
06032-00010  
0340-1095  
0380-1362  
1510-0044  
0400-0086  
5001-6739  
5001-6738  
06032-00024  
5040-1626  
5040-1627  
output buss bar (2)  
insulator for bus bar (4)  
standoff, 12mrn (buss bar) (2)  
binding post, rear panel ground  
insulated bushing (under A6) (2)  
cover, top  
cover, bottom  
cover, internal (lettered)  
cover, dc output  
cover, ac input  
strain relief (line cord)  
strap handle (2)  
handle retainer, front (2)  
handle retainer, back (2)  
foot (4)  
5040-1625  
5062-3703  
5041-8819  
5041-8820  
5041-8801  
100  
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6
Component Location and Circuit Diagrams  
This chapter contains component location diagrams, schematics, and other drawings useful for maintenance of the power  
supply. Included in this section are:  
a. Component location illustrations (Figures 6-1 through 6-9), showing the physical location and reference designators of  
almost all electrical parts. (Components located on the rear panel are easily identified.)  
b. Notes (Table 6-1) that apply to all schematic diagrams.  
c. Schematic diagrams (Figures 6-10 through 6-13).  
AC line voltage is present on the A1 Main Board Assembly whenever the power cord is connected to an ac  
power source.  
Table 6-1. Schematic Diagram Notes  
1.  
2.  
3.  
denotes front-panel marking.  
denotes rear-panel marking.  
.
Complete reference designator consists of component reference designator prefixed with assembly number (e.g.:  
A2R14).  
4.  
Resistor values are in ohms. Unless otherwise noted, resistors are either 1/4W, 5% or 1/8W, 1%. Parts list provides  
power rating and tolerance for all resistors.  
5.  
6.  
Unless otherwise noted, capacitor values are in microfarads.  
Square p.c. pads indicate one of the following:  
a. pin 1 of an integrated circuit.  
b. the cathode of a diode or emitter of a transistor.  
c. the positive end of a polarized capacitor.  
7.  
Schematic components marked with an asterisk (*) indicate that different values are used in each model. Refer to the  
parts list for the applicable values.  
8.  
9.  
Schematic components marked with a dagger († ) are listed under chassis, electrical in the parts list.  
This capacitor is only used on 6030A and 6035A units. C6 is mounted on the chassis on 6030A units. C3 is mounted  
on the A9 board on 6035A units.  
10.  
11.  
indicates multiple paths represented by only one line. Reference designators with pin  
numbers indicate destination, or signal names identify individual paths. Numbers  
indicate number of paths represented by the line.  
Inter-board commons have letter identifications (e.g.: ); commons existing on a single assembly have number  
identifications (e.g.:  
).  
101  
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Table 6-1. Schematic Diagram Notes (continued)  
For single in-line resistor packages, pin 1 is marked with a dot. For integrated circuit packages, pin 1 is either marked with  
a dot, or pin 1 is to the left (as viewed from top) of indentation on the integrated circuit package (except for A8U6 and  
A8U8).  
102  
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Figure 6-1. Top View, Top Covers Removed  
103  
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Figure 6-2A. 6030A/35A Main Board (A1) and Output Filter Component Location  
104  
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Figure 6-2B. 6031A Main Board (A1) and Output Filter Component Location  
105  
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Figure 6-2C. 6032A Main Board (A1) and Output Filter Component Location  
106  
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Figure 6-4. Front Panel Board (A3)  
Component Location  
Figure 6-3. Control Board (A2) Component Location  
107  
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Figure 6-5. FET Board (A4) Component Location  
108  
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Figure 6-6A. 6030A/35A Diode Board (A5) Component Location  
Figure 6-6B. 6031A Diode Board (A5) Component Location  
109  
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Figure 6-6C. 6032A Diode Board (A5) Component Location  
Figure 6-7. AC Input Filter (A6) Component Location  
110  
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Figure 6-8. GPIB Board (A8) Component Location  
111  
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Figure 6-9. 6035A Output Board (A9) Component Location  
112  
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Figure 6-13A. GPIB Board Schematic Diagram  
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Figure 6-13B. GPIB Board Schematic Diagram  
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A
l00 Vac Input Power Option 100  
General Information  
Description  
Option 100 is a modification of Agilent 6030A/31A/32A/35A power supplies that involves changing resistors on the A2  
board, recalibrating the supply, and changing the Front Panel. These changes allow the units to operate at a lower line  
voltage of 87 to 106 Vac, while operating on the same line frequency of 48 to 63 Hz. The reduced input voltage limits the  
output power to approximately 700 watts. Other specifications that change due to Option 100 include Programming  
Response Time, Overvoltage Protection and Remote Analog Programming.  
Scope of Appendix A  
This appendix contains all the information necessary to support Agilent 6033A/31A/32A/35A power supplies that are  
equipped with Option 100. The appendix describes only the changes pertaining to Option 100 and how they affect the other  
portions of this manual. Unless otherwise specified in Appendix A, all other portions of the annual apply to both the  
standard unit and the Option 100 unit.  
Suggestions for Using Appendix A  
The Option 100 changes are listed sequentially, starting with Chapter 1 in the main body of the manual and working back  
through Chapter 6. It is recommended that the user mark all the necessary changes directly into his manual. This will update  
the manual for Option 100 and eliminate the need for constant referrals back to Appendix A.  
Chapter 1 Manual Changes  
On Page 9, in Scope change the output power from 1000 to 700 watts.  
Chapter 2 Manual Changes  
On Page 17, in Constant Voltage Full Scale Calibration step b, and Voltage Monitor and Remote Readback Full Scale  
Calibration step b, change the VSET values to:  
VSET 170 (6030A)  
VSET 50 (6032A)  
VSET 425 (6035A)  
119  
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On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step d, change the A8R58 adjustment to:  
170.025 6mV (6032A)  
50.0075 1.52mV (6032A)  
425.063 6µV (6035A)  
On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step c, change 5.000625V to:  
4.250625V 100µV (6030A/35A)  
4.167187V 100µV (6032A)  
On Page 17, in Voltage Monitor and Remote Readback Full Scale Calibration step f, change the A8R61 adjustment to  
between:  
170.00 and 170.50Vdc (6030A)  
50.00 and 50.025Vdc (6032A)  
425.00 and 425.125Vdc (6035A)  
On Page 20, in Power Limit Calibration step a, change 240 Vdc to 206 Vdc.  
On Page 20, in Power Limit Calibration step b, change the load resistor as follows:  
2.9 ohm 1500 W (6030A)  
0.05 ohm 1500 W (6031A)  
0.29 ohm 1500 W (6032A)  
32 ohm 1500 W (6035A)  
On Page 20, in Power Limit Calibration step e, change the VSET values to:  
VSET 50 (6030A)  
VSET 6 (6031A)  
VSET 14.5 (6032A)  
VSET 163 (6035A)  
On Page 20, in Power Limit Calibration step f, change the output values to:  
50 1V (6030A)  
6
0.08V (6031A)  
14.5 0.1V (6032A)  
163 1V (6035A)  
On Page 20, in Power Limit Calibration step g, change the current and resistor settings to:  
32 ohm 1500W (6030A)  
0.50 ohm 1500W (6031A)  
2.8 ohm 1500W (6032A)  
212 ohm 1500W (6035A)  
On Page 20, in Power Limit Calibration step i, change the VSET or ISET values to:  
VSET 170 (6030A)  
ISET 40 (6031A)  
VSET 50; ISET 18 (6032A)  
VSET 425 (6035A)  
On Page 21, in Power Limit Calibration step j, change the output values to:  
170 2V (6030A)  
@40A (6031A)  
50 0.4V @17.5A (6032A)  
425 0.4V @2A (6035A)  
120  
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On Page 21, in Electronic load, make the following resistor changes:  
from 40 to 36 ohms (6030A)  
from 0.4 to 0.57 ohms (6031A)  
from 3.5 to 3 ohms (6032A)  
from 250 to 300 ohms (6035A)  
from 3.5 to 2.4 ohms (6030A)  
from 0.069 to 0.043 ohms (6031A)  
from 0.4 to 0.27 ohms (6032A)  
from 40 to 30 ohms (6035A)  
On Page 23, in Voltage Programming and Readback Accuracy step g, change the VSET values to:  
VSET 170 (6030A)  
VSET 50 (6032A)  
VSET 425 (6035A)  
On Page 23, in Voltage Programming and Readback Accuracy step h, change the range values to:  
169.796 to 170.205Vdc (6030A)  
49.9375 to 50.0525Vdc (6032A)  
423.538 to 426.462Vdc (6035A)  
On Page 23, in Voltage Programming and Readback Accuracy step i, change the values to:  
0.216Vdc (6030A)  
0.060Vdc (6032A)  
2.325Vdc (6035A)  
On Page 23, in Load Effect (Load Regulation) step c, change the output voltage to:  
42Vdc (6030A)  
5.2Vdc (6031A)  
13.5Vdc (6032A)  
150Vdc (6035A)  
On Page 24, in Load Effect (Load Regulation) step h, change the values to:  
0.009Vdc (6030A)  
0.0035Vdc (6031A)  
0.006Vdc (6032A)  
0.028Vdc (6035A)  
On Page 24, in Source Effect (Line Regulation) step d, change the output voltage to:  
170Vdc (6030A)  
50Vdc (6032A)  
425Vdc (6035A)  
On Page 25, in Source Effect (Line Regulation) step e, change the output current to:  
4.7Adc (6030A)  
35Adc (6032A)  
16Adc (6035A)  
1.38Adc (6035A)  
On Page 25, in Source Effect (Line Regulation) step i, change the values to:  
0.022Vdc (6030A)  
0.008Vdc (6032A)  
0.055Vdc (6035A)  
121  
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On Pages 25-27, in RMS Measurement Procedure, Peak Measurement and Load Transient Recovery Time, change the  
output voltage to  
42Vdc (6030A)  
5.2Vdc (6031A)  
13.5Vdc (6032A)  
150Vdc (6035A)  
On Page 28 and 29, in paragraph Current Programming and Readback Accuracy steps c and g, change the VSET values to:  
VSET 170 (6030A)  
VSET 50 (6032A)  
VSET 425 (6035A)  
On Page 29, in Load Effect (Load Regulation) step c, change the output current to:  
4.7Adc (6030A)  
35Adc (6032A)  
16Adc (6035A)  
1.38Adc (6035A)  
On Page 29, in Load Effect (Load Regulation) step cd change the output voltage to:  
170Vdc (6030A)  
50Vdc (6032A)  
425Vdc (6035A)  
On Page 30, in Source Effect (Line Regulation) step d, change the output current to:  
17Adc (6030A)  
120Adc (6032A)  
50Adc (6035A)  
5Adc (6035A)  
On Page 30, in Source Effect (Line Regulation) step e, change the output voltage to:  
42Vdc (6030A)  
5.2Vdc (6031A)  
13.5Vdc (6032A)  
150Vdc (6035A)  
On Page 30, in PARD Ripple and Noise, make the following resistor changes:  
from 3.5 to 2.4 ohms (6030A)  
from 0.069 to 0.043 ohms (6031A)  
from 0.4 to 0.27 ohms (6032A)  
from 40 to 30 ohms (6035A)  
On Page 30, Initialization, change step 2 as follows:  
2. Turn the power on, and depending on your unit's model number, send the following strings:  
"EEINIT 6030"  
''EEINIT 6031''  
"EEPROM 10,4,175.00"  
''EEPROM 10,4,17.5"  
''EEINIT 6032"  
"EEINIT 6035"  
"EEPROM 10,4,51.495"  
"EEPROM 10,4,437.50"  
122  
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Chapter 3 Manual Changes:  
On Page 45, in Readback Multiplexer (U20), change Node U20-9, Measurement from + 5V to:  
+ 4.25V (6030A/31A/35A)  
+ 4.167V (6032A)  
On Page 53 in Main Troubleshooting and on Page 54 in Troubleshooting No-Out Failures step d, change 320Vdc to  
250Vdc.  
Chapter 4 Manual Changes:  
On Page 74 In Power Mesh and Input Circuits, change 320Vdc to 250Vdc.  
Chapter 5 and 6 Manual Changes  
On Page 86, change the A2 board from:  
06030-60022 to 06030-60026 (6030A)  
06011-60022 to 06031-60026 (6031A)  
06032-60022 to 06032-60026 (6032A)  
06030-60028 to 06035-60020 (6035A)  
On Page 91 and on the schematic diagram Figure 6-10, change R81 to:  
1.82K, 1% 1/8W Agilent P/N 0757-0429 (6030A, 6035A only)  
1.78K, 1% 1/8W Agilent P/N 0757-0278 (6032A only)  
On Page 92 and on the schematic diagram Figure 6-10, change R92 to:  
10K, 1% 1/8W Agilent P/N 0757-0442 (6030A, 6035A only)  
34.8K, 1% 1/8W Agilent P/N 0757-0123 (6031A only)  
11.5K, 1% 1/8W Agilent P/N 0698-5383 (6032A only)  
On Page 94, add option 100 label (A2 board) 9320-5540.  
On Page 102, change front panel from:  
06030-00012 to 06030-00011 (6030A)  
06031-00013 to 06031-00012 (6031A)  
06032-00023 to 06032-00022 (6032A)  
06035-00001 to 06035-00003 (6035A)  
On Page 103, add line voltage label (rear panel) Agilent P/N 06032-81004.  
123  
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B
Blank Front Panel Option 001  
Introduction  
This appendix describes the blank front panel option (Option 001) for the Agilent 6030A/31A/32A power supplies. Option  
001 is designed for applications in which front panel operation and monitoring are unnecessary. It has no front-panel  
controls and indicators except for the LINE switch and OVP ADJUST control found on the standard unit, and a pilot light  
to indicate when ac input power is turned on. All other characteristics of the standard are retained.  
Except for references to front-panel controls and indicators, most of the information in the manual applies to Option 001  
units. No attempt has been made in this appendix to change every reference to front-panel controls and indicators. In  
general, information in this appendix replaces only those procedures whose modification may not be obvious to the user.  
When reading the manual, the user can usually skip over references to front-panel controls and indicators other than the  
LINE switch and OVP ADJUST control.  
Troubleshooting  
The major difference between troubleshooting an Option 001 unit and a standard power supply is that the front panel is not  
available to help you isolate the problem to a specific section in the power supply. If you know which section of the supply  
is defective, simply go to that section in the troubleshooting procedure and troubleshoot as described in Chapter 3.  
To help you isolate the problem to a specific area of the supply, use the flowchart provided in this section.  
If you cannot isolate the problem using the flowchart, you could replace the blank front panel of your supply with a standard  
front panel and then troubleshoot the unit. Part numbers for front panel assemblies are provided in Chapter 5.  
Chapter 2 Manual Changes:  
On Page 20 Power Limit Calibration, change step f to read: Connect a DVM to control board test connector A2J7 pin 16  
(CC). Observe the DVM while adjusting A2R25 (POWER LIMIT) clockwise. Stop adjusting as soon as test point A2J7-16  
goes from high to low.  
Note:  
You can also send an STS? query (or SCPI equivalent) in a looping program and monitor when the power  
supply status changes to CC mode.  
Under the Performance Tests section, any references to front panel control will have to be accomplished using GPIB  
commands. Use the following guidelines:  
1. To set the voltage and current to specific values, use the VSET and ISET (or SCPI equivalent) commands.  
2. If the procedure says to check the CC or CV LED's, use an STS? query (or SCPI equivalent). A returned value of 1  
indicates CV mode; a value of 2 indicates CC mode.  
125  
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Chapter 3 Manual Changes:  
Replace Figure 3-1 with the figure on the next page. SA Tables 3-5 through 3-7 do not apply to Option 001 units.  
Chapter 5 and 6 Manual Changes:  
On Page 94 under A3 Front Panel Board, the only part that applies to the Option 001 unit is R72, the OVP-adjust  
potentiometer. Change R72 from 2100-1775 to 2100-4060.  
On Page 102 under Chassis Electrical, add Neon Pilot Light, P/N 1450-0647. Also add OVP Cable (R72), P/N 06032-  
60004. Under Chassis Mechanical, change screened front panel to:  
06030-00010 (6030A)  
06031-00011 (6031A)  
06032-00021 (6032A)  
On Figure 6-9, add the neon pilot light in series with R8, 33K, across pins 4 and 5 of transformer T3.  
On Figure 6-12, the only part that applies to the Option 001 unit is R72, the OVP-adjust potentiometer.  
126  
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Figure 3-1. Troubleshooting Isolation (option 001)  
127  
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C
Agilent 6030A Test Record  
Performance Test Record - Agilent 6030A POWER SUPPLY (Page 1 of 2)  
Test Facility:  
__________________________________________  
__________________________________________  
__________________________________________  
__________________________________________  
Report No.__________________________________________  
Date_______________________________________________  
Customer___________________________________________  
Tested By___________________________________________  
Model  
Agilent 6030A  
Ambient Temperature _______________________________°C  
Relative Humidity ___________________________________%  
Nominal Line Frequency ____________________Hz (nominal)  
Serial No.__________________________________  
Options ____________________________________  
Firmware Revision ___________________________  
Special Notes:  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
Test Equipment Used  
Description  
Model No.  
Trace No.  
Cal. Due Date  
1. AC Source  
_______________  
Agilent 3458A  
Agilent 3400A  
Agilent 54504A  
Agilent 6050A and  
Agilent 60503A  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_________________  
_________________  
_________________  
_________________  
_________________  
2. DC Voltmeter  
3. RMS Voltmeter  
4. Oscilloscope  
5. Electronic Load  
6. Current Probe  
7. Current Shunt  
_______________  
Guildline 9230/100  
_______________  
_______________  
_______________  
_______________  
_______________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_______________  
_______________  
_______________  
_______________  
_______________  
129  
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Performance Test Record - Agilent 6030A POWER SUPPLY (Page 2 of 2)  
Report No.______________  
Date_____________________  
MODEL Agilent 6030A  
Test Description  
Page  
No.  
Minimum Spec.  
Results  
Maximum  
Spec.  
Measurement  
*
Uncertainty  
Constant Voltage Tests  
23  
Voltage Programming  
and Readback  
Low Voltage (0.500V)  
Front Panel Display  
GPIB Readback  
0.354  
________V  
________V  
________V  
0.645  
7µV  
7µV  
7µV  
V
OUT - 0.065  
OUT - 0.080  
VOUT + 0.065  
V
V
OUT + 0.080  
High Voltage (200V)  
Front Panel Display  
GPIB Readback  
199.785  
________V  
________V  
________V  
200.215  
2.7mV  
2.7mV  
2.7mV  
VOUT - 0.72  
VOUT + 0.72  
VOUT + 0.24  
VOUT - 0.24  
23  
24  
Load Effect (60.0V)  
Source Effect (200V)  
V
OUT - 0.011  
OUT - 0.011  
_______mV  
_______mV  
VOUT + 0.011  
VOUT + 0.011  
40µV  
V
350µV  
PARD (Ripple and Noise)  
RMS  
Peak-to-Peak  
25  
26  
0
0
0
_______mV  
_______mV  
_______mV  
0.022  
0.050  
3.3mV  
1.5mV  
18mV  
27  
Transient Recovery  
0.150/2ms  
(90% to 100% Full Load)  
Constant Current Tests  
28  
Current Programming  
and Readback  
Low Current (0.50A)  
Front Panel Display  
GPIB Readback  
0.475  
________A  
0.525  
220µA  
220µA  
220µA  
7mA  
I
I
OUT - 0.017  
OUT - 0.017  
16.941  
________A  
________A  
________A  
________A  
________A  
________mA  
IOUT + 0.017  
I
OUT + 0.017  
High Current (17.0A)  
Front Panel Display  
GPIB Readback  
17.059  
I
I
I
OUT - 0.081  
OUT - 0.076  
OUT - 0.010  
IOUT + 0.081  
OUT + 0.076  
7mA  
I
7mA  
29  
29  
30  
Load Effect (5.0A)  
IOUT + 0.010  
IOUT + 0.006  
0.015  
2µA  
Source Effect (17.0A)  
PARD (Ripple and Noise)  
I
OUT - 0.006  
0
________mA  
________mA  
15µA  
2mA  
130  
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D
Agilent 6031A Test Record  
Performance Test Record - Agilent 6031A POWER SUPPLY (Page 1 of 2)  
Test Facility:  
__________________________________________  
__________________________________________  
__________________________________________  
__________________________________________  
Report No.__________________________________________  
Date_______________________________________________  
Customer___________________________________________  
Tested By___________________________________________  
Model  
Agilent 6031A  
Ambient Temperature _______________________________°C  
Relative Humidity ___________________________________%  
Nominal Line Frequency ____________________Hz (nominal)  
Serial No.__________________________________  
Options ____________________________________  
Firmware Revision ___________________________  
Special Notes:  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
Test Equipment Used  
Description  
Model No.  
Trace No.  
Cal. Due Date  
1. AC Source  
_______________  
Agilent 3458A  
Agilent 3400A  
Agilent 54504A  
Agilent 6050A and  
Agilent 60504A  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_________________  
_________________  
_________________  
_________________  
_________________  
2. DC Voltmeter  
3. RMS Voltmeter  
4. Oscilloscope  
5. Electronic Load  
6. Current Probe  
7. Current Shunt  
_______________  
Guildline 9230/300  
_______________  
_______________  
_______________  
_______________  
_______________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_______________  
_______________  
_______________  
_______________  
_______________  
131  
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Performance Test Record - Agilent 6031A POWER SUPPLY (Page 2 of 2)  
Report No.______________  
Date_____________________  
MODEL Agilent 6031A  
Test Description  
Page  
No.  
Minimum Spec.  
Results  
Maximum  
Spec.  
Measurement  
*
Uncertainty  
Constant Voltage Tests  
23  
Voltage Programming  
and Readback  
Low Voltage (0.10V)  
Front Panel Display  
GPIB Readback  
0.085  
________V  
________V  
________V  
0.115  
3µV  
3µV  
3µV  
VOUT - 0.007  
VOUT + 0.007  
V
OUT - 0.007  
V
OUT + 0.007  
High Voltage (20.0V)  
Front Panel Display  
GPIB Readback  
19.978  
________V  
________V  
________V  
20.022  
335µV  
335µV  
335µV  
V
OUT - 0.028  
OUT - 0.023  
VOUT + 0.028  
OUT + 0.023  
V
V
23  
24  
Load Effect (7.0V)  
V
OUT - 0.0037  
_______mV  
_______mV  
VOUT + 0.0037  
VOUT + 0.004  
1µV  
Source Effect (20.0V)  
V
OUT - 0.004  
20µV  
PARD (Ripple and Noise)  
RMS  
Peak-to-Peak  
25  
26  
0
0
0
_______mV  
_______mV  
_______mV  
0.008  
0.050  
1.2mV  
1.5mV  
12mV  
27  
Transient Recovery  
0.100/2ms  
(90% to 100% Full Load)  
Constant Current Tests  
28  
Current Programming  
and Readback  
Low Current (0.50A)  
Front Panel Display  
GPIB Readback  
0.248  
________A  
0.751  
220µA  
220µA  
220µA  
50mA  
50mA  
50mA  
25µA  
I
I
OUT - 0.303  
OUT - 0.102  
119.450  
________A  
________A  
________A  
________A  
________A  
________mA  
IOUT + 0.303  
I
OUT + 0.102  
120.550  
High Current (120A)  
Front Panel Display  
GPIB Readback  
I
I
I
OUT - 1.140  
OUT - 0.580  
OUT - 0.020  
IOUT + 1.140  
OUT + 0.580  
I
29  
29  
30  
Load Effect (50.0A)  
IOUT + 0.020  
IOUT + 0.037  
0.120  
Source Effect (120A)  
PARD (Ripple and Noise)  
IOUT - 0.037  
0
________mA  
________mA  
136mA  
18mA  
132  
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E
Agilent 6032A Test Record  
Performance Test Record - Agilent 6032A POWER SUPPLY (Page 1 of 2)  
Test Facility:  
__________________________________________  
__________________________________________  
__________________________________________  
__________________________________________  
Report No.__________________________________________  
Date_______________________________________________  
Customer___________________________________________  
Tested By___________________________________________  
Model  
Agilent 6032A  
Ambient Temperature _______________________________°C  
Relative Humidity ___________________________________%  
Nominal Line Frequency ____________________Hz (nominal)  
Serial No.__________________________________  
Options ____________________________________  
Firmware Revision ___________________________  
Special Notes:  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
Test Equipment Used  
Description  
Model No.  
Trace No.  
Cal. Due Date  
1. AC Source  
_______________  
Agilent 3458A  
Agilent 3400A  
Agilent 54504A  
Agilent 6050A and  
Agilent 60504A  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_________________  
_________________  
_________________  
_________________  
________________  
2. DC Voltmeter  
3. RMS Voltmeter  
4. Oscilloscope  
5. Electronic Load  
6. Current Probe  
7. Current Shunt  
_______________  
Guildline 9230/100  
_______________  
_______________  
_______________  
_______________  
_______________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_______________  
_______________  
_______________  
_______________  
_______________  
133  
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Performance Test Record - Agilent 6032A POWER SUPPLY (Page 2 of 2)  
Report No.______________  
Date_____________________  
MODEL Agilent 6032A  
Test Description  
Page  
No.  
Minimum Spec.  
Results  
Maximum  
Spec.  
Measurement  
*
Uncertainty  
Constant Voltage Tests  
23  
Voltage Programming  
and Readback  
Low Voltage (0.090V)  
Front Panel Display  
GPIB Readback  
0.050  
________V  
________V  
________V  
0.130  
3µV  
3µV  
3µV  
V
OUT - 0.020  
OUT - 0.020  
VOUT + 0.020  
V
V
OUT + 0.020  
High Voltage (60.0V)  
Front Panel Display  
GPIB Readback  
59.939  
________V  
________V  
________V  
60.061  
845µV  
845µV  
845µV  
V
OUT - 0.118  
OUT - 0.068  
VOUT + 0.118  
OUT + 0.068  
V
V
23  
24  
Load Effect (20.0V)  
Source Effect (60.0V)  
V
OUT - 0.007  
OUT - 0.009  
_______mV  
_______mV  
VOUT + 0.007  
VOUT + 0.009  
20µV  
40µV  
V
PARD (Ripple and Noise)  
RMS  
Peak-to-Peak  
25  
26  
0
0
0
_______mV  
_______mV  
_______mV  
0.006  
0.040  
900µV  
1.2mV  
12mV  
27  
Transient Recovery  
0.100/2ms  
(90% to 100% Full Load)  
Constant Current Tests  
28  
Current Programming  
and Readback  
Low Current (0.50A)  
Front Panel Display  
GPIB Readback  
0.414  
________A  
0.586  
220µA  
220µA  
220µA  
20mA  
20mA  
20mA  
15µA  
I
I
OUT - 0.041  
OUT - 0.036  
49.815  
________A  
________A  
________A  
________A  
________A  
________mA  
IOUT + 0.041  
I
OUT + 0.036  
50.185  
High Current (50.0A)  
Front Panel Display  
GPIB Readback  
I
I
I
OUT - 0.270  
OUT - 0.215  
OUT - 0.011  
IOUT + 0.270  
OUT + 0.215  
I
29  
29  
30  
Load Effect (16.5A)  
IOUT + 0.011  
IOUT + 0.015  
0.025  
Source Effect (50.0A)  
PARD (Ripple and Noise)  
I
OUT - 0.015  
0
________mA  
________mA  
25µA  
3.7A  
134  
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F
Agilent 6035A Test Record  
Performance Test Record - Agilent 6035A POWER SUPPLY (Page 1 of 2)  
Test Facility:  
__________________________________________  
__________________________________________  
__________________________________________  
__________________________________________  
Report No.__________________________________________  
Date_______________________________________________  
Customer___________________________________________  
Tested By___________________________________________  
Model  
Agilent 6035A  
Ambient Temperature _______________________________°C  
Relative Humidity ___________________________________%  
Nominal Line Frequency ____________________Hz (nominal)  
Serial No.__________________________________  
Options ____________________________________  
Firmware Revision ___________________________  
Special Notes:  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
____________________________________________________________________________________________  
Test Equipment Used  
Description  
Model No.  
Trace No.  
Cal. Due Date  
1. AC Source  
_______________  
Agilent 3458A  
Agilent 3400A  
Agilent 54504A  
Agilent 6050A and  
Agilent 60503A  
_______________  
Guildline 9230/15  
250 ohms 1%  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_________________  
_________________  
_________________  
_________________  
_________________  
2. DC Voltmeter  
3. RMS Voltmeter  
4. Oscilloscope  
5. Electronic Load  
6. Current Probe  
7. Current Shunt  
8. Power Resistor  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_____________________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_________________  
_________________  
1KW (min.)  
_______________  
_______________  
_______________  
_______________  
_______________  
_______________  
135  
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Performance Test Record - Agilent 6035A POWER SUPPLY (Page 2 of 2)  
Report No.______________  
Date_____________________  
MODEL Agilent 6035A  
Test Description  
Page  
No.  
Minimum Spec.  
Results  
Maximum  
Spec.  
Measurement  
*
Uncertainty  
Constant Voltage Tests  
23  
Voltage Programming  
and Readback  
Low Voltage (1.00V)  
Front Panel Display  
GPIB Readback  
0.598  
________V  
________V  
________V  
1.400  
12µV  
12µV  
12µV  
V
OUT - 0.300  
OUT - 0.205  
VOUT + 0.300  
V
V
OUT + 0.205  
High Voltage (500V)  
Front Panel Display  
GPIB Readback  
498.350  
________V  
________V  
________V  
501.650  
6.5mV  
6.5mV  
6.5mV  
V
OUT - 3.500  
OUT - 2.700  
VOUT + 3.500  
OUT + 2.700  
V
V
23  
24  
Load Effect (200V)  
Source Effect (500V)  
V
OUT - 0.060  
OUT - 0.063  
_______mV  
_______mV  
VOUT + 0.060  
VOUT + 0.063  
350µV  
800µV  
V
PARD (Ripple and Noise)  
RMS  
Peak-to-Peak  
25  
26  
0
0
0
_______mV  
_______mV  
_______mV  
0.050  
0.160  
7.5mV  
4.8mV  
24mV  
27  
Transient Recovery  
0.200/5ms  
(90% to 100% Full Load)  
Constant Current Tests  
28  
Current Programming  
and Readback  
Low Current (0.10A)  
Front Panel Display  
GPIB Readback  
0.015  
________A  
0.185  
56µA  
56µA  
56µA  
2mA  
2mA  
2mA  
2µA  
I
I
OUT - 0.060  
OUT - 0.050  
4.900  
________A  
________A  
________A  
________A  
________A  
________mA  
IOUT + 0.060  
I
OUT + 0.050  
5.100  
High Current (5.0A)  
Front Panel Display  
GPIB Readback  
I
I
I
OUT - 0.085  
OUT - 0.075  
OUT - 0.034  
IOUT + 0.085  
OUT + 0.075  
I
29  
29  
30  
Load Effect (2.0A)  
IOUT + 0.034  
IOUT + 0.018  
0.050  
Source Effect (5.0A)  
PARD (Ripple and Noise)  
I
OUT - 0.018  
0
________mA  
________mA  
2µA  
5mA  
136  
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G
Manual Backdating  
This section describes changes that must be made to the manual so that it applies to instruments with serial numbers lower  
than those listed on the title page. Look in the following table for the serial number of your instrument, and make only those  
changes listed for your instrument. Note that for some changes you may be instructed to update the instrument if certain  
components are being replaced during repair.  
__________________________________________  
| Prefix | Serial Number | Make Changes  
__________________________________________  
| Prefix | Serial Number | Make Changes  
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
6030A  
|
6032A  
| 2934A | 01825-01829 | 1-7, 9, 10, 12, 14-18  
| 3023A | 01925-02408 | 1-7, 9, 10, 12, 14-18  
| 3123A | 02409-02538 | 1-7, 9, 10, 12, 14-18  
| 3137A | 02539-02568 | 1-7, 9, 10, 12, 14-17  
| 3141A | 02569-02748 | 1-7, 9, 10, 12, 14-16  
| 3211A | 02749-02778 | 1-7, 9, 10, 12, 14-16  
| 3215A | 02779-02808 | 1-7, 9, 10, 12, 14, 15  
| 3220A | 02809-03068 | 1-7, 9, 10, 12, 14  
| 3251A | 03069-03108 | 1-7, 9, 10, 12  
| 3305A | 03109-03308 | 1-7, 9, 10  
| 3332A | 03309-03568 | 1-7, 9  
| 3415A | 03569-03648 | 1-7  
| 3430A | 03649-03708 | 1-6  
| 3441A | 03709-03818 | 1-5  
| 3506A | 03819-04088 | 1-4  
| 3544A | 04089-04478 | 1-3  
| 3702A | 04479-04848 | 1, 2  
| US3702 | 0101-0260 | 1, 2  
| US3832 | 0261-0300 | 1  
| 3004A | 05881-05885 | 1, 3-7, 9-12, 14, 17, 18 |  
| 3023A | 06181-07180 | 1, 3-7, 9-12, 14, 17, 18 |  
| 3123A | 07181-07480 | 1, 3-7, 9-12, 14, 17, 18 |  
| 3138A | 07481-07880 | 1, 3-7, 9-12, 14, 17  
| 3211A | 07881-08020 | 1, 3-7, 9-12, 14, 17  
| 3221A | 08021-08200 | 1, 3-7, 9-12, 14  
| 3232A | 08201-08480 | 1, 3-7, 9-12, 14  
| 3250A | 08481-08560 | 1, 3-7, 9-12  
| 3304A | 08561-08780 | 1, 3-7, 9-11  
| 3319A | 08781-08820 | 1, 3-7, 9, 10  
| 3304A | 08821-08860 | 1, 3-7, 9, 10  
| 3319A | 08861-08980 | 1, 3-7, 9, 10  
| 3323A | 08981-09580 | 1, 3-7, 9  
| 3415A | 09581-09900 | 1, 3-7  
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| 3431A | 09901-10140 | 1, 3-6  
| 3440A | 10141-10580 | 1, 3-5  
| 3510A | 10581-11160 | 1, 3-4  
| 3542A | 11161-13020 | 1, 3  
| US3542 | 0101-0880  
| US3832 | 0881-1025  
| 1, 3  
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6031A  
6035A  
| 2934A | 01821-01825 | 1, 3-7, 9-12, 14, 16,17,18|  
| 3026A | 01921-02280 | 1, 3-7, 9-12, 14, 16,17,18|  
| 3121A | 02281-02410 | 1, 3-7, 9-12, 14, 16,17,18|  
| 3137A | 02411-02430 | 1, 3-7, 9-12, 14, 16, 17  
| 3140A | 02431-02520 | 1, 3-7, 9-12, 14, 16  
| 3213A | 02521-02560 | 1, 3-7, 9-12, 14, 16  
| 3221A | 02561-02650 | 1, 3-7, 9-12, 14  
| 3302A | 02651-02690 | 1, 3-7, 9-12  
| 3304A | 02691-02700 | 1, 3-7, 9-11  
| 3313A | 02701-02760 | 1, 3-7, 9-10  
| 3325A | 02761-02920 | 1, 3-7, 9  
| 3416A | 02921-02990 | 1, 3-7  
| 3429A | 02991-03020 | 1, 3-6  
| 3440A | 03021-03110 | 1, 3-5  
| 3506A | 03111-03280 | 1, 3, 4  
| 3543A | 03281-03890 | 1, 3  
| US3543 | 0101-0340 | 1, 3  
| US3831 | 0341-0375 | 1  
| 3038A | 00101-00177 | 1-10, 12-18  
| 3124A | 00178-00217 | 1-10, 12-18  
| 3140A | 00218-00297 | 1-10, 12-16  
| 3211A | 00298-00317 | 1-10, 12-15  
| 3224A | 00318-00347 | 1-10, 12-14  
| 3239A | 00348-00387 | 1-10, 12, 13  
| 3251A | 00388-00417 | 1-10, 12  
| 3308A | 00418-00477 | 1-10  
| 3330A | 00478-00517 | 1-9  
| 3330A | 00518-00537 | 1-9  
| 3351A | 00538-00597 | 1-8  
| 3418A | 00598-00637 | 1-7  
| 3432A | 00638-00682 | 1-5  
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| 3512A | 00683-00862 | 1-4  
| 3542A | 00863-01112 | 1-3  
| 3702A | 01113-01342 | 1,2  
| US3702 | 0101-0250  
| US3832 | 0251-0280  
| 1,2  
| 1  
137  
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CHANGE 1:  
Under A1 Main Board, change R45 to 82.5k p/n 0757-  
0563.  
CHANGE 8:  
Under A1 Main Board, change K1, K2 to p/n 0490-1746.  
Change R47 and R48 150 ohms p/n 0761-0035.  
CHANGE 2:  
CHANGE 9:  
Under A8 GPIB Board.  
Under A2 Control Board,  
Add:  
R100 p/n 0698-4037.  
U17 p/n 1820-2549  
*********** For Model 6035A only ***********  
Change R40 to 95k p/n 0699-1211 and 1.21M p/n 0699-  
1271. Change R41 to 200k p/n 0698-6376.  
Delete: C67-70 0.01uF 10%, p/n 0160-4832, qty 4.  
C71,73 2200pF 10%, p/n 0160-4830, qty 2.  
L1 choke, p/n 9170-1680.  
CHANGE 10:  
L2-4 core-shield bead, p/n 9170-1454, qty 3.  
Q1 transistor 2N4917, p/n 1853-0089.  
R1 47.5K 1%, p/n 0757-0457.  
Under A3 Front Panel, change G1 to p/n 06032-60005.  
On page 5-18 under Chassis Mechanical, change Knob to  
p/n 0370-1303. Delete Spacer, p/n 2190-0736.  
:
R2,12 4.64K 1%, p/n 0698-3155, qty 2.  
R79,80 0 ohm, p/n 8159-0005, qty 2.  
U117 IC-9914 talker/listener, p/n 1821-1740.  
CHANGE 11:  
Under A1 Main Board,  
Change: A8, GPIB board to p/n 5060-3551.  
C14 to 0.047uF, p/n 0160-5422.  
C23 to 39uF, p/n 0180-0393.  
C61 to p/n 0160-4281.  
Add:  
C3, C7, 1400uF p/n 0180-3460  
R6, 1.3k, p/n 0811-1803  
U2, U4, rectifier, p/n 1906-0006  
Delete: C27, 34, cap 0.01uF 400V, p/n 0160-6805  
CR6-13, power rectifier 400V, p/n 1901-0731  
R24, res 200 5% 1/2W, p/n 0686-2015  
R43, 44, res 2.61k 1% 1/8W, p/n 0698-0085  
R45, res 82.5k 1% 1/8W, p/n 0757-0463  
R46, res 681 1% 1/8W, p/n 0757-0419  
R47, 48, res 150 5% 1W p/n 0761-0035  
R49, res 100 1% 1/8W, p/n 0757-0401  
Q2, FET N-channel, p/n 1855-0665  
VR1, diode zener 7.5V 5%, p/n 1902-0955  
U6, opto-isolator, p/n 1990-1074  
Change: A1 (6030A) to p/n 06030-60021  
A1 (6031A) to p/n 06011-60021  
A1 (6032A) to p/n 06032-60021  
A1 (6035A) to p/n 06030-60027  
C1,2,4-6,8 to 1400uF p/n 0180-3460  
C10 to 22uF p/n 0180-3696  
U6 to p/n 5080-2160.  
U36 to p/n 5080-2158.  
CHANGE 3:  
Under A5 Diode Board, change CR4 and CR5 for model  
6030A to p/n 1901-1182. Change CR4 and CR5 for  
model 6035A to p/n 1901-1316. Change Q1 for model  
6030A to p/n 1855-0486 and for model 6035A to p/n  
1855-0802. Under A5 Mechanical, change heatsink  
(CR5) for models 6030A,35A to p/n 06030-00003.  
Change heatsink (CR4, Q1) for models 6030A,35A to  
p/n 06030-00004.  
CHANGE 4:  
Under A4 FET Board, change CR1 and CR4 to p/n  
1901-1137. Both diodes must be the same part number.  
CR1 to 1901-0028  
CHANGE 5:  
DS1 to display, p/n 1990-0325  
Under A8 GPIB Board, change U33 to p/n 1820-0430.  
K1 to relay p/n 0490-1457  
K2 to relay p/n 0490-1341.  
CHANGE 6:  
R5 to 300, p/n 0686-3015  
Under A8 GPIB Board, change U14 to p/n 1820-6721.  
R7 to 10, p/n 0686-1005  
R8 to 33k, p/n 0686-3335  
CHANGE 7:  
R41 to 30, p/n 0811-1869  
Under A8 GPIB Board:  
Add:  
U15, p/n 1LH4-0001.  
Under A6 AC Input Filter, change the part number of the  
board to 06011-60025 for models 6030A,31A,32A, and  
06011-60028 for model 6035A.  
Delete: U115, SN75ALS61610, p/n 1820-6045.  
U116, SN75ALS6160, p/n 1820-6170.  
C142 100pF, p/n 0160-4801.  
C143-144 .047uF, p/n 0160-5422.  
Change: A8, GPIB board to p/n 5060-3305.  
Under Chassis Electrical at the end of the parts list,  
change L4 to p/n 06011-80093.  
138  
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CHANGE 12:  
Under A1 Main Board,  
*********** For Model 6031A only ***********  
Change C23 and C28 to .047uF Agilent p/n 0160-  
5895.  
Add C21 and C24, .047uF Agilent p/n 0160-5895.  
Add R21 and R22, 1 ohm p/n 0699-0208.  
*********** For Model 6032A only ***********  
Change C20 and C22 to .047uF Agilent p/n 0160-  
5895.  
Add C21 and C23, .047uF Agilent p/n 0160-5895.  
Add R20 and R23, 1 ohm p/n 0699-0208.  
CHANGE 13:  
Under A8 GPIB Board, change U8 to p/n 1818-4111.  
CHANGE 14:  
Under A1 Main Board, change C11,12 to 0.047uF, p/n  
0160-5895. On page 5-3, change R12 and R13 to 2.2  
ohms, p/n 0699-0188.  
CHANGE 15:  
Under A8 GPIB Board, delete D22.  
CHANGE 16:  
Under A5 Diode Board, delete L3.  
CHANGE 17:  
Under A1 Main Board, change U1 to p/n 1906-0218.  
CHANGE 18:  
Under A6 AC Input Filter, change L1 to p/n 06011-  
80094.  
139  
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