Samsung All In One Printer Scx 4100 User Manual
DIGITAL LASER MFP  
SCX-4100  
Manual  
SERVICE  
DIGITAL LASER MFP  
CONTENTS  
1. Precautions  
2. Reference Information  
3. Specifications  
4. Summary of product  
5. Disassembly and Reassembly  
6. Alignment and Adjustments  
7. Troubleshooting  
8. Exploded Views and Parts List  
9. Block Diagram  
10. Connection Diagram  
Precautions  
1. Precautions  
In order to prevent accidents and to prevent damage to the equipment please read the precautions listed  
below carefully before servicing the printer and follow them closely.  
1
1.1 Safety Warning  
(1) Only to be serviced by appropriately qualified service engineers.  
High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably  
trained and qualified service engineer.  
(2) Use only Samsung replacement parts  
There are no user serviceable parts inside the printer. Do not make any unauthorized changes or  
additions to the printer, these could cause the printer to malfunction and create electric shock or fire haz-ards.  
(3) Laser Safety Statement  
The Printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J for  
Class 1(1) laser products, and elsewhere, it is certified as a Class I laser product  
con-forming to the requirements of IEC 825. Class I laser products are not considered to be hazardous. The  
laser system and printer are designed so there is never any human access to laser radiation above a Class I  
level during normal operation, user maintenance, or prescribed service condition.  
Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. The  
reflected beam, although invisible, can damage your eyes. When using this product, these basic safety  
pre-cautions should always be followed to reduce risk of fire, electric shock, and injury to persons.  
CAUTION - INVISIBLE LASER RADIATION  
WHEN THIS COVER OPEN.  
DO NOT OPEN THIS COVER.  
VORSICHT - UNSICHTBARE LASERSTRAHLUNG,  
WENN ABDECKUNG GE FFNET.  
NICHT DEM STRAHL AUSSETZEN.  
ATTENTION - RAYONNEMENT LASER INVISIBLE EN CAS  
D OUVERTURE. EXPOSITION DANGEREUSE  
AU FAISCEAU.  
ATTENZIONE - RADIAZIONE LASER INVISIBILE IN CASO DI  
APERTURA. EVITARE L ESPOSIZIONE AL  
FASCIO.  
PRECAUCION - RADIACION LASER IVISIBLE CUANDO SE ABRE.  
EVITAR EXPONERSE AL RAYO.  
ADVARSEL. - USYNLIG LASERSTR LNING VED BNING, N R  
SIKKERHEDSBRYDERE ER UDE AF FUNKTION.  
UNDG UDSAETTELSE FOR STR LNING.  
ADVARSEL. - USYNLIG LASERSTR LNING N R DEKSEL  
PNES. STIRR IKKE INN I STR LEN.  
UNNG EKSPONERING FOR STR LEN.  
VARNING - OSYNLIG LASERSTR LNING N R DENNA DEL  
R PPNAD OCH SP RREN R URKOPPLAD.  
BETRAKTA EJ STR LEN. STR LEN R FARLIG.  
VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA  
OLET ALTTIINA N KYM TT M LLE LASER-  
S TEILYLLE L KATSO S TEESEEN.  
Service Manual  
1-1  
Precautions  
1.2 Caution for safety  
1.2.1 Toxic material  
This product contains toxic materials that could cause illness if ingested.  
(1) If the LCD control panel is damaged it is possible for the liquid inside to leak. This liquid is toxic. Contact with the skin  
should be avoided, wash any splashes from eyes or skin immediately and contact your doctor. If the liquid gets into  
the mouth or is swallowed see a doctor immediately.  
(2) Please keep toner cartridges away from children. The toner powder contained in the toner cartridge may be harmful  
and if swallowed you should contact a doctor.  
1.2.2 Electric Shock and Fire Safety Precautions  
Failure to follow the following instructions could cause electric shock or potentially cause a fire.  
(1) Use only the correct voltage, failure to do so could damage the printer and potentially cause a fire cause an  
electric shock.  
(2) Use only the power cable supplied with the printer. Use of an incorrectly specified cable could cause the cable  
to overheat and potentially cause a fire.  
(3) Do not overload the power socket, this could lead to overheating of the cables inside the wall and could lead to  
a fire.  
(4) Do not allow water or other liquids to spill into the printer, this can cause electric shock. Do not allow paper  
clips, pins or other foreign objects to fall into the printer these could cause a short circuit leading to an electric  
shock or fire hazard..  
(5) Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock. When  
servicing the printer remove the power plug from the wall socket.  
(6) Use caution when inserting or taking off the power plug. The power plug has to be inserted completely. If not,  
a fire will be caused due to poor contact. When taking off the power plug, grip the plug and remove it.  
(7) Take care of the power cable. Do not allow it to become twisted, bent sharply round corners or other wise  
damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat and  
cause a fire or exposed cables could cause an electric shock. Replace a damaged power cable immediately,  
do not reuse or repair the damaged cable. Some chemicals can attack the coating on the power cable,  
weakening the cover or exposing cables causing fire and shock risks.  
(8) Ensure that the power sockets and plugs are not cracked or broken in any way. Any such defects should be  
repaired immediately. Take care not to cut or damage the power cable or plugs when moving the machine.  
(9) Use caution during thunder or lightening storms. Samsung recommend that this machine be disconnected from  
the power source when such weather conditions are expected. Do not touch the machine or the power cord if it  
is still connected to the wall socket in these weather conditions.  
(10) Avoid damp or dusty areas, install the printer in a clean well ventilated location. Do not position the machine  
near a humidifier. Damp and dust build up inside the machine can lead to overheating and cause a fire.  
(11) Do not position the printer in direct sunlight. This will cause the temperature inside the printer to rise possibly  
leading to the printer failing to work properly and in extreme conditions could lead to a fire.  
(12) Do not insert any metal objects into the machine through the ventilator fan or other part of the casing, it could  
make contact with a high voltage conductor inside the machine and cause an electric shock.  
Service Manual  
1-2  
Precautions  
1.2.3 Handling Precautions  
The following instructions are for your own personal safety, to avoid injury and so as not to damage the printer  
(1) Ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause  
the printer to tip or fall.  
(2) printer contains many rollers, gears and fans. Take great care to ensure that you do not catch your fingers, hair  
or clothing in any of these rotating devices.  
(3) Do not place any small metal objects, containers of water, chemicals or other liquids close to the printer which if  
spilled could get into the machine and cause damage or a shock or fire hazard.  
(4) Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a  
humidifier or heater. Damage could be cause to the printer in such areas.  
(5) Do not place candles, burning cigarettes, etc on the printer, These could cause a fire.  
1.2.4 Assembly / Disassembly Precautions  
Replace parts carefully, always use Samsung parts. Take care to note the exact location of parts and also  
cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly.  
Please carry out the following procedures before dismantling the printer or replacing any parts.  
(1) Check the contents of the machine memory and make a note of any user settings. These will be erased if the  
mainboard or network card is replaced.  
(2) Ensure that power is disconnected before servicing or replacing any electrical parts.  
(3) Disconnect printer interface cables and power cables.  
(4) Only use approved spare parts. Ensure that part number, product name, any voltage, current or temperature  
rating are correct.  
(5) When removing or re-fitting any parts do not use excessive force, especially when fitting screws into plastic.  
(6) Take care not to drop any small parts into the machine.  
(7) Handling of the Toner Cartridge  
- The OPC Drum can be irreparably damaged if it exposed to light.  
Take care not to expose the OPC Drum either to direct sunlight or to fluorescent or incandescent room  
lighting. Exposure for as little as 5 mins can damage the surface’s photoconductive properties and will result  
in print quality degradation. Take extra care when servicing the printer. Remove the OPC Drum and store it in  
a black bag or other lightproof container. Take care when working with the covers(especially the top cover)  
open as light is admitted to the OPC area and can damage the OPC Drum.  
- Take care not to scratch the green surface of OPC Drum Unit.  
If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised.  
Service Manual  
1-3  
Precautions  
1.2.5 Disregarding this warning may cause bodily injury  
(1) Be careful with the high temperature part.  
The fuser unit works at a high temperature. Use caution when working on the printer. Wait for the fuser to cool  
down before disassembly.  
(2) Do not put finger or hair into the rotating parts.  
Take care when using a printer. It contains many rotating parts. Ensure that fingers, hair, clothing etc. do not  
become caught in the mechanism as this could cause injury.  
(3) When you move the printer.  
This printer weighs 8.8kg including toner cartridge and cassette. Use safe lifting and handling techniques. Use  
the lifting handles located on each side of the machine. Back injury could be caused if you do not lift carefully.  
(4) Ensure the printer is installed safely.  
The printer weighs 8.8Kg, ensure the printer is installed on a level surface, capable of supporting its weight.  
Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer.  
(5) Do not install the printer on a sloping or unstable surface. After installation, double check that the printer is  
stable.  
Service Manual  
1-4  
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 commercially avail-  
able wrist strap device, which should be removed for your personal safety reasons prior to applying 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 assem-  
bly.  
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 dam-  
age 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 compa-  
rable conductive material.  
7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the pro-  
tective 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 com-  
pletely 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 electricity sufficient to  
damage an ESD.  
Service Manual  
1-5  
Reference Information  
2. Reference Information  
This chapter contains the tools list, list of abbreviations used in this manual, and a guide to the  
location space required when installing the printer. A definition of tests pages is also included.  
2
2.1 Tool for Troubleshooting  
The following tools are recommended for safe and smooth troubleshooting described in this service manual.  
DVM(Digital Volt Meter)  
Cleaning Equipments  
Standard : An IPA(Isopropyl Alcohol)dry  
wipe tissue or a gentle neutral  
detergent and lint-free cloth.  
Standard: Indicates more than 3 digits.  
1
5
Vacuum Cleaner  
6
Driver  
Standard : "-" type, "+" type (M3 long, M3  
short, M2 long, M2 short).  
2
Spring Hook  
Standard : For general use  
7
8
Tweezers  
Standard : For general home use, small  
type.  
3
4
Software(Driver) installation CD ROM  
Cotton Swab  
Standard : For general home use, for  
medical service.  
Service Manual  
2-1  
Samsung Electronics  
Reference Information  
2.2 Acronyms and Abbreviations  
The table in the below explains abbreviations used in this service manual.  
The contents of this service manual are declared with abbreviations in many parts. Please refer to the  
table.  
ADC  
Analog-to-Digital-Conversion  
Access Point  
FCOT  
FFC  
First Copy Out Time  
FLexiable FLat Cable  
local area network  
Laser Beam Printer  
Enhanced Parallel Port  
Firmware  
AP  
AC  
Alternating Current  
LAN  
ASIC  
ASSY  
BIOS  
BLDC Motor  
CIS  
Application Specific Integrated Circuit  
Assembly  
LBP  
EPP  
Basic Input Output System  
Brushless DC Motor  
Contact Image Sensor  
F/W  
FCF/FCT  
First Cassette Feeder/First  
Cassette Tray  
FISO  
FPOT  
GDI  
GIF  
Front-In, Side-Out  
First Print out Time  
Windows Graphic Device Interface  
Graphic Interchange Format  
Ground  
CMOS  
Complementary Metal Oxide  
Semiconductor  
CN  
Connector  
CON  
CPU  
dB  
Connector  
Central Processing Unit  
Decibel  
GND  
HBP  
HDD  
HTML  
HV  
Host Based Printing  
Hard Disk Drive  
dBA  
A-Weighted decibel  
Decibel milliwatt  
dBm  
DC  
Hyper Text Transfer Protocol  
High Voltage  
Direct Current  
DCU  
DIMM  
DPI  
Diagnostic Control Unit  
Dual In-line Memory Module  
Dot Per Inch  
HVPS  
I/F  
High Voltage Power Supply  
Interface  
I/O  
Input and Output  
DRAM  
DVM  
ECP  
ECU  
EEPROM  
Dynamic Random Access Memory  
Digital Voltmeter  
lb  
Pound(s)  
IC  
Integrated Circuit  
Enhanced Capability Port  
Engine Control Unit  
ICC  
IDE  
International Color Consortium  
Intelligent Drive Electronics or  
Integrated Drive Electronics  
Electronically Erasable  
Programmable Read Only Memory  
IEEE  
IOT  
IPA  
Institute of Electrical and  
Electronics Engineers. Inc  
EMI  
EP  
Electro Magnetic Interference  
Electro photographic  
Image Output Terminal (Color print-  
er, Copier)  
EPP  
Enhanced Parallel Port  
Isopropy Alcohol  
Service Manual  
2-2  
Samsung Electronics  
Reference Information  
IPC  
Inter Process Communication  
Images Per Minute  
Liquid Crystal Display  
Light Emitting Diode  
Laser Scanning Unit  
Megabyte  
RAM  
Random Access Memory  
IPM  
ROM  
Read Only Memory  
LCD  
SCF/SCT  
Second Cassette Feeder/Second  
Cassette Tray  
LED  
SMPS  
SPGP  
Switching Mode Power Supply  
LSU  
Samsung Printer Graphic  
Processor  
MB  
MFP  
MHz  
MPBF  
MPF/MPT  
Multi-Functional Product  
Megahertz  
SPL  
Samsung Printer Language  
Spool  
Simultaneous Peripheral Operation  
Online  
Mean Prints Between Failure  
SURF  
SW  
Surface Rapid Fusing  
Switch  
Multi Purpose Feeder/Multi  
Purpose Tray  
NIC  
Network Interface Card  
Network Printer Card  
sync  
T1  
Synchronous or Synchronization  
ITB  
NPC  
NVRAM  
Nonvolatile Random Access  
Memory  
T2  
Transfer Roller  
TBD  
TRC  
TTM  
PnP  
UMC  
URL  
USB  
VCCI  
To Be Determined  
Toner Reproduction Curve  
Time to Market  
OPC  
PBA  
PCL  
Organic Photo Conductor  
Printed Board Assembly  
Printer Command Language ,  
Printer Control Language  
Universal Plug and Play  
Unit Manufacturing Cost  
Uniform Resource Locator  
Universal Serial Bus  
PCI  
Peripheral Component  
Interconnect by Intel 1992/6/22, is  
a local bus standard developed by  
Intel and introduced in April, 1993 :  
A60, B60 Pins  
Voluntary Control Council for  
Interference Information  
Technology Equipment  
PDF  
PDL  
Ping  
Portable Document Format  
Page Description Language  
WECAAlliance Wireless Ethernet Compatibility  
Wi-Fi Wireless Fidelity  
Packet internet or Inter-Network  
Groper  
PPD  
PPM  
PS  
Postscript Printer Discription  
Page Per Minute  
Post Script  
PTL  
PWM  
Q’ty  
Pre-Transfer Lamp  
Pulse Width Moduration  
Quantity  
QCD  
Quality, Cost, and Delivery  
Service Manual  
2-3  
Samsung Electronics  
Reference Information  
2.3 Select a location for the printer  
• Leave enough room to open the printer trays, covers, and allow for proper ventilation. (see diagram  
below)  
• Provide the proper environment :  
- A firm, level surface  
- Away from the direct airflow of air conditioners, heaters, or ventilators  
- Free of extreme fluctuations of temperature, sunlight, or humidity  
- Clean, dry, and free of dust  
Service Manual  
2-4  
Samsung Electronics  
Reference Information  
2.4 The Sample Pattern for the Test  
The sample pattern shown in below is the standard pattern used in a factory.  
The contents of the life span and the printing speed are measured with the pattern shown in below.  
(The picture in the manual is 70% size of the actual A4 size.)  
2.4.1 A4 5% Pattern  
Service Manual  
2-5  
Samsung Electronics  
Reference Information  
2.4.2 A4 2% Pattern  
Service Manual  
2-6  
Samsung Electronics  
Reference Information  
2.4.3 A4 IDC 5% Patten  
Service Manual  
2-7  
Samsung Electronics  
Reference Information  
MEMO  
Service Manual  
2-8  
Samsung Electronics  
Specifications  
3. Specifications  
Specfications are correct at the time of printing. Product specifications are subject to change without notice.  
See below for product specifications.  
3
3.1 General Specifications  
Items  
SCX-4100  
Copier,Print,Scan  
Remarks  
General  
Major Features  
Size (W*D*H)  
16.6"x15.8" x9.4"  
(422x400x239mm)  
0.69 Kg  
Net Weight(Inc. Toner Cartridge)  
Net Weight(exc. Toner Cartridge)  
Gross Weight(with package)  
LCD  
8.89 Kg  
12.04 Kg  
16*2 Char  
No BackLite  
I/O Interface  
USB1.1 & IEEE1284  
300 Wh  
Power  
Printing Operation  
Sleep Mode  
Consumption  
Energy Star Compliant  
Yes  
Power Switch  
Noise  
Operating  
49 dBA  
Standby  
38 dBA  
Warm Up Time  
Machine Life  
from Cold Status  
Less than 42 seconds  
10,000pages  
2,000pages  
500 Pages  
Max. Monthly Volume  
(Duty Cycle)  
Print  
Scan  
Average Monthly Print Volume  
Machine Life  
5 years, 100000 Pages  
Whichever comes first.  
Approval  
Class B  
8MB  
N/A  
Device Memory  
Internal N/W Option  
Page Counter  
Yes  
Print Configuration  
Sheet  
Yes  
Service Manual  
3-1  
Samsung Electronics  
Specifications  
3.2 Print Specification  
Items  
SCX-4100  
Remarks  
PRINT  
Print Speed  
Print Method  
Print Language  
Power Save  
Resolution  
15ppm/Ltr, 14ppm/A4  
Laser  
SPL  
Yes(5/10/15/30/45min.)  
Normal  
RET  
600 x 600 dpi  
No  
Toner Save  
Yes  
LCD Only (Toner  
Save On/Off  
Setting method  
is in the Menu).  
Memory  
FPOT  
8MB  
From Stand by  
Approx. 12 seconds  
From Cold Status Less than 54 seconds  
Duplex Print  
N.A  
Printable Area  
208 x 273 mm (Letter)  
256 levels  
Halftone(Gray Scale)  
3.3 Scan Specification  
Items  
SCX-4100  
Remarks  
SCAN  
Scan Method  
Scan Speed through  
Platen  
Color CIS  
Lineart, Halftone  
72 sec  
Gray  
72 sec  
Color  
40sec/150 sec  
75dpi/300dpi  
Resolution  
Optical  
600*600dpi  
Enhanced  
4800dpi*4800dpi (USB)  
2400dpi*2400dpi(Parallel)  
Halftone  
256level  
Scan Size  
Max. Document  
Width  
Max.216mm(8.5")  
Effiective Scan  
Width  
Max 208mm(8.2inch)  
Scan-to  
E-mail, Image, OCR, WEB  
Through PC  
"through PC -->  
means "from  
SmarThru4  
application".  
Scan Depth  
Color  
Mono  
24 bit  
1bit for Lineart, Halftone,  
8 Bit for Gray scale  
Service Manual  
3-2  
Samsung Electronics  
Specifications  
3.4 Copy Specification  
Items  
SCX-4100  
600x300dpi  
Remarks  
COPY  
Copy Quality Selection or  
Text  
Original Image type  
selection Mode  
FCOT  
Text/Photo  
Photo  
600x300dpi  
600x600dpi for Platen  
Approx. 12 seconds  
Stand by  
From Cold Status Less than 54 seconds  
SDMC at all mode 15cpm/Ltr. 14cpm/A4  
Copy Speed / Letter  
Resolution  
SDMC: Single  
Document  
Multiple Copy  
Scan:600*600dpi  
Print:600*600dpi  
Zoom Range  
50% to 200%  
Multi Copy  
1~99  
Preset  
Yes  
Darkness Control  
Copy Mode(=Original Type)  
Collation Copy  
3 level  
Light, Normal, Dark  
Text, Text/Photo, Photo  
N/A  
Auto return to default mode  
Yes(after 1 minute)  
Time can be  
changeable;  
15,30,60,180sec, Off  
Changeable Default mode  
Special Copy  
Darkness, Original Type,  
Reduce/Enlarge, No. of Copies,  
2-up copy  
Yes(Platen only)  
N/A  
Collation Copy  
AutoFit Copy  
2 Sides in 1 pg  
Yes(Platen only)  
Yes(Platen only)  
* Copy 2-side printed  
original document  
into one page(ex. ID  
Card Copy)  
Clone  
Poster  
Yes(Platen only)  
Yes(Platen only)  
Service Manual  
3-3  
Samsung Electronics  
Specifications  
3.5 Paper Handiling Specification  
Items  
SCX-4100  
250sheets  
Remarks  
Paper Handling  
Capacity( 20lbs)  
Main Tray  
Bypass(MP Tray) Single Sheet  
No  
Optional Cassette  
Output Capacity  
Face Down: 50Sheets/20lb  
Face Up: 1Sheet  
Output Control  
Paper Size  
Face down/Face up  
Main Tray  
Bypass  
Legal,A4,Letter, Folio,  
Executive, B5, A5, A6  
Bypass:Envelope6 3/4, 7  
3/4,#9, #10,DL,C5,B5  
With main tray paper  
Paper Weight  
Paper Path  
Paper Size  
Main Tray  
16~24 lb.  
Bypass  
16~43 lb.  
Standard output  
Bottom to Top Front (FIFO)  
Straight Through Face up, Single Sheet  
Max  
Min  
216 x 356mm(8.5"x14")  
76 x 127mm(3"x5")  
No  
Compatibility  
DOS  
Service Manual  
3-4  
Samsung Electronics  
Specifications  
3.6 Other Specification  
Items  
SCX-4100  
Remarks  
Software  
WHQL  
Win 3.x  
No  
Win 95  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Win 98&WinME  
Win NT 4.0  
Win 2000  
Win XP  
Mac  
Mac Printer Only  
Print, Scan  
Linux  
Printer  
Printer driver only  
for WinXP  
WIA  
Scanner  
Printer  
TWAIN  
WIA  
No  
Driver  
Package  
SPL  
Yes  
No  
RCP  
Yes  
Remote Control  
Panel, Only for  
upgrade FW  
PC-FAX  
Yes  
No  
Only available  
through PC  
Offset BOx  
Yes  
Package and POP POP  
Quick Reference guide  
(include Setup Guide and  
Function Guide)  
Accessory  
Owner's manual  
S/W CD ROM  
Yes(Electronic)  
1 CD for User Manual, Smar  
Thru 4, Print Driver, Scan  
Driver, RCP  
Toner Cartridge  
Power Cable  
1 EA  
1 EA  
No  
L-shape power cable  
Telephone Jack  
Printer Cable  
No  
China,Korea : USB  
Russia : Parallel  
cable  
Type  
One Piece  
Consumables  
How to install  
Front door open and front  
loading  
Toner  
Life  
Initial 1Kpages  
running 3Kpages  
Toner Count  
Level Sensor  
No  
No  
Software Count  
Service Manual  
3-5  
Samsung Electronics  
Specifications  
MEMO  
Service Manual  
3-6  
Samsung Electronics  
Summary of product  
4. Summary of Product  
This chapter describes the functions and operating principles of the main component.  
4
4.1 Printer Components  
4.1.1 Front View  
Service Manual  
4-1  
Samsung Electronics  
Summary of Product  
4.1.2 Rear View  
Service Manual  
4-2  
Samsung Electronics  
Summary of product  
4.1.3 Control Panel  
Service Manual  
4-3  
Samsung Electronics  
Summary of Product  
4.2 System Layout  
SCAN PART  
Service Manual  
4-4  
Samsung Electronics  
Summary of product  
4.2.1 Paper Feed Mechanism  
The printer has a universal cassette which automatically loads paper and a manual feed which supplies paper  
single sheet at a time. The cassette has a friction pad which separates paper to ensure single sheet feeding, and it  
has a sensor, which checks when the paper tray is empty.  
- Feeding Method: Universal Cassette Type  
- Feeding Standard: Center Loading  
- Feeding Capacity: Cassette-250 sheets (75g/m2 , 20lb paper standard)  
Manual 1 sheet (Paper, OHP, Envelop, etc.)  
- Paper detecting sensor: Photo sensor  
- Paper size sensor: None  
4.2.2 Transfer Ass’y  
This consists of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL shines a light onto the OPC drum.  
This lowers the charge on the drum’s surface and improves transfer efficiency.  
The transfer roller transfers toner from the OPC drum surface to the paper.  
- Life expectancy: Over 60,000 sheets (at 15~30°C)  
4.2.3 Drive Ass’y  
A gear driven power unit. The motor supplies power to the paper feed unit, the fuser unit, and the toner cartridge.  
4.2.4 Fixing Part(Fuser)  
There are two types of fuser unit:  
Q-PID type, developed by Samsung, and only used on 220V Domestic models  
Heat Lamp type used on 220V Export models and all 110V models.  
The Heat Lamp type fuser consists of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor, and Thermostat. It  
fixes toner to the paper using pressure and heat to complete the printing job.  
4.2.4.1 Heat Lamp power cut-off (Thermostat)  
The thermostat is a temperature sensing device, which cuts off the power to the heat lamp to prevent overheating  
fire when the heat lamp or heat roller overheats.  
4.2.4.2 Temperature Detecting Sensor (Thermistor)  
The Thermistor detects the surface temperature of the heat roller, this information is sent to the main processor  
which uses this information to regulate the temperature of the heat roller.  
4.2.4.3 Heat Roller  
The surface of the Heat Roller is heated by the Heat Lamp. As the paper passes between the Heat and Pressure  
rollers the toner is melted and fixed permanently to the paper. The surface of the roller is coated with Teflon. This  
ensures that toner does not adhere to the roller surface.  
4.2.4.4 Pressure roller  
The Pressure Roller mounted under the heat roller, it is made of a silicon resin, and the surface of the roller is  
tubed with Teflon. This ensures that toner does not adhere to the roller surface.  
Service Manual  
4-5  
Samsung Electronics  
Summary of Product  
4.2.4.5 Safety Relevant Facts  
• To prevent overheating  
- 1st protection device: Hardware cuts off when overheated  
- 2nd protection device: Software cuts off when overheated  
- 3rd protection device: Thermostat cuts off mains power to the lamp.  
• Safety device  
- Fuser power is cut off when the front cover is opened  
- LSU power is cut off when the front cover is opened  
- The temperature of the fuser cover's surface is maintained at less than 80ºC to protect the user and a  
caution label is attached where the customer can see it easily when the rear cover is opened.  
4.2.5 Scanner Unit  
• Scan Image Controller  
1.Scan Line Time : 1.67ms  
2.Scan Resolution : Color : Max 600DPI  
3.Scan Width : 216mm  
4.Function  
- White Shading Correction  
- Gamma Correction  
- CIS Interface  
- 256 Gray Scale  
•
CIS Driver Circuit  
- CIS Clock : 4.16MHz  
- Voltage Reference : 1.1V  
- CIS Line Time : 1.67ms/Line x 3Color(600dpi)  
• Scan Motor Driver Circuit  
- Motor Driver : SIA403A  
- Used Volt : 24V DC  
Service Manual  
4-6  
Samsung Electronics  
Summary of product  
4.2.6 LSU (Laser Scanner Unit)  
This is the core of the laser printer. It converts the video data received from the computer into an electrostatic  
latent image on the surface of the OPC drum. This is achieved by controlling the laser beam and exposing the  
surface of the OPC drum to the laser light. A rotating polygon mirror reflects the laser light onto the OPC and each  
side of the mirror is one scan line. The OPC drum turns as the paper feeds to scan the image down the page.  
The /HSYNC signal is created when the laser beam from LSU reaches the end of the polygon mirror and this  
signal is sent to the controller. The controller detects the /HSYNC signal to adjust the vertical line of the image on  
paper. In other words after the /HSYNC signal is detected the image data is sent to the LSU to adjust the left margin  
on the paper.  
Service Manual  
4-7  
Samsung Electronics  
Summary of Product  
4.2.7 Toner Cartridge  
The toner cartridge is an integral unit containing the OPC unit and toner unit. The OPC unit consists of the OPC  
drum and charging roller, and the toner cartridge unit consists of the toner, supply roller, developing roller, and  
blade (Doctor blade)  
- Developing Method: Non magnetic 1 element contacting method  
- Toner: Non magnetic 1 element shatter type toner  
- The life span of toner: 3,000 sheets (IDC Pattern/A4 standard)  
- Toner remaining amount detecting sensor: No  
- OPC Cleaning: Electrostatic process  
- Management of waste toner: Electro static process(Cleanerless Type)  
- OPC Drum protecting Shutter: No  
- Classifying device for toner cartridge: ID is classified by interruption of the frame channel  
0.22mW  
-330V  
-970V  
-480V  
Service Manual  
4-8  
Samsung Electronics  
Summary of product  
4.3 Main PBA  
The Engine Board and Controller Board have been integrated into a single PBA. This consists of the CPU, printer  
scanner and line control functions. The CPU functions as the bus controller, I/O handler, motor driver and PC inter-face.  
The main board sends the Current Image Video data to the LSU and manages the Electrophotographic printing  
process. Circuits on the PBA drive include the main motor (paper feed, cartridge, fuser), clutch driver, pre-transfer  
lamp driver, heat-lamp driver, CIS driver, scan motor driver and fan driver.  
The signals from the paper feed jam sensor and paper empty sensor are inputted to the main board from  
the power supply PBA.  
Service Manual  
4-9  
Samsung Electronics  
Summary of Product  
4.3.1 ASIC (Chorus2)  
The Chorus2 (16Bit RISC Processor) ASIC is the main processor controlling the whole system. It controls  
all of the printing and scanning functions using a system program stored in flash memory.  
•Main function block  
• Completely Integrated System for Embedded Applications,  
• 16/32 Bit Risc Architecture, Efficient and Powerful ARM7TDMI CPU  
• LSU Interface Module for Interfacing PVC with LSU  
• 5 Channel General Purpose DMA Controller for High Speed I/O  
• Dual Memory Bus Architecture  
• Operating frequency : 66MHz  
• Operating power : 1.8V(internal), 3.3V(external)  
4.3.2 Flash Memory  
This stores the system program. Firmware upgrade is achieved by downloading from the new image using the PC  
Interface.  
• Capacity : 1M Byte  
• Access Time : 70 nsec  
4.3.3 SDRAM  
This is used as a buffer, system working memory area, etc. while printing and scanning.  
• Capacity :  
SCX-4100  
8 M byte  
•
Access Time : 15 nsec  
4.3.4 Sensor input circuit  
1) Paper Empty Sensing  
The Paper Empty sensor (Photo Interrupter) on the SMPS/HVPS PBA is monitored by the CPU.  
When the cassette is empty the printer displays a message on the LCD panel.  
2) MP Sensing  
Presence of paper in the MP tray is detected by operation of the MP Sensor (Photo Interrupter) on the  
SMPS/HVPS PBA. The CPU monitors this signal to recognize paper in the MP, and paper is fed from MP if  
there is paper present.  
Service Manual  
4-10  
Samsung Electronics  
Summary of product  
3) Paper Feeding, Toner Cartridge Sensing  
When paper passes the actuator on the feed sensor, it is detected by the Photo interrupter.  
Signal (nP_FEED, PIN 186) monitored by the CPU and this signal starts the process of creating the image after certain  
delay time If the feed sensor is not detected within 1 sec. after paper is fed, a paper Jam0 occurs. (Displayed on the  
LCD panel).  
When a toner cartridge is inserted it also operates the Paper Feed sensor. A message is displayed on the LCD id no  
cartridge is detected.  
4) Paper Exit Sensing  
This detects that paper exits cleanly from the set using an exit sensor on the engine board and actuator on the frame.  
The monitors signal (P_EXIT, PIN 84) and detects the on/off time of the exit sensor and if jam status is detected then  
JAM2 is displayed the on the LCD panel.  
5) Cover Open Sensing  
The Cover open sensor actuator is located on the front cover and the senor is in the main frame.  
When the front cover is open the +24V and +5V supplies to the DC fan, solenoid, main motor, polygon motor part of  
LSU, HVPS and LSU Laser diode are cut off. The CPU monitors signal (COVER_OPEN, GPIO_11) to recognize when  
the cover is open.  
6) DC FAN / SOLENOID Driver  
It is driven by a transistor and controlled by signal (FAN, GPIO_7; Main Clutch Solenoid:PIN 185,MP Clutch Solenoid:  
PIN 184) bit of the CPU.  
When it is high the fan is activated by turning on the TR, and it is off when the sleep mode is selected. There are three  
solenoids and these are driven by the Paper Pick-up, Regi and MP signals. The diode protects the driving TR from the  
Back-EMF pulse which is generated when the solenoid is de-energized.  
7) Motor Driver  
The motor driving circuit is activated when the Driver IC is enabled. An AN44060 (Motor driver IC) is used in this case.  
The resistance Rs value of sensing and the voltage value of the V reference can be changed by the motor driving volt-  
age value.  
Service Manual  
4-11  
Samsung Electronics  
Summary of Product  
4.4 SMPS & HVPS  
The SMPS and HVPS are on one integrated board.  
The SMPS supplies the DC power to the system. It takes either 110V or 220V and outputs the +5V and 24V  
supplies to the main and other PBAs.  
The HVPS creates the high voltage of THV/MHV/Supply/Dev and supplies it to the toner cartridge. The CPU is  
used to modify some of these voltage settings to provide the ideal voltages to create the image.  
The HVPS part uses the 24V and outputs the high voltage for THV/MHV/BIAS and the outputted high voltage is  
supplied to the toner, OPC cartridge and transfer roller.  
F2  
F1  
CN3  
(FAN CON.)  
CN4  
(PANEL CON.)  
110V : 125V/3A  
220V : 250V 2A H  
110V : 125V/8A  
220V : 250V T 5A H  
THV  
CN1  
(H/L CON.)  
DEV  
MHV  
OPC  
SUPPLY  
COVER OPEN SWITCH  
MANUAL SENSOR  
FEED SENSOR  
PAPER-EMPTY SENSOR  
EXIT SENSOR  
F101  
MAIN PBA CON.  
250V L2A  
Service Manual  
4-12  
Samsung Electronics  
Summary of product  
4.4.1 HVPS(High Voltage Power Supply)  
1) Transfer High Voltage (THV+)  
- Function : It is this voltage that transfers toner from the OPC Drum to the paper.  
- Output voltage : Maximum +5000V ±5% (no load, variable duty cycle)  
- Error : IF THV (+) is not present, low density printing occurs due to toner on the OPC Drum not being  
transferred to the paper. It is possible that waste toner over-flow can occur if this condition persists.  
Ghost images may appear which repeat at 76mm intervals.  
2) Charge Voltage (MHV)  
- Function : It is this voltage that charges the surface of the OPC to -900V ~ -1000V.  
- Output voltage : -1300V ~ -1800V DC ± 50V  
- Error : IF MHV is not present toner then since the OPC drum surface has no charge toner is attracted to the  
whole OPC surface. A black page is printed out when this happens.  
3)Cleaning Voltage (THV-)  
- Function : It removes toner contamination from the rear side of the paper by sending (-) polarity to the transfer  
roller forcing toner to transfer back to the to OPC drum.  
- Output Voltage : -1000VDC, +300V/-150V  
- Error : Smudges and toner contamination on the reverse side of the printed page.  
4) Developing Voltage (DEV)  
- Function: It is this voltage that develops toner with on to the section of the OPC drum surface exposed by the  
LSU (Laser Scanning Unit).  
* When printing the exposed voltage on the OPC is -180V, unexposed is -970V, and the exposing voltage on  
the DEV is -330V. Therefore toner with (-) polarity is developed onto an exposed section of the OPC.  
- Output voltage: -200V ~ 600V DC ± 20V  
- Error: a) If DEV is GND, print density gets extremely low.  
b) When DEV is floating due to poor connection between the frame and cartridge contacts etc., print  
density gets extremely high.  
5) Supply Voltage (SUP)  
- Function: It is this voltage that supplies toner to the developing roller.  
- Output voltage: : -350V ~ -750V DC ± 50V (Use ZENER)  
- Error: a) When SUP is GND print density gets extremely low.  
b) If SUP is floating due to poor connection between the frame and cartridge contacts etc.  
density gets extremely low such that it is hard to see toner with the eyes  
6) OPC Ground ZENER Voltage  
- Function: It is this voltage that prevents image contamination under low temperature and low humidity  
environment conditions.  
- When a set prints without an output voltage, -130V DC ± 15V is maintained on OPC ground. (-130V ZENER  
diode is connected to OPC ground)  
- Error type: a) When the ZENER diode is - 0V there is no serious image problem in general environment, but  
in low temperature and low humidity environments it is possible that contamination can occur on  
the entire image  
b) When the ZENER diode is disconnected a blank page is printed out. (It is the same when a  
ZENER diode is disconnected from OPC ground.)  
Service Manual  
4-13  
Samsung Electronics  
Summary of Product  
4.4.2 SMPS (Switching Mode Power Supply)  
This is the power source for the whole system. It is an independent module so that it is possible to use it for  
common use. It is mounted at the bottom of the set.  
It consists of the SMPS section, which supplies the DC power to drive the system, and the AC heater control part,  
which supplies the power to the fuser. The SMPS has four output channels (+5V, +3.3V, +3.3VS and +24VS).  
There are three kinds of power, 120V exclusive (America), 220V exclusive (Europe), and 220V for China (nations  
with unstable power supply).  
1) AC Input  
- Inputting rated voltage : AC 220V ~ 240V AC 100~127V  
- Inputting voltage fluctuating range : AC 198V ~ 264V AC 90V ~ 135V  
- Rated frequency : 50/60 Hz  
- Frequency fluctuating range : 47 ~ 63 Hz  
- Inputting Current : Under 4.0Arms/2.0Arms (when heat lamp is off)  
2) Rated Power Output  
NO  
1
Item  
CH1  
CH2  
CH3  
Remark  
Channel name  
Connector Pin  
+5V  
+24V  
+24.0VS  
2
CON 4  
CON 4  
CON 4  
5V PIN: 3, 4, 23  
GND PIN: 5, 6  
24V PIN : 14  
GND PIN: 8, 9, 10  
24V PIN: 11, 12  
GND : 8, 9, 10  
3
Rated Output Voltage  
+5V ± 5%  
(4.75 ~ 5.25V)  
+24V - 10/15%  
(21.6 ~ 27.46V)  
+24VS - 10/15%  
(21.6 ~ 27.46V)  
4
5
6
7
Max. Output current  
Peak Loading voltage  
Ripple noise voltage  
Maximum output  
1.0 A  
0.5A  
1.0 A  
1.5 A  
1.0A  
1.5 A  
1ms  
Under 150m Vp-p  
5.0W  
Under 500m Vp-p  
12W  
Under 500m Vp-p  
24W  
3) Consumption Power  
NO  
Item  
CH1  
CH2  
CH3  
System  
(+5V)  
(+24V)  
0.07A  
0.5A  
(+24VS)  
1
2
3
Stand-By  
0.2 A  
1.0 A  
0.2A  
0.07 A  
1.0 A  
AVG : 60 Wh  
AVG : 300 Wh  
AVG : 10 Wh  
PRINTING  
Sleep-Mode  
0.02A  
0.03A  
4) Length of Power Cord : 1830 ± 50mm  
5) Power Switch : Fitted  
Service Manual  
4-14  
Samsung Electronics  
Summary of product  
6) Feature  
- Insulation resistance : over 50M Ω (at DC500V)  
- Insulation retest pressure : Must be no problem within 1min. (at 1500Vzc, 10mA)  
- Leakage voltage : under 3.5mA  
- Running voltage : under 40A peak (at 25°c, Cold start) Under 60A peak (in other conditions)  
- Rise Time : Within 2Sec  
- Fall Time : Over 20ms  
- Surge : Ring Wave 6KV-500A (Normal, Common)  
7) Environment Condition  
- Operating temperature range : 0°c ~ 40°c  
- Storage temperature range : -25°c ~ 85°c  
- Storage humidity range : 30% ~ 90% RH  
- Operating atmospheric pressure range : 1  
8) EMI Requirement : CISPR ,FCC, CE, MIC, C-Tick,  
9) Safty Requrement  
- IEC950 UL1950, CSA950, C-UL,Semko,iK,CB, CCC(CCIB),GOST, EPA,  
4.4.3 Fuser AC Power Control  
The Fuser (HEAT LAMP) is heated using AC power. The AC power is controlled by a Triac (THY1), a semiconductor  
switch. 'On/Off control' is achieved when the gate of the Triac is turned on/off by a Photo triac (PC1), this is an  
insulting part.  
In the other words the AC control part is a passive circuit. It turns the heat lamp on/off by taking a signal from the  
engine control section. When the 'HEATER ON' signal is activated by the engine the LED of PC1 (Photo Triac)  
flashes. The flashing light causes the Triac (PC1) to switch and a voltage is supplied to the gate of Triac THY1.  
As a result AC current flows in the heat lamp, and heat is produced. On the other hand, when the signal is off,  
PC1 is off, the voltage is cut off at the gate of Triac THY1, this Triac is therefore off, and thus the heat lamp is  
turned off.  
1) Triac (THY1) feature  
- 12A,600V SWITCHING  
2) Phototriac Coupler (PC3)  
- Turn On If Current : 15mA ~ 50mA(Design: 16mA)  
- High Repetive Peak Off State Voltage : Min 600V  
Service Manual  
4-15  
Samsung Electronics  
Summary of Product  
4.5 Engine F/W  
4.5.1 Feeding  
If feeding from the cassette the drive of the pickup roller is controlled by controlling the pick-up solenoid. The on/off  
of the solenoid is controlled by controlling the general output port or the external output port. If feeding from the  
manual feeder the set decides to feed the paper according to the operation of the manual sensor, and by driving  
the main motor, insert the paper in front of the feed sensor. When paper moves the occurrence of a paper jam is  
judged as below.  
4.5.1.1 Jam 0 – Jam in Feed area  
• After a page was picked up, paper did not enter the unit due to a paper misfeed.  
• After a page was picked up, paper entered but it did not reach the feed sensor in certain time due to slip, etc.  
• After a page was picked up, if the feed sensor is not on try to pick up again. After retrying if the feed sensor is still  
not on after certain time, it is Jam 0.  
- this indicates that the leading edge of the paper doesn't pass the feed sensor within a certain time.  
• Even though the paper reaches the feed sensor, the feed sensor does not turn on.  
- this indicates that the leading edge of the paper already passed the feed sensor or that the sensor is faulty.  
4.5.1.2 Jam 1 – Jam inside the print engine  
• After the leading edge of the paper passes the feed sensor, the trailing edge of the paper does not pass the feed  
sensor within certain time. (During this time the feed sensor cannot be Off)  
• After the leading edge of the paper passes the feed sensor, the paper does not reach the exit sensor within a  
certain time. (The exit sensor cannot be On during this time)  
- There is already paper between the feed sensor and the exit sensor.  
4.5.1.3 Jam 2 – Jam in the Exit area  
• After the trailing edge of the paper passes the feed sensor the trailing edge of the paper does not pass the exit  
sensor within certain time.  
4.5.2 Drive  
The main motor drives the paper feed, developing unit and the Fuser It is driven by software which controls the  
acceleration, constant speed and deceleration profiles. The Motor is managed with an AN44060 driver IC and  
controlled by step and enable signals from the CPU.  
4.5.3 Transfer  
The charging voltage, developing voltage and the transfer voltage are controlled by PWM (Pulse Width  
Modulation). Each output voltage is changeable according to the PWM duty cycle. The transfer voltage used when  
the paper passes the transfer roller is decided by environment recognition. The resistance value of the transfer  
roller changes due to the surrounding environment in the room or within the set, this change in resistance in turn  
changes the value of the voltage due to loading. This voltage is fed back into the set through the A/D converter.  
Based on this fed back value the PWM cycle is changed to maintain the required transfer voltage Page 4-10 has a  
different chip number Which is correct  
Service Manual  
4-16  
Samsung Electronics  
Summary of product  
4.5.4 Fusing  
The temperature of the heat roller's surface is detected according to the resistance value of the thermistor.  
The thermistor resistance is measured using the A/D converter and thus the CPU can determine the temperature of  
the heat roller. The AC power is controlled by comparing the target temperature to the value from the thermistor. If  
the value from the thermistor is out of the controlling range while controlling the fusing process, the error stated in  
the table occurs. (For the domestic model, the Q-PID method has been applied.)  
• Heat Lamp Method  
Error  
Description  
LCD Displat  
Open heat error  
When warming up, it has been lower  
All open heat error are blinking  
than 68°C over 28 seconds  
Lower heat error  
• Standby:  
All low heat error are blinking  
It has been lower than 80°C over 10 seconds  
• Printing:  
- 2 consecutive pages: it has been lower than  
145°C over 4 seconds.  
- 3 consecutive page; it has been 25°C lower  
than the fixed fusing temperature over 4 seconds.  
Over heat error  
It have been higher than 220°C over 3 seconds  
All over heat error are blinking  
4.5.5 LSU  
The LSU consists of the LD (Laser Diode) and the polygon motor control. When the printing signal occurs, the LD  
is turned on and the polygon motor is enabled. When the light sensor detects the beam, Hsync occurs. When the  
polygon motor speed becomes a normal, LReady occurs. If these two conditions are satisfied, the status bit of the  
LSU controller register becomes 1 and the LSU is judged to be ready. If the two conditions are not satisfied, the  
error shown in the table below occurs.  
Error  
Description  
Polygon motor error  
When the polygon motor’s speed doesn’t  
reach operating speed  
Hsync error  
The polygon motor’s speed is normal,  
but the Hsync signal is not created.  
Service Manual  
4-17  
Samsung Electronics  
Summary of Product  
MEMO  
Service Manual  
4-18  
Samsung Electronics  
Disassembly and Reassembly  
5. Disassembly and Reassembly  
5.1 General Precautions on Disassembly  
5
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  
5-1  
Samsung Electronics  
Disassembly and Reassembly  
5.2 Front and Rear Cover Units  
1. Take the Cassette out of the printer.  
3. Remove the 4 screws securing the Rear Cover and  
remove it, as shown below.  
Rear Cover  
Cassette  
2. Remove the Front Cover in the direction of arrow.  
Service Manual  
5-2  
Samsung Electronics  
Disassembly and Reassembly  
5.3 Side Covers  
1. Before you remove the Side Cover(Left Cover, Right  
Cover), you should remove:  
-Rear Cover (see page 5-2)  
3. Remove 1 screw at the front of the unit. Unclip the  
right cover along the top edge and remove it from the  
Frame Assembly.  
-Front Cover (see page 5-2)  
Left Cover  
2. Remove 1 screw at the front of the unit. Unclip the  
right cover along the top edge and remove it from the  
Frame Assembly.  
Right Cover  
Service Manual  
5-3  
Samsung Electronics  
Disassembly and Reassembly  
5.4 Scanner Ass’y  
< Caution >  
1. Before disassembling the Scanner Ass'y first lift  
it carefully at the front edge. The support lever  
will automatically raise into position.  
2. Take care not to trap your fingers or hand in the  
mechanism.  
5.4.1 Remove Scanner Ass’y  
1. Before you remove the Scanner Ass'y, you should  
remove:  
3. Carefully lift the Scanner Ass’y from the base taking  
care to thread the cables through the frame.  
-Rear Cover (see page 5-2)  
Scanner Ass’y  
-Side Cover(Left Cover, Right Cover)(see page 5-3)  
2. Remove the 2 connectors from the main PBA and  
release the ground wire from the Motor Drive Ass’y as  
shown below.  
Service Manual  
5-4  
Samsung Electronics  
Disassembly and Reassembly  
5.4.2 Dismantle Scanner Ass’y  
< Caution >  
1. Before disassembling the scanner module  
remove the 2 plastic spacers from each end of  
the scanner module.  
1. Lift the Platen Cover upward and remove it.  
3. Remove the CCD Cable, as shown below.  
FFC Cable  
Platen Cover  
2. Release 8 clips (2 per side) securing the scanner  
upper frame to the scanner lower frame and remove  
the upper frame  
Scan Upper  
Service Manual  
5-5  
Samsung Electronics  
Disassembly and Reassembly  
4. Pull up the CCD Shaft and take out the Scanner  
Module.  
6. Remove the Pulley Idle, as shown below.  
Pulley Idle  
Spring  
ETC Belt  
Scanner Module  
Pulley Bracket  
CIS Shaft  
7. Remove the 2 screws and take out the Scan Motor  
Ass'y.  
5. Push the Belt Holder and take out the Belt, as shown  
below.  
Scan Motor  
Belt  
Ass’y  
Service Manual  
5-6  
Samsung Electronics  
Disassembly and Reassembly  
5.5 Middle Cover  
1. Disconnect the OPE harness from the Main PBA and  
remove the 4 screws securing the Middle Cover.  
Remove it, as shown below.  
2. Remove the 4 screws securing the OPE Unit from the  
Middle Cover.  
Middle Cover  
OPE Unit  
OPE Harness  
Service Manual  
5-7  
Samsung Electronics  
Disassembly and Reassembly  
5.6 Fuser(Heat Lamp Type)  
1. Before you remove the Fuser, you should remove:  
-Rear Cover (see page 5-2)  
4. Remove 2 screws and take the Halogen Lamp out of  
the Heat Roller.  
2. Unplug two connectors from the boards and then  
remove 4 screws. Remove the Fuser Ass’y taking  
care not to damage the Exit Sensor.  
Heat Roller  
Fuser Ass’y  
Halogen Lamp  
5.Remove 1 screw and take the Idle Gear out.  
Idle Gear  
3. Remove 2 screws and take the Thermostat out of the  
Fuser.  
Thermostat  
Service Manual  
5-8  
Samsung Electronics  
Disassembly and Reassembly  
6. Remove 4 screws and divide the Fuser into two parts.  
8. Remove the Thermister from the Fuser Cover.  
Fuser Cover  
Thermister  
7. Unwrap the Thermistor Harness, as shown below.  
Thermister Harness  
Service Manual  
5-9  
Samsung Electronics  
Disassembly and Reassembly  
5.7 Exit Roller  
1. Before you remove the Exit Roller you should remove:  
- Rear Cover (see page 5-2)  
- Side Covers (see page 5-3)  
2. Remove the white Exit Gear, and release a bearing  
clip at one end then remove the shaft and rollers as  
shown below.  
- Scanner Ass’y (see page 5-4)  
- Middle Cover (see page 5-6)  
Exit Gear  
Bearing  
Exit Roller  
1
2
5.8 LSU  
1. Before you remove the LSU you should remove:  
- Rear Cover (see page 5-2)  
- Side Covers (see page 5-3)  
- Scanner Ass’y (see page 5-4)  
- Middle Cover (see page 5-6)  
3. Unplug 4 screws and take the LSU out.  
LSU  
2. Unplug 2 connector from the LSU.  
Service Manual  
5-10  
Samsung Electronics  
Disassembly and Reassembly  
5.9 Fan  
1. Before you remove the Fan you should remove:  
- Rear Cover (see page 5-2)  
2. Unplug the connector from the SMPS and remove 1  
screw. Then take out the Fan.  
- Right Side Cover (see page 5-3)  
DC Fan  
5.10 Drive Ass’y  
1. Before you remove the Drive Ass’y, you should  
remove:  
3. Unplug 1 connector from the Drive Ass'y.  
- Rear Cover (see page 5-2)  
- Left Side Cover (see page 5-3)  
Drive Ass’y  
2. Remove the 6 screws from the Drive Ass’y.  
Note when re-fitting the motor Drive Ass’y tighten the  
screws in the order that they are numbered on the Motor  
Drive Ass’y base plate.  
Service Manual  
5-11  
Samsung Electronics  
Disassembly and Reassembly  
5.11 Engine Shield Ass’y  
1. Before you remove the Fuser, you should remove:  
- Rear Cover (see page 5-2)  
- Side Covers (see page 5-3)  
2. Remove the 14 screws securing the Engine Shield  
Ass'y and unplug the all connectors. Then remove the  
Engine Shield Ass'y.  
- Fuser Connector (see page 5-7)  
Engine Shield  
Ass’y  
5.12 Main PBA  
1. Before you remove the Main PBA, you should  
remove:  
- Rear Cover (see page 5-2)  
- Side Covers (see page 5-3)  
- Fuser Connector (see page 5-7)  
- Engine Shield Ass'y (see page 5-11)  
2. Unplug 1 connector and remove 5 screws from the  
Main PBA. Then lift the Main PBA out as shown  
below.  
Main PBA  
Service Manual  
5-12  
Samsung Electronics  
Disassembly and Reassembly  
5.13 SMPS  
1. Before you remove the SMPS, you should remove:  
- Rear Cover (see page 5-2)  
4. Remove 3 screws and take the SMPS out.  
- Side Covers (see page 5-3)  
- Fuser Connector (see page 5-7)  
- Engine Shield Ass'y (see page 5-11)  
SMPS  
2. Unplug 1 connector and remove 3 screws then take  
the Inlet Bracket out.  
Inlet Bracket  
3. Remove 1 screw and unplug 1 connector from the  
Main PBA.  
Service Manual  
5-13  
Samsung Electronics  
Disassembly and Reassembly  
5.14 Transfer Roller  
1. Before you remove the Transfer Roller you should  
remove:  
4. Unlatch the Bush and remove it. Then lift the Transfer  
Roller out, as shown below.  
- Rear Cover (see page 5-2)  
- Side Covers (see page 5-3)  
- Scanner Ass’y (see page 5-4)  
- Middle Cover (see page 5-6)  
- LSU(see page 5-9)  
Transfer  
Roller  
Bush  
2. Remove 3 screws and take the Transfer Earth out.  
Transfer  
Earth  
3. Unplug the PTL Holder Connector then remove the  
PTL Holder and PTL Lens as shown below. Take care  
to note the orientation of the PTL lens and ensure it is  
refitted correctly  
PTL  
PTL  
Lens  
Holder  
Service Manual  
5-14  
Samsung Electronics  
Disassembly and Reassembly  
5.15 Feed Roller  
1. Before you remove the Feed Roller you should  
remove:  
4. Remove 3 screws from the Feed Bracket and take it out.  
Feed Bracket  
- Rear Cover (see page 5-2)  
- Side Covers (see page 5-3)  
- Scanner Ass’y (see page 5-4)  
- Middle Cover (see page 5-6)  
- LSU (see page 5-9)  
- Drive Ass’y (see page 5-10)  
2. Remove 2 screws from the Guide Paper and take it out.  
Guide  
Paper  
5. Remove the Idle Gear and Feed Gear2.  
Feed Gear2  
3. Pull up the Feed Idle Bush and Feed Idle Shaft, as  
shown below.  
Idle Gear  
Feed Idle  
Shaft  
Bush  
6. Remove the Feed Gear 1 Ass’y, as shown below.  
Feed Gear1  
Ass’y  
Service Manual  
5-15  
Samsung Electronics  
Disassembly and Reassembly  
7. Remove the Feed Roller and Feed Roller1, as shown  
below.  
Feed Roller  
Feed Roller1  
Service Manual  
5-16  
Samsung Electronics  
Disassembly and Reassembly  
5.16 Pick Up Roller & Solenoid  
1. Before you remove the Pick Up Roller and Solenoid  
you should remove:  
4. Remove 2 screws then remove the Regi Solenoid and  
Pick Up Solenoid.  
- Rear Cover (see page 5-2)  
- Side Covers (see page 5-3)  
- Scanner Ass’y (see page 5-4)  
- Middle Cover (see page 5-6)  
- LSU (see page 5-9)  
- Drive Ass’y (see page 5-10)  
- Feed Bracket and Gears (See page 5-14 steps 4 - 6)  
(Pick up)  
Solenoid  
2. Remove the Pick up Gear Ass’y, as shown below.  
(Regi)  
Solenoid  
Pick up Gear  
Ass’y  
3. Remove the Pick up Ass’y, as shown below.  
Bush  
1
2
Pick up Ass’y  
Service Manual  
5-17  
Samsung Electronics  
Disassembly and Reassembly  
MEMO  
Service Manual  
5-18  
Samsung Electronics  
Alignment & Adjustments  
6. Alignment and Adjustments  
This chapter describes some of the main service procedures including:  
Using the EDC mode; Clearing paper jam and test patterns.  
Much of this chapter is also included in the user's guide.  
6
6.1 Engine Test Mode  
The Engine Tests Mode supplies useful functions to check the condition of the engine. It tests the condition of  
each device and displays the result of the test on the LCD. It is classified into 5 functions (0~4), and are shown  
below.  
6.1.1 To enter the Engine Test Mode  
To enter the Engine Test mode  
Menu/Exit  
Darkness  
Menu/Exit  
Press  
in sequence, and the LCD briefly displays  
'Engine Test [Diagnostic]', the machine has entered Engine Test Mode.  
• To enter a lower menu (Sub menu) Press the Start/Enter key.  
• To exit into an upper menu Press the Menu/Exit key.  
• To return to the user menu Press the Menu/Exit key.  
6.1.2 Diagnostic  
Main Menu  
Engine test  
Motor Test  
Remark  
ENGINE TEST  
MTR FAN SOL ETC  
1 : On, 2 : Off  
1 : On, 2 : Off  
1 : On, 2 : Off  
1 : On, 2 : Off  
1 : On, 2 : Off  
1 : On, 2 : Off  
1 : On, 2 : Off  
1 : On, 2 : Off  
Check : Check Start  
PickUp Test  
Fan Test  
Manual Clt Test  
PTL Test  
ENGINE TEST  
LSU TEST  
LSU Motor Test  
LSU Hsync Test  
LD Test  
ENGINE TEST  
SENSOR TEST  
Feed Sen Test  
Next : Next Sensor Check  
Check : Check Start  
Exit Sen Test  
Next : Next Sensor Check  
Check : Check Start  
Cover Sen Test  
Empty Sen Test  
Manual Sen Text  
Therm ADC 220~85  
Next : Next Sensor Check  
Check : Check Start  
Next : Next Sensor Check  
Check : Check Start  
Next : Next Sensor Check  
1 : On, 2 : Off (maintain the fusing temp. 65C~230C)  
ENGINE TEST  
HEAT TEST  
ENGINE TEST  
HVPS TEST  
MHV Test  
1 : On, 2 : Off (-1550V ± 50V)  
1 : On, 2 : Off (-430V ± 20V)  
1 : On, 2 : Off (-1000V +300V/-150V)  
1 : On, 2 : Off (+1300V ± 20V)  
1 : On, 2 : Off  
Dev Bias Test  
THV EN/NEG Test  
THV ON (1300V)  
THV ADC 1300V  
THV ADC 600V~3550V  
1 : On, 2 : Off (Compare each ADC Value)  
Service Manual  
6-1  
Samsung Electronics  
Alignment & Adjustments  
6.2 Paper Path  
SCAN PART  
L
S
U
L
S
U
L
S
U
Fuser  
Toner Cartridge  
CR  
Fuser  
Fuser  
Toner Cartridge  
Toner Cartridge  
CR  
CR  
DR  
OPC  
SR  
EXIT  
PR  
Sensor  
DR  
DR  
OPC  
SR  
OPC  
SR  
EXIT  
EXIT  
PR  
Sensor  
PR  
MP Sensor  
Feed  
Sensor  
Sensor  
TR  
FR  
MP Sensor  
Feed  
MP Sensor  
Feed  
Sensor  
Sensor  
TR  
FR  
TR  
FR  
Empty Sensor  
Empty Sensor  
Empty Sensor  
<Jam0>  
<Jam1>  
<Jam2>  
1) After receiving a print command, the printer feeds paper from the main cassette or manual feeder as required.  
2) The paper being fed passes the paper feed sensor. (Jam 0 occurs if the sensor is not operated within a certain  
time)  
3) Having passed the paper feed sensor the paper moves to the paper exit sensor via printing process. (Jam 1  
occurs if the sensor is not operated within a certain time)  
4) The paper then passes through the paper exit sensor and out of the set. (Jam 2 occurs if the trailing edge of the  
paper does not pass the exit sensor within a certain time of the paper leading edge activating the exit sensor)  
Service Manual  
6-2  
Samsung Electronics  
Alignment & Adjustments  
6.3 Clearing Paper Jams  
When a paper jam occurs, "Paper Jam" appears on the display. Refer to the table below to locate and clear the paper jam.  
Message  
Location of Jam  
PAPER JAM 0 OPEN/CLOSE DOOR  
In the paper tray  
PAPER JAM 1 OPEN/CLOSE DOOR  
PAPER JAM 2 CHECK INSIDE  
BYPASS JAM  
In the paper exit area  
In the fuser area or around the toner cartridge  
In the manual feeder  
To avoid tearing the paper, pull the jammed paper out gently and slowly. Follow the steps on the next pages to clear the jam.  
6.3.1 In the Paper Tray  
1 Open and close the front cover. The jammed paper  
is automatically ejected from the machine. If the  
paper is not ejected continue to step 2.  
4 Insert the paper tray into the machine until it snaps  
into place.  
5 Open and close the front cover to resume printing.  
2 Pull the paper tray open.  
3 Remove the jammed paper by gently pulling it  
straight out.  
If there is any resistance and the paper does not  
move when you pull or if you cannot see the paper  
in this area, skip to the fuser area around the toner  
cartridge. See page 6-5  
Service Manual  
6-3  
Samsung Electronics  
Alignment & Adjustments  
6.3.2 In the Paper Exit Area  
1 Open and close the front cover. The jammed paper  
is automatically ejected from the machine. If the  
paper is not ejected continue to step 2.  
6 Open the rear cover.  
7 Remove the jammed paper by gently pulling it  
straight out.  
2 Gently pull the paper out of the front output tray.  
Skip to step 9.  
If you cannot see the jammed paper in the front  
output tray, continue to step 3.  
3 Open the jam cover by lifting the front edge of the  
scanner unit. The support lever will automatically  
pop up.  
8 Close the rear cover.  
9 Open and close the front cover to resume printing.  
4 Pull the paper out gently.  
5 Close the jam cover by pushing the support tab to  
the left and hold it down whilst lowering the cover  
carefully until the cover fully down, this will hold  
down the tab.  
If there is any resistance and the paper does not  
move when you pull or if you cannot see the paper  
in the jam cover, continue to step 6.  
Service Manual  
6-4  
Samsung Electronics  
Alignment & Adjustments  
6.3.3 In the Fuser Area or Around the Toner Cartridge  
NOTE: The fuser area is hot. Take care when removing  
2 Remove the jammed paper by gently pulling it  
straight out.  
paper from the machine.  
1 Open the front cover and lightly push down on the  
cartridge then pull to take it out.  
3 Replace the toner cartridge and close the front  
cover.  
Printing automatically resumes.  
6.3.4 In the Manual Feeder  
“Bypass Jam” appears on the display when you try to print using the manual feeder and the machine does not detect  
paper, due to no paper or improper paper loading.  
The error message may also occur when the paper is not properly fed into the machine through the manual feeder.  
In that case, pull the paper out of the machine.  
Service Manual  
6-5  
Samsung Electronics  
Alignment & Adjustments  
6.4 Printing the System Data List  
Your machine can print the system data report which shows the status of the user-selectable options. You may print this  
list to confirm your changes after changing any settings.  
To print the system data list:  
1 Press Menu/Exit until "Report" appears on the top line of the display.  
"System Data" appears on the bottom line.  
2 Press Start/Enter.  
The system data list prints out.  
6.5 Clearing the Memory  
You can selectively clear information stored in your machine’s memory.  
1 Press Menu/Exit on the control panel until "Maintenance" appears on the top line of the display.  
2 Press the scroll button ( < or > ) until you see "Clear Settings" on the bottom line and press Start/Enter.  
The first available menu item, “Paper Setting” displays on the bottom line.  
3 Press the scroll button ( < or > ) until you see the item you want to clear.  
• Paper Setting: Restores all of the Paper Setting options to the factory default.  
• Copy Setup: Restores all of the Copy Setup options to the factory default.  
• All Settings: Resets all of your settings to the factory default.  
• Machine Setup: Resets all of the system settings, such as the display language and save modes, to the factory  
default.  
4 Press Start/Enter. The selected memory is cleared and the display asks you to continue clearing the next item.  
5 To clear another item, press Start/Enter and repeat steps 3 and 4. Or, to return to Standby mode, press Stop/Clear.  
6.6 Clearing the Drum  
If there are streaks or spots on your print, the OPC drum of the cartridge may require cleaning.  
1 Before carrying out the cleaning procedure, make sure that paper is loaded in the machine.  
2 Press Menu/Exit on the control panel until "Maintenance" appears on the top line of the display.  
The first available menu item, "Clean Drum", displays on the bottom line.  
3 Press Start/Enter.  
4 When the display asks you to confirm your selection, press Start/Enter.  
The machine prints a cleaning page. Toner particles on the drum surface are affixed to the paper.  
5 If the problem remains, repeat steps 1 through 4.  
Service Manual  
6-6  
Samsung Electronics  
Alignment & Adjustments  
6.7 Consumables and Replacement Parts  
The cycle period outlined below is a general guideline for maintenance.  
The example list is for an average usage of 50 transmitted and received documents per day.  
Environmental conditions and actual use will vary these factors.  
The cycle period given below is for reference only.  
COMPONENT  
Pick-up Roller  
REPLACEMENT CYCLE  
60,000 Pages  
Paepr Feeding Roller(Friction Pad)  
Transfer Roller  
60,000 Pages  
60,000 Pages  
Fuser  
60,000 Pages  
Toner Cartridge  
Original 1,000 Pages  
Replacement 3,000 Pages  
6.8 The LCD Status Display by Each Error  
LCD  
Meaning  
Solutions  
Door Open  
The front or rear cover is not securely  
latched.  
Close the cover until it locks into place.  
[JAM 1] or  
The toner cartrige is not installed.  
Install the toner cartridge.  
[No Cartridge]  
Low Heat Error  
Open Heat Error  
[Over Heat]  
There is a problem in the fuser unit.  
Unplug the power cord and plug it back in.  
(Tech Mode Reference)  
[LSU Error]  
A problem has occurred in the LSU  
(Laser Scanning Unit).  
Unplug the power cord and plug it back in.  
(Tech Mode Reference)  
No Paper  
The paper tray has run out of paper.  
Load paper in the paper tray.  
[Add Paper]  
Paper Jam 0  
Open/Close Door  
Paper has jammed in the feeding area of  
the paper tray.  
Clear the jam.  
Paper Jam 1  
• Paper has jammed in the fuser area.  
• Clear the jam.  
Open/Close Door  
• A paper jam has occurred in the manual  
feeder or the machine detects non-  
feeding from the manual feeder.  
• Clear the jam.  
Paper has jammed in the paper exit area.  
Paper Jam 2  
Check Inside  
Clear the jam.  
Service Manual  
6-7  
Samsung Electronics  
Alignment & Adjustments  
6.9 Periodic Defective Image  
If a mark or other printing defect occurs at regular intervals down the page it may be caused by a damaged or  
contaminated roller. Measure the repetition interval and refer to the table below to identify the roller concerned.  
No  
1
Roller  
Defective image  
75.5mm  
Typical defect  
white spot on black image or black spot  
black spot  
OPC Drum  
2
Charge Roller  
Supply Roller  
Developing Roller  
Transfer Roller  
Heat Roller  
37.7mm  
3
47.8mm  
light or dark horizontal image band  
horizontal image band  
4
35.2mm  
5
45.3mm  
image ghost  
6
57.1mm  
Black spot and image ghost  
black spot on the backside  
7
Pressure Roller  
59.7mm  
L S U  
Fuser  
Toner Cartridge  
2
6
4
1
3
7
MP Sensor  
5
5
6
7
Tramsfer Roller  
Heat Roller  
1
2
3
4
OPC Drum  
SCAN PART  
Charge Roller  
Supply Roller  
Pressure Roller  
Developing Roller  
<Rollers Layout>  
Service Manual  
6-8  
Samsung Electronics  
Troubleshooting  
7. Troubleshooting  
7.1 Printing Problems – Causes and Solutions  
7
7.1.1 Vertical Black Lines and Bands  
1. Straight thin black vertical lines occur in the printing.  
2. Dark black vertical bands occur in the printing.  
• Description  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. Damaged developer roller, deformed  
Doctor-blade or cleaning-blade in the  
Toner cartridge.  
1. Replace the toner cartridge and test  
again.  
2. Scratched surface of the charge roller in  
the toner cartridge.  
2. Replace the toner cartridge and test  
again.  
3. 3. Depression or deformation of the  
surface of the transfer roller.  
3. Replace the transfer roller and test again.  
7.1.2 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. 1. Contamination of the window or  
internal lenses of LSU mirror.  
1. Clean the LSU window with recommended  
cleaner (IPA) Clean the window with a  
clean cotton swab. If dirt is inside the LSU  
– replace LSU.  
2. Foreign object inside the toner cartridge  
or low toner.  
2. Replace the toner cartridge.  
3. Clean the exposure window.  
3. Foreign object, contamination or burr on  
the edge of the toner cartridge window.  
4. If the fuser is defective, voids occur  
periodically at the top of a black image.  
4. Open the front cover and check the ribs  
that correspond to the position of the  
voids. Remove if found.  
5. Contamination of the OPC drum.  
5. If the problems are not solved, replace  
the toner cartridge.  
6. Depression or deformation of the surface  
of the transfer roller  
6. Replace the transfer roller.  
Service Manual  
7-1  
Samsung Electronics  
Troubleshooting  
7.1.3 Horizontal Black Bands  
1. Dark or blurry horizontal stripes occur in the printing periodically.  
(These may occur at regular intervals down the page.)  
• Description  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
1. Bad contacts on the toner cartridge high  
voltage terminals.  
1. Clean all HV terminals on the cartridge and  
on the set frame. Ensure all toner or paper  
dust particles are removed.  
2. The rollers in the toner cartridge may be  
contaminated.  
2. Clean the right Gear that has relatively  
small tooth gap on the OPC.  
Charge roller = 37.7 mm  
Supply roller  
=
47.8 mm  
Develop roller = 35.2 mm  
Transfer roller = 45.3 mm  
3. If the problem persists replace the toner  
cartridge.  
7.1.4 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. Print several OPC cleaning Mode Prints  
and then 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. 75.5 mm repetition: Examine the surface of  
the OPC drum and carefully clean with a  
soft, lint free cloth. If unsuccessful replace  
the cartridge.  
37.7mm repetition: Replace the toner car-  
tridge  
3. If a black image is partially broken, the  
transfer voltage is abnormal or the  
transfer roller's life has expired.  
3. The transfer roller guarantees 60,000  
sheets printing. If the roller's life is expired,  
replace it.  
Note. Cleaning the inside of the set to  
remove excess toner particles or paper  
dust will reduce the occurrence of this  
problem..  
Service Manual  
7-2  
Samsung Electronics  
Troubleshooting  
7.1.5 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. Toner Save mode enabled  
1. Ensure the Toner Save mode is off. Check  
set and driver settings.  
2. Develop roller is contaminated or the  
toner cartridge is almost empty.  
2. Replace the toner cartridge and try to print  
out again.  
3. Ambient temperature is below than 10°C.  
3. Wait 30 minutes after printer is powered on  
before you start printing.  
4. Bad contact caused by dirty terminals on  
the toner cartridge or set.  
4. Clean the cartridge and set contacts.  
Generally clean dirt from inside the set.  
5. Abnormal output from the HVPS.  
(Run EDC mode – see sections 6.1.2  
and 6.1.3)  
5. Replace the HVPS if the problems are not  
solved by the above four instructions.  
7.1.6 Dark Image or a Black  
• Description  
The printed image is dark.  
Check and Cause  
Solution  
1. No charge voltage in the engine board.  
1. Check the state of the connector which  
connects the engine board and HVPS.  
2. Charge voltage fault due to bad contact  
between toner cartridge and set contacts.  
2. Clean the high voltage charge terminals.  
Note if 1 and 2 do not resolve the problem  
and the problem persists replace the  
HVPS.  
3. VD0 signal of the Main PBA is Low state.  
3. Replace the LSU Unit or Main PBA.  
Service Manual  
7-3  
Samsung Electronics  
Troubleshooting  
7.1.7 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 holders are damaged.  
1. Replace both the left and right bush and  
spring assemblies.  
2. The life of the Toner cartridge has  
expired.  
2. Replace the toner cartridge and try to print out  
3. The toner level is not even on the toner  
cartridge roller due to the damaged blade  
or low toner.  
3. Gently shake the toner cartridge and try  
printing again. If the problem persists  
replace the toner cartridge.  
7.1.8 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. Printing large quantities of low coverage  
(2%) pages or the printer has not been  
used for a long time.  
1. The toner cartridge is basically designed to  
print 3,000 sheets with 5% image. If it  
prints more than 3,600 sheets with 2%  
coverage, a background can occur.  
2. Is a recycled toner cartridge be  
used?  
2. The A/S is not guaranteed if using a recy-  
cled toner cartridge.  
Note try shaking the toner cartridge gently  
from side to side. If the problem persists  
replace the toner cartridge.  
3. Has the life span of the toner  
cartridge ended?  
3. Replace the toner cartridge when its life is  
expired.  
4. Is the movement(Up and Down) of  
the transfer roller smooth?  
4. Clean the transfer roller bushes.  
5. Is the HVPS normal?  
5. Clean the high voltage charge terminals.  
If this does not resolve the problem replace  
the HVPS.  
Service Manual  
7-4  
Samsung Electronics  
Troubleshooting  
7.1.9 Ghost (1)  
• Description  
Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.  
Check and Cause  
Solution  
1 and 2. Clean all HV contacts, If problem  
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 Toner cartridge.  
persists replace the HVPS.  
Digital Printer  
Digital Printer  
If problem still persists replace the Main PBA  
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.  
3. Replace the toner cartridge and try to print  
out.  
3. The life of toner cartridge is expired.  
4. Check the transfer roller lifetime and  
replace it.  
4. Transfer roller life (60,000 sheets) has  
expired.  
5. Wait about 30 minutes after power on  
before using printer.  
5. Low ambient temperature (below 10°C).  
6. Replace the toner cartridge and try to print  
out again  
6. Damaged cleaning blade in the toner  
cartridge.  
7.1.10 Ghost (2)  
Ghost occurs at 75 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  
normal paper or transparencies, such as  
OHP, a higher transfer voltage is required.  
Ensure that the correct paper type is selected  
in the printer driver or application software.  
Remember to set back to normal paper after  
use.  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Service Manual  
7-5  
Samsung Electronics  
Troubleshooting  
7.1.11 Ghost (3)  
• Description  
Ghost occurs at 57 mm intervals.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
Fuser contamination.  
1. Disassemble the fuser and remove any  
contamination on the rollers. Clean any  
contamination from between the  
Thermistor and the Heat roller. (Caution:  
Take care not to deform the rollers.)  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
7.3.12 Ghost (4)  
• Description  
A White ghost occurs in a black image printing at 35.5 mm intervals.  
Check and Cause  
Solution  
Digital Printer  
Digital Printer  
1. The life of the developer may be expired.  
1. Problem in the toner cartridge, replace the  
toner cartridge and try to print out again.  
Digital Printer  
Digital Printer  
2. Abnormal output from the HVPS.  
(Run EDC mode – see sections 6.1.2)  
2. Check the HVPS supply voltage. Clean all  
HV terminals on the cartridge and on the  
set. Replace the HVPS if the problem  
persists.  
Digital Printer  
Digital Printer  
7.1.13 Stains on the Face of the 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  
toner cartridge.  
1. Replace the toner cartridge.  
2. If the transfer roller is contaminated,  
stains on the face of page will occur.  
2. If the transfer roller is contaminated, run  
PC Cleaning Mode Print 2 or 3 times and  
then perform Self-Test 2 or 3 times to  
remove contamination.  
Service Manual  
7-6  
Samsung Electronics  
Troubleshooting  
7.1.14 Stains on Back of Page  
• Description  
The back of the page is stained at 46.5 or 58.7 mm intervals.  
Check and Cause  
Solution  
Digita
Digita
Digital Printer  
Digital Printer  
Digital Printer  
1. 46.5mm : Transfer roller is contaminated.  
1. Perform the OPC Cleaning Mode Print 2 or  
3 times. Run Self-Test to remove the  
contamination from the transfer roller.  
Note. Replace the transfer roller if  
contaminated severely.  
2. Disassemble the fuser and clean the  
H/R(Heat Roller) and P/R(Pressure roller).  
Check and clean the area between the  
H/R and the Thermistor. (Caution: Take  
care not to deform the rollers.)  
2. 58.7mm : Pressure roller is contaminated.  
7.1.15 Blank Page Print out (1)  
• Description  
Blank page is printed.  
Check and Cause  
Solution  
Bad ground contacts in OPC and/or toner  
cartridge.  
1. Check if the Ground-OPC or the OPC  
Ground Zener diode are defective or open  
circuit. (set inside left side).  
2. Remove contamination of the terminals on  
the toner cartridge and the unit.  
7.1.16 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. Abnormal solenoid.  
1. Perform the engine self test using TECH  
Mode to check if the Solenoid is normal.  
If the problem persists replace the main  
PBA  
Service Manual  
7-7  
Samsung Electronics  
Troubleshooting  
7.2 Copy Problems  
7.2.1 White Copy  
• Description  
Blank page is printed out when copying.  
Check and Cause  
Solution  
1. Check the Scanner Cover is properly closed.  
2. Check shading profile.  
1. Room light can pass through a thin original.  
2. Redo shading profile in the tech mode.  
3. Check white/black reference voltage on Main PBA. e.q  
• CIS_SI, CIS_CLK at CN7  
3. Replace CN7 if it is defective.  
• CN7-Pin6(CIS-SI)  
• Or Check the FFC  
• CN7-Pin7(CIS-CLK)  
7.2.2 Black Copy  
• Description  
Black page is printed out when Copying.  
Check and Cause  
Solution  
1. Check for CIS problem on the Main PBA.  
2. Check shading profile.  
1. Check the CIS harness is properly connected.  
2. Redo shading profile in the tech mode.  
Service Manual  
7-8  
Samsung Electronics  
Troubleshooting  
7.2.3 Abnormal noise  
• Description  
There is noise from the ADF when copying.  
Check and Cause  
Solution  
1. Check the Scanner Motor, gearbox and rollers.  
2. Check the Motor Driver on Driver PBA.  
1. Check for correct assembly of gears and motor.  
Ensure no parts are fouling and there are no foreign  
objects in the mechanism or scanner path. Replace  
any worn parts  
2. Replace the main PBA.  
7.2.4 Defective Image Quality  
• Description  
The copied image is excessively light or dark  
Check and Cause  
Solution  
1. Check shading profile.  
1. Redo shading profile in the tech mode.  
2. Check the gap between original and scanner  
glass.  
2. A gap of more than 0.5 mm can cause a blurred  
image. Ensure rollers and cover close correctly.  
Replace as necessary.  
3. Check printing quality.  
3. See "Print" troubleshooting.  
Service Manual  
7-9  
Samsung Electronics  
Troubleshooting  
7.3 Paper Feed problems – Causes and Solutions  
7.3.1 Wrong Print Position  
• Description  
Printing begins at wrong position on the paper.  
Check and Cause  
Solution  
Wrong sensor timing caused by defective feed sensor  
actuator.  
Replace the defective actuator  
7.3.2 JAM 0  
1. Paper does not exit from the cassette.  
2. Jam-0 occurs when the paper feeds into the printer.  
• Description  
Check and Cause  
Solution  
L
S
U
1. Check the Solenoid by using Tech  
Mode.  
1. Replace the solenoid.  
Fuser  
Toner Cartridge  
CR  
DR  
OPC  
SR  
EXIT  
PR  
Sensor  
MP Sensor  
Feed  
Sensor  
TR  
FR  
2. Check cassette/MP knock-up plate  
and springs.  
2. Repair / replace as required  
Empty Sensor  
3. Check paper separator pad  
3 Clean with soft cloth dampened with  
IPA (Isopropyl Alcohol) or water.  
Replace if required.  
4. Check the pick up roller for  
contamination and correct assembly.  
4. Clean with soft cloth dampened with  
IPA (Isopropyl Alcohol) or water.  
Replace if required  
5. If continuous clusters occur, check all  
rollers between pickup and registration  
sensor.  
5. Ensure all rollers are clean and free to  
operate correctly.  
6 If the paper feeds into the printer and  
Jam 0 occurs, perform Tech Mode to  
check feed sensor.  
6. Check the SMPS PBA, Main PBA and  
all connections. Replace any faulty  
parts or the  
Service Manual  
7-10  
Samsung Electronics  
Troubleshooting  
7.3.3 JAM 1  
1. Paper is jammed in front of or inside the fuser.  
2. Paper is stuck in the exit roller and in the fuser just after passing through the Actuator-Feed.  
• Description  
Check and Cause  
Solution  
L
S
U
1. If the recording paper is jammed in  
front of or inside the fuser.  
1. Replace the Exit-Sensor, SMPS or  
main PBA.  
Fuser  
Toner Cartridge  
CR  
DR  
OPC  
SR  
EXIT  
PR  
Sensor  
MP Sensor  
Feed  
Sensor  
TR  
FR  
Empty Sensor  
2. If the recording paper is stuck in the  
exit 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 movement is  
bad. Replace if necessary.  
7.3.4 JAM 2  
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.  
• Description  
Check and Cause  
Solution  
L
S
U
1. If the paper is completely fed out of  
the printer, but Jam 2 occurs: The  
Exit sensor may be defective.  
• After the paper is completely  
discharged the Exit sensor actuator  
should return to its original position  
to shut the photo-sensor. It may  
stick open or return only slowly due  
to contamination be paper debris or  
foreign objects.  
1. Check if the exit sensor actuator is  
defective.  
Fuser  
Toner Cartridge  
CR  
DR  
OPC  
TR  
SR  
EXIT  
PR  
Sensor  
MP Sensor  
Feed  
Sensor  
FR  
• Check if the actuator exit is deformed  
(Check if the lever part is deformed).  
• Check whether burrs occur in the  
assembly part of the exit actuator  
and if the actuator operates smoothly.  
• Check if foreign objects or paper  
debris are preventing the correct  
operation of the actuator.  
Empty Sensor  
2. If the paper is rolled in the Fuser  
Roller:  
• This occurs when a Guide claw is  
broken away, damaged or  
deformed.  
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.  
Check all ribs, claws and springs.  
• It occurs when the Spring of a  
Guide claw is broken or damaged.  
• It occurs when the Heat-Roller or  
Pressure-Roller is seriously  
contaminated with toner.  
Service Manual  
7-11  
Samsung Electronics  
Troubleshooting  
7.3.5 Multi-Feeding  
• Description  
Multiple sheets of paper are fed at once.  
Check and Cause  
Solution  
1. Adjust paper guides.  
1. Check that the paper size guides are set correctly  
(cassette and MPF tray).  
2. Solenoid malfunction (the solenoid does not work  
properly).  
2. Replace the solenoids or PBA as appropriate.  
3. Friction Pad is contaminated.  
3. Clean the friction pad rubber with a soft cloth  
dampened with IPA (Isopropyl Alcohol) or water.  
4. Paper has a rough surface texture.  
4. Use paper with a smother surface finish.  
7.3.6 Paper rolled in the fuser  
• Description  
Paper rolled around fuser rollers or ‘Concertina’ jam  
Check and Cause  
Solution  
1. Contamination of the pressure roller or heat roller.  
2. Damaged or deformed ribs, claws or springs.  
1. After disassembling the fuser, clean contamination  
from between the heat roller and the thermistor and  
also clean contamination from the pressure roller.  
Clean the surface of the rollers with IPA or water  
2. Check for damage or deformation of the print claws  
and the holder plate claws, and repair or replace as  
appropriate.  
Service Manual  
7-12  
Samsung Electronics  
Troubleshooting  
7.3.7 Paper rolled on the OPC Drum  
• Description  
Paper is rolled up in the OPC.  
Check and Cause  
Solution  
1. Paper is too thin.  
1. Use paper that conforms to the printer specification.  
2. Ensure paper is stored properly to prevent curl.  
2. The face of paper is curled.  
Note. To remove paper rolled in the OPC.  
• Remove the toner cartridge from the set, taking  
care not to touch the green surface. Use the  
gearwheel at the side to rotate the OPC drum and  
pull the paper from the cassette.  
• Clean fingerprints on the OPC gently with soft  
tissue, taking care not to scratch the surface.  
Service Manual  
7-13  
Samsung Electronics  
Troubleshooting  
7.4 Printer Faults – Causes and Solutions  
7.4.1 Fuser Error  
• Description  
A message "Open Heat Error/Over heat/Heating Error' is displayed in the LCD panel.  
Check and Cause  
Solution  
1. Thermostat, fuser power cable or heat lamp is  
open circuit.  
1. Replace the whole fuser assembly if the  
thermostat is open circuit.  
2. Thermistor is open circuit.  
2. Replace the whole fuser assembly if the ther-  
mistor sensor is faulty.  
3. Heat lamp ON/OFF test  
4. Drive gear melted  
3. Replace the fuser.  
7.4.2 LSU Error  
• Description  
A message "PMOTOR ERROR/HSYNC ERROR' is displayed in the LCD panel.  
Check and Cause  
Solution  
1. LSU cable or connector faulty.  
2. LSU motor is faulty.  
Use TECH mode to test the LSU  
- Replace the LSU  
- Replace a main board if the same error persists after  
replacing a LSU.  
3. Check the HSYNC signal.  
Service Manual  
7-14  
Samsung Electronics  
Troubleshooting  
7.4.3 Fuser gear melts due to overheating causing Paper Jam.  
Constant Jam where paper is entering Fuser unit.  
Fuser rollers do not turn  
• Description  
Check and Cause  
Solution  
1. Check the Heat Lamp, thermostat and thermistor  
1. Use EDC Mode to test the fuser.  
Replace Fuser unit  
Replace SMPS or Main PBA as appropriate.  
7.4.4 Paper Empty  
• Description  
Paper Empty is displayed in the LCD panel even when paper is loaded in the cassette.  
Check and Cause  
Solution  
1. Deformed paper sensor actuator or faulty sensor.  
2. SMPS PBA or Main PBA is defective  
3. Faulty cables or connectors.  
1. Replace the defective actuator or sensor.  
2. Replace the SMPS PBA or MAIN PBA as  
appropriate.  
Service Manual  
7-15  
Samsung Electronics  
Troubleshooting  
7.4.5 Paper Empty without indication  
• Description  
The paper empty message does not appear in the LCD when the paper cassette is empty.  
Check and Cause  
Solution  
1. Deformed paper sensor actuator or faulty sensor.  
1. Replace the defective actuator.  
2. SMPS PBA or Main PBA is defective  
.
2. Replace the SMPS PBA or MAIN PBA as  
appropriate  
7.4.6 Cover Open  
• Description  
The Cover Open message appears on the LCD even when the print cover is closed.  
Check and Cause  
Solution  
1. The ‘Open Cover’ microswitch may be stuck or faulty  
1. Use TECH mode(“cover sensor test”) to check  
cover switch operation. Check and replace switch if  
necessary.  
2. The tab on the front cover may be damaged or broken  
2. Replace the front cover.  
3. Check the connector and cables between Switch and  
main PBA.  
3. Replace the Main Control board or Cover Open  
S/W as necessary.  
Service Manual  
7-16  
Samsung Electronics  
Troubleshooting  
7.4.7 No error message when the cover is open  
• Description  
The Cover Open message does not appears on the LCD even when the print cover is open.  
Check and Cause  
Solution  
1. The ‘Open Cover’ microswitch may be stuck or faulty  
1. Use TECH mode(“cover sensor test”) to check  
cover switch operation. Check and replace switch if  
necessary.  
2. Check the connector and cables between Switch and  
main PBA.  
2. Replace the Main Control board or Cover Open  
S/W as necessary.  
Service Manual  
7-17  
Samsung Electronics  
Troubleshooting  
7.4.8 Defective motor operation  
• Description  
Main motor is faulty and paper does not feed into the printer, resulting in Jam 0'  
Check and Cause  
Solution  
1. The main motor harness or Motor PCB may be faulty.  
1. Check the motor harnesses and connectors, replace  
if defective.. If the problem persists replace the main  
PBA.  
Note Check motor operation using EDC Mode.  
7.4.9 No Power  
• Description  
When system power is turned on the LCD panel does 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. Check  
power fuse and SMPS fuses replace if necessary.  
2. LCD panel does not come on but normal start up  
sounds are heard.  
2. Replace the OP panel.  
3. After replacing SMPS display does not come on and no  
start up sounds are heard.  
3. Replace the main PBA panel.  
Service Manual  
7-18  
Samsung Electronics  
Troubleshooting  
7.4.10 Printed Vertical Lines become curved  
• Description  
When printing, vertical lines are not straight.  
Check and Cause  
Solution  
1. 24V stable - Replace LSU.  
1. Check stability of 24V supply to LSU.  
24V unstable replace SMPS, if the problem persists  
replace the main PBA.  
Service Manual  
7-19  
Samsung Electronics  
Troubleshooting  
7.5 Toner Cartridge Service  
Only toner cartridges supplied by Samsung should be used. Printing defects or set damage caused by the use of  
non-approved toner cartridges or un-licensed toner refills are not covered by the guarantee.  
7.5.1 Precautions on Safe-keeping of Toner Cartridge  
Excessive exposure to direct light for more than a few minutes may cause damage to the cartridge.  
7.5..2 Service for the Life of Toner Cartridge  
If the printed image is light due to the toner supply becoming low 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  
permanently.  
7.5.2.1 Redistributing Toner  
When the toner cartridge is near the end of its life, white streaks or light print occurs. You can temporarily reestablish the  
print quality by redistributing the remaining toner in the cartridge.  
1. Open the Front Cover.  
3. Unpack the new toner cartridge and gently shake it hor-  
izontally four or five times to distribute the toner evenly  
inside the cartridge.  
4. Save the box and the cover for shipping. Slide the new  
toner cartridge in until it locks into place.  
2. Lightly pushing the used cartridge down, pull it out.  
Note : Help the environment by recycling your used toner car-  
tridge. Refer to the recycling brochure packed with the  
toner cartridge for details.  
7.5.3 Standard of guarantee for consumable parts.  
Please refer to User's Manual or Instructions on Printer Consumables SVC manual for the criteria for judging the quality  
of consumable parts the standard of guarantee on those parts.  
• Spotting a refilled cartridge by eye.  
One way security screws are used in the manufacture of the cartridge – check if these are damaged.  
Service Manual  
7-20  
Samsung Electronics  
Troubleshooting  
7.5.4 Signs and Measures of Poor toner cartridge  
Fault  
Signs  
Cause & Check  
Solution  
1. All of 1, 2, 3  
If image quality improves by  
shaking, replace with a new  
toner cartridge. Perhaps up to  
100 pages left before out of  
toner.  
Light image and  
partially blank  
image  
(Cartridge life is  
ended.)  
• The printed image  
is light or dirty and  
untidy.  
1. If the image is light or dirty  
and untidy - Shake the toner  
cartridge and then recheck.  
OK: Lack of toner, so the life  
is nearly expired.  
• Parts of the image  
are not printed.  
2. Some part of image is not  
printed - Shake the toner  
cartridge and then recheck.  
(1)NG: clean the LSU window  
with a cotton swab, then  
recheck.  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
• Periodically a "tick  
tick" noise occurs.  
2. For item 2-  
If image quality improves after  
cleaning the LSU window then  
the toner cartridge is normal.  
(Contamination on the LSU  
window has caused image  
quality problems.)  
(2)OK: Lack of toner, so the  
life is nearly closed.  
3. Periodically a noise like "tick  
tick" occurs - Measure the  
time between ticks.  
3. For item 3-  
If the time between ticks is  
about 2 seconds, the toner  
inside the toner cartridge is  
almost exhausted.  
( Purchase and replace with a  
new toner cartridge. Perhaps up  
to 200 pages left before out of  
toner)  
4. White vertical stripes on the  
whole or part of the page :  
Shake the toner cartridge and  
then recheck. OK: Lack of  
toner, so the life is nearly  
expired  
4. For item 3-  
This is a phenomenon caused  
by lack of toner, so replace the  
toner cartridge.  
Toner  
Contamination  
• Toner  
1. Contamination at regular  
intervals.  
(a)Check the distance  
between contamination  
marks.  
(b)Check the appearance of  
both ends of the toner  
cartridge OPC drum.  
1.(a) Refer to section 6.5  
contamination of  
the printed page at  
regular intervals  
down the page.  
1.(b) If both ends of the OPC drum  
are contaminated with toner:  
Check no. of pages printed using  
this cartridge – perhaps waste  
toner collector is full.  
• Random Toner  
contamination over  
the whole or large  
parts of the paper  
surface.  
2. Random page contamination. 2. Clean all HV contacts. If the  
(a) Check that the terminals  
(contact points) of the toner  
cartridge and the set are  
clean.  
problem persists replace the  
cartridge.  
(b) Check that the terminals  
(contact points) of the toner  
cartridge and the set are not  
damaged.  
Service Manual  
7-21  
Samsung Electronics  
Troubleshooting  
Fault  
Signs  
Cause & Check  
Solution  
1. For item 1 -  
Run OPC Cleaning Mode Print  
4-5 times repeatedly to remove  
excess toner. Especially check  
for foreign substances on the  
OPC surface Clean with a clean  
gauze moistened with IPA  
1. If light or dark black dots  
occur at regular intervals this  
is because the toner cartridge  
rollers are contaminated with  
foreign substance or paper  
particles.  
(1)38mm interval : Charge  
roller  
(2)95mm interval : OPC cycle  
White Black spot  
• Light or dark black  
dots on the image  
occur periodically.  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
Digital Printer  
• White spots occur  
in the image  
periodically.  
Isopropyl Alcohol) take care not  
to damage the OPC surface.  
2. If white spots occur in a black  
image at intervals of 95mm,  
or black spots occur  
Never use other forms of alcohol.  
2. For Item 2 -  
elsewhere, the OPC drum is  
damaged or foreign  
substance is stuck to the  
surface.  
If running OPC Cleaning Mode  
Print 4-5 times does not resolve  
the problem  
: at intervals of 37.7mm - place  
the toner cartridge.  
3. If a black and white or  
graphic image is partially  
broken at irregular intervals,  
the transfer roller's life has  
been expired or the transfer  
voltage is abnormal.  
: at intervals of 75.5mm – clean  
OPC drum.  
3. For item 3 - Change the transfer  
roller because the life of the  
transfer roller has expired.  
(Check the transfer voltage and  
readjust if necessary.)  
Recycled product • Poor appearance of 1. Poor appearance of the toner  
1. For Item 1 the cartridge is judged  
to be a recycled product -  
(a) If there is any evidence of  
disassembling the toner cartridge.  
(b) If materials other than normal  
parts of the toner cartridge are  
added or substituted.  
the toner cartridge.  
cartridge.  
(a)Check for damage to label  
and if different materials are  
used.  
• Dirty or rough  
printouts.  
(b)Check the appearance of  
parts of the toner cartridge,  
such as frame, hopper, screws  
• Bad background in  
the image.  
2. Clean all HV contacts. If the  
problem persists replace the  
cartridge.  
2. Unclean and rough printouts.  
(a)Check that the terminals  
(contact point) of the toner  
cartridge and the set are clean.  
(b)Check that the terminals  
(contact point) of the toner  
cartridge and the set are not  
damaged.  
Note If the cartridge is judged to be  
recycled then these types of  
problems can occur when the  
toner cartridge is recycled over  
2 times.  
If ‘nearly empty’ cartridges are  
collected for re-use this is  
judged as recycling the toner  
cartridge.  
Service Manual  
7-22  
Samsung Electronics  
Troubleshooting  
Fault  
Signs  
Cause & Check  
Solution  
Ghost & Image  
Contamination  
• The printed image  
is too light or dark,  
or partially  
1. The printed image is too light  
or dark, or partially  
contaminated black.  
1. All of Items 1, 2, 3  
(a) Clean the contacts on the  
toner cartridge.  
contaminated black.  
(a) Check if foreign substance  
or toner are stuck to the  
terminals (point of contact)  
of the toner cartridge or set.  
(b) Check if the terminal  
assembly is normal.  
(b) Clean the contact points on  
the set.  
(c) If the terminal assembly is  
damaged repair or replace  
the terminals in the set or  
replace the cartridge  
• Totally  
contaminated black.  
(Black image  
printed out)  
• The density of  
printouts is too dark  
and ghost occurs.  
2. Totally contaminated black.  
(Black image printed out)  
(a) Check if foreign  
2. In Item 2  
This is particularly related to  
problems with the charge roller  
contact. Pay close attention to  
the charge roller contacts.  
substances are stuck to  
the terminal (point of  
contact) of the toner  
cartridge or set.  
3. In Item 3  
(b) Check if the terminal  
assembly is normal.  
(Especially check the  
charge roller terminal.)  
This is particularly related to  
problems with the developer  
bias voltage contact. Pay close  
attention to the charge roller  
contacts.  
3. The printed image is dark and  
ghost occurs.  
(a) Check if foreign  
substances are stuck to  
the terminal (point of  
contact) of the toner  
cartridge or set.  
(b) Check if the terminal  
assembly is normal.  
(Especially check the  
developer roller terminal.)  
Service Manual  
7-23  
Samsung Electronics  
Troubleshooting  
7.6 Software Problems – Causes and Solutions  
7.6.1 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: using the menu buttons print the  
test page. (Menu, Enter, Enter).  
1. If the test print works that means there are no  
problems in the printer itself. If the test printing does  
not work that means the printer is faulty and the  
problem is not due to computer software or driver  
settings.  
2. Check that the PC and the printer are properly  
connected and that the toner cartridge installed  
correctly.  
2. Replace the printer cable. If the problem is not  
solved even after the cable is replaced, check the  
amount of the remaining toner. (refer to Toner  
Cartridge Service 7-6, Page 7-25)  
3. Printing is not working in the Windows.  
3. Check that the connection between PC and printer  
port are correcct. If you use windows, check that the  
printer driver in the controller is set up correctly set  
up, the correct port is selected and ‘Use On-line’ is  
selected in the driver. If the printer driver is properly  
set up try printing a test page from the driver proper-  
ties. Check in which program printing is not working.  
Try opening ‘Memo Pad’ and printing. If the printer  
is not working in a certain program, adjust the setup  
within that program.  
Sometimes, the printout is normal within the  
Windows basic programs, but it's not working in a  
particular program. In this case, uninstall and re-  
install the new driver. If the printer is not working in  
the Windows basic programs and you are printing  
using the parallel port check the port setting in  
CMOS is on ECP and that the address is IRQ 7  
and 378 (for parallel port 1). Try using USB instead  
of parallel – or vice versa.  
4. Check that the printer cable is directly connected to the  
printer.  
4. If you have other devices that need to share the  
printer port try temporarily disconnecting these  
devices 9and perhaps even uninstalling their dri-  
vers) to ensure the printer works by itself. If you are  
using a USB hub try connecting directly to the back  
of the PC instead.  
Service Manual  
7-24  
Samsung Electronics  
Troubleshooting  
7.6.2 The printer is not working (2)  
After receiving the print command there is no response at all or print speed is low  
due to wrong setup of the environment rather than malfunction of the printer itself.  
• Description  
Check and Cause  
Solution  
1. Ensure you have sufficient free hard disk space for the  
temporary work files created during printing.  
1. Not working with the message 'insufficient printer  
memory' means there is a hard disk space problem  
rather than a printer RAM problem. In this case pro-  
vide more space on 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  
correct. Check that the cable is properly connected  
and if you are using the parallel port check that the  
port settings in CMOS is correct.  
3. Check the parallel-port-related items in the CMOS  
Setup.  
3. For the printer port, Select ECP. SPP and normal  
normal modes support 8-bit data transfer, while  
ECP Mode supports 12-bit data transfer.  
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.  
Service Manual  
7-25  
Samsung Electronics  
Troubleshooting  
7.6.3 Abnormal Printing  
Printing does not work – even after replacing the cable  
Printer does not work at all or strange fonts are printed,  
• Description  
Check and Cause  
Solution  
1. Set up the parallel port using CMOS SETUP.  
1. Ensure that ECP (best) or SPP is selected in the  
CMOS (BIOS) setup.  
2. Printer Driver Error.  
2. Ensure that the correct driver is loaded. Use the  
driver supplied on the CD or downloaded from the  
Samsung web site. DO NOT use the Microsoft  
driver supplied with the Windows operating system.  
If the printer is a GDI or SPL type printer ensure that  
ALL OTHER GDI or SPL drivers are uninstalled as  
Windows allows only 1 of this type of driver to be  
loaded.  
3. Error message “insufficient memory”.  
(The printing job sometimes stops due to insufficient  
virtual memory, this is caused by insufficient space on  
the hard disk.)  
3. Delete any unnecessary files to secure enough  
space on the hard disk and start the print job again.  
Service Manual  
7-26  
Samsung Electronics  
Troubleshooting  
7.6.4 SPOOL Error  
SPOOL (simultaneous peripheral operations online) is the process Windows uses to  
manage print jobs. Jobs are processed and then stored on the hard disk until the printer is  
• Description  
ready to accept them  
Check and Cause  
Solution  
1. Insufficient space on the hard disk in the directory  
assigned for the basic spool.  
1. Delete any unnecessary files to provide more space  
for spool storage.  
2. If previous printing errors were not solved.  
2. There may be files from previous failed print jobs on  
the hard disk with the name in the form ‘*.jnl’.  
Delete these files and Reboot Windows to restart  
the printer.  
3. There may be conflict with other drivers or programs.  
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 the OS are damaged or  
virus infected.  
5 After rebooting the computer, check for viruses,  
restore the damaged files and reinstall the  
application program which is not working properly.  
6. Memory is less than suggested.  
6. Add up more 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 delete in the menu.  
If the job you are deleting is the current job when you delete the job data that has already been transferred to  
the printer’s memory will still be printed. If there is a problem with the printer (out of toner, offline, out of paper  
etc.) the job may take a long time to delete as it must wait for a time out.  
Service Manual  
7-27  
Samsung Electronics  
Troubleshooting  
MEMO  
Service Manual  
7-28  
Samsung Electronics  
Exploded View & Parts List  
8. Exploded Views and Parts List  
8.1 Main Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-2)  
8.2 Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-4)  
8.3 Scanner Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-7)  
8.4 Fuser Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-9)  
8.5 Middle Cover Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-11)  
8.6 Driver Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-13)  
8.7 Cassette Unit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(8-14)  
8
Service Manual  
8-1  
Samsung Electronics  
Exploded View & Parts List  
8.1 Main Assembly  
10  
0
1
11  
2
7
3
2-2  
2-1  
8
8-1  
8-3  
8-2  
5
9
5-1  
5-2  
Frame  
12  
4
5-4  
5-3  
5-4  
5-5  
13  
17  
Toner Cartridge  
16  
15  
14  
6
Service Manual  
8-2  
Samsung Electronics  
EXPLODED VIEW & PARTS LIST  
Main Assembly Parts List  
SA : Service Available  
O : Service available X : Service not available  
No.  
0
Description  
SCX-4100  
SEC.Code  
Q’ty  
SA  
Remark  
1
MEA UNIT-COVER MIDDLE  
MEA UNIT-COVER REAR  
COVER-M_REAR  
JC97-01958A  
JC97-01959A  
JC63-00475A  
JC63-00476A  
JC63-00472A  
JC63-00471A  
JC97-01960A  
JC63-00477A  
JC70-00481A  
JC70-00482A  
JC70-00304A  
JC66-00387A  
JC68-01085J  
6003-000264  
JC97-01914A  
JC59-00018C  
not assign  
1
1
1
1
1
1
1
1
1
1
2
1
1
3
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
O
O
X
SCX-4100  
SCX-4100  
2
2-1  
2-2  
COVER-M_REAR DOOR  
COVER-M_SIDE_L  
X
3
4
5
O
O
O
X
COVER-M_SIDE_R  
MEA UNIT-COVER FRONT  
COVER-M_FRONT  
SCX-4100  
5-1  
5-2  
5-3  
5-4  
5-5  
5-6  
S
ADJUST-M_MANUAL_L  
ADJUST-M_MANUAL_R  
ADJUST RACK-M_MANUAL  
GEAR-RACK PINION  
LABEL(P)-EXTRACT(DEVE)  
SCREW-TAPTITE  
X
X
O
X
X
X
6
7
8
MEA UNIT-CASSETTE_MB  
UNIT-HUMMING_VE LSU  
MEA ETC-TR  
O
O
O
O
O
X
SCX-4100  
8-1  
8-2  
8-3  
ROLLER-TRANSFER  
GEAR-TRANSFER  
JC66-00725A  
JC66-00395A  
JC72-00851A  
JC96-03138A  
JC96-03050A  
JC39-00242A  
3103-001085  
JC92-01594A  
JC97-01792A  
JC61-00601A  
JC44-00072A  
JC44-00073A  
JC39-00240A  
PPR-SPACER-TR  
9
ELA-UNIT-DRIVE  
O
O
O
O
O
O
O
O
O
O
10  
11  
12  
13  
14  
15  
16  
ELA-UNIT-COVER PLATEN  
CBF JARMESS-LSU  
FAN-DC  
PBA MAIN-CONTROLLER  
MEA UNIT-SHIELD ENGINE  
BRACLET-P-INLET  
SMPS-V1, 110V  
110V  
220V  
SMPS-V2, 220V  
17  
CBF HARNESS-ENGINE  
Service Manual  
8-3  
Samsung Electronics  
Exploded View & Parts List  
8.2 Frame Assembly  
Service Manual  
8-4  
Samsung Electronics  
Exploded View & Parts List  
Frame Unit Assembly Parts List  
SA : Service Available  
O : Service available X : Service not available  
No.  
Description  
SEC.Code  
Q’ty  
SA  
Remark  
0
ELA UNIT-FRAME LOWER, 110V  
JC96-03137A  
1
O
110V  
ELA UNIT-FRAME LOWER, 220V  
FRAME-M-BASE  
JC96-03137B  
JC61-00579A  
JC61-00943A  
JC61-00604A  
JC61-00933A  
JC66-00038A  
JC61-00829A  
JC66-00378A  
6107-001163  
JC72-00143A  
JC61-00582A  
JC72-41081B  
JC72-41082B  
JC75-00049A  
JC70-00312A  
JC70-00313A  
JC61-00592A  
JC72-00983A  
JC72-00974A  
JC72-00985A  
JC61-70932A  
JC70-00458A  
JC72-00984A  
JC72-00976A  
JC72-00975A  
JC72-00977A  
JC70-00309A  
6107-001162  
JC66-00526A  
JC72-00382B  
JC66-00598A  
6107-001165  
JC70-00307A  
JC61-00583A  
JC67-00027A  
JC61-00588A  
JC61-00047A  
6107-001165  
JC72-00102A  
1
1
1
1
1
1
2
1
4
2
4
4
4
4
3
1
1
2
1
1
2
1
1
1
1
1
1
1
1
4
1
1
1
1
1
1
1
1
1
O
O
O
O
O
O
X
220V  
1
2
GUIDE-P-PAPER  
3
PLATE-P-SAW  
4
GUIDE-M-TR RIB  
5
GEAR-EXIT F/DOWN  
HOLDER BEARING EXIT F/DOWN  
ROLLER-EXIT F/DOWN  
SPRING-CS  
6
7
O
O
X
8
Spring Exit  
9
PMO-GEAR_EXIT_DRV16  
HOLDER-M-EXIT F/DOWN  
PMO-ROLLER_EXIT,MAIN  
PMO-ROLLER_EXIT,FR  
MEC-TERMINAL  
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  
O
X
X
O
O
O
O
O
O
O
O
O
O
O
O
O
X
IPR-P-TERMINAL CON  
IPR-P-TERMINAL CR  
HOUSING-TERMINAL  
PMO-LOCKER CST  
PMO-ACTUATOR CVR OPEN  
PMO-PLATE GUIDE DEVE_R  
SPRING ETC-GUIDE DEVE  
IPR-P-GROUND_GUIDE PAPER  
PMO-PLATE GUIDE DEVE_L  
PMO-ACTUATOR FEED  
PMO-ACTUATOR EMPTY  
PMO-ACTUATOR MANUAL  
IPR-P-GROUND_EARTH TR  
SPRING-ETC  
O
O
O
O
X
ROLLER-FEED ROLLER 1  
PMO-BUSHING FEED  
ROLLER-FEED  
SPRING-TS  
Spring-act,Manual  
IPR-P-EARTH TRANSFER  
HOLDER-PTL  
O
O
O
O
X
LENS-PTL  
BUSH-M-TR L  
SPRING ETC-TR L HAWK  
SPRING-TS  
X
Spring-act,Feed  
PMO-BUSHING_TR(L)  
O
Service Manual  
8-5  
Samsung Electronics  
Exploded View & Parts List  
Frame Unit Assembly Parts List(Cont.)  
SA : Service Available  
O : Service available X : Service not available  
No.  
Description  
SEC.Code  
Q’ty  
SA  
Remark  
39  
IPR-P-GROUND_FUSER  
JC70-00310A  
1
O
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
SHAFT-FEED IDLE  
BUSH-M-FEED IDLE  
SPRING ETC-TR  
JC66-00527A  
JC61-00585A  
JC61-70958A  
JC70-00335A  
6107-001170  
JC66-00377A  
JC70-00308A  
JC33-00009A  
JC33-00010A  
JC81-01692A  
JC72-00980A  
JC72-00979A  
6107-001167  
JC61-00602A  
JC70-00311A  
JC66-00398A  
6044-000001  
JC66-00394A  
JC66-00396A  
JC61-00718A  
JC61-00836A  
JC81-01693A  
JC61-00586A  
JC66-00399A  
JC61-00593A  
JC72-00982A  
JC72-01231A  
JC61-00587A  
JC61-00591A  
JC97-01788A  
JC66-00393A  
JC72-00978A  
6107-001171  
JC72-00981A  
JC96-03135B  
JC96-03135A  
JC73-40915A  
JC92-01620B  
JC63-00465A  
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
2
3
1
1
1
2
1
1
1
2
2
1
1
1
1
1
1
1
1
1
1
4
1
1
O
O
X
Spring Feed Idle  
IPR-P_GROUND_DRIVE2  
SPRING-TS  
O
O
O
O
O
O
O
O
O
X
Spring-cam Pick-up  
CAM-M-PICK_UP  
IPR-P-GROUND_DRIVE  
SOLENOID-HB (PICK-UP)  
SOLENOID-HB (MANUAL)  
AS-GEAR PICK_UP  
PMO-GEAR PICK_UP B  
PMO-GEAR PICK_UP A  
SPRING-CS  
49-1  
49-2  
49-3  
Spring-Pick-up gear  
50  
BRACKET-P-FEED  
IPR-P-GROUND_TR  
SHAFT-FEED  
O
O
O
X
51  
52  
53  
54  
55  
56  
57  
58  
RING-CS  
GEAR-FEED 2  
O
O
O
O
O
O
O
X
GEAR-IDLE 23  
GUIDE-P-PAPER  
FOOT-FRONT  
AS-PICK UP  
58-1  
BUSH-M-PICK_UP L  
SHAFT-P-PICK_UP  
STOPPER-PICK_UP  
PMO-IDLE PICK_UP  
SPONGE-ROLLER PICK_UP  
BUSH-M-PICK_UP R  
HOUSING-M-PICK_UP  
MEA UNIT-CLUTCH  
GEAR-FEED 1  
58-2  
58-3  
58-4  
58-5  
58-6  
58-7  
O
O
O
O
O
O
O
X
59  
59-1  
59-2  
59-3  
59-4  
PMO-COLLAR_SPRING  
SPRING-TS  
PMO-HUB CLUTCH  
ELA HOU-FUSER_220V  
ELA HOU-FUSER_110V  
RMO-RUBBER EXIT  
PBA MAIN-PTL  
O
O
O
O
X
60  
220V  
110V  
61  
62  
63  
IPR-GROUND_SAW  
X
Service Manual  
8-6  
Samsung Electronics  
Exploded View & Parts List  
8.3 Scanner Unit Assembly  
0
1
2
3
4
5
29  
9
7
9
8
28  
13  
10  
12  
11  
14  
15  
17  
16  
26  
18  
12  
20  
22  
19  
21  
23  
20  
24  
25  
27  
Service Manual  
8-7  
Samsung Electronics  
Exploded View & Parts List  
Scanner Unit Assembly Parts List  
SA : Service Available  
O : Service available X : Service not available  
No.  
0
Description  
UNIT SCAN  
SEC.Code  
JC96-03136A  
Q’ty  
1
SA  
O
Remark  
SCX-4100  
1
COVER-M-PLATEN  
SHEET-WHITE SPONGE  
HINGE PIVOT  
JC63-00454A  
JC63-00209A  
JC61-00929A  
JC63-00452A  
JC01-00002A  
JC39-00358A  
0609-001214  
JC66-00714A  
JC70-00480A  
JC61-00930A  
6003-001064  
JB66-00007A  
JC66-00718A  
JC67-00069A  
JC66-00721A  
6003-000269  
JC61-00952A  
JC31-00035A  
JC61-00941A  
JC66-00713A  
6107-001194  
JC61-00931A  
JC63-00453A  
6003-000269  
6003-000196  
JC63-00459A  
JB39-40532A  
JB68-00644A  
1
1
2
1
1
1
1
2
1
1
2
1
1
1
1
2
1
1
2
1
1
1
1
4
2
1
1
1
X
O
X
X
X
X
O
X
X
X
X
O
X
X
X
X
X
O
X
X
X
X
X
X
X
X
X
X
2
3
4
COVER-M-SCAN UPPER  
GLASS SCAN  
5
7
CBF SIGNAL-CIS FFC  
CIS MODULE  
8
9
SLIDER CIS  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
IPR CARRIAGE-CIS  
HOLDER CIS  
SCREW-TAPTITE  
BELT-SCANNER  
IPR-SHAFT CIS  
CAP PULLEY  
GEAR-M-PULLEY  
SCREW-TAPTITE  
BRACKET SCAN MOTOR  
MOTOR STEP-SCAN  
BRACKET SCAN L  
PULLEY IDLE  
SPRING ETC-BELT  
BRACKET PULLEY  
COVER-M-SCAN LOWER  
SCREW-TAPTITE  
SCREW-TAPTITE  
SHEET SCAN LOWER  
CBF HARNESS-OPE  
LABEL(P)-SHADING  
Service Manual  
8-8  
Samsung Electronics  
Exploded View & Parts List  
8.4 Fuser Unit Assembly  
0
39  
12  
6
9
7
10  
8
S3  
14  
3
38  
33  
31  
11  
35  
4
2
5
34  
S3  
40  
31  
37  
39  
1
32  
16  
32  
39  
40  
19  
13  
S2  
41  
18  
15  
17  
20  
23  
21  
26  
24  
22  
25  
28  
31  
27  
30  
40  
29  
Service Manual  
8-9  
Samsung Electronics  
Exploded View & Parts List  
Fuser Unit Assembly Parts List  
SA : Service Available  
O : Service available X : Service not available  
No.  
Description  
SEC.Code  
Q’ty  
SA  
Remark  
0
ELA HOU-FUSER_220V  
JC96-03135B  
1
O
220V  
ELA HOU-FUSER_110V  
COVER-M-FUSER  
JC96-03135A  
JC63-00478A  
JC61-00584A  
JC61-00064A  
JC72-40361A  
JC61-70976A  
JC47-00005A  
JC72-00143A  
JC66-00396A  
6044-000001  
JC66-00397A  
JC70-00466A  
JC70-00450A  
1404-001298  
JC70-00449A  
JC39-00239A  
JC39-00238A  
JC66-00037C  
JC61-00948A  
JC71-00012B  
JC61-00947A  
4713-001182  
4713-001183  
JC66-00380A  
JC73-00017A  
JC66-00731A  
JC66-10901A  
JC61-00453A  
JC72-00382A  
JC61-00581A  
JC72-00987A  
JC61-00946A  
JC61-00595A  
6107-001165  
6021-000222  
JC68-30928D  
JC61-00605A  
JC63-00521A  
1
1
4
4
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2
2
3
1
1
1
1
1
5
1
4
1
O
X
X
X
X
X
O
X
X
X
O
X
X
O
X
O
O
X
X
O
O
O
O
X
X
O
X
O
X
X
O
X
X
X
X
X
X
X
110V  
1
2
HOLDER-M-PLATE CLAW  
SPRING ETC-CLAW  
PMO-ROLLER EXIT  
SPRING ETC-FUSER EXIT  
THERMOSTAT-150  
PMO-GEAR_EXIT_DRV16  
GEAR-IDLE 23  
3
4
5
6
7
8
9
RING-CS  
10  
11  
12  
13  
14  
15  
GEAR-RDCN 25/15  
ELECTRODE_LAMP2  
ELECTRODE-WIRE_L  
THERMISTOR-NTC  
ELECTRODE-WIRE_R  
CBF HARNESS-FUSER 110V  
CBF HARNESS-FUSER 220V  
GEAR-FUSER  
110V  
220V  
16  
17  
18  
19  
20  
BUSH-M-HR L  
ROLLER-HEAT  
BUSH-M-HR R  
LAMP-HALOGEN_110V  
LAMP-HALOGEN_220V  
ROLLER-M-EXIT F/UP  
RUBBER EXIT  
110V  
220V  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
ROLLER-PRESSURE  
BEARING-PRESSURE/R  
SPRING-ETC-BEARING PR  
PMO-BUSHING TX  
HOLDER-ACTUATOR  
PMO-ACTUATOR_EXIT  
FRAME_FUSER  
GUIDE-M-INPUT  
SPRING-TS  
NUT-HEXAGON  
LABEL(P)-CAUTION, HOT_FUSER  
PLATE-P-CLAW  
COVER-LAMP_L  
Service Manual  
8-10  
Samsung Electronics  
Exploded View & Parts List  
Fuser Unit Assembly Parts List  
SA : Service Available  
O : Service available X : Service not available  
No.  
36  
37  
38  
39  
40  
41  
Description  
WASHER-PLAIN  
SEC.Code  
6031-001051  
JC68-00407A  
6006-001078  
6006-001193  
6603-000269  
6003-000196  
Q’ty  
1
SA  
X
Remark  
LABEL(R)-HV FUSER  
SCREW-TAPTITE  
SCREW-MACHINE  
SCREW-TAPTITE  
SCREW-TAPTITE  
1
X
1
X
5
X
6
X
1
X
Service Manual  
8-11  
Samsung Electronics  
Exploded View & Parts List  
8.5 Middle Cover Unit Assembly  
0
2
5
6
3
4
5
1
7
9
8
10  
11  
12  
Service Manual  
8-12  
Samsung Electronics  
Exploded View & Parts List  
Middle Cover Unit Assembly Parts List  
SA : Service Available  
O : Service available X : Service not available  
No.  
Description  
SEC.Code  
Q’ty  
SA  
Remark  
0
MEA UNIT-COVER MIDDLE  
JC97-01958A  
1
O
1
COVER-M_MIDDLE  
PMO-STACKER  
JC63-00473A  
JC72-01340A  
JC61-00949A  
JC61-00026A  
JC72-01343A  
JC72-00387A  
JC64-00153A  
JC64-00151A  
JC64-00150A  
JC64-00152A  
JC92-01586A  
JC63-00474A  
1
1
1
1
2
1
1
1
1
1
1
1
X
X
X
X
X
O
X
X
X
X
O
X
2
3
STOPPER-M-LEVER  
SPRING ETC-TS-CHARGE APOLLO  
PMO-SUB_M_STACKER  
PMO-BUSHING_F/DOWN  
WINDOW-M LCD  
4
5
6
7
8
KEY-M_START  
9
KEY-M_STOP  
10  
11  
12  
KEY-M_MENU  
PBA SUB-PANEL  
COVER-M-PANEL  
Service Manual  
8-13  
Samsung Electronics  
Exploded View & Parts List  
8.6 Drive Unit Assembly  
0
7
6
8
1
9
HARNESS-MOTOR  
2
4
5
3
4
5
Drive Unit Assembly Parts List  
SA : Service Available  
O : Service available X : Service not available  
No.  
0
Description  
ELA UNIT-DRIVE  
SEC.Code  
Q’ty  
1
SA  
O
O
O
O
O
X
Remark  
JC96-03138A  
JC61-00598A  
JC66-00388A  
JC66-00391A  
JC66-00389A  
6031-000023  
JC61-00599A  
JC66-00390A  
JC66-00392A  
JC31-00020A  
JC72-00825A  
1
BRACKET-P-GEAR 1400  
GEAR-RDCN 53/26  
GEAR-RDCN 113/33  
GEAR-RDCN 57/18  
WASHER-PLAIN  
1
2
1
3
1
4
2
5
2
6
BRACKET-P-MOTOR 1400  
GEAR-RDCN 103/41  
GEAR-RDCN 90/31  
MOTOR STEP 7.5  
1
X
7
1
O
O
O
X
8
1
9
1
10  
PMO-IMPELLER_DRV  
1
Service Manual  
8-14  
Samsung Electronics  
Exploded View & Parts List  
8.7 Cassette Unit Assembly  
0
1
3
2
19  
4
5
6
7
9
11  
12  
20  
8
10  
14  
16  
15  
13  
17  
18  
Service Manual  
8-15  
Samsung Electronics  
Exploded View & Parts List  
Cassette Unit Assembly Parts List  
SA : Service Available  
O : Service available X : Service not available  
No.  
Description  
SEC.Code  
Q’ty  
SA  
Remark  
0
MEA UNIT-CASSETTE_MB  
ADJUST-M-CASSETTE_L  
ADJUST-M-CASSETTE_R  
GEAR-PINION  
JC97-01914A  
JC70-00300A  
JC70-00301A  
JG66-40003A  
JC70-00314A  
JC73-00140A  
JC63-00290A  
JC61-00580A  
JG61-70531A  
JC61-00603A  
6107-001166  
JC72-00971A  
JC61-00918B  
JC61-00876A  
JC72-00972A  
JC61-70911A  
JC66-00529A  
6107-001047  
JC61-00944A  
JC66-00719A  
JC73-00141A  
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2
2
1
1
1
O
O
O
O
O
O
X
O
O
X
X
O
X
X
O
X
O
X
X
X
X
1
2
3
4
IPR-PLATE PAD  
5
RPR-FRICTION PAD  
SHEET-HOLDER PAD  
HOLDER-M-PAD  
6
7
8
SPRING ETC-LOCKER,PLATE  
PLATE-P-KNOCK_UP  
SPRING-CS  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
PMO-EXTENSION SMALL  
GUIDE-M-EXTENSION L2  
FRAME-M_CASSETTE  
PMO-PLATE_LOCKER  
SPRING ETC-EXIT ROLL FD  
ROLLER-M-IDLE FEED  
SPRING-ES  
GUIDE-M_CASSETTE  
CAM-M-KNOCK_UP  
RPR-PAD CASSETTE  
Service Manual  
8-16  
Samsung Electronics  
Block Diagram  
9. Block Diagram  
9
Service Manual  
9-1  
Samsung Electronics  
Connection Diagram  
10. Connection Diagram  
10  
Service Manual  
10-1  
Samsung Electronics  

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