Xerox Printer Phaser 3120 User Manual
LASER PRINTER  
Phaser 3120  
Phaser 3130  
Manual  
SERVICE  
LASER PRINTER  
CONTENTS  
1. Precautions  
2. Specifications  
3. Disassembly and Reassembly  
4. Troubleshooting  
5. Exploded Views and Parts List  
6. Block Diagram  
7. Connection Diagram  
8. Schematic Diagram  
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Precautions  
1.2 Caution for safety  
1.2.1 Precaution related noxious material  
The toner in a printer cartridge contains a chemical material, which might harm human body if it is swallowed.  
Please keep children out of the toner cartridge.  
1.2.2 Precaution related electric shock or fire  
It is possible to get electric shock or burn by fire if you don't fallow the instructions of the manual.  
(1) Use exact voltage. Please do use an exact voltage and wall socket. If not, a fire or an electric leakage can  
be caused.  
(2) Use authorized power code. Do use the power code supplied with PRINTER. A fire can be occurred when  
over current flows in the power code.  
(3) Do not insert many codes in an outlet. If do, a fire can be occurred due to flow over current in an outlet.  
(4) Do not put water or extraneous matter in the PRINTER. Please do not put water, other liquid, pin, clip, etc.  
It can cause a fire, electric shock, or malfunction. If it is happened, turn off the power and remove the  
power plug from outlet immediately.  
(5) Do not touch the power plug with wet hand. When servicing, do remove the power plug from outlet. And  
do not insert or take off it with wet hand. Electric shock can be occurred.  
(6) Caution when inserting or taking off the power plug. The power plug has to be inserted completely. If not,  
a fire can be caused due to poor contact. When taking off the power plug, do grip the plug and take it off.  
If grip the line and pull over, it could be damaged. A fire or electric shock could cause.  
(7) Management of power code. Do not bend, twist, or bind it and place other materials on it. Also, do not fix  
it with staples. If the power code gets damage, a fire or electric shock can be caused. A damaged power  
code must be replaced immediately. Do not repair the damaged part and reuse it. A repaired part with plas-  
tic tape can be occurred a fire or electric shock. Do not spread chemicals on the power code. Do not  
spread insecticide on the power code. A fire or electric shock can be occurred due to thinner(weak) cover  
of the power code.  
(8) Check whether the power outlet and the power plug are damaged, pressed, chopped, or blazing fire or  
not. When such inferiorities are found, repair it immediately. Do not make it pressed or chopped when  
moving the machine.  
(9) Caution when thundering, and being flash of lightening. It causes a fire or electric shock. Take the power  
plug off when thundering. Do not touch cable and device when thundering and being flash of lightening.  
(10) Do avoid the place where is moisture or has dust. Do not install the printer in where have lots of dust or  
around humidifier. A fire can be occurred. A plug part need to clean well with dried fabric to remove dust.  
If water drops are dripped on the place covered with dust, a fire can be occurred.  
(11) Avoid direct sunlight. Do not install the printer near to window where directly contacts to the sunlight. If  
the machine contacts sunlight long time, the machine cannot work properly because inner temperature  
of the machine is getting higher. A fire can be caused.  
(12) Turn off the power and take off the plug when a smoke, strange smell, or sound from the machine. If you  
keep using it, a fire can be occurred.  
(13) Do not insert steel or metal piece inside/outside of the machine. Do not put steel or metal piece into a  
ventilator. An electric shock could be happened.  
Service Manual  
1-2  
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Precautions  
1.2.3 Precaution related handling the machine.  
If you ignore this information, you could get harm and machine could be damaged.  
(1) Do not install it on the different levels, or slanted floor.  
Please confirm whether it is balanced or not after installation. If it is unbalanced, an accident can be hap-  
pened due to the machine fell over.  
(2) Be careful not to insert a finger or hair in the rotating unit.  
Be careful not to insert a finger of hair in the rotating unit (motor, fan, paper feeding part, etc) while the  
machine is operating. Once it happens, you could harm.  
(3) Do not place a pot contains water/chemical or small metals. If those are got into the inner side of machine,  
a fire or electric shock can be occurred.  
(4) Do not install it in where lots of moisture or dust exists or where raindrop reaches. A fire or electric shock  
can be caused.  
(5) Do not place a candlelight, burning cigarette, and etc. on the machine. Do not install it near to heater. A  
fire can be occurred.  
1.2.4 Precaution when assembly/disassembly  
When replace parts, do it very carefully. Do memorize the location of each cable before replace parts for  
reconnecting it afterwards. Do memorize. Please perform the below before replace or disassembly the parts.  
(1) Check the contents stored in the memory. All the information will be erased after replace main board. The  
information needed to keep has to be written down.  
(2) Before servicing or replacing electric parts, take off a plug.  
(3) Take off printer cables and power code connected to printer.  
(4) Do use formal parts and same standardized goods when replacing parts.Must check the product name,  
part code, rated voltage, rated current, operating temperature, etc.  
(5) Do not give an over-force when release or tighten up the plastic parts.  
(6) Be careful not to drop the small parts such as screws in the printer.  
(7) Be careful not to change the location of small parts such as screws when assembling and disassembling.  
(8) Do remove dust or foreign matters completely to prevent fire of tracking, short, or etc.  
(9) After finished repair, check the assembling state whether it is same as before the repair or not.  
Service Manual  
1-3  
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Precautions  
1.3 ESD Precautions  
Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly  
called “Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits,  
some field effect transistors, and semiconductor “chip” components.  
The techniques outlined below should be followed to help reduce the incidence of component damage caused  
by static electricity.  
Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.  
1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off  
any electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commer-  
cially available wrist strap device, which should be removed for your personal safety reasons prior to apply-  
ing power to the unit under test.  
2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface,  
such as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity  
of the assembly.  
3. Use only a grounded tip soldering iron to solder or desolder ESDs.  
4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static”  
can generate electrical charges sufficient to damage ESDs.  
5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to  
damage ESDs.  
6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most  
replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a  
comparable conductive material.  
7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch  
the protective material to the chassis or circuit assembly into which the device will be installed.  
8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed,  
until completely plugged or soldered into the circuit.  
9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the  
brushing together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electric-  
ity sufficient to damage an ESD.  
Service Manual  
1-4  
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Precautions  
1.4 Tool for Troubleshooting  
The following tools are recommended for safe and smooth troubleshooting described in this service manual.  
DCU(Diagnostic Control Unit)  
Standard : Test equipment to diagnose the Laser  
printer supplied by Samsung Electronics.  
Driver  
1
4
Standard : "-" type, "+" type (M3 long, M3 short, M2 long,  
M2 short).  
Pinset  
5
6
Standard : For general home use, small type.  
DVM(Digital Volt Meter)  
Standard : Indicates more than 3 digits.  
Cotton Swab  
Standard : For general home use, for medical ser-vice  
2
Cleaning Equipments a IPA(Isopropyl  
Alcohol)dry cloth or a soft stuff neutral  
detergent  
7
8
Software(Driver) installation CD ROM  
Electronic Scale  
3
Standard : Equipment to check the weight of con-  
sumables(toner cartridge) supplied by Samsung  
Electronics. (The gram unit can be measured.)  
Mind your hands not to be touched when you  
disassemble and reassemble PBA ASS'Y, such  
as the main board, SMPS, HVPS.  
Service Manual  
1-5  
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Specifications  
2. Specifications  
2.1 General Specifications  
2
ITEM  
DESCRIPTION  
Non-impact Electro-photograpic Printing  
Print Technology  
Developing system  
Print Speed(1)  
Non-Magnetic, Mono-Component Developing System  
16 PPM : A4 size , 5% Character pattern  
17 PPM : Letter size , 5% Character pattern  
Phaser 3120 : True 600 X 600 DPI  
Phaser 3130 : 1200 X 600 DPI  
Laser diode (LSU : Laser Scanner Unit)  
Power-on boot : 30 seconds or less  
Less than 11 seconds (Ready to 1st page out)  
75 X 125 (3” X 5”) mm to 216 X 356 (8.5” X 14”)mm  
16 ~ 24 lb  
Resolution  
Source of Light  
Warm-Up Time  
First Print Out Time  
Media Size  
Media Thickness  
Dimension(W X D X H)  
Weight  
348 X 355 X 193mm / 13.7 X 14 X 7.6 inch  
Net : 7 Kg /15.4 lb  
Gross : 9.5 Kg (Max.)  
Acoustic Noise(1)  
Stand by : Less than 35 dB  
Printing: Less than 50 dB  
Machine Life  
120,000 Sheets  
Periodic Replacing Parts(2) Pick Up Roller : 60,000 Sheets  
Feed Roller 60,000 Sheets  
:
Transfer Roller: 60,000 Sheets  
Fuser Assembly : 60,000 Sheets  
(1)  
(2)  
For measuring the printing speed, count the papers which outputted within one minute from when the  
second page starts to be printed. (A4, 5% character pattern standard)  
The life span of the consumption parts can be checked by printing the demo page or the system list.  
(Refer to the 6.3 Receive the service information)  
Service Manual  
2-1  
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Specifications  
2.2 Controller Specification  
DESCRIPTION  
ITEM  
Phaser 3120  
Samsung Jupiter4 90MHz  
Phaser 3130  
Samsung SPGPm 166MHz  
Processor(CPU)  
OS Compatibility(1)  
Win 98x/NT4.0/ME/2000/XP,  
Various Linux OS,Mac(Mac OS 8.6 ↑)  
FLASH ROM(PROGRAM) : 0.5MB flash  
RAM : 8 MB  
Memory  
RAM : 32 MB  
EEPROM(NVRAM) : 512byte  
SPL(Samsung Printer Language)  
USB 1.1  
Emulation  
Interface  
PCL6, IBMProPrinter, EPSON  
USB  
- USB 2.0  
- 12 Mbps 1 port  
Parallel : IEEE 1284  
- Modes supported :  
Compatible,Nibble,Byte,ECP  
External Network Adaptor(Optional)  
Interface switching  
Interface time-out  
Font  
Automatic  
5min(Max.)  
Windows Font  
45 Scalable, 1 Bitmap  
(1) The SPL series model is USB exclusive use, so it supports the environment beyond the WIN 98.  
2.3 Electrical Specification  
ITEM  
DESCRIPTION  
200-240 VAC / 100~127VAC  
Input Voltage  
Nominal input voltage  
Input voltage range  
Nominal frequency  
189-264 VAC/ 90~132VAC  
50/60 Hz  
Frequency tolerance  
+3Hz  
Power Consumption  
Printing : 280W Avg or less  
Power Save : 10W Avg or less  
2.4 Environmental Range  
ITEM  
OPERATING  
STORAGE  
Temperature  
10~32 oC(50-90 oF)  
-20~40 oC (-4~104 oF)  
Humidity  
20~80%RH  
10~80%RH  
Service Manual  
2-2  
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Specifications  
2.5 TONER Cartridge (Developer)  
ITEM  
Life span  
DESCRIPTION  
REMARK  
IDC 5% pattern  
3,000 sheets  
Developing  
Charging  
Non-magnetic Mono Conponent Contact Developing  
Conductive Roller Charging  
Not Available  
Toner checking sensor  
Ozone  
0.1PPM or less  
8 hours  
Style  
Single cartridge  
2-Paper Handling Specifications  
Please refer to "Paper Specifications" on user guide  
• Input Paper Size  
PAPER  
DIMENSIONS  
210 X 297 mm  
WEIGHT  
60 to 90 g/m2 bond(16 to 24 lb)  
A4  
Letter  
216 X 279(8.5 X 11")  
216 X 356(8.5 X14")  
Legal(Legal14")  
JIS B5  
182 X257mm (7.2 X 10")  
216 X 330mm (8.5 X 13")  
Folio(Legal13")  
Minimum size (Custom)  
Maximum size (Custom)  
Transparency(OHP)  
Label paper  
76 X 127mm (3 X 5")  
60 to 163 g/m2 bond(16 to 43 lb)  
216 X 356mm (8.5 X 14")  
Same minimum and maximum  
sizes as listed above  
Thickness:  
0.10 X 0.14 mm (0.0039 X 0.0055")  
Envelopes  
Up to 90 g/m2 bond(16 to 24 lb)  
• Input capacity  
Cassette: 250 sheets  
Manual : 1 sheet  
• Output capacity  
Face Down : 50 sheets(20lb)  
Face Up : 1 sheet(OHP, Lavbel, Cut Sheet, Envelope)  
Service Manual  
2-3  
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Specifications  
Service Manual  
2-4  
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Disassembly and Reassembly  
3. Disassembly and Reassembly  
3.1 General Precautions on Disassembly  
3
When you disassemble and reassemble compo-  
nents, you must use extreme caution. The close  
proximity of cables to moving parts makes proper  
routing a must.  
If components are removed, any cables disturbed  
by the procedure must be restored as close as  
possible to their original positions. Before remov-  
ing any component from the machine, note the  
cable routing that will be affected.  
Releasing Plastic Latches  
Many of the parts are held in place with plastic  
latches. The latches break easily; release them  
carefully.  
To remove such parts, press the hook end of the  
latch away from the part to which it is latched.  
Whenever servicing the machine, you  
must perform as follows:  
1. Check to verify that documents are not stored  
in memory.  
2. Be sure to remove the toner cartridge before  
you disassemble parts.  
3. Unplug the power cord.  
4. Use a flat and clean surface.  
5. Replace only with authorized components.  
6. Do not force plastic-material components.  
7. Make sure all components are in their proper  
position.  
Service Manual  
3-1  
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Disassembly and Reassembly  
3.2 Top Cover  
1. Pull the Cassette out of the printer.  
4. Unlatch the front ends of the Top Cover.  
Cassette  
2. Remove the Front Cover in the direction of  
arrow.  
5. Remove the Top Cover in the direction of arrow.  
Top Cover  
Front Cover  
3. Remove four screws.  
6. Remove the Rear Cover from the Top Cover.  
Rear Cover  
Service Manual  
3-2  
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Disassembly and Reassembly  
3.3 Fuser  
1. Before you remove the Fuser, you should  
remove:  
5. Remove one screw and take the Idle Gear out.  
- Top Cover(see page 3-2)  
Idle Gear  
2. Unplug two connectors(Block) from the boards,  
then remove four screws.  
Fuser Ass'y  
6. Remove four screws and divide the Fuser into  
two parts  
Fuser Cover  
3. Remove two screws and take the Thermostat  
out of the Fuser.  
Thermostat  
7. Remove the Thermister from the Fuser Cover.  
4. Remove two screws and take the Halogen  
Lamp out of the Heat Roller.  
Heat Roller  
Thermister  
Halogen Lamp  
Service Manual  
3-3  
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Disassembly and Reassembly  
3.4 Exit Roller  
1. Before you remove the Fuser, you should  
remove:  
Exit Gear  
Bearing  
- Top Cover(see page 3-2)  
Exit Roller  
2.Remove the Exit Gear, Bearing and Exit Roller.  
1
2
3.5 LSU  
1. Before you remove the Fuser, you should  
remove:  
4. Unplug two connector from the LSU  
- Top Cover(see page 3-2)  
2. Remove two screws and unplug one connector  
from the Frame.  
5. Unplug four screws and take the LSU out.  
LSU  
3. Remove the LED PBA Ass’y as shown below.  
LED PBA Cover  
Service Manual  
3-4  
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Disassembly and Reassembly  
3.6 Fan  
1. Before you remove the Fuser, you should  
remove:  
- Top Cover(see page 3-2)  
2. Unplug the connector from the SMPS and  
remove the one screw. Then take out the Fan.  
DC Fan  
3.7 Driver Ass’y  
1. Before you remove the Fuser, you should  
remove:  
3. Unplug one connector from the Driver Ass’y  
- Top Cover(see page 3-2)  
Drive Ass'y  
2. Remove the six screws from the Drive Ass’y.  
Service Manual  
3-5  
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Disassembly and Reassembly  
3.8 Engine Shield Ass’y  
1. Before you remove the Fuser, you should  
remove:  
- Top Cover(see page 3-2)  
- Fuser Connector(see page 3-3)  
2. Remove the fourteen screws securing from the  
Engine Shield Ass’y and unplug the all connec-  
tors. Then take the Engine Shield Ass’y.  
Engine Shield  
Ass'y  
3.9 Main PBA  
1. Before you remove the Fuser, you should  
remove:  
- Top Cover(see page 3-2)  
- Engine Shield Ass’y(see page 3-6)  
Main PBA  
2. Unplug one connector and remove five screws  
from the Main PBA. Then lift the Main PBA out,  
as shown below.  
Service Manual  
3-6  
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Disassembly and Reassembly  
3.10 SMPS  
1. Before you remove the Fuser, you should  
remove:  
3. Remove one screw and unplug one connector  
from the Main PBA.  
- Top Cover(see page 3-2)  
- Engine Shield Ass’y(see page 3-6)  
2. Unplug one connector and remove three screws  
then take the Inlet Ass’y out.  
Inlet Bracket  
4. Remove three screws and take The SMPS out.  
SMPS  
Service Manual  
3-7  
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Disassembly and Reassembly  
3.11 Transfer Roller  
1. Before you remove the Fuser, you should  
remove:  
3. Unplug the PTL Holder Connector, then remove  
the PTL Holder and PTL Lens, as shown below.  
- Top Cover(see page 3-2)  
- LSU(see page 3-4)  
PTL  
Lens  
PTL  
Holder  
2. Remove three screws and take the Transfer  
Earth out.  
Transfer  
Earth  
4. Unlatch the Bush and remove it. Then lift the  
Transfer Roller out, as shown below.  
Transfer  
Roller  
Bush  
Service Manual  
3-8  
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Disassembly and Reassembly  
3.12 Feed Roller  
1. Before you remove the Fuser, you should  
remove:  
5. Remove the Idle Gear and Feed Gear2.  
- Top Cover(see page 5-2)  
- Drive Ass’y(see page 5-7)  
Feed Gear2  
2. Remove two screws from the Guide Paper and  
take it out.  
Guide paper  
Idle Gear  
6. Remove the Feed Gear 1 Ass’y, as shown  
below.  
3. Pull up the Feed Idle Bush and Feed Idle Shaft,  
as shown below.  
Feed Gear1  
Ass'y  
Feed Idle  
Shaft  
Bush  
7. Remove the Feed Roller and Feed Roller 1, as  
shown below.  
4. Remove three screws from the Feed Bracket  
and take it out.  
Feed Roller  
Feed Bracket  
Feed Roller1  
Service Manual  
5-11  
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Disassembly and Reassembly  
3.13 Pick Up Roller  
1. Before you remove the Fuser, you should  
remove:  
3. Remove the Pick up Ass’y, as shown below.  
- Top Cover(see page 3-2)  
- Drive Ass’y(see page 3-5)  
- Engine Shield Ass’y(see page 3-6)  
2. Remove the Pick up Gear Ass’y, as shown  
below.  
Pick up Gear  
Ass'y  
Bush  
1
2
Pick up Ass'y  
3.14 Solenoid  
1. Before you remove the Fuser, you should  
remove:  
- Top Cover(see page 3-2)  
- Drive Ass’y(see page 3-5)  
- Engine Shield Ass’y(see page 3-6)  
- Pick Up Roller(see page 3-10)  
(Pick up)  
Solenoid  
2. Remove two screw then remove The Manual  
Solenoid and Pick Up Solenoid.  
(Manual)  
Solenoid  
Service Manual  
3-10  
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TROUBLESHOOTING  
4. Troubleshooting  
4.1 How to use DCU  
4
4.1.1 DCU Setup  
You can examine the malfunction of the printer. To perform DCU, open the front discharge cover and leave  
the connect the harness wire(10 pin/4 pin) to the CN10(4 pin) of the Main control board.  
ML SERIES DIAGNOSTIC CONTROL UNIT  
04 DEV 300  
05 LSU READY  
07 PAPER EMPTY  
08  
DEV 350  
DEV 350  
LSU MT & LD  
PAPER WIDTH  
EXIT SENSOR  
LSU MOTOR  
NEW CRU  
SELF  
TEST  
FEED SENSOR  
09 COVER OPEN  
STATUS  
10 COER HEATING PRINTING TEMP READY HEAT  
DIAGNOSTIC  
ON  
OFF  
DIAGNOSTIC CODE  
STATUS CODE  
00 MAIN MOTOR OPERATING SYSTEM  
61 WARM UP  
MAIN HIGH-VOLTAGE ON  
TRNSFER HIGH-VOLTAGE (-)ON  
THV(+) REFERANCE VOLTAGE  
DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON  
LSU OPERATING SYSTEM  
PICKUP CLUTCH ON  
PEEMPTY/PWITH/NEW CRU TEST  
FEED & EXIT SENSOR TEST  
COVER OPEN SENSOR TEST  
FUSER TEST  
01  
02  
03  
04  
05  
06  
07  
08  
09  
10  
11  
00 READY (REGAL)  
01 READY (LETTER)  
READY (A4)  
READY (EXECUTIVE)  
READY (B5)  
02  
03  
04  
PRINT START  
20  
30  
40  
50  
FEED SENSOR ON  
FEED SENSOR OFF  
PAPER OUT  
HOT BURN TEST  
CLEAN MODE PRINT  
12  
13  
14  
THV(+)TRIGGER, ALL HV & FAN ON  
THV(+) REFERENCE ON  
SLEEP MODE  
69  
ERROR STATUS CODE  
OPEN FUSER ERROR  
LOW TEMPERATURE ERROR  
OVER HEATING ERROR  
COVER OPEN ERROR  
NO PAPERR  
PAPER JAM 0  
PAPER JAM 1  
PAPER JAM 2  
60  
62  
68  
64  
70  
71  
72  
73  
95 LSU NOT READY  
DIAGNOSTIC  
MODE  
DOWN  
UP  
SHIFT  
STOP  
ENTER  
TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL  
AND TURN THE PRINTER POWER ON.  
Service Manual  
4-1  
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TROUBLESHOOTING  
4.1.2 Code  
Connect DCU to the printer and turn the power on. It show 7 Segment FND on the panel and each code  
tells the function of the printer.  
1) Normal Code  
While printing or warming up, it indicate the position of the paper  
Code  
61  
State  
Warm up  
Description  
The printer is on, the cover is open or close.  
00~05  
Ready(kind of paper)  
The printer is ready, the paper is detected when the first paper is printed.  
00: Legal ,01: Letter ,02: A4 ,03: EXEC ,04: B5 ,05: Folio, 06: A5/A6  
The engine controller received the print order from the video controller.  
20: 1st, 21: MP, 22: SCF  
20, 21, 22  
Print Start  
30  
40  
50  
69  
Feed Sensor On  
Feed Sensor off  
Paper Out  
The paper is passing out of the Feed Sensor.  
The paper has passed out of the Feed Sensor.  
The paper has passed out of Exit Sensor.  
Sleep Mode  
The fuser power turned off to minimize the power consumption.  
2) Error Code  
When detecting the malfunction, the printing is stopped to indicate error code.  
Code  
State  
Description  
60, 62, 68 Fuser Error  
The error in the fuser occurred. There is a short circuit in the thermistor  
and the thermostat while printing, Low Temperature Error occurs.  
• 60: Open Fuser Error  
• 62: Low Heat Error  
• 68: Over Heat Error  
64  
65  
70  
71  
72  
Cover Open  
CRU Error  
No Paper  
The Printer Cover is open.  
The Toner Cartridge not installed,  
No paper in the paper cassette.  
Paper Jam 0  
Paper Jam 1  
The front part of paper is jammed between pickup unit and Feed sensor.  
The front part of paper is jammed between the Discharge sensor and  
Feed sensor.  
73  
Paper Jam 2  
The front part of paper is jammed just after passing through the discharge  
sensor.  
76  
95  
Out Bin Full  
The Out bin is filled with paper.  
LSU Not Ready  
LSU Scanner Motor not ready or Hsync signal not output.  
Service Manual  
4-2  
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TROUBLESHOOTING  
4.1.3 Self Diagnostic Mode  
If Error code occurs due to malfunction of the printer, perform Self Diagnostic Mode to solve the problem.  
The printer works only in the self-test mode to solve the malfunction problem.  
To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same  
time.  
Release the button within 2 or 3 seconds if 78 shows in the DCU. If 00 shows in the DCU, press the button  
[Up] or [Shift] to select the self+test , and press the button of [Enter] to operate. To stop, press the button of  
[shift] and [Enter] together.  
Code  
00  
Description  
Main Motor Operating System  
Only the main motor is in operation.  
01  
02  
Main High Voltage On(THV-)  
-1400 voltage output by MHV terminal.  
Caution : High voltage probe should be used.  
Transfer High Voltage(-)On(THV-)  
-1000 voltage output by MHV terminal.  
Caution : High voltage probe should be used.  
03  
04  
Transfer High Voltage (+)Reference on (THV +)  
+800 voltage output by MHV terminal.  
Caution : High voltage probe should be used.  
DEV/supply High Voltage : DEV/Supply High Voltage Test.  
The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply  
high voltage output by each HV terminal(-500V). Press the [Up] button to switch the volt-  
age. The middle and right one of the three LEDs are on and -650 voltage output by DEV  
HV terminal.  
Caution : High voltage probe should be used.  
05  
06  
LSU Operating System  
The scanning motor of LSU is in operation, the right LED of the three buttons on. Press  
the [Up] button to Check LD. LD is functioning and the middle button is on. If the LD is  
normal, all LEDs are on.  
Pickup clutch on  
The Solenoid in the printer is in operation. To stop the operation, Press the button [shift]  
and [Enter] together.  
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TROUBLESHOOTING  
Code  
Description  
07  
Paper Empty Sensor Test :  
If activate the Actuator of the PEMPTY Sensor, the left and right of the three LEDs are  
on.  
Paper Empty Sensor ON/OFF  
1st LED ON/OFF  
08  
Feed & Exit Sensor Test  
Test the Feed sensor and Discharge sensor in the same way as '07'.  
Feed Sensor ON/OFF  
Exit Sensor ON/OFF  
2nd LED ON/OFF  
3rd LED ON/OFF  
09  
10  
Cover Open Sensor Test  
Test the Cover Open Sensor in th same way as code '07’  
Cover Open Sensor ON/OFF  
1st LED ON/OFF  
Fuser Test  
If the [Enter] button pressed, the right LED is on and temperature of the fuser is up to  
READY Mode. If the [Up] button pressed, the middle LED is on and temperature of the  
fuser is up to Printing Mode.  
If you press the button once more, the left LED is on and temperature of the fuser is up  
to overheat Mode.  
11  
Hot Burn Test  
If the [enter] button pressed, the printer is continuously printing without detection.  
Turn the power off to stop operation.  
12  
13  
Cleaning Mode Print Mode  
Print the paper to clean the OPC Drum in the Cartridge.  
THV(+) TRIGGER. ALL HV :  
All high voltage output by each HV terminal and LSU and the fan is in operation. In this  
mode, electronic resistance of transfer roller and high voltage is detected.  
14  
15  
16  
17  
PTL Test :  
Indicates the function of the PTL, same method of the code ‘07’.  
Fan Test :  
Indicates the function of the Fan, same method of the code ‘07’.  
Manual Pickup Test :  
Indicates the function of th Manual Pickup, same method of the code ‘07’.  
Manual Sensor Test :  
Indicates the function of the Manual Sensor, same method of the code ‘07’.  
Service Manual  
4-4  
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TROUBLESHOOTING  
No.  
Function  
Enter  
Up/ Dow n  
Stop  
Remark  
00  
01  
02  
Motor Run  
Mhv On  
Motor Stop  
Mhv Off  
Motor  
MHV  
-1550V  
Thv Negative On  
Thv Negative Off  
THV(-)  
03  
04  
Thv On  
Dev On  
Thv Off  
Dev Of f  
+1300V  
THV(+)  
DEV  
Supply  
0 : -630V  
DEV  
0 : -430V  
05  
06  
07  
LSU Run  
LSU Stop  
Pickup Off  
LSU  
On  
Off  
Ready  
Pickup On  
Pic kUp  
PEmpty  
Paper Empty  
Cover Open  
08  
09  
Sensor  
Cover  
Ex it  
Feed  
10  
11  
12  
Fuser On  
HotB urn O n  
Clean Printing  
Fuser Off  
Fuser  
HotBurn  
Clean Print  
Thv  
Reference  
PTL  
13  
low  
adequate  
high  
14  
15  
PTL On  
Fan On  
PTL Off  
Fan Off  
FAN  
Manual  
Pic kUp  
Manual  
Sensor  
16  
17  
Manual Pickup On  
Manual Pickup Off  
Manual Sensor  
4.1.4 Self Test Button  
If the Self-Test button pressed, vertical lines are printed.  
Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After  
warming-up the printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection,  
the printer begins printing(trial printing and data from the PC). It is convenient to use this mode when the  
engine malfunction is detected in the control board.  
Service Manual  
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TROUBLESHOOTING  
4.2 Bad image  
4.2.1 Vertical Black Line and Band  
1. Straight thin black vertical line occurs in the printing.  
2. Dark black vertical band occur in the printing.  
• Description  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. Damaged develop roller in the Developer.  
Deformed Doctor-blade or cleaning-  
blade.  
1. If causes 1 and 2 occur in the developer  
cartridge, replace the developer and try to  
print out.  
2. Scratched surface of the discharge roller  
in the developer.  
2. Replace the transfer roller if occurred as  
No. 3.  
3. Partly depression or deformation on the  
surface of the transfer roller.  
4.2.2 Vertical White Line  
• Description  
White vertical voids in the image.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. Foreign matter stuck onto the window of  
internal lenses of LSU mirror.  
1. Foreign matter stuck onto the window :  
Clean the LSU window with recommend-  
ed cleaner(IPA) Clean the window with a  
clean cotton swab.  
2. Foreign matter or toner particles between  
the developer roller and blade.  
2. Foreign matter in the LSU : Open the  
cover of LSU and clean with a cotton  
swab on the surface of the reflex mirror.  
(In case the life of the developer has  
been expired, white lines or light image  
occur in front of the image.)  
3. It may occur when Burr and foreign sub-  
stances are on the window of the devel-  
oper frame.  
3. No 3. : Remove the foreign matter and  
burr of the exposure window.  
(Developer cartridge)  
4. If the fuser is defective, voids occur peri-  
odically at the top of a black image.  
4. No. 4. : Open the front cover and check  
ribs that corresponds to the position of  
the voids. Remove if found.  
5. If the problems are not solved, replace  
the developer cartridge.  
Service Manual  
4-6  
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TROUBLESHOOTING  
4.2.3 Horizontal Black Band  
1. Dark or blurry horizontal stripes occur in the printing periodically.  
(They may not occur periodically.)  
• Description  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. Bad contacts of the voltage terminals to  
developer.  
1. Clean each voltage terminal of the Charge,  
Supply, Develop and Transfer roller.  
(remove the toner particles and paper par-  
ticles)  
2. The rollers of developer may be stained.  
Charge roller = 37.7mm  
2. Clean the right Gear that has relatively  
small gap of the teeth in the OPC.  
Supply roller  
=
37mm  
Develop roller = 35.3mm  
Transfer roller = 45.3mm  
3. If the malfunction persists, replace the  
developer.  
4.2.4 Black/White Spot  
1. Dark or blurry black spots occur periodically in the printing.  
2. White spots occur periodically in the printing.  
• Description  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. If dark or blurry black spots occur periodi-  
cally, the rollers in the Developer may be  
contaminated with foreign matte or paper  
particles.  
1. Run OPC cleaning Mode Print and run the  
Self-test 2 or 3 times.  
( Charge roller : 37.7 mm interval  
OPC drum : 75.5 mm interval)  
2. If faded areas or voids occur in a black  
image at intervals of 75.5 mm, or black  
spots occur elsewhere, the OPC drum  
surface is damaged.  
2. In case of 75.5 mm interval unremovable in  
1, cleanly remove foreign substances stuck  
on the OPC location equivalent to black  
spots and white spots with a dry duster.  
3. If a black image is partially broken, the  
transfer voltage is abnormal or the trans-  
fer roller's life has expired.  
3. The transfer roller guarantees 60.000  
sheets printing. If the roller's life is expired,  
replace it.  
4. In case of 37.7 mm interval unremovable in  
1, take measures as to replace the develop-  
er cartridge and try to print out.  
5. Clean the inside of the set against the paper  
particles and foreign matter in order not to  
cause the trouble.  
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4-7  
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TROUBLESHOOTING  
4.2.5 Light Image  
• Description  
The printed image is light, with no ghost.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. Develop roller is stained when the toner  
of developer cartridge is almost con-  
sumed.  
1. Check if the Toner Save mode is off.  
2. Ambient temperature is below than 10°C.  
2. Replace the developer cartridge and try to  
print out.  
3. Bad contact caused by the toner stains  
between the high voltage terminal in the  
HVPS and the one in the set.  
3. Wait 30 minutes after printer is powered on  
before you start printing.  
4. Abnormal output from the HVPS.  
4. Clean up the contaminated area by the  
toner.  
5. Replace the HVPS if the problems are not  
solved by the above four directions.  
4.2.6 Dark Image or a Black  
• Description  
The printed image is dark.  
Check and Cause  
Solution  
1. No charge voltage in the engine board.  
( Perform DCU diagnostic code 01)  
1. Clean the high voltage charge terminal.  
2. Charge voltage is not turned on due to  
the bad contacts between power supply  
in the side of the Developer and charge  
terminal of HVPS.  
2. Check the state of the connector which  
connects the engine board and HVPS.  
3. Replace the HVPS if not solved by the  
above direction 1 and 2.  
Service Manual  
4-8  
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TROUBLESHOOTING  
4.2.7 Uneven Density  
• Description  
Print density is uneven between left and right.  
Check and Cause  
Solution  
1. The pressure force on the left and right  
springs of the transfer roller is not even,  
the springs are damaged, the transfer  
roller is improperly installed, or the trans-  
fer roller bushing or holder is damaged.  
1. Replace both the left and right Spring  
Holder.  
2. The toner level is not even on the devel-  
oper roller due to the bad blade.  
2. Occur in the developer cartridge, replace  
the developer and try to print out.  
4.2.8 Background  
• Description  
Light dark background appears in whole area of the printing.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. Does character exist less than 2%  
per a page, and hasn’t it been used  
long time?  
1. The toner cartridge is basically  
designed to print 3,000 sheets with  
5% image. If it prints more than  
3,000 sheets (around 5,000 sheets)  
with 2% image, a background can be  
occurred.  
2. Does recycle paper be used?  
2. The B/S is not guaranteed if using  
recycle paper.  
3. Has the life span of the developer  
ended?  
3. Replace the developer when the life  
span of it has been ended.  
4. Is the movement(Up and Down) of  
the transfer roller smooth?  
4. Clean the bushing part of the transfer  
roller.  
5. Is the HVPS normal?  
5. If the problem is still not solved,  
replace the developer.  
Service Manual  
4-9  
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TROUBLESHOOTING  
4.2.9 Ghost (1)  
• Description  
Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
1. Bad contacts caused by contamination  
from toner particles between high voltage  
terminal in the main body and the elec-  
trode of the Developer.  
1. Clean the terminals when contaminated by  
toner particles.  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
2. Bad contacts caused by contamination  
from toner particles between high voltage  
terminal in the main body and the one in  
the HVPS board.  
2. Occur in the developer cartridge, replace  
the developer and try to print out.  
3. The life of developer is expired.  
3. Replace the engine board if not solved by  
the above directions 1-2.  
4. Transfer roller lifetime(60.000 sheets) has  
expired.  
4. If not solved by the direction 3, check the  
transfer roller lifetime and replace it.  
5. Abnormal low temperature(below 10°C).  
5. Wait about 1 hour after power on before  
using printer.  
4.2.10 Ghost (2)  
Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.  
(When printing on card stock or transparencies using manual feeder)  
• Description  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
When printing on card stock thicker than nor-  
mal paper or transparencies such as OHP,  
higher transfer voltage is required.  
Select 'Thick Mode' on paper type menu from  
the software application and after using return-  
ing to the original mode is recommended.  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Service Manual  
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TROUBLESHOOTING  
4.2.11 Ghost (3)  
• Description  
White ghost occurs in the black image printing at 32mm intervals.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
1. The life of the developer may be expired.  
1. Occur in the developer cartridge, replace  
the developer and try to print out.  
Digital Printer  
Digital Printer  
2. The abnormal voltage and bad contact of  
the terminal of the supply roller  
2. Check the approved voltage of the supply  
roller and contact of the terminal and adjust  
if necessary.  
Digital Printer  
Digital Printer  
4.2.12 Ghost (4)  
• Description  
Ghost occurs at 47 mm intervals.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
The temperature of the fuser is maintained  
high.  
1. Disassemble the fuser and remove the  
contaminated toner particles on the roller  
and clean the foreign matter between  
Thermistor and Heat roller.  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
(
Caution : can be deformed)  
4.2.13 Satins on the Face of Page  
• Description  
The background on the face of the printed page is stained.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. Toner leakage due to improperly sealed  
developer.  
1. Replace the developer cartridge.  
2. If the transfer roller is contaminated, satins  
on the face of page will occur.  
2. If the transfer roller is contaminated, run PC  
Cleaning Mode Print 2 or 3 times.  
And perform Self-Test 2 or 3 times to  
remove contamination.  
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TROUBLESHOOTING  
4.2.14 Satins on Back of Page  
• Description  
The back of the page is stained at 47 mm intervals.  
Check and Cause  
Solution  
Digita
Digita
Digital Printer  
Digital Printer  
Digital Printer  
1. Transfer roller is contaminated.  
1. Perform the OPC Cleaning Mode Print 2 or  
3 times. Run Self-Test to remove the conta-  
mination of the transfer roller.  
2. Pressure roller is contaminated.  
2. Replace the transfer roller if contaminated  
severely.  
3. Disassemble the fuser and clean the  
H/R(Heat Roller) and P/R(Pressure roller).  
And check the area between H/R and  
Thermistor. If contaminated, clean the area  
not to be deformed.  
4.2.15 Blank Page Print out (1)  
• Description  
Blank page is printed.  
Check and Cause  
Solution  
Bad ground contacts in OPC and/or devel-  
oper.  
Remove contamination of the terminals of the  
developer and the unit.  
4.2.16 Blank Page Print out (2)  
1. Blank page is printed.  
2. One or several blank pages are printed.  
• Description  
3. When the printer turns on, several blank pages print.  
Check and Cause  
Solution  
1. Bad ground contacts in OPC and/or  
developer.  
1. Remove contamination of the terminals of  
the developer.  
2. Abnormal solenoid.  
2. Perform the engine self test using DCU to check  
if the Solenoid is normal.(refer to code 06)  
3. If not solved by the above directions 1-2,  
Replace the engine board.  
4. Turn the power off, delete the data of PC  
and try printing again.  
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TROUBLESHOOTING  
4.3 bad discharge  
4.3.1 Wrong Print Position  
• Description  
Printing begins at wrong position on the paper.  
Check and Cause  
Solution  
Replace the defective actuator  
Wrong sense time caused by defective feed sensor  
actuator.  
4.3.2 JAM 0  
L S U  
• Description  
Fuser  
Toner Cartridge  
CR  
OPC  
DR  
SR  
EXIT  
PR  
Sensor  
1. Paper is not exited from the cassette.  
MP Sensor  
Feed  
Sensor  
TR  
FR  
2. Jam-0 occurs if the paper feeds into the printer.  
R
K/  
C
I
P
Empty Sensor  
Check and Cause  
Solution  
1. Check the Solenoid by using DCU diagnostic mode  
06.  
1. Replace the solenoid.  
2. Check if the pad is loose due to bad sealing of the  
side-pad.  
2. Replace the side-pad Assembly L or R, if necessary.  
3. Check the surface of the roller-pickup for foreign mat-  
ter.  
3. Clean with soft cloth dampened with IPA(Isopropyl  
Alcohol) or water.  
4. If the paper feeds into the printer rand Jam 0 occurs,  
perform DCU to check feed-sensor of the engine  
board.  
4. Replace the SMPS-HVPS and/or Sensor.  
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TROUBLESHOOTING  
4.3.3 JAM 1  
L S U  
CR  
• Description  
Fuser  
Toner Cartridge  
DR  
OPC  
SR  
EXIT  
PR  
Sensor  
1. Recording paper is jammed in front of or inside the fuser.  
2. Recording paper is stuck in the discharge roller and in the  
fuser just after passing through the Actuator-Feed.  
MP Sensor  
Feed  
FR  
Sensor  
TR  
R
K/  
C
I
P
Empty Sensor  
Check and Cause  
Solution  
1. If the recording paper is jammed in front of or inside  
the fuser. (Perform DCU diagnostic code 08)  
1. Replace the SMPS.  
2. If the recording paper is stuck in the discharge roller  
and the fuser just after passing through the Actuator-  
Feed, Feed Actuator may be defective.  
2. Reassemble the Actuator-Feed and Spring-Actuator  
if the returning is bad.  
4.3.4 JAM 2  
L S U  
• Description  
Fuser  
Toner Cartridge  
CR  
OPC  
DR  
SR  
EXIT  
1. Recording paper is jammed in front of or inside the fuser.  
2. Recording paper is stuck in the discharge roller and in the  
fuser just after passing through the Actuator-Feed.  
PR  
Sensor  
MP Sensor  
Feed  
FR  
Sensor  
TR  
R
K/  
C
I
P
Empty Sensor  
Check and Cause  
Solution  
1. If the paper is completely fed out of the printer, but Jam  
2 occurs : Exit sensor is defective.  
1. Check if the exit sensor actuator is defective.  
• Check if the actuator exit is unformed (Check if the  
lever part is unformed in shape).  
• After the paper is completely discharged, actuator  
Exit should return to the original position to shut the  
photo-sensor. Sometimes it takes longer hour than it  
should and does not return.  
• Check whether burrs occur in the assembly part of  
the actuator exit or not and if the actuator is  
smoothly operated.  
• Check if foreign matters and wire get caught in the  
actuator exit's operation.  
2. If the paper is rolled in the Fuser Roller:  
• This occurs when a Guide claw is broken away or  
transformed.  
2. If the paper is stuck in the fuser : disassemble the  
fuser and remove the jammed paper, and clean the  
surface of the pressure roller with dry gauze.  
• It occurs when the Spring of a Guide claw is broken  
away or transformed.  
• It occurs when the Heat-Roller or Pressure-Roller is  
seriously contaminated with the toner.  
3. Paper is accordion in the fuser.  
3. Remove the jammed paper after disassembling the  
fuser : Clean the surface of the pressure roller with  
dry gauze.  
• Remove the toner particles stained on the rib.  
• Check the assemblage and performance of the exit.  
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4-14  
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TROUBLESHOOTING  
4.3.5 Multi-Feeding  
• Description  
Multiple sheets of paper are fed at once.  
Check and Cause  
Solution  
1. Solenoid malfunction(the solenoid does not work  
properly): Perform DCU Diagnostic Code 06.  
1. Replace the solenoid if necessary.  
2. Pad-Friction is contaminated with foreign matter.(oil...)  
3. The face of paper is blended.  
2. Clean the pad friction with soft clothe dampened  
with IPA(Isopropyl Alcohol).  
3. Use the smooth paper.  
4.3.6 Paper rolled in the Fuser  
• Description  
If contaminated at intervals of 57mm on the back of a paper.  
Check and Cause  
Solution  
1. Contamination of the pressure roller or heat  
roller (Background, Hot off set).  
1. After disassembling the fuser, clean contami-  
nation between the heat roller and the ther-  
mostor and remove the contamination of the  
pressure roller.  
2. Check the claw of the fuser whether it is unfit-  
ted.  
2. If there is heavy background, repair it by the  
background troubleshooting method.  
3. The surface of the heat roller with IPA or  
water  
4. Check the warp or separation of the sprint  
claw and the holder plate claw, and then man-  
age it.  
Service Manual  
4-15  
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TROUBLESHOOTING  
4.3.7 Paper rolled in the Toner Cartridge (OPC Drum)  
• Description  
Paper is rolled up in the OPC.  
Check and Cause  
Solution  
1. Paper is too much thin.  
1. Recommend to use normal paper.  
2. The face of paper is curled.  
2. How to remove the rolled in the OPC Drum.  
• Remove the paper while turning the OPC  
Drum against the ongoing direction.  
• C;eam fomger[romts on the OPC Drum  
spft;u with IPA(Isopropyl Alcohol) or tissue.  
Service Manual  
4-16  
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TROUBLESHOOTING  
4.4 Malfunction  
4.4.1 All LEDs blinking (Fuser Error)  
1. All the lamps on the operator panel blink.  
2. Gear of the fuser does not work and breaks away melt away.  
When printing, motor breaks away from its place due to defective fuser gear.  
• Description  
Check and Cause  
Solution  
1. Check if the thermostat, AC wire and Heat Lamp is  
open.  
1. If the thermostat is open replace the fuser and  
check following items.  
2. Check if the thermistor sensor is in place.  
2. If the thermistor sensor device is located deep in the  
sponge, replace the fuser.  
3. Check if the heat lamp works properly.  
3. Check if the circuit of overheat mode works properly.  
4. Run DCU mode : Perform DCU diagnostic code 10.  
5. Replace Fuser.  
4. Check if the overheat circuit works properly.  
5. The fuser gear is defective due to melting away.  
4.4.2 All LEDs blinking (Scan Error)  
• Description  
1. All lamps on the operator panel blink.  
Check and Cause  
Solution  
DCU Mode : Perform DCU diagnostic code 05. If the DCU  
error code 95 is displayed, replace LSU.  
Replace LSU.  
If you cannot solve the problem after you replace LSU,  
replace the main board.  
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4-17  
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TROUBLESHOOTING  
4.4.3 Not function of the gear of the fuser due to melting away  
• Description  
The motor breaks away from its place due to gear melting away.  
Check and Cause  
Solution  
DCU Mode : Check if the Error States '60' '62' '68' occur.  
Check the operation of Fuser Erasing Lamp  
On/Off with the Error Code Check -10-.  
1. Replace the Fuser.  
2. Replace the Main Control board.  
4.4.4 Paper Empty  
• Description  
The paper lamp on the operator panel is on even when paper is loaded in the cassette.  
Check and Cause  
Solution  
1. Bending or deformation of the actuator of the paper sen-  
sor.  
1. Replace the defective actuator.  
2. The function of the engine board is defective Perform  
DCU mode : Perform DCU diagnostic code 8.  
2. Replace the engine board.  
4.4.5 Paper Empty without indication  
• Description  
The paper lamp on the operator panel does not come on when the paper cassette is empty.  
Check and Cause  
Solution  
1. Bending or deformation of the actuator of the paper sen-  
sor.  
1. Replace the defective actuator.  
2. The function of the engine board is defective Perform.  
DCU mode : Perform DCU diagnostic code 8.  
2. Replace the engine board.  
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TROUBLESHOOTING  
4.4.6 Cover Open  
• Description  
The ERROR lamp is on even when the print cover is closed.  
Check and Cause  
Solution  
1. The Hook Lever in the top cover may be defective.  
1. Replace the hook lever, if defective.  
2. Check the connector (Engine B’d↔ HVPS) and circuit of  
the cover switch department in the Main Control board.  
Perform DCU mode : If Error state '64' occurs, Check the  
related codes of the Cover Open Error.  
2. Check the insertion of the Cover Open S/W  
Connect.  
3. Replace the Main Control board or Cover Open  
S/W.  
4.4.7 No lamp on when the cover is open  
• Description  
The ERROR lamp does not come on even when the printer cover is open  
Check and Cause  
Solution  
1. Check the connector(CN8) and circuit of the cover switch  
department in the Main Control board. Perform DCU  
mode : If Error state '64' occurs, Check the related codes  
of the Cover Open Error  
1. Check the insertion of the Cover Open S/W  
Connect.  
2. Replace the Main Control board or Cover Open  
S/W.  
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4-19  
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TROUBLESHOOTING  
4.4.8 Defective motor operation  
• Description  
Main motor is not driving when printing, and paper does not feed into the printer, resulting 'Jam 0'.  
Check and Cause  
Solution  
1. Motor harness or sub PCB may be defective.  
1. Check the motor harness, replace it, if defective.  
2. Perform DCU diagnostic code 00 and Check the motor  
operation.  
2. Replace the SMPS, if necessary.  
4.4.9 No Power  
• Description  
When system power is turned on, all lamps on the operator panel do not come on.  
Check and Cause  
Solution  
1. Check if the power input and SMPS output are normal.  
1. Replace the power supply cord or SMPS.  
2. Check the inferiority of LED-Panel on the front-cover if  
the LED of Panel does not appear after normal warming-  
up.  
2. Replace the control board.  
3. Replace the LED-panel.  
Service Manual  
4-20  
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TROUBLESHOOTING  
4.4.10 Vertical Line Getting Curved  
• Description  
When printing, vertical line gets curved.  
Check and Cause  
Solution  
1. If the supply of +24v is unstable in the Main Control board  
linking with LSU, check drive by DCU Mode : LSU Check  
-05- LSU Motor on.  
1. Replace LSU.  
2. Replace the Main Control board.  
Service Manual  
4-21  
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TROUBLESHOOTING  
4.5 Toner Cartridge Service  
It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied  
by the Samsung Electronic or caused by non-licensed refill production.  
4.5.1 Precautions on Safe-keeping of Toner Cartridge  
Excessive exposure to direct light more than a few minutes may cause damage to the cartridge.  
4.5.2 Service for the Life of Toner Cartridge  
If the printed image is light due to the life of the toner, you can temporarily improve the print quality by  
redistributing the toner(Shake the toner cartridge), however, you should replace the toner cartridge to solve  
the problem thoroughly.  
4.5.3 Redistributing Toner  
When toner is low, faded or light areas may appear on a printed page. You may be able to temporarily  
improve the print quality by redistributing the toner. The following procedures may allow you to finish the  
current print job before replacing the toner cartridge.  
1) Grasp the front cover and pull it toward you to  
open.  
3) Gently shake the toner cartridge from side to side  
five or six times to redistribute the toner.  
2) Remove the toner cartridge from the printer  
Note :  
If the toner gets on your clothing, wipe it off with a dry  
cloth and wash clothing in cold water. Hot water sets  
toner into fabric.  
Note :  
Avoid reaching too far into the printer. The fusing  
area may be hot.  
To prevent damage to the toner cartridge, do not  
expose it to light for more than a few minutes.  
4) Reinsert the toner cartridge into the printer.  
Ensure that the toner cartridge snaps into place.  
5) Close the front cover. Make sure that the cover is  
securely closed.  
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4-22  
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TROUBLESHOOTING  
4.5.4 Signs and Measures at Poor toner cartridge  
Fault  
Signs  
Cause & Check  
Solution  
Light image and  
partially blank  
image  
• The printed image  
is light or unclean  
and untidy.  
1. If the image is light or unclean 1. All of 1, 2, 3 above-  
and untidy printed image -  
Shake the developer and  
then recheck.  
(1)NG : Check the weight of  
the developer  
If it become better by shaking,  
replace with a new developer  
after 35.3-100 sheets in the  
closing state of the life span.  
(The life is ended.)  
• Some part of the  
image is not print-  
ed.  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
(2)OK : Lack of toner, so the  
life is nearly closed.  
• Periodically a noise 2. Some part of image is not  
as "tick tick" occurs.  
2. In case of 2-  
printed - Shake the develop-  
er and then recheck.  
(1)NG : Check the weight of  
the developer and  
If it becomes better after clean-  
ing the LSU window, then the  
developer is normal.  
(Because of foreign substance  
on the LSU window, the image  
has not been printed partly.)  
clean the LSU window  
with a cotton swab,  
then recheck.  
(2)OK : Lack of toner, so the  
life is nearly closed.  
3. Periodically a noise as "tick  
tick" occurs - Measure the  
cycle and the weight of the  
developer.  
3. In case of 3-  
If the cycle of noise is about 2  
seconds, the toner inside the  
developer has been nearly  
exhausted.( Purchase and  
replace with a new developer  
after using about 200 sheets at  
the point of occurrence)  
4. In case of 3-  
4. White vertical stripes on the  
whole screen or partly :  
Check the weight of the  
developer.  
This is a phenomenon caused  
by lack of toner, so replace with  
a new developer.  
Toner  
Contamination  
• Toner is fallen on  
the papers periodi-  
cally.  
1. Toner is fallen on the paper  
periodically.  
(1)Check the cycle of the  
falling of the toner.  
1. If both ends of the OPC drum  
are contaminated with toner:  
Check the life of the developer.  
• Contaminated with  
toner on prints part-  
ly or over the whole  
surface.  
(2)Check the appearance of  
both ends of the developer  
OPC drum.  
2.The center of the printed mat-  
ter is contaminated with toner.  
(1)Check whether foreign sub-  
stances or toner are stuck  
to the terminal (contact  
point) of the developer.  
(2)Check whether the state of  
the terminal assembly is  
normal.  
2. Check whether it could be recy-  
cled.  
3. If it cannot be recycled:  
Replace the developer.  
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TROUBLESHOOTING  
Fault  
Signs  
Cause & Check  
Solution  
1. If light or dark periodical black  
dots occur, this is because the  
developer rollers are contami-  
nated with foreign substance  
or paper particles.  
(1)37.7mm interval : Charged  
roller  
(2)75.5mm interval : OPC cycle  
White Black spot  
• Light or dark black  
dots on the image  
occur periodically.  
1. In case of 1 above -  
Run OPC Cleaning Mode Print  
4-5 times repeatedly to remove.  
Especially check foreign sub-  
stance on the OPC surface, then  
remove them with a clean gauze  
moistened with IPA(Isopropyl  
Alcohol) not to damage OPC if  
necessary.  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
• White spots occur  
in the image period-  
ically.  
Never use usual alcohol.  
2. If white spots occur in a black  
image at intervals of 75.5mm,  
or black spots occur else-  
where, the OPC drum is dam-  
aged or foreign substance is  
stuck to the surface.  
2. In case of 2  
If they are not disappeared by  
running OPC Cleaning Mode  
Print 4-5 times.  
:
at intervals of 37.7mm - Replace  
the developer.  
: at intervals of 75.5mm - Remove  
foreign substance.  
: Broken image - Replace the  
developer according to careless-  
ness.  
3. If a black and white or graphic 3. In case of 3 - Exchange the  
image is partially broken at  
irregular intervals, the transfer  
roller's life has been expired or  
the transfer voltage is abnor-  
mal.  
transfer roller because the life of  
the transfer roller in use has been  
expired. (Check the transfer volt-  
age and readjust if different.)  
Recycled product • Poor appearance of 1. Poor appearance of the devel- 1. In case of 1 -  
the developer.  
oper.  
(1)If there is an evidence of disas-  
sembling the developer.  
(2)If materials other than normal  
parts of the developer are  
added or substituted.  
(1)Check the damage to label  
and whether different materi-  
als are used.  
(2)Check the appearance of  
parts of the developer, such  
as frame, hopper.  
• Unclean and rough  
printouts.  
• Bad background in  
the image.  
2. Unclean and rough printouts.  
(1)Check whether foreign sub-  
stance or toner are stuck to  
the terminal (contact point) of  
the developer.  
(2)Check whether the state of  
the terminal assembly is nor-  
mal.  
2. In case of 2 - If there are any  
abnormals in connection with the  
situation of 1.  
(1)It occurs when the developer  
is recycled over 2 times.  
(2)If toner nearly being expired  
are collected to use, it is  
judged as the recycled devel-  
oper.  
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TROUBLESHOOTING  
4.6 Bad Environment of The Software  
4.6.1 The printer is not working (1)  
• Description  
While Power turned on, the printer is not working in the printing mode.  
Check and Cause  
Solution  
1. Run Self-Test Mode : Turn the power on while pressing  
the test printing button for 2 or 3 seconds before printing  
works.  
1.Check the power of the printer and perform the Self-  
Test. If the test printing works, that means no prob-  
lems in the printer itself. If the test printing does not  
work, that means bad functioning of the printer(not  
because of software). Perform DCU to check the  
Error Status.  
2. Check if the PC and the printer is properly connected  
and the toner cartridge installed.  
2. Replace the printer cable. If the problems not solved  
even after the cable replaced, check the amount of  
the remaining tone.  
(refer to Toner Cartridge Service 7.4)  
3. Printing is nor working in the Windows.  
3. Check if the connection between PC and printer port  
is proper. If you use windows, check if the printer dri-  
ver in the controller is set up. If the printer driver is  
properly set up, check in which program the printing  
is not working. The best way to find out is to open the  
memo pad to check the function of printing. If it is not  
working in a certain program, adjust the setup the  
program requires. Sometimes, the printout is normal  
within the Windows basic programs, but it's not work-  
ing in a particular program. In such case, install the  
new driver again. If not working in the Windows basic  
program, Check the setup of the port of CMOS is on  
ECP. And check the address of IRQ 7 and 378  
4. If the scanner needs to be connected to the printer,  
first the remove the scanner from the PC to see if the  
printer is properly working alone.  
4. Check if the printer cable is directly connected to periph-  
eral devices  
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TROUBLESHOOTING  
4.6.2 The printer is not working (2)  
After receiving the printing order, no response at all or the low speed of printing  
occurs due to wrong setup of the environment rather than malfunction of the printer itself.  
• Description  
Check and Cause  
Solution  
1. Secure more space of the hard disk.  
1. Not working with the message 'insufficient printer  
memory' means hard disk space problem rather than  
the RAM problem. In this case, provide more space  
for the hard disk. Secure more space using the disk  
utilities program.  
2. Printing error occurs even if there is enough space in  
the hard disk.  
2. The connection of the cable and printer port is not  
proper. Check if the connection is properly done and  
if the parallel port in CMOS is rightly set up.  
3. Check the parallel-port-related items in the CMOS  
Setup.  
3. As a printer port, Select ECP or SPP among  
SPP(Normal), ECP, and EPP modes(increase print-  
ing speed) SPP normal mode support 8-bit data  
transfer, while ECP Mode transfer the 12-bit data.  
4. Reboot the system to print.  
4. If the regular font is not printing, the cable or the  
printer driver may be defective.  
Turn the PC and printer off, and reboot the system  
to print again. If not solved, double-click the printer in  
my computer If the regular fonts are not printed this  
time again. the cable must be defective so replace  
the cable with new one.  
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TROUBLESHOOTING  
4.6.3 Abnormal Printing  
The printing is not working properly even when the cable has no problem.  
(even after the cable is replaced)  
If the printer won't work at all or the strange fonts are repeated, the printer driver may be defec-  
tive or wrong setup in the CMOS Setup.  
• Description  
Check and Cause  
Solution  
1. Set up the parallel port in the CMOS SETUP.  
1. Select SPP(Normal) or ECP LPT Port the among  
ECP, EPP or SPP in the CMOS Setup.  
2. Printer Driver Error.  
2. Check the printer in My Computer.(to see if the  
printer driver is compatible to the present driver or  
delete the old driver, if defective and reinstall the new  
driver)  
3. Error message from insufficient memory.  
(The printing job sometimes stops or due to insufficient  
virtual memory, but it actually comes from the insuffi-  
cient space of the hard disk.)  
3. Delete the unnecessary files to secure enough  
space of the hard disk and start printing job again.  
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TROUBLESHOOTING  
4.6.4 SPOOL Error  
To spool which stands for "simultaneous peripheral operations online" a computer document or  
task list (or "job") is to read it in and store it, usually on a hard disk or larger storage medium so  
that it can be printed or otherwise processed at a more convenient time (for example, when a  
printer is finished printing its current document).  
• Description  
Check and Cause  
Solution  
1. Insufficient space of the hard disk in the directory  
assigned for the basic spool.  
1. Delete the unnecessary files to provide more space  
to start printing job.  
2. If the previous printing error not solved.  
2. If there are some files with the extension name of  
****.jnl, Delete them and Reboot the Windows to  
restart printing job.  
3. When expected to collide with other program.  
3. Shut down all other programs except the current  
one, if possible.  
4. When an application program or the printer driver is  
damaged.  
4. Delete the printer driver completely and reinstall it.  
5. When some files related to OS are damaged or virus  
infected.  
5 After rebooting the computer, check for viruses,  
restore the damaged files and reinstall the program  
to do the printing job.  
6. Memory is less than suggested one.  
6. Add up enough memory to the PC.  
How to delete the data in the spool manager.  
In the spool manager, the installed drivers and the list of the documents waiting to be printed are shown.  
Select the document to be deleted and check the delete menu.  
If you intend to delete the current document being printed, the data being transferred to the printer will be put  
out and then the document is removed. Before choosing the document, the menu is still inactive.  
Or put the document out of the list and repeat the routine as in the above or finish the spool manager.  
Service Manual  
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EXPLODED VIEWS AND PARTS LIST  
5. Exploded Views and Parts List  
Update on January .10.2003 by SEC  
5
5.1 Main Assembly Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-2)  
5.2 Frame Assembly Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-4)  
5.3 Drive Unit Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-7)  
5.4 Fuser Unit Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-8)  
5.5 Cassette Unit Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-10)  
Service Manual  
5-1  
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EXPLODED VIEWS AND PARTS LIST  
5.1 Main Assembly Exploded view  
Service Manual  
5-2  
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EXPLODED VIEWS AND PARTS LIST  
< Main Assembly Parts List >  
SA. : Service Available  
NO  
DESCRIPTION  
SEC CODE  
Q’TY  
SA  
REMARK  
0
SET  
1
ELA UNIT-FRAME LOWER, 110V, XRX  
ELA UNIT-FRAME LOWER, 220V, XRX  
ELA HOU-COVER TOP  
LENS LED-LED  
JC96-02732A  
JC96-02734A  
JC97-01748D  
JC67-00026A  
JC63-00102A  
JC63-00101A  
JC72-00973A  
JC72-00387A  
JC72-01001A  
6107-001169  
JC64-00039A  
6003-000264  
JC61-00606A  
JC39-00241A  
JC31-00027A  
JC59-00018A  
JC92-01439A  
JC63-00104A  
JC39-00242A  
JC96-02733A  
JC97-01748D  
JC97-01749K  
JC63-00103A  
JC70-00302A  
JC70-00304A  
JC66-00387A  
JC70-00303A  
6003-000264  
TBD  
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
1
6
2
1
1
1
1
O
O
O
X
X
X
X
X
X
X
X
X
O
O
O
O
O
O
O
O
O
O
X
X
X
X
X
X
O
O
O
X
O
O
O
O
O
O
X
X
X
O
X
X
110V  
220V  
2
2-1  
2-2  
2-3  
2-4  
2-5  
2-6  
2-7  
2-8  
2-9  
COVER-TOP  
COVER-REAR  
PMO-STACKER_RX  
PMO-BUSHING_F/DOWN  
PMO-SUB STACKER  
SPRING-KEY  
KEY-ON LINE  
SCREW-TIPTITE  
3
4
5
6
7
8
9
PLATE-P-CHANNEL  
CBF HARNESS-MOTOR  
FAN-DC  
UNIT-LSU  
PBA MAIN-PANEL  
COVER PCB-M-PCB  
CBF HARNESS-LSU 1400  
ELA HOU-RX DRIVE 1400  
MEA UNIT-COVER FRONT, XEROX  
MEA UNIT-COVER FRONT, XEROX  
COVER-FRONT  
10  
11  
P3120  
P3130  
11-1  
11-2  
11-3  
11-4  
11-5  
11-6  
ADJUST-MANUAL L  
ADJUST RACK-MANUAL  
GEAR-RACK_PINION  
ADJUST-MANUAL R  
SCREW-TIPTITE  
12  
MEA ETC-CASSETTE 1400  
PBA MAIN-CONTROLLER,GDI  
PBA MAIN-CONTROLLER,PCL  
MEA ETC-SHIELD ENGINE  
CBF HARNESS-ENGINE  
CBF HARNESS-ENGINE,  
SMPS-HVPS  
13  
JC92-01426B  
JC92-01424B  
JC96-02663A  
JC39-00240A  
JC39-00240B  
JC44-00046A  
JC44-00047A  
JC61-00601A  
JC63-00107A  
6003-000264  
6003-000119  
6003-000301  
TBD  
P3120  
P3130  
14  
14-1  
P3120  
P3130  
110V  
14-2  
SMPS-HVPS  
220V  
14-3  
14-4  
14-5  
14-6  
14-7  
BRACKET-INLET  
SHIELD-ENGINE  
SCREW-TIPTITE  
SCREW-TIPTITE  
SCREW-TIPTITE  
15  
TRANSFER ROLLER ASS’Y  
ROLLER-TRANSFER ROLLER  
GEAR-TRANSFER  
15-1  
15-2  
JC66-00528A  
JC66-00395A  
O: Service available X: Service not available  
Service Manual  
5-3  
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EXPLODED VIEWS AND PARTS LIST  
5.2 Frame Assembly Exploded view  
Service Manual  
5-4  
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EXPLODED VIEWS AND PARTS LIST  
< Frame Assembly Parts List >  
SA. : Service Available  
NO  
DESCRIPTION  
SEC CODE  
JC96-02732A  
JC61-00579A  
JC61-00607A  
JC61-00604A  
JC61-00594A  
JC66-00038A  
JC75-10529A  
JC66-00378A  
6107-001163  
JC72-00143A  
JC61-00582A  
JC72-41081A  
JC72-41082A  
JC75-00049A  
JC70-00312A  
JC70-00313A  
JC61-00592A  
JC72-00983A  
JC72-00974A  
JC72-00985A  
JC61-00038A  
JC70-00315A  
JC72-00984A  
JC72-00976A  
JC72-00975A  
JC72-00977A  
JC70-00309A  
6107-001162  
JC66-00526A  
JC72-00382A  
JC66-00598A  
6107-001165  
JC70-00307A  
JC61-00583A  
JC67-00027A  
JC61-00588A  
JC61-00047A  
6107-001164  
JC72-00102A  
JC70-00310A  
Q’TY  
1
1
1
1
1
1
2
1
1
2
4
4
4
4
3
1
1
1
1
1
2
1
1
1
1
1
1
1
1
5
1
1
1
1
1
1
1
1
1
1
SA  
X
X
X
X
X
X
X
X
X
X
X
X
X
O
X
X
X
X
O
X
X
X
X
O
O
O
X
X
X
X
O
X
X
O
O
X
X
X
X
X
REMARK  
0
ELA UNIT-FRAME ASSY  
1
FRAME-Base  
2
GUIDE-TR  
3
PLATE-SAW  
4
GUIDE-TR RIB  
5
GEAR-EXIT F/DOWN  
MEC-BEARING,EXIT  
ROLLER-EXIT_F/DOWN  
SPRING-EXIT_F/DOWN  
PMO-GEAR_EXIT_DRV16  
HOLDER-EXIT_F/DOWN  
PMO-ROLLER_EXIT,MAIN  
PMO-ROLLER_EXIT,FR  
MEC-TERMINAL  
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
IPR-TERMINAL CON  
IPR-TERMINAL CR  
HOUSING-TERMINAL  
PMO-LOCKER CST  
PMO-ACTUATOR CVR OPEN  
PMO-PLATE GUIDE DEVE_R  
SPRING-GUIDE DEVE  
IPR-GROUND_ROLLER IDLE  
PMO-PLATE GUIDE DEVE_L  
PMO-ACTUATOR FEED  
PMO-ACTUATOR EMPTY  
PMO-ACTUATOR MANUAL  
IPR-GROUND EARTH TR  
SPRING-TR_R  
ROLLER-FEED ROLLER1  
PMO-BUSHING TX  
ROLLER-FEED  
SPRING-ACT,MANUAL  
IPR-EARTH TRANSFER  
HOLDER-PTL  
LENS-PTL  
BUSH-TR_L  
SPRING-TR_L  
SPRING-ACT_FEED  
PMO-BUSHING TR_L  
IPR-GROUND FUSER  
O: Service available X: Service not available  
Service Manual  
5-5  
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EXPLODED VIEWS AND PARTS LIST  
< Frame Assembly Parts List Cont. >  
SA. : Service Available  
NO  
DESCRIPTION  
SEC CODE  
JC66-00527A  
JC61-00585A  
JC61-70958A  
JC70-00335A  
6107-001170  
JC66-00377A  
JC70-00308A  
JC33-00009A  
JC33-00010A  
TBD  
Q’TY  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
2
1
1
1
2
2
1
1
1
1
1
1
1
1
1
SA  
X
X
X
X
X
X
X
O
O
X
X
X
X
X
X
X
X
X
X
X
X
O
X
X
X
X
X
X
X
O
X
X
X
X
O
REMARK  
40  
SHAFT-FEED IDLE  
41  
42  
43  
44  
45  
46  
47  
48  
49  
BUSH-FEED IDLE  
SPRING-FEED IDLE  
IPR-P_GROUND_DRIVE2  
SPRING-CAM PICK-UP  
CAM-PICK_UP  
IPR-GROUND DRIVE  
SOLENOID-HB (PICK-UP)  
SOLENOID-HB (MANUAL)  
TBD  
49-1  
PMO-GEAR PICK_UP B  
PMO-GEAR PICK_UP A  
SPRING-PICK_UP GEAR  
BRACKET-FEED  
JC72-00980A  
JC72-00979A  
6107-001167  
JC61-00602A  
JC70-00311A  
JC66-00398A  
6044-000001  
JC66-00394A  
JC66-00396A  
JC61-00718A  
JC73-00027A  
TBD  
49-2  
49-3  
50  
51  
52  
53  
54  
55  
56  
57  
58  
IPR-GROUND TR  
SHAPT-FEED  
RING-CS  
GEAR-FEED 2  
GEAR-IDLE 23  
GUIDE-PAPER  
RMO-RUBBER_FOOT  
PICK_UP ASS’Y  
58-1  
BUSH-PICK_UP_L  
SHAFT-PICK_UP  
JC61-00586A  
JC66-00399A  
JC61-00593A  
JC72-00982A  
JC72-01231A  
JC61-00587A  
JC61-00591A  
TBD  
58-2  
58-3  
58-4  
58-5  
58-6  
58-7  
STOPPER-PICK_UP  
PMO-IDLE PICK_UP  
SPONGE-ROILLER PICK UP  
BUSH-PICK_UP_R  
HOUSING-PICK_UP  
CLUTCH ASS’Y(FEED ASS’Y)  
GEAR-FEED 1  
59  
59-1  
59-2  
59-3  
59-4  
JC66-00393A  
JC72-00978A  
6107-001164  
JC72-00981A  
TBD  
PMO-COLLAR_SPRING  
SPRING-CLUTCH  
PMO-HUB CLUTCH  
FUSER  
60  
O: Service available X: Service not available  
Service Manual  
5-6  
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EXPLODED VIEWS AND PARTS LIST  
5.3 Driver Unit Exploded view  
0
7
6
8
1
9
HARNESS-MOTOR  
2
4
5
3
4
5
< Driver Unit Parts List >  
SA. : Service Available  
NO  
DESCRIPTION  
SEC CODE  
JC96-02733A  
JC61-00598A  
JC66-00388A  
JC66-00391A  
JC66-00389A  
6044-000231  
JC61-00599A  
JC66-00390A  
JC66-00392A  
JC31-00028A  
Q’TY  
SA  
O
X
REMARK  
0
ELA HOU-RX DRIVE 1400  
BRACKET-GEAR 1400  
GEAR-FUSER DRV  
GEAR-RDCN Z132/19  
GEAR-PICK_UP DRV  
RING-E  
1
1
1
1
2
2
1
1
1
1
1
2
3
4
5
6
7
8
9
X
X
X
X
BRACKET-MOTOR 1400  
GEAR-RDCN Z7128  
GEAR-RDCN Z7322  
MOTOR STEP-7.5  
X
X
X
X
O: Service available X: Service not available  
Service Manual  
5-7  
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EXPLODED VIEWS AND PARTS LIST  
5.4 Fuser Unit Exploded view  
0
9
8
10  
7
6
33  
4
11  
5
3
2
12  
32  
1
32  
17  
13  
16  
15  
14  
18  
22  
19  
23  
20  
24  
21  
25  
31  
27  
30  
26  
29  
28  
Service Manual  
5-8  
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EXPLODED VIEWS AND PARTS LIST  
< Fuser Unit Parts List >  
SA. : Service Available  
NO  
DESCRIPTION  
SEC CODE  
TBD  
Q’TY  
SA  
O
O
X
X
X
X
X
O
X
X
X
X
X
X
O
X
O
O
O
X
O
X
O
O
X
O
X
X
X
X
X
X
X
X
X
X
X
X
X
REMARK  
0
ELA HOU-FUSER 110V  
ELA HOU-FUSER 220V  
COVER-FUSER  
1
1
1
4
4
2
2
110V  
220V  
TBD  
1
JC63-00105A  
JC61-00584A  
JC61-00064A  
JC72-60059A  
JC61-70976A  
JC47-00005A  
JC72-00143A  
JC66-00396A  
6044-000001  
JC66-00397A  
JC70-00275A  
JC70-00450A  
1404-001298  
JC70-00449A  
JC39-00239A  
JC39-00238A  
JC66-00564A  
JC61-00589A  
JC66-00601A  
JC61-00590A  
TBD  
2
HOLDER-PLATE CLAW  
SPRING ETC-CLAW  
PMO-ROLLER EXIT  
SPRING-EXIT F_UP  
THERMOSTAT-150  
PMO-GEAR_EXIT_DRV16  
GEAR-IDLE 23  
3
4
5
6
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
3
1
1
1
1
2
1
1
5
1
4
8
9
RING-CS  
10  
11  
12  
13  
14  
15  
GEAR-RDCN 2515  
IPR-ELECTRODE_LAMP  
ELECTRODE-WIRE_L  
THERMISTER-NTC HF  
ELECTRODE-WIRE_R  
CBF HARNESS-FUSER(110V)  
CBF HARNESS-FUSER(220V)  
GEAR-FUSER,Z37  
110V  
220V  
16  
17  
18  
19  
20  
BUSH-HR_L  
NPR-ROLLER_HEAT  
BUSH-HR_R  
LAMP-HALOGEN(110V)  
LAMP-HALOGEN(220V)  
ROLLER-EXIT F_UP  
ROLLER-PRESSURE  
BEARING-PRESSURE  
SPRING-PR(1400)  
110V  
220V  
TBD  
21  
22  
23  
24  
25  
26  
27  
28  
29  
31  
33  
30  
32  
??  
??  
JC66-00380A  
JC66-00600A  
JC66-10901A  
6107-001168  
JC72-00382A  
JC61-00581A  
JC72-00987A  
JC70-00317A  
JC61-00595A  
JC73-00017A  
JC68-30928D  
6107-001165  
6021-000222  
TBD  
PMO-BUSHING TX  
HOLDER-ACTUATOR  
PMO-ACTUATOR_EXIT  
IPR-FRAME_FUSER  
GUIDE-INPUT  
RMO-RUBBER_EXIT  
LABEL(P)-CAUTION, HOT_FUSER  
SPRING ETC-ACT_EXIT  
NUT-HEXAGON  
NEW-CLAW ASSY  
PLATE-CLAW  
JC61-00605A  
O: Service available X: Service not available  
Service Manual  
5-9  
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EXPLODED VIEWS AND PARTS LIST  
5.5 Cassette Unit Exploded view  
0
12  
14  
13  
4
17  
3
16  
18  
5
6
7
2
5
8
10  
9
11  
1
15  
Service Manual  
5-10  
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EXPLODED VIEWS AND PARTS LIST  
< Cassette Unit Parts List >  
SA. : Service Available  
NO  
DESCRIPTION  
SEC CODE  
JC97-01750A  
JC61-00578A  
JC72-00970A  
JC72-00971A  
JC61-00603A  
6107-001166  
JC61-00580A  
JC61-70911A  
JC66-00529A  
6107-001047  
JC72-00972A  
JG61-70531A  
JC70-00300A  
JC70-00301A  
JG66-40003A  
JC64-00040A  
JC73-00140A  
JC70-00314A  
JC73-00141A  
Q’TY  
SA  
O
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
REMARK  
0
CASSETTE  
1
1
1
1
1
2
1
1
2
2
1
1
1
1
1
1
1
1
3
1
FRAME-CASSETTE  
PMO-EXTENSION LARGE  
PMO-EXTENSION SMALL  
PLATE-KNOCK_UP  
SPRING-KNOCK_UP  
HOLDER-PAD  
2
3
4
5
6
7
SPRING-FRICTION PAD  
ROLLER-IDLE FEED  
SPRING-FEED  
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
PMO-PLATE_LOCKER  
SPRING-LOCKER  
ADJUST-CASSETTE_L  
ADJUST-CASSETTE_R  
GEAR-PINION  
INDICATOR-LEVER INDICATOR  
RPR-FRICTION PAD  
IPR-PLATE PAD  
RPR-PAD CASSETTE  
O: Service available X: Service not available  
Service Manual  
5-11  
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BLOCK DIAGRAM  
6. Block Diagram  
6.1 Phaser 3130  
6
Service Manual  
6-1  
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BLOCK DIAGRAM  
6.2 Phaser 3120  
Service Manual  
6-2  
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CONNECTION DIAGRAM  
7. Connection Diagram  
7.1 Phaser 3130  
7
LSUCLK  
1
2
3
4
5
6
7
8
1
2
3
4
5
1
2
3
4
5
POLYGON  
MOTOR  
nLREADY  
IEEE1284  
COMOPATIABLE  
CABLE  
nPMOTOR  
GND  
24VS  
38 PIN  
CN5  
*HSYNC  
5V  
37  
38  
CN9  
LSU  
GND  
LD  
nLD_ON  
VDO  
GND  
9
1 0  
1 1  
DIODE  
6
6 PIN  
HOST  
COMPUTER  
+3.3V  
PTL  
1
2
1
2
USB CABLE  
CN11  
PTL LED ARRAY  
CONNECTOR CN14  
for USB  
+24V  
MP_CLUTCH  
1
2
1
2
5
6
CN12  
CN6  
Manual Clutch  
Main Clutch  
+24V  
MAIN_CLUTCH  
1
2
1
2
PCL MAIN BOARD  
FR-4, 4LAYER  
P_EMPTY  
P_FEED  
1
2
1
4
3
6
5
8
7
10  
9
12  
11  
14  
13  
16  
15  
18  
17  
20  
19  
22  
21  
24  
23  
26  
25  
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
3.3V  
3.3V  
3.3V GND  
THER 1  
THER 2  
3.3V GND  
1
2
SMPS  
1
2
THERMISTOR  
CN8  
5V  
3.3V GND  
3.3V GND  
3.3V GND  
24VS  
A
1
1
2
3
B
A/  
B/  
24VS  
MP_EMPTY  
2
3
4
MOTOR  
CN10  
CN13  
24VS  
4
LED_READY  
THV_READ  
LED_ERROR  
THV_PWM  
THV_EN  
FAN  
PANEL  
BIAS_PWM  
HVPS  
MHV_PWM  
LED_TONER SAVE  
KEY_DEMO  
+3.3V  
23  
24  
25  
1
1
2
3
FAN  
FUSER  
P_EXIT  
DCU_DATA  
DCU_CLK  
GND  
2
3
4
DCU  
CN3  
26  
4
CN5  
Service Manual  
7-1  
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CONNECTION DIAGRAM  
7.2 Phaser 3120  
LSUCLK  
1
2
3
4
5
1
2
3
4
5
6
7
8
POLYGON  
MOTOR  
nLREADY  
nPMOTOR  
GND  
24VS  
HOST  
COMPUTER  
4PIN  
CONN-ECTOR  
USB CABLE  
for  
USB  
*HSYNC  
5V  
LSU  
1
2
3
4
5
CN6  
CN8  
GND  
nLD_ON  
VDO  
GND  
LD  
CN3  
9
1 0  
1 1  
DIODE  
6
+3.3V  
PTL  
1
2
1
2
PTL LED ARRAY  
+24V  
MP_CLUTCH  
1
2
1
2
CN9  
CN3  
Manual Clutch  
Main Clutch  
THE RM  
1
2
1
+24V  
MAIN_CLUTCH  
THE RM2  
THERMISTOR  
CN5  
2
1
2
1
2
A
1
2
1
A/  
B
SPL  
MAIN  
BOARD  
FR-4, 2Layer  
2
3
4
MOTOR  
P_EMPTY  
P_FEED  
3.3V  
3.3V  
3.3V GND  
CN7  
3
1
2
1
4
B/  
4
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
3
6
5
3.3V GND  
SMPS  
5V  
8
7
10  
3.3V GND  
3.3V GND  
3.3V GND  
24VS  
9
12  
11  
14  
13  
16  
24VS  
MP_EMPTY  
CN10  
CN5  
24VS  
LED_READY  
THV_READ  
LED_ERROR  
THV_PWM  
THV_EN  
15  
18  
17  
20  
19  
22  
FAN  
+3.3V  
1
1
2
3
D CU _D ATA  
2
3
4
_
CN2  
D CU C LK  
DCU  
PANEL  
BIAS_PWM  
GND  
HVPS  
4
MHV_PWM  
LED_TONER SAVE  
KEY_DEMO  
21  
24  
23  
26  
25  
23  
24  
25  
FAN  
FUSER  
P_EXIT  
26  
Service Manual  
7-2  
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SCHEMATIC DIAGRAMS  
8. Schematic Diagrams  
8.1 Phaser 3130 Main Circuit Diagram (1/9)  
8
Service Manual  
8-1  
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SCHEMATIC DIAGRAMS  
Phaser 3130 Main Circuit Diagram (2/9)  
Service Manual  
8-2  
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SCHEMATIC DIAGRAMS  
Phaser 3130 Main Circuit Diagram (3/9)  
Service Manual  
8-3  
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SCHEMATIC DIAGRAMS  
Phaser 3130 Main Circuit Diagram (4/9)  
Service Manual  
8-4  
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SCHEMATIC DIAGRAMS  
Phaser 3130 Main Circuit Diagram (5/9)  
Service Manual  
8-5  
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SCHEMATIC DIAGRAMS  
Phaser 3130 Main Circuit Diagram (6/9)  
Service Manual  
8-6  
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SCHEMATIC DIAGRAMS  
Phaser 3130 Main Circuit Diagram (7/9)  
Service Manual  
8-7  
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SCHEMATIC DIAGRAMS  
Phaser 3130 Main Circuit Diagram (8/9)  
Service Manual  
8-8  
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SCHEMATIC DIAGRAMS  
Phaser 3130 Main Circuit Diagram (9/9)  
Service Manual  
8-9  
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SCHEMATIC DIAGRAMS  
8.2 Phaser 3120 Main Circuit Diagram (1/5)  
Service Manual  
8-10  
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SCHEMATIC DIAGRAMS  
Phaser 3120 Main Circuit Diagram (2/5)  
Service Manual  
8-11  
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SCHEMATIC DIAGRAMS  
Phaser 3120 Main Circuit Diagram (3/5)  
Service Manual  
8-12  
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SCHEMATIC DIAGRAMS  
Phaser 3120 Main Circuit Diagram (4/5)  
Service Manual  
8-13  
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SCHEMATIC DIAGRAMS  
Phaser 3120 Main Circuit Diagram (5/5)  
Service Manual  
8-14  
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SCHEMATIC DIAGRAMS  
8.3 HVPS Circuit Diagram (1/2)  
24VS  
5V  
5V  
C207  
103  
R202  
100  
R209  
100K  
C204  
103  
D201  
Q201  
A708-Y  
1N4148  
C206  
104  
CON2-16  
IT201  
R210  
5.6K  
C210  
6KV 221  
THV-PWM  
R201  
430  
4
THV-sen  
5
6
C211  
+
-
R208  
10K  
2 ¡  
7
Q202  
6
C945C-Y  
6KV 221  
U102-B  
KA324  
D204  
6KV  
D205  
D206  
6KV  
R204  
R205  
22K  
5
¡ 7  
47K  
D203  
D1NL20U  
1 ¡  
6KV  
THV  
50K  
THV  
R212  
Q203  
C2383  
6KV 221  
IT-01  
C201  
473  
C209  
C202  
102  
C203  
681  
R203  
C208  
681  
1/2W 100K  
2K  
R206  
180K-F  
R207  
C205  
330K-F  
ZD201  
2.7V  
D202  
473  
R211  
1/4W 4.7  
D1NL20U  
TNR201  
5N221K  
C212  
2KV 221  
TNR202  
5N431K  
R213  
MGR1/2W 100MF  
24VS  
TNR203  
5N431K  
5V  
C302  
103  
R302  
470K  
IT301  
C301  
104  
D302  
4KV  
R303  
470  
R309  
N.U  
4
2
C304  
R305  
¡
MGR1/2W 50M  
6
3KV 151  
R301  
1K  
5
¡ 7  
CON2-17  
THV-EA  
THV-sen  
Q301  
1 ¡  
IT-01  
C945C-Y  
D303  
1N4148  
R306  
150KF  
C303  
103  
Q302  
C2383  
473  
C306  
ZD301  
2.7V  
D301  
D1NL20U  
R304  
1/4W 4.7  
C305  
104  
D304  
1N4148  
R307  
150K  
INDEX  
50K  
5V  
D305  
1N4148  
R308  
1K  
3
2
+
-
CON2-18  
1
THV-READ  
U102-A  
KA324  
C307  
473  
Service Manual  
8-15  
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SCHEMATIC DIAGRAMS  
HVPS Circuit Diagram (2/2)  
5V  
24VS  
ZD401  
2.7V  
C404  
472  
R403  
1.5M  
D401  
1N4148  
C406  
103  
R407  
100K  
R406  
5.6K  
D404  
4KV  
Q401  
A708-Y  
MHV-sen  
R410  
1/2W 560K  
IT401  
MHV  
R413  
12  
13  
+
-
14  
4
R408  
470  
MHV-PWM  
1/2W 100K  
C405  
104  
R404  
10K  
2 ¡  
C409  
3KV 471  
U102-D  
KA324  
CON2-19 R401  
47K  
R402  
22K  
6
R411  
MGR1/2W 20MF  
C403  
331  
R414  
MGR1/2W 15MF  
5
¡ 7  
C401  
C402  
102  
D402  
1N4148  
R405  
10K  
473  
1 ¡  
MHV-sen  
IT-01  
C407  
103  
OPC  
Q403  
R412  
30KF  
5V  
C2316  
D403  
D1NL20U  
Q402  
C945C-Y  
ZD402  
2.7V  
C410  
221  
ZD403  
130V  
C408  
103  
R409  
1/4W 4.7  
MHV  
20K  
5V  
24VS  
ZD501  
2.7V  
C504  
472  
10  
R503  
D501  
1N4148  
C506  
103  
330KF  
R507  
R506  
5.6K  
100K  
Q501  
A708-Y  
D504  
4KV  
BIAS-sen  
IT501  
R510  
SUPPLY  
1/2W 1.8M  
R513  
+
-
4
8
BIAS-PWM  
CON2-20  
R508  
470  
1/2W 50K  
R502  
9
C505  
104  
R511  
R504  
10K  
2 ¡  
C510  
R501  
47K  
22K  
U102-C  
KA324  
6
C509  
3KV 471  
3KV 101  
ZD503  
200V  
7
5
¡
C501  
473  
C502  
102  
D502  
C503  
R505  
10K  
1 ¡  
1N4148 681  
BIAS-sen  
IT-01  
C507  
103  
DEV  
R514  
Q503  
C2316  
5V  
R512  
30KF  
1/2W 50K  
Q502  
C945C-Y  
D503  
D1NL20U  
R515  
MGR1/2W 15MF  
C508  
103  
R509  
1/4W 10  
ZD502  
2.7V  
DEV  
20K  
U103  
KA7805  
24VS  
5V  
IN  
OUT  
+
+
C113  
25V 47uF  
C112  
50V 10uF  
Service Manual  
8-16  
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SCHEMATIC DIAGRAMS  
8.4 SMPS Circuit Diagram  
AR1  
DSS-401M  
SW1  
F1  
F2  
250V 2A  
PT1  
EER2828  
SW SPST  
250V 5A  
LF1  
LF2  
2003  
1007  
D1,2,3,4  
600V2A*4  
R5  
2W  
100K  
R101  
22  
C101  
1KV 102  
C2  
222MAD  
INLET1  
-
+
CON2-7,8,9  
+24V2.0A  
R2  
R3  
6
TNR1  
C4  
C1  
224  
SW2  
10D561K  
104  
C6  
C5  
SS-5GL2  
C3  
1KV 103  
400V  
D101,102  
200V 3A*2  
222MAD  
1
R1  
3
10  
9
100uF  
2
CON2-13,14  
1/2W  
560K  
C104  
C103  
35V NU  
47uF  
TH1  
SCK-054  
+24VS  
C102  
D5  
35V  
C105  
50V 33uF  
UF4007  
1000uF  
DSS-401M  
AR2  
1
R4  
CON2-10,11,12  
GND  
BD1  
L1  
300uH  
NU  
R11  
C10  
1W 47  
R108  
630V  
333  
C106  
1KV 102  
CON1  
L101  
10uH  
U2  
FUSIBLE  
22  
PWM CONTROL  
2
F101  
4
1
Vin  
Drain  
U1  
BTA12-600B  
1
CON2-1,2,3  
+3.3V1.0A  
STR-G6353  
R6  
D6  
D1NL20U  
R110  
30  
Source  
2
OCP/FB  
GND  
3
220  
C11  
50V  
104  
D103,104  
40V 3A*2  
R12  
R13  
1/4W 22  
5
R109  
NU  
PC101-A  
R111 R113  
NU  
1.8K-F  
1W 180  
817M-B  
PC101-B  
817M-B  
3
4
8
FUSIBLE  
C108  
50V1uF  
C9  
NU  
C110  
NU  
PC102  
TLP3061S  
C107  
10V  
1000uF  
R8  
C109  
10V  
470uF  
C7  
50V  
33uF  
680  
11  
R7  
6.8K  
1
R112  
5.6K-F  
U101  
TL431  
R9  
R114  
1/2W  
C8  
471  
1W0.6  
CON2-4,5,6  
DGND  
1.5K  
C12  
332MAD  
CON2-15(MANUAL)  
CON2-16(THV-PWM)  
CON2-17(THV-EA)  
CON2-18(THV-READ)  
CON2-19(MHV-PWM)  
CON2-20(BIAS-PWM)  
CON2-21(LED-ERROR)  
CON2-22(LED-DATA)  
CON2-23(KEY-DEMO)  
CON2-24(FAN)  
CON2-14,16(+24VS)  
CON2-25(*FUSER-ON)  
CON2-25(FUSER-ON)  
CON2-26(EXIT)  
NO MARKING RESISTOR 1/8W-J(5%)  
Service Manual  
8-17  
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SCHEMATIC DIAGRAMS  
8.5 OTHER PBA Circuit Diagrams  
3.3V  
24VS  
CON3  
3
R115 R116  
R117 R118  
D105  
1N4003  
2
1
35301-0350  
R119  
2.2K  
CON2-15(MANUAL)  
CON2-26(EXIT)  
CON2-24(FAN)  
Q101  
KSC1008-Y  
1
2
3
4
1
2
3
R120  
5.6K  
OP101  
ITR-8406S  
OP102  
ITR-8406S  
4
3.3V  
35303-0550  
C111  
104  
1
2
3
4
5
CON2-21(LED-ERROR)  
CON2-22(LED-DATA)  
CON2-23(KEY-DEMO)  
CON4  
Service Manual  
8-18  
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