Samsung SCX-4521F Service Manual

Reference Information

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11. Reference Information

This chapter describes the reference information for applying this training manual, and it is consist-ed
of the tool list, the abbreviation table, the outline of model, and so on.

11.1 Troubleshooting Tool

The following tools are recommended safe and easy troubleshooting as described in this service manual.

• DVM(Digital Volt Meter)

Standard : Indicates more than 3 digits.

• Driver

Standard : "-" type, "+" type (M3 long, M3 short, M2

long, M2 short).

• T weezers

Standard : For general home use, small type.

• Cotton Swab

Standard : For general home use, for medical service.

• Cleaning Equipments

Standard : An IPA(Isopropyl Alcohol)dry wipe tissue or

a gentle neutral detergent and lint-free cloth.

• Vacuum Cleaner

• Spring Hook

Standard : For general use

• Software (Driver) installation CD ROM

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11.2 Acronyms and Abbreviations(1)

The table below explains the abbreviations and acronyms used in this service manual. Where abbreviations
or acronyms are used in the text please refer to this table.

Abbreviations Explanation

AP Access Point
AC Alternating Current
APC Auto Power Control
ASIC Application Specific Integrated Circuit
ASSY assembly
BIOS Basic Input Output System
BLDC Brush-less Direct Current
CMOS Complementary Metal Oxide Semiconductor
CN connector
CON connector
CPU Central Processing Unit
dB decibel
dbA decibel A
dBM decibel milliwatt
DC direct current
DCU Diagnostic Control Unit
DPI Dot Per Inch
DRAM Dynamic Random Access Memory
DVM Digital Voltmeter
ECP Enhanced Capability Port
EDC Embedded Diagnostic control
EEPROM Electronically Erasable Programmable Read Only Memory
EMI Electro Magnetic Interference
EP electrophotographic
EPP Enhanced Parallel Port
FPOT First Printout Time
F/W firmware
GDI graphics device interface
GND ground
HBP Host Based Printing
HDD Hard Disk Drive
H/H High temperature and high marshy place
HV high voltage
HVPS High Voltage Power Supply
I/F interface
I/O Input and Output
IC integrated circuit
IDE Intelligent Drive electronics or Imbedded Drive Electronics

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Acronyms and Abbreviations(2)

Abbreviations Explanation

IEEE Institute of Electrical and Electronics Engineers. Inc
IP A Isopropy Alcohol
IPM Images Per Minute
LAN local area network
lb pound(s)
LBP Laser Beam Printer
LCD Liquid Crystal Display
LED Light Emitting Diode
L/L Low temperature and low marshy place
LSU Laser Scanning Unit
MB megabyte
MHz megahertz
MPF Multi Purpose Feeder
NIC Network Interface Card
N/N Normal temperature and normal marshy place
NVRAM nonvolatile random access memory
OPC Organic Photo Conductor
OPE Operate Panel Equipment
PBA Printed Board Assembly
PCL Printer Command Language , Printer Control Language
PDL Page Discription Language
PPM Page Per Minute
PPS Pulse Per Second
PS Post Script
PTL Pre-Transfer Lamp
PWM Pulse Width Modulation
Q-PID Quick Printer Initiating Device
Q ty quantity
RAM Random Access Memory
ROM Read Only Memory
SCF Second Cassette Feeder
SMPS Switching Mode Power Supply
SPGP Samsung Printer Graphic Processor
SPL Samsung Printer Language
Spool Simultaneous Peripheral Operation Online
SW switch
sync synchronous or synchronization
USB Universal Serial Bus
WECA Wireless Ethernet Compatibility Alliance

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11.3 Selecting printer locations

• Leave enough room to open the printer trays, covers, and allow for proper ventilation. (see diagram
below)

• Provide the proper environment :

- Afirm, 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

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11.4 Sample Tests Patterns

The sample patterns shown below are the standard test patterns used in the factory.
The life of the toner cartridge, developer cartridge and printing speed are measured with the pattern shown
below. The A4 ISO 19752 standard pattern samples are reproduced reduced to 70% of the actual A4
size.

A4 ISO 19752 Standard Patterns

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3. System Overview

3.1 System Layout

The SCX-4521F/4321 is roughly made up Main Control part, Operation Panel part, Scanner part, Line
Interface part and Power part. Each Part is separated Module which focus on common and standard design
of different kind products. main control part adopting Fax & LBP Printer exclusive Controller is chorus2
CPU(ASIC) and 1 Board. Scanner part is composed of ADF and Platen and is connected with Main by
Harness.

ADF ROLLER

Scanner part

Engine Part

ADF-UPPER

PICK-UP ROLLER

EXIT ROLER

WHITE BAR

ADF-GLASS

FEED ROLLER

SCAN UPPERSCAN UPPERSCAN UPPER

ADF-LOWER

COVER OPEN

BIN PATH

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3.1.1 Feeding section

There is a universal cassette which automatically loads paper and the 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: MP Cassette Type

- Feeding Standard: Center Loading

- Feeding Capacity: Cassette-150 sheets (75g/m2, 20lb paper standard)
Manual 1 sheet (Paper, OHP, Envelop, etc.)

- Paper detecting sensor: Photo sensor

- Paper size sensor: None

3.1.2 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 50,000 sheets (at 16~30°C)

3.1.3 Driver Ass’y

- Gear driven power unit. The motor supplies power to the paper feed unit, the fuser unit, and the toner
cartridge.

3.1.4 Fixing Part(Fuser)

- The 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.

3.1.4.1 Temperature-Intercepting Device (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.

3.1.4.2 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.

3.1.4.3 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.

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3.1.4.4 Pressure roller

The Pressure Roller mounted under the heat roller, it is made of a silicon resin, and the surface of the roller
is coated with Teflon. This ensures that toner does not adhere to the roller surface.

3.1.4.5 Safety Features

• 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 80°C to protect the user and a
caution label is attached where the customer can see it easily when the rear cover is opened.

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STACKER

COVER-M-SIDE R

EXTEND-SMALL

EXTEND-LARGE

TRAY CASSETTE

COVER-M_DEVE

FIXING BKT

SPEKER

COVER-M-SIDE-L

COVER-M_REAR

COVER-M_JAM

COVER-M_MIDDLE

SCAN

UPPER

MOTOR

ASS’Y

SCAN

LOWER

TIMING

BELT

CIS

SLIDER

-CIS

ADF

GLASS

SCAN

GLASS

KEY & OPE

COVER

[Case part figure]

[Scan part figure]

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3.2 Engine H/W Specification

1) Recording Method : LSU(Laser Scanning Unit)

2) Printing Speed : 20ppm
(In continuing printing base Letter, printing pages from 2nd to last during 1min)

3) Recording Density : 600 dpi

4) Cassette Capa. : Cassette ; 150sheets(75g/ Base), 1-sheet Feeding : N/A((DRIVE Selection : Paper, OHP,

Envelop - 1 sheet)

5) Manual Tray : All paper 1 sheet

6) Paper Size : Cassette ,Manual ; Width = 76 ~ 216mm, Length = 125mm ~ 356mm

7) Effective recording size

- A4 :202 x 291 mm

- Letter :208 x273mm

- Legal : 208 x 350 mm

- Folio : 208 x 325 mm

- TopMargin: 2 2 mm

- Left, Right Margin : 2

2 mm

8) CRU(Toner Cartridge)Life : 3,000pages Printing(A4, ISO 19752 Standard Pattern Printing)

9) First Print Out Time : within 11sec ( Standby )

10) Warming up time : within 35sec (Ambient : 25 °C)

3.2.1 Main Board Control Part

Main control part of SCX-4521F is made of ASIC(CPU, Image processor, PC I/F part include, Scan interface part,
FAX Modem part and Printing process I/F part. CPU handles the BUS control, I/O interface, scan interface, PC
interface and other miscellaneous driver circuit.

1) Main Board

- Main Board has a function of sending Current Image Video Data to LSU of the machine, controlling motor
Driving Circuit and monitoring Paper Exit Sensor, Cover Open switch, OPE Panel Inputs.

2) Main Controller

- CPU : Chorus2 is the main CPU and is made up on the 16/32bit RISC architecture using ARM7TDMI

core. Main CPU controls the whole system according to the program code which stored in the
Flash-ROM memory.

- Summary of the Key Function Block:

1.8V for internal Core, 3.3V for I/O Pad with 4KByte Cache.
Image Processor included.
On-Chip clock generator with PLL.
Memory and External Bank Control.
DMA Control (5-Channel)
Interrupt Control.
2-port USB Host/1-port USB device(ver 1.1) interface control.
Parallel interface control.
UART(2-Channel)

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Synchronous Serial Interface Control.
A/D Converter(10-bit, 2channel).
General I/O Port control.
Tone Generator.
RTC with calendar function.
S/W Assistant function(Rotator)

- Flash Memory : Stores system program and can be updated to the newer system program code through
the PC interface. It stores the FAX Journal List, One Touch dial number, speed dial number, and machine
configuration setup data.

Capcity : 2 Mbyte
Access Time : 70 nsec

- SDRAM : SDRAM is used for Print Buffer, Scan buffer when scanning, ECM Buffer when FAX Receiving,
and system working memory.

Capacity : 16 Mbyte
Access Time : 66MHz based on system bus clock.
Data Backup : 72 Hours
Backup Battery Charging Time : 100hours when completely discharged.

3.2.2 Scan Part

1) Image Signal Input Part

- Image Signal from CIS has a level of about 1.2V and is goes to ADC of Chorus2.

After ADC, CIS analog signal will be converted to 8-bit Digital signal.

2) Image Processing

- On the surface of the original paper, the light from the CIS LED reflected and goes to the CIS Sensor.
Then the light is converted to the appropriate voltage suitable for ADC input. Analog signal from CIS
sensor is used for ADC input then is converted to 8-bit digital data. Image processor of the Chorus2 will
do the Shading correction function at first, then Gamma correction function next. After then, the data goes
to different module according to the copy or FAX resolution mode. When Text mode, the image data
goes to LAT module, when Photo mode, the image data goes to Error Diffusion module, when PC-Scan
mode, the image data goes directly to the PC through DMA access.

Summary of the Image sensor interface is as below;

- Minimum Scan Line Time :1.5ms

- Scan Resolution : 600*600 dpi

- Scan Width : 208mm

- Function
White Shading Correction
Gamma Correction
CIS Interface
256 Gray Scale

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3) CIS Driving Part

- CIS Supply Voltage : +3.3V

- CIS Max frequency : 5MHz

- CISLinetime
Fax/Copy - 1.5ms
PC-Scan - 4.5ms

- White output volt. : Max 0.8V

4) ADF Driving Part : Driving ADF Stepper motor, and the maximum motor speed is 2000PPS.

- MOTOR DRIVER : A3978(Allegro)

- Driving Voltage : 24V DC

- Phase : 2-2 Phase 2000PPS at Quick Scan,

2-2 Phase 1000PPS AT Fine Scan,
2-2 Phase 667PPS AT Super Fine Scan

3.2.3 Fax Modem Part

1) Modem Part
The modem part is consist of FM336(FAX Modem chip), LIU(Line Interface Unit) and modem analog front
end(AFE) functional part.

- The feature of the FM336 modem chip is as below;

Communication Mode : Half Duplex
Modem Method

GROUP 3 : ITU-T V34, V17, V29, V27ter
Tonal Signal : ITU-T T.30
Binary Signal : ITU-T V.21, T.30

Image Transmission Time : 3sec ( ITU-T NO.1 CHART/Memory Tx/ECM )
Data Compress : MH, MR, MMR, JPEG
Modem Speed : 33600 / 28800 / 14400 / 12000 / 9600 / 7200 / 4800 / 2400 bps
Receive Level : 0 ~ -48dBm
Output Level

Adjustable : -6 ~ -15dBm ( 1dBm Step )
Initial Setting : -12dBm

Receive dynamic range:

0 dBmto-43 dBmfor V.17,V.29,V.27 ter and V.21

-9 dBm to -43 dBm for V.34 halfduplex

2) The Gain of the Line signal can be adjusted by setting the register value of the FAX modem chip ,Tx and Rx path
is almost directly connected to the impedance matching transformer of the LIU.

- Adjust Tx Level within Setting Level+0,-2dB range.

- Adjust Rx Level that has the same level as the TIMS out level if possible, and must not exceed the TIMS
out level.

3) Speaker Driving Part
Analog Switch(MC14053BD) makes a path for FAX Tone, Ring, Key click sound and Analog MUX
(MC14051) makes a different signal level so that the the Speaker driver chip(MC34119) can driving the
Speaker with different sound volume.

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3.2.4 Printing Process Part

Printing Process part is made of PC-Interface part, PVC(Priter Video Controller), LSU control part, High Voltage
control part and Fuser Unit control part. PC-interface core is included in the Chorus2 ASIC and controls the PC­interface. LSU control part controls the LSU polygon motor, Laser diode, video data output so thatthe printing image
can be made up on the OPC Drum.

3.2.5 Line Interface Part

Line interface part helps the machine connect to the PSTN or PABX Line and is made of almost primary circuit.
Its main function is Line connection, Line state monitoring and TAD interface that enables a extension telephone or
TAD machine to connect to the SCX-4521F machine.

3.2.6 Engine Paper Feeding

1) Feeding Type : MP Cassette Type

2) Feeding Standard : Center Loading

3) Feeding Qty : Cassette 150 sheets (75g/ , 20lb paper standard)

4) 1 sheet (Paper, OHP, Envelope etc.)

5) Separating Type: Cassette - Friction Pad Type

6) Manual Tray : 1 sheet

7) Driver Type : Driving by Gearing from Main Motor

8) Pick_up Roller Driver : Solenoid

9) Pick up Roller Rubber Material : EPDM+IR =1.3 or more

10) Pick up Velocity : 94.8731mm/Sec (Process : 93.0667mm/sec)

11) Paper detecting Sensor : Photo Sensor

12) Paper Size Sensor : None

13) Paper Separating Pad Material : NBB 52 °, =0.8~1.2

14) Separating Pad Pressure : TBD 150 gf

15) Pick_up Roller RPM : 47.683 RPM

16) Feeding Pressure (Same as Transfer Roller)

17) Paper Exit Type : Face Down

18) Feed Roller Force : TBD Kg.f or more.

19) Spring Feed Tensile Force : TBD gf

20) Feed roller Velocity : mm/sec

21) Feed Roller Material

22) Exit Sensor : Photo Sensor

OPC Drum

Photo Diode

LD Driver circit

Protector panel

LD(Laser Diode)

Polygon Mirror

Polygon Motor

Motor Driver

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3.3 Deverope Process

- Developing Method : Non magnetic 1 element contacting method

- Toner : Non magnetic 1 element shatter type toner

- Toner Qty:35gf /60gf (1k/3k)

- The life span of toner 1k/3k sheets (ISO 19752 Standard Coverage )

- Toner Residual Sensor : None

- OPC Cleaning : Use the conventional cleaning blade

- Handling of wasted toner : Discard by collecting waste-toner at waste-toner bin.

- OPC Drum Protecting Shutter : None

- Classifying device for toner cartridge: ID is classified by interruption of the frame channel.

- Development Roller type : conductive elastic roller

- Doctor BLADE Type : Regulating toner layer by pressure

- Charge Roller Type : Conductive Roller Contact-Charge

3.3.1 Fuser Specification

1) Heat Lamp

- Heat Lamp Terminal Shape : Terminal Single Type

- Voltage 120 V : 115 5 %, 220 V : 230 5 %

- Capacity : 600 Watt 30 W

- Light Qty Distribution : 140%

- Life : 3000 Hr

2) Thermostat

- Thermostat Type : Non-Contact type THERMOSTAT

- Control Temperature : 150°C 5°C

3) Thermistor

- Thermistor Type : HF-R0060 (SEMITEC 364FL Type)

- Temperature Resistance : 7 k (180 °C)

- SYSTEM Temperature SETTING

Stand by : 165 5°C
Printing : 175 5°C(5 minutes before)

170°C

5°C(5 minutes after)
Overshoot: 200°C or less
Overheat :210°C or less

4) Safety Relevant Facts

- Protecting device when overheating
1st protecting device : H/W cuts off when detecting an overheating
2st protecting device : S/W cuts off when detecting overheating
3st protecting device : Thermostat cuts off the power

- Safety device
The power of Fuser is cut-off after front cover is open.
The overheating safety device for customer
The surface temperature of the Fuser Cover is under 80°C

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3.4 Sanner Part

600dpi Color CIS Module for Flat bed, SCX-4521F uses the CIS scanning method

1) CIS SPEC

- Scanning size : 216 mm ( width for letter-size)

- Light source : LED

- Scanning sensor: CIS 600/300 dpi

- Scanning mode : Color SCAN / Mono SCAN

- MTF : 30% (300 dpi Chart)

- CIS interface : Analog output

- Power supply : 3.3V

- Clock Frequency: 5MHz max.

- Number of output : 1

- LED Current : Red/Green/Blue : 60mA

- Clamp Level : 1.1V

- Connection : 12 pin FFC connector (pitch 1.0mm)

2) Scan Resolution
(a) Transmission

- Normal : Vertial: 3.85 Line/mm, Horizontal: 8 Pels/mm :203 x 98dpi

- Fine : Vertial: 7.7 Line/mm, Horizontal: 8 Pels/mm :203 x 196dpi

- Super Fine : Vertial: 11.8 Line/mm, Horizontal: 11.8 Pels/mm ;300 x 300dpi

(b) When Copy : Vertial: 11.8 Line/mm, Horizontal: 23.6 Pels/mm :600x300dpi(ADF)

Vertial: 23.6 Line/mm, Horizontal: 23.6 Pels/mm :600x600dpi(Platen)

3) Half Tone (Gray Scale) : 256 Levels

4) Scan Line Time
(a) Tx

- Normal : 1.5 ms/Line

- Fine : 1.5 ms/Line

- Super Fine : 1.5 ms/Line
(b) Copy : 1.5 ms/Line
(c) Scan

- Color : 4.5msec/line

- Gray : 4.5msec/line

- Mono : 4.5msec/line

5) Scanning Width

- MAX SCAN WIDTH : 216 mm (8.5 inches)

- Effective Scan Width: 208mm

6) ADF Motor
(a) Motor Spec

- : 24VDC

- : 0.6A(Peak)

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7) Motor Driver speed & method
(a) FAX Transmission

- Normal Mode : 2000 pps

- Fine Mode : 1000 pps

- Super Fine Mode : 667 pps

(b) Copy Job : 667 pps, 2-2

- max(30sheets) : 50gf

- min(1sheets) : 20gf

8) Document Detect sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED - max current : 50mA

- max voltage : 3.3V

(d) Output - Logic "H" : No Paper

- Logic "L" : Paper

(e) Lever-Sensor DOC : ADF Lower Torsion Spring

9) Regi Detect sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED - max current : 50mA

- max voltage : 3.3V

(d) Output - Logic "H" : No Paper

- Logic "L" : Paper

(e) Lever-Sensor DOC : ADF Lower Torsion Spring

10) Document Scan sensor
(a) Type : Photo interrupt
(b) Position : ADF PBA
(c) LED : - Max current : 50mA

- Max Voltage : 3.3V

(d) Output - Logic "H" : Off(No Position), No Paper

- Logic "L" : On (Doc Position), Paper

(e) LEVER - SENSOR SCAN : Scan Lower Torsion Spring

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3.5 OPE(Operational Panel Equipment)

1) Ope Panel
OPE Panel has a MICOM Chip on it and communicates with Main CPU using Serial communication
Line(SIO). OPE Panel consists of Micom, Key Matrix Part, LED Driving Part and LCD Part.

2) Key Description

3) LCD Part

- Number of Characters : 16 Characters x 2 line

Clock, Date display
System Status display
Alarm, Error Message display
Function Dialog Message display

No Part Feature Function

1 Common 3*4Key Dialing and Option Input

Start Starting Fax/Copy Job
Stop/Clear Cancel Current Job/Return to default
Menu Option select
Upper Level Return to upper level menu
Enter Option select/Execute

Next menu or Next option item

Previous menu or Previous option item
2 Save Toner Save TONER SAVE MODE select
3 Copy Reduce/Enlarge Select ZOOM ratio when copy

No.of Copies Select the number of copies
Original Type Change Copy Modes(Text,Text/Photo,Photo)
Darkness

Change the Darkness of the Copied image (Light/Normal/Dark)

Favorite Copy Select one of the predefined Copy templates.

4 Fax Resolution STANDARD>FINE>SUPER

FINE>PHOTO>COLOR

Phone Book Search the user defined Phone number.
Broadcasting When sending FAX data to many place in the same time.
On Hook Dial On Hook Dial
Redial / Pause Last number Redial / Pause

5 Scan Scan to select [scan to PC], [scan to FAX], [scan to E-mail] function.

U1

U3

12.0MHz

U8

U9

U12

U10

U7

U5

(IC-DRAM/

512K x 16Bit)

(IC-POSI, ADSUST REG)

(IC-CMOS LOGIC, INVER TER)

(IC-MOTOR DRIVER)

(IC-VOLTAGE COMP)

(IC-CLOCK GENERATOR)

(IC-EEPROM/256x12Bit)

(IC-POSI, FLXED REG)

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3.6 SMPS & HVPS

It is the power source of entire system. It is assembled by an independent module, so it is possible to use for
common use. It is mounted at back of the machine. Power part is divided by two independent PBAs - SMPS PBA
and HVPS PBA. SMPS PBA supplies the DC power for driving the system and supplies the AC power to the fuser.
SMPS has two output channels : +5V and +24V. HVPS PBA supplies High voltage to the developer part to make a
printing image on the paper. High voltages applied to the MHV, THV, DEV, SUPPLY.

3.6.1 SMPS

1) AC Input

- Input Rated Voltage : AC 220V ~ 240V / AC 110V ~ 127V

- Input Voltage fluctuating range: AC 180V ~ 270V / AC 100V ~ 135V

- Rated Frequency : 50/60 Hz

- Frequency fluctuating range : 47 ~ 63 Hz

- Input Current : Under 4.0Arms / 2.5Arms
(But, the status when lamp is off or rated voltage is inputted/outputted )

2) Rated Output Power

3) Consumption Power

NO Items CH1 CH2 Remarks

1 CHANNEL +5V +24.0V
2 CONNECTOR PIN CON 2 CON 2 Jam cover switch

5V PIN : #5pin 24V PIN: #2, #3, #4 included
GND PIN: #6pin GND PIN: #7pin

3 Rated Output +5V ± 5%(4.75 ~ 5.25V)

+24V -10%/+15%(21.6V ~ 27.6V)
4 Max. Output current 0.8 A 2.5 A
5 Peak Loading current 1.0 A 2.7 A

within 1ms Duration
6 RIPPLE NOISE Voltage 100mVp-p or less 500mVp-p or less
7 Maximum output 2.5W 36W
8 Peak output 4W 55.2W 1ms
9 Protection for loading Fuse Protection or Shutdown Fuse Protection or Shutdown

shortage and within 1.5A ~ 3.0A range. within 3.5A ~ 4.5A range.
overflowing current

NO Item CH1(+5V) CH2(24V) System

1 Stand-By 0.6 A 1.3 A AVG : 65Wh
2 Printing 0.8 A 1.9 A AVG : 350Wh
3 Sleep-Mode 0.5 A 0.3 A AVG : 10Wh

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4) Power Cord Length : 1830 50mm

5) Power Cord Switch : Exist

6) Feature

- Withstand Resistance : 100 or more (at DC 500V)

- Insulating revisiting pressure : Must be no problem within 1 min. (at1000Vac,10mA)

- Leaking Current : under 3.5mA

- Running Current : under 40A PEAK (AT 25 °C,COLDSTART)
under 50A PEAK (In other conditions)

- Rising Time : within 2Sec

- FallingTime : over 20ms

- Surge : Ring Wave 6KV-500A (Normal, Common)

7) Environment Condition

- Operating temperature range : 0 °C ~ 40 °C

- Maintaining temperature range : -20 °C ~ 40 °C

- Preserving Humidity Condition : 10% ~ 90% RH

- Operating atmospheric pressure range : 1atm

8) EMI Requirement : CISPR, FCC, CE, MIC,

9) Safety Requirement : IEC950 UL1950, CSA950, C-UL, Semko, EK, CB, CCC(CCIB),GOST, EPA,

3.6.2 HVPS Board

The HVPS board creates the high voltage of THV/MHV/Supply/Dev and supplies them to the developer part for
making best quality printing image. The HVPS part takes the 24V and outputs the high voltage such as
THV/MHV/Supply/Dev, and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller.

(a) Transfer High Voltage (THV+)

- Input Voltage : 24 V DC +15% / -10% (21.6V~27.6V)

- Out Voltage : +1300KV 1.5% (200 Load )

- Out Voltage Trigger : 6.5

- Input Voltage Variation : 5 %

Load Variation :

5 %

- Out Voltage Rising Time : 100 ms Max

- Out VoltageFalling Time : 100 ms Max

- Transfer Variation Voltage on Environment Variation : +500 V ~ +5000V

- Control Method on environment : THV-PWM ACTIVE, transfer Active signal, of environment sensing

voltage is input and get feed back current, and recalculate it to resistance .

- Control method on transfer output voltage : It is controlled by changing its duty of THVPWM Signal as

follows. 10% Duty : +500V, 90% Duty : +5000V

(b) Charge Voltage (MHV)

- Input Voltage : 24 V DC +15% / -10% (21.6V~27.6V)

- Out Voltage : -1300KV 50V(50 Load)

- Out Voltage Rising Time : 50 ms Max

- Out VoltageFalling Time : 50msMax

- Out Voltage Range : 30 ~ 1000

- Output Control Signal(MHV-PWM) : Active Low PWM signal for controlling MHV

System Overview

Samsung Electronics

Service Manual

3-15

(c)Developing Voltage (DEV)

- Input Voltage : 24V DC +15% / -10% (21.6V~27.6V)

- Output Voltage: -350V 20V (50 Load)

- Output Voltage Fluctuation range: PWM Control

- Input contrast of the output stability degree : 5 %orless

- Loading contrast : 5 %orless

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 10 ~1000

- Output Control Signal (BIAS-PWM) : Active Low PWM signal for controlling MHV

(d) Supply

- Output Voltage : -550V 50V(50 Load)

- Input contrast of the output stability degree : under 5 %

- Loading contrast : 5 %orless

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 10 ~ 1000

- Output Control Signal (BIAS-PWM) : Active Low PWM signal for controlling MHV

3.7 FUSER AC POWER CONTROL

The Fuser(HEAT LAMP) gets heat from AC power. The AC power controls the switch with the Triac, a
semiconductor switch. The 'ON/OFF control' is operated when the gate of the Triac is turned on/off by Phototriac
(insulting part). In other words, the AC control part is passive circuit, so it turns the heater on/off with
taking signal from engine control part.
When the 'HEATERON' signal is turned on at engine,the LED of PC102 (Photo Triac) takes the voltage and
flashes. From the flashing light, the Triac part (light receiving part) takes the voltage,and the voltage is supplied to
the gate of Triac and flows into the Triac. As a result, the AC current flows in the heat lamp, and heat is occurred.
On the other hand, when the signal is off, the PC102 is off, the voltage is cut off at the gate of Triac, the Triac
becomes off, and then the heat lamp is turned off.

1) Triac feature : 12A, 600V SWITCHING

2) Phototriac Coupler (PC102)

- Turn OnIf Current : 15mA~50mA(Design : 16mA)

- High Repetive Peak Off State Voltage : Min 600V

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-1

5

5. Disassembly and Reassembly

5.1 General Precautions on Disassembly

When you disassemble and reassemble components, 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 removing any component from the machine, note the cable routing that will be affected.

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.

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.

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-2

5.2 MP Tray

1. Open the Front Cover.

2. Release the Toner Cartridge.

3. Hold the MP Tray and pull it to the arrow direction.

Front Cover

MP Tray

Toner Cartridge

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-3

5.3 Pick Up Roller

1. Before you remove the Pick Up Roller, you should
remove:

- MP Tray (Refer to the 5.2)

2. To exchange Pick Up Sponge, pull part Pick Up
Housing U while pressing the hook on the both
side the Pick Up Housing B.

Housing B

2

1

Housing U

Sponge

5.4 Front Cover

1. Open the Front Cover. 2. To remove the Front Cover, first pull the part below
the right side of the Front Cover with a light pressure
to the direction of arrow(left).

Front Cover

2

1

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-4

5.5 Cassette Tray

1. Open the Cassette Tray. 2. As shown below, to remove the Cassette Tray, lift

the nob to the direction of the arrow with a light
pressure while holding the Set(left).

1

Cassette Tray

2

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-5

5.6 Rear Cover

1. Remove the four screws securing the Rear Cover

and remove it.

2. Open the Jam Cover.

3. To remove the Rear cover make sure the right
Power Switch doesn't get jammed to the Rear
Cover, as shown below.

4. If necessary, remove the Jam Cover in the direction
of arrow, as shown below.

Rear Cover

Jam Cover

Jam Cover

Rear Cover

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-6

5.7 Right Cover

1. Before you remove the Right Cover, you should
remove:

- Front Cover (Refer to the 5.4)

- Rear Cover (Refer to the 5.6)

2. Remove the one screws securing the Right Cover.

3. Apply light pressure to the back of the Right Cover
and pull it to the right side in the direction of arrow,
as shown below.

Right Cover

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-7

5.8 Left Cover

1. Before you remove the Left Cover, you should
remove:

- Front Cover (Refer to the 5.4)

- Rear Cover (Refer to the 5.6)

2. Remove the one screws securing the Left Cover.

3. Apply light pressure to the back of the Left Cover
and pull it to the leftt side in the direction of arrow,
as shown below.

4. Unplug the Speaker Connector from the Main PBA.

5. If necessary, remove the two screws securing the
Speaker and remove it.

Speaker

Left Cover

Left Cover

Fixing Bracket

Speaker

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-8

5.9 Scan Ass'y

1. Before you remove the Scan Ass'y, you should
remove:

- Rear Cover (Refer to the 5.6)

- Right Cover (Refer to the 5.7)

- Left Cover (Refer to the 5.8)

2. Remove the two screws from the Middle Cover and
remove the screw securing the Ground Cable.

3. Unplug the three Connectors(ADF, Scan Motor,
OPE) and Flat Cable-CIS, as shown below.

4. Release the Scan Ass'y in the direction of arrow, as
shown below.

Middle
Cover

Middle
Cover

Scan Ass’y

ADF

Flat
Cable

OPE

Scan
Motor

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-9

5.10 ADF Housing

1. Before you remove the ADF Housing, you should
remove:

- Scan Ass'y (Refer to the 5.9)

2. Open the ADF Housing and insurt a flat-blade
screwdriver into the slot as shown below, and
remove the Cap-Hinge from the Platen Housing
and ADF Housing.

3. Remove the ADF Housing from the Platen
Housing. At that time, carefully release the ADF
Motor Harness from the Platen Housing, as shown
below.

4. Remove the two screws securing the ADF Ass'y
and remove it. At that time, carefully release the
ADF Motor Harness from the Platen Cover, as
shown below.

5. If necessary, remove the two screws securing the
TX Stacker Ass'y and remove it, as shown below.

Cap-Hinge

ADF Ass’y

ADF Motor Harness

ADF Housing

Scan Motor
Harness

TX Stacker Ass’y

Platen Cover

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-10

6. Open the Open Cover and remove the Open
Cover in the direction of arrow, as shown below.

7. Pull the Bush, then rotate until it reaches the slot,
as shown below. Then lift the Pick Up Unit.

8. Remove the two screws securing the ADF Upper
and insurt a flat-blade screwdriver in to slot as
shown below, and remove the ADF Upper.

9. Unplug the Connector from the ADF PBAand
remove the four screws securing the ADF Motor
Housing and remove it in the direction of arrow, as
shown below.

Open Cover

2

1

2

ADF Upper

ADF Lower

1

ADF Motor Housing

Bush

2

Pick Up Unit

Bearing

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-11

5.11 OPE Unit

* Please refer to this procedure when you disassemble

and assemble the SCX-4321.

1. Open the ADF Housing and insurt a flat-blade
screwdriver into the crack as shown below, and
remove the OPE Unit from the Platen Housing.

2. Unplug the three Connectors(Battery, OPE, Full
Sensor), as shown below.

3. Remove the five screws securing the OPE PBA
and remove it.

4. Release the Contact Rubbers, as shown below.

5. Release the Keys, as shown below.

OPE

ADF Housing

2

1

OPE PBA

Rubber-Scroll

Rubber-Tel

Battery

OPE

Full Sensor

OPE PBA

Resolution

Copy

Scroll

OPE Cover

Start

Stop

Tel

FAX

Toner Save

Scan T o

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-12

5.12 Platen Housing

1. Before you remove the Platen Housing, you should
remove:

- Scan Ass'y (Refer to the 5.9)

- ADF Housing (Refer to the 5.10)

- OPE Unit (Refer to the 5.11)

2. Remove the five screws from the Scan Upper and
remove it from the Scan Lower, as shown below.

3. Take out the Battery.

4. Push the Holder in the direction of arrow and
remove the Belt, as shown below. (The CIS will
come out at the same time.)

5. Release the Belt and Flat Cable from the CIS.

Scan Upper

Scan Lower

CIS

Belt

3

2

1

Battery

CIS

Belt

Flat Cable

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-13

6. Remove the two screws securing the Scan Motor
Ass'y and remove it.

7. If necessary, remove the two screws securing the
Scan Motor and remove it.

8. Using a flat-blade screwdriver remove the Full
Sensor, as shown below.

Scan Motor Ass’y

Full Sensor

Scan Motor
Bracket

Scan Motor

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-14

5.13 Middle Cover

1. Before you remove the Middle Cover, you should
remove:

- Scan Ass'y (Refer to the 5.9)

2. Remove the five screws securing the Middle Cover,
as shown below.

3. Carefully release the Middle Cover from the Main
PBA, as shown below.

4. If necessary, take out the Stacker.

Main
PBA

Stacker

Middle Cover

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-15

5.14 HVPS

1. Before you remove the HVPS, you should remove:

- Scan Ass'y (Refer to the 5.9)

- Middle Cover (Refer to the 5.13)

2. Remove the three screws securing the Sheet and
remove it.

3. Remove the three screws securing the HVPS and
remove it with the HVPS Ground, as shown below.

4. Unplug the Connector from the HVPS.

HVPS

HVPS Ground

HVPS

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-16

5.15 Main PBA

1. Before you remove the Main PBA, you should
remove:

- Scan Ass'y (Refer to the 5.9)

- Middle Cover (Refer to the 5.13)

2. Unplug the all Connectors from the Main PBA, as
shown below.

3. Remove the six screws securing the Main PBA and
remove it.

SMPS/HVPS

Main Motor

LSU

Clutch

LIU

DEVE

Thermister

Main PBA

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-17

5.16 RX Drive

1. Before you remove the RX Drive, you should
remove:

- Scan Ass'y (Refer to the 5.9)

- Middle Cover (Refer to the 5.13)

- Main PBA (Refer to the 5.15)

2. If necessary, remove the two Bracket (Port, Main
PBA) and Ground, as shown below.

3. Remove the two screws securing the Engine
Shield and remove the six screws securing the
Frame then remove the RX Drive in the direction of
arrow, as shown below.

4. Remove the Connector, as shown below.

5. Release the four Gears (RDCN, OPC, Fuser, Feed)
from the Frame, as shown below.

6. Remove the four screws securing the Motor
Bracket and remove it. Then remove the two
screws securing the Motor and remove it.

Port Bracket

Ground

Main PBA
Bracket

RX Drive

RDCN Gear

Fuser Gear

OPC DR Gear

Feed Gear

Gear Bracket

RX Motor

Motor Bracket

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-18

5.17 Fuser

1. Before you remove the Fuser, you should remove:

- Scan Ass'y (Refer to the 5.9)

- Middle Cover (Refer to the 5.13)

2. Unplug the two Connectors from the SMPS and
Main PBA, as shown below.

3. Remove the four screws securing the Fuser and
remove it, as shown below.

4. Remove the Lever-M-Act Exit in the direction of
arrow, as shown below.

5. Remove the Cover-M-Safty, as shown below.

Thermister

Fuser

Cover-M-Safty

Lever-M-Act Exit

2

1

Fuser

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-19

6. Remove the Cover-M-Guide Exit, as shown below.

7. As shown below rotate the Holder to the direction
of the arrow which is attached to the Exit Roller
F/Down and Exit Gear(DRV17). (The Roller_Main,
Roller_FR, F/Down Holder, Spring will come out

at the same time.)

NOTICE: If you don't follow the direction above the

Spring will come out forcing the Roller_Main,
Roller_FR, F/Down Holder inside the Frame
Ass'y .

8. Remove the two screws securing the Thermo Cap
and remove it.

9. Take out the Thermostat then release the CBF
Harness, as shown below.

10. Remove the screw securing the Harness and

remove it. Then take out the Thermistor, as shown
below.

Cover-M-Guide Exit

Exit Gear

Exit Roller F/Down

Thermo Cap

Roller_FR

Roller_Main

F/Down Holder

Holder

Thermostat

Thermistor

11. Release the CBF Harness from the Halogen
Lamp and remove the two screws securing the
Halogen Lamp, as shown below.

12. Remove the two screws securing the Cover-M
and remove it.

13. Take out the Halogen Lamp in the direction of
arrow, as shown below.

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-20

Cover-M

Halogen Lamp

Heat Roller

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-21

5.18 Engine Shield (LIU PBA, SMPS)

1. Before you remove the Engine Shield, you should
remove:

- Scan Ass'y (Refer to the 5.9)

- Middle Cover (Refer to the 5.13)

2. Unplug the all Connectors from the SMPS and LIU
PBA.

3. Remove the six screws securing the Engine Shield
and release the Harness, as shown below. Then
carefully release the Engine Shield from the
Actuator Feed Sensor Lever.

4. When if only remove the SMPS, first remove the
Rear Cover (refer to the 5.6) and unplug the Fuser
Connector and remove the six screws securing the
SMPS. Then unplug the Connector from the Main
PBA and carefully release the SMPS, as shown
below.

5. When if only remove the LIU PBA, first remove the
Rear Cover (refer to the 5.6) and remove the two
screws securing the LIU PBA. Then unplug the
Connector from the Main PBA and release the LIU
PBA as shown below.

Fuser

LIU Cable

SMPS Cable

Engine Shield
(W/LIU PBA, SMPS)

SMPS

LIU PBA

Actuator Feed Sensor Lever

Samsung Electronics

Service Manual

Disassembly and Reassembly

5-22

5.19 LSU

1. Before you remove the LSU, you should remove:

- Scan Ass'y (Refer to the 5.9)

- Middle Cover (Refer to the 5.13)

2. Remove the three screws securing the LSU and
remove it. Then unplug the two Connectors from
the LSU.

LSU

Disassembly and Reassembly

Samsung Electronics

Service Manual

5-23

5.20 Paper Path Frame

1. Before you remove the Paper Path Frame, you
should remove:

- Scan Ass'y (Refer to the 5.9)

- Middle Cover (Refer to the 5.13)

- Fuser (Refer to the 5.17)

- Engine Shield (Refer to the 5.18)

2. Remove the four screws securing the Paper Path
Frame and remove it in the direction of arrow, as
shown below.

3. Remove the Transfer Roller from the Frame, as
shown below.

4. Remove the screw securing the Solenoid-MP and
remove it, as shown below.

Solenoid-MP

Paper Path Frame

1

Bush

2

Transfer Roller

Bush(L)

Samsung Electronics

Service Manual

Alignment and Adjustments

4-1

4

4

4. Alignment and Adjustments

4.1 User Mode

The table below shows the map of User settings available in User Mode. These are fully described in the
User Guide and are not included here.

Paper Type

Plain Paper, Thick, Thin, Plain Paper
Bond, Color Paper, Card
stock, Labels, Transparency,
Envelope, Preprinted

Paper Size A4, Legal, Executive, Folio By Country

A5, B5, A6, Letter
Machine ID Fax:
(Only SCX-4521F) ID:
Date & Time 00-00-0000
(only SCX-4521F) 00:00(AM)
Clock Mode 12, 24 hours 12hours
(only SCX-4521F)
Language [English/FRANCAIS/Espanol/ English

Portugues/Deutsch/Italiano/

Pycckn/Norsk/Polski/

Suomi/Magyar/Dansk/

cestina/Svenska/Turkse

- 15 language

Power Save On 5, 10, 15, 30, 45 min. 5

Off
Ignore Toner On

Off
USB Mode Fast/Slow Fast

1. Paper Setting

Paper Type

2.Machine Setup

Machine ID

1

2

1

2

3

4

5

6

7

1st level 2nd level 3rd level Default Value

RETURN -- RETURN

left/right && Enter -- 14 character left/right && Enter

Alignment and Adjustments

Samsung Electronics

Service Manual

4-2

Default-Change Darkness Light/Normal/Dark Normal

Original Type Text, Text/Photo, Photo Text
Reduce/Enlarge [Original(100%)] 100%

[LGL

LTR(78%)]

[LGL

A4(83%)]

[A4

A5](71%)]

[A4

LTR(94%)]

[EXE

LTR(104%)]

[A5

A4](141%)]
25%
50%
150%
200%
400%
[Custom:25-400]

No. of Copies [1-99] 1
Timeout 15,30,60,180Sec, Off 60sec
Favorite copy Clone

Copy Collate

Autofit

2 side in 1 Pg

2 UP

4 UP

Poster
Off
Clone
Copy Collate
Autofit
ID Card Copy
2 UP This will set to 2UP
4 UP This will set to 4UP
Poster

3.Copy Setup

Default-Change

4. Copy Feature

Off

1

2
3

1
2
3
4
5
6
7
8

1st level 2nd level 3rd level Default Value

RETURN -- RETURN

left/right && Enter -- 14 character left/right && Enter

Samsung Electronics

Service Manual

Alignment and Adjustments

4-3

Default-Change Resolution Standard/Fine/Super Standard

Fine/Photo/Color
Ring to Answer 1~7 2
Darkness Light/Normal/Dark Normal
Redial Term 1~15Min 3minutes
Redials 1~13times 7times
MSG Confirm On, Off, On-Error On-Error
Image TCR On, Off
Auto Report On, Off On
Auto Reduction On, Off On
Discard Size 0~30mm 20mm
Receive Code 0~9 9
DRPD Mode set
Receive Mode Fax, Tel, Ans/Fax, DRPD
Delay Fax Fax:
Priority Fax Fax:
Add Page Yes, No
Cancel Job Yes, No
Send Forward On,Off Off
RCV Forward On Start Time/ End Time

Print Local Copy

Off Off

Junk Fax Setup On Fax:

Off Off
Secure Receive On,Off, Print Off
Prefix Dial FAX: xxxxx (5 digits)
Stamp RCV Name On, Off Off
ECM Mode On, Off On
Phone Book
(only SCX-4521F)
Sent Report
(only SCX-4521F)
RCV Report
(only SCX-4521F)
System Data
Scheduled Jobs
(only SCX-4521F)
MSG Confirm
(only SCX-4521F)
Junk Fax List
(only SCX-4521F) 10 ea
Speaker On, Off, Comm. Comm.
Ringer Off, Low,Med,High Med
Key Sound On, Off Off
Alarm Sound On, Off On

5. Fax Setup

(only SCX-4521F)

Default-Change

6. Fax Feature

(only SCX-4521F)

Delay Fax

7. Advanced fax

(only SCX-4521F)

8. Reports

Phone Book

9. Sound/Volume

Speaker

1

2
3
4
5
6
7
8

9
10
11
12
13

1

2

3

4

1

2

3

4

5

6

7

1

2

3

4

5

6

7

1

2

3

4

1st level 2nd level 3rd level Default Value

RETURN -- RETURN

left/right && Enter -- 14 character left/right && Enter

<continue..>

Alignment and Adjustments

Samsung Electronics

Service Manual

4-4

Clean Drum On,Off Off
Notify Toner On,Off Off
Clear Memory Clear All Mem.

Paper setting
Machine Setup
Copy Setup
Fax Setup
Fax Feature
Advanced Fax
Sound/Volume
Sent Report
RCV Report

Phone Book
Remote Test On Off
(only SCX-4521F) Off

10. Maintenance

Clean Drum

1
2
3

4

1st level 2nd level 3rd level Default Value

RETURN -- RETURN

left/right && Enter -- 14 character left/right && Enter

<continue..>

Samsung Electronics

Service Manual

Alignment and Adjustments

4-5

4.2 Tech Mode and Setting

4.2.1 How to Enter Tech Mode

In service (tech) mode the technician can check the machine and perform various tests to help with failure
diagnosis.

When in Tech mode the machine still performs all normal operations.

To enter the Tech mode (SCX-4521F)

To enter the Tech mode press in sequence and the LCD
briefly displays ‘TECH’, the machine has entered service (tech) mode.

To enter the Tech mode (SCX-4321)

To enter the Tech mode press in sequence and the LCD
briefly displays ‘TECH’, the machine has entered service (tech) mode.

Alignment and Adjustments

Samsung Electronics

Service Manual

4-6

4.2.2 Setting-up System in Tech Mode

Data Setup Send Level -9~-15 -12

(only SCX-4521F)

Modem Speed 33.6, 28.8, 14.4, 12.0, 9.6, 4.8 33.6

(only SCX-4521F)

Error Rate (only SCX-4521F) 5%, 10% 10%

Dial Mode (only SCX-4521F) Tone, Pulse Tone

Notify Toner Customer No.

Customer Name
Service No.

Serial No.
Clear All Mem.
Clear Count Total Page Count Enter Password

CRU Print CNT

FLT Scan Count

ADF Scan Count

Used Toner CNT

Edit Toner Dot
Flash Upgrade Local

Remote
Silence Time Off/ 12 Sec/Unlimited Off
(only SCX-4521F)

Machine Test Switch Test

Modem Test
(only SCX-4521F)
Dram Test
Rom Test
Pattern Test
Shading Test

Report Protocol(only SCX-4521F)

System Data

Key History Error Info
New Cartridge

Tech Mode

Data Setup

1

2

3

1st level 2nd level 3rd level Default Value

RETURN -- RETURN

left/right && Enter -- 14 character left/right && Enter

Samsung Electronics

Service Manual

Alignment and Adjustments

4-7

4.2.3 Setting

4.2.3.1 Changing the Display Language

To change the language that displays on the control panel, follow these steps:

1. Press Menu until “Machine Setup” appears on the top line of the display.

2. Press the scroll button ( or ) until “Language” appears on the bottom line of the display.

3. Press Enter. The current setting appears on the bottom line of the display.

4. Press the scroll button ( or ) until the language you want appears on the display.

5. Press Enter to save the selection.

6. To return to Standby mode, press Stop/Clear.

4.2.3.2 Setting the Machine ID (Only for SCX-4521F)

In some countries, you are required by law to indicate your fax number on any fax you send. The Machine
ID, containing your telephone number and name (or company name), will be printed at the top of each page
sent from your machine.

1. Press Menu until “Machine Setup” appears on the top line of the display. The first available menu item,
“Machine ID,” displays on the bottom line.

2. Press Enter. The display asks you to enter the fax number.
If there is a number already set, the number appears.

3. Enter your fax number using the number keypad.

4. Press Enter when the number on the display is correct. The display asks you to enter an ID.

5. Enter your name or the company name using the number keypad.
You can enter alphanumeric characters using the number keypad, and include special symbols by
pressing the 0 button.
For details on how to use the number keypad to enter alphanumeric characters.
If you want to enter the same letter or number in succession, enter one digit, move the cursor by
pressing the button and enter the next digit.
If you want to insert a space in the name, you can also use the button to move the cursor to skip the
position.

6. Press Enter when the name on the display is correct.

7. To return to Standby mode, press Stop/Clear.

NOTE: If you make a mistake while entering numbers, press the button to delete the last digit.

Alignment and Adjustments

Samsung Electronics

Service Manual

4-8

4.2.3.3 Setting the Date and Time

When you turn your machine on for the first time, the display prompts you to enter the current date and time.
After entering, it will not appear anymore. For the SCX-4521F, all of your faxes will have the date and time
printed on them.

1. Press Menu until “Machine Setup” appears on the top line of the display.

2. Press the scroll button ( or ) to display “Date & Time” on the bottom line and press Enter.

3. Enter the correct time and date using the number keypad.
For the SCX-4321, press the scroll button ( or ) to enter the time and date.

Month = 01 ~ 12
Day = 01 ~ 31
Year = requires four digits
Hour = 01 ~ 12 (12-hour mode)
00 ~ 23 (24-hour mode)
Minute = 00 ~ 59

You can also use the scroll button ( or ) to move the cursor under the digit you want to correct
and enter a new number. For the SCX-4321, you can use Enter or Upper Level to move the cursor.

4. To sel ect “ AM” or “PM” for 12-hour format, press the or # button or any number button.
For the SCX-4321, press Enter and then the scroll button ( or ).
When the cursor is not under the AM or PM indicator, pressing the or # button immediately moves
the cursor to the indicator. For the SCX-4321, press the scroll button ( or ) to move the cursor to
the indicator.
You can change the clock mode to 24-hour format (e.g. 01:00 PM as 13:00).

5. Press Enter when the time and date on the display is correct.
When you enter a wrong number, the machine beeps and does not proceed to the next step. If this
happens, just reenter the correct number.

6. To return to Standby mode, press Stop/Clear.

4.2.3.4 Changing the Clock Mode

You can set your machine to display the current time using either a 12-hour or 24-hour format.

1. Press Menu until “Machine Setup” appears on the top line of the display.

2. Press the scroll button ( or ) until you see “Clock Mode” on the bottom line and press Enter.
The clock mode currently set for the machine displays.

3. Press the scroll button ( or ) to select the other mode and then press Enter to save the selection.

4. To return to Standby mode, press Stop/Clear.

NOTE: If power to the machine is cut off, you need to reset the correct time and date once the power has been

restored.

NOTE: The date format may differ from country to country.

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4.2.3.5 Setting the Paper Size and Type

After loading paper in the tray, you need to set the paper size and type using the control panel buttons.
These settings will apply to copy and fax modes. For PC-printing, you need to select the paper size and type
in the application program you use on your PC.

1. Press Menu.
The display shows “Paper Setting” on the top line of the display.

2. Press the scroll button ( or ) to display “Paper Size” on the bottom line and press Enter to access
the menu item.

3. Use the scroll button ( or ) to find the paper size you are using and press Enter to save it.

4. Press the button to scroll to “Paper Type” and press Enter to access the menu item.

5. Use the scroll button ( or ) to find the paper type you are using and press Enter to save it.

6. To return to Standby mode, press Stop/Clear.

4.2.3.6 Setting Sounds (Only for SCX-4521F)

You can control the following sounds:

• Speaker: You can turn on or off the sounds from the telephone line through the speaker, such as the dial

tone or a fax tone. With this option set to “Comm.” the speaker is on until the remote machine
answers.

• Ringer: You can adjust the ringer volume.

• Key Sound: With this option set to “On” a key tone sounds each time a key is pressed.

• Alarm Sound: You can turn the alarm sound on or off. With this option set to “On” an alarm tone sounds

when an error occurs or fax communication ends.

• You can adjust the volume level using the On Hook Dial button.

4.2.3.7 Speaker, Ringer, Key Sound, and Alarm Sound

1. Press Menu until “Sound/Volume” appears on the top line of the display.

2. Press the scroll button ( or ) to scroll through the options. Press Enter when you see the desired
sound option.

3. Press the scroll button ( or ) to display the desired status or volume for the option you have
selected. You will see the selection on the bottom line of the display. For the ringer volume, you can
select “Off,” “Low,” “Med,” and “High”. Setting “Off” means that the ringer does not sound. The machine
works normally even if the ringer is turned off.

4. Press Enter to save the selection. The next sound option appears.

5. If necessary, repeat steps 2 through 4.

6. To return to Standby mode, press Stop/Clear.

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4.2.3.8 Speaker Volume

1. Press On Hook Dial. A dial tone sounds from the speaker.

2. Press the scroll button ( or ) until you hear the volume you want. The display shows the current
volume level.

3. Press On Hook Dial to save the change and return to Standby mode.

4.2.3.9 Toner Save Mode

Toner Save mode allows your machine to use less toner on each page. Activating this mode extends the life
of the toner cartridge beyond what one would experience in the normal mode, but it reduces print quality.

To turn the toner save mode on or off, press Toner Save.

• If the button backlight is on, the mode is active and the machine uses less toner when printing a document.

• If the button backlight is off, the mode is deactivated and the machine prints with the normal quantity of toner.

4.2.3.10 Power Save Mode

Power Save mode allows your machine to reduce power consumption when it is not in actual use. You can
turn this mode on and select a length of time for which the machine waits after a job is printed before it
switches to a reduced power state.

1. Press Menu until “Machine Setup” appears on top line of the display.

2. Press the scroll button ( or ) until “Power Save” appears on the bottom line. Press Enter.

3. Press the scroll button ( or ) to display “On” on the bottom line and press Enter.
Selecting “Off” means that the power save mode is deactivated.

4. Press the scroll button ( or ) until the time setting you want appears.
The available options are 5, 10, 15, 30, and 45 (minutes).

5. Press Enter to save the selection.

6. To return to Standby mode, press Stop/Clear.

NOTE: You can adjust the speaker volume only when the telephone line is connected.

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4.2.4 FLASH UPGRADE

There are 2 methods to update the Flash Rom, Local and Remote.

(1) Local Machine

• RCP (Remote Control Panel) mode
This method is for Parallel Port or USB Port. Connect the PC and activate the RCP (Remote Control Panel) to
upgrade the Firmware.

< Method >
How to Update Firmware using RCP

1. Connect PC and Printer with a Parallel Cable or a USB Cable.

2. Run the RCP utility and select Firmware Update.

3. Search for the Firmware file to be used to update the set using the Browse Icon.

4. Click the Update icon. The firmware file is transmitted to the Printer automatically and the printer is
initialized when the download completes.

5. Click the Refresh icon and check that the updated version numbers are displayed.

• DOS Command mode
This method is ONLY for Parallel Port. Connect the PC to the set using a Parallel Cable and enter the DOS
Command to upgrade the firmware.

< Method >

1. First of all you need the following files : down.bat, down_com.bin, fprt.exe, and Rom File: (file name for
upgrade). Ensure you save ALL of these files in the same folder.

2. At the DOS prompt enter the correct command (as shown below) and push the enter key.
Then the upgrade will automatically take place..

3. There are two commands use the correct one depending on the condition of the set..

* When the product is in the idle condition

down "rom file"

* When the product is in Ready condition

(TECH MODE --> DATA SETUP --> FLASH UPGRADE --> LOCAL)

copy/b "rom file" lpt1

4. Do not turn off the power during the upgrade process.

(2) Remote FAX

It is possible to use a set that already has the latest firmware to upgrade a remote set remotely using the
telephone system.

< Method >

1. On the set that has the latest firmware set it toi transmit the upgrade:­(TECH MODE •DATA SETUP•••• FLASH UPGRADE•••• REMOTE)

2. Enter the telephone number of the set that needs to be upgraded.
(Several faxes can be upgrade at the same time. In this case, enter each fax number.)

3. When the enter button is pressed the set sends the firmware file by calling designated fax number.
(Around 10~15 minutes are needed to send the file.)

< Caution >

1. The Sending and Receiving fax machines MUST be the same model.

2. The sending fax must be set up in ECM mode and the Receiving fax memory must be 100%.
If not the function will not work.

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4.2.5 Machine Test

SWITCH TEST

Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window each
time you press a key.

MODEM TEST

Use this feature to hear various transmission signals to the telephone line from the modem and to
check the modem, amplifier and speaker. If no transmission signal sound is heard, it means the
modem part of the main board, amplifier, speaker or speaker harness is faulty.

DRAM TEST

Use this feature to test the machine's DRAM. The result appears in the LCD display.
If all memory is working normally, the LCD shows << O K >>

ROM TEST

Use this feature to test the machine's ROM. The result and the software version appear in the LCD
display.

• FLASH VER : 1.00 V

• ENGINE VER :1.00V

PATTERN TEST

Using this pattern printout you can check that the printer mechanism is functioning properly.
This function is for factory manufacturing use only.

SHADING TEST

The function is used to set the optimum scan quality determined by the specific characteristics of the
CIS(Contact Image Sensor). If copy image quality is poor perform this function to check the
condition of the CIS unit.

< Method >

1. Select the [Shading Test] in TECH MODE
(Menu, #, 1934).

2. Push the ENTER button and an image will
be scanned.

3. After scanning the CIS SHADING PROFILE
will be print out.

4. If the printed image is different to the
sample image shown the CIS is defective.

NOTICE : When you test the CIS, make

sure that the cover is closed.

MAX=229 Min=168 Avg=193 Diff=15 PRNU=6

MAX=234 Min=174 Avg=200 Diff=14 PRNU=7

MAX=241 Min=179 Avg=204 Diff=14 PRNU=4

MAX=240 Min=176 Avg=202 Diff=15 PRNU=6

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4.2.6 Report

PROTOCOL LIST

This list shows the sequence of the CCITT group 3 T.30 protocol during the most recent sending or receiving
operation. Use this list to check for send and receive errors. If

SYSTEM DATA

This list provides a list of the user system data settings and tech mode settings.

KEY HISTORY

This list shows th input key history.

ERROR INFO

This list display the detail machine error list.

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4.3 Control Panel

4.3.1 Control Panel Functions (SCX-4521F)

SCX-4521F

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4.3.2 Control Panel Functions (SCX-4321)

SCX-4321

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4.4 LCD Status Error Massages

STATUS LCD Display Descriptions

Document Jam Document Jam When Document Jam occurred at ADF module.

This is displayed on LCD, Print in the Transmission Journal.

Door Open or Jam [Front or Rear] When machine’ front side cover or Jam Cover was opened, it
Cover Open [Cover Open] displayed On the LCD.

NO paper [ No Paper ] When there is no paper in CASSETTE Tray, machine Displays

Add Paper this message on LCD.

PAPER JAM 0 [Paper Jam 0] When the machine encountered paper jam in pick up area,

Open/Close Door Machine displays on the LCD until DOOR OPEN & CLOSE.

PAPER JAM 1 [Paper Jam 1] When the machine encountered paper jam in paper exit of Machine,

Open/Close Door machine displays on the LCD until DOOR OPEN & CLOSE.

PAPER JAM 2 [Paper Jam 2] When the machine encountered paper jam in paper exit of Machine,

Check Inside machine displays on the LCD until DOOR OPEN & CLOSE.

Communication Error [COMM. Error] When the machine has problem in communication, It displayed on

the LCD.
Machine displays this in case of Transmission.

Machine displays this in case of fax handshaking step of Reception.
Line Error [Line Error] When the machine has problem in case of Fax Data reception step.
NO ANSWER [No Answer] When the machine could not connect to remote fax after Completion

of redial up to redial counter in system data.
INCOMPATIBLE [Incompatible] Remote party did not have the requested feature, such as polling.
LINE BUSY Line Busy The remote fax didn’t answer.
POWER FAILURE Power Failure When the machine’s user memory has not been backup and There

was power off / on .
STOP PRESSED [Stop Pressed] When the operator pressed the STOP button during transmission.
MEMORY FULL Memory Full When the machine has encountered the user memory was full,
FUSER ERROR CRU Fuse Error When the machine failed in installing the new toner cartridge.
LSU ERROR [Hsync Error] tech mode
LSU ERROR [LSU Error] user mode

When the machine has encountered the Laser Beam Scanning unit

could not reach the READY state,
TONER LOW [Toner Low] When the machine has encountered the Toner Low,
TONER EMPTY [Toner Empty] When the machine has encountered the Toner Empty,

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STATUS LCD Display Descriptions

BY PASS JAM [Bypass Jam] When the machine detected the non feeding from BYPASS Tray.
GROUP is not available Group Not Available You have tried to select a group location where only a single

Location number can be used.

RETRY REDIAL? Retry Redial ? the machine is waiting for the programmed interval to automatically

redial a previously busy station.

NO. NOT ASSIGNED NO. Not Assigned The speed dial location you tried to use has no number assigned to it.
Load document Load Document You have attempted to set up a sending operation with no

Document loaded.

Memory full and canel the job Cancel ? When the machine has encountered the memory full during storing

1:Yes 2:No the document into memory, the machine display the "CANCEL ?" to

operator whether he/she make a decision the canceling the job or

accept the scanned page so far to transmit the remained

documents.

Job has not been created Operation Not When operator is doing in ADD/CANCEL operation and

Assigned There is no job to handle if operator entered the job no.
Low Heat Error [Low Heat Error] Temperature could not reach certain level.
Open Fuser Error Open Fuser Error The thermister has been disconnected.
Over Heat Error [Over Heat] Temperature has gone up very high degree.

[Jam 1] When the machine detected the toner cartridge has not

[No Catridge] been installed, or detected jam1 in warmup state.
Memory Dial Full Memory Dial Full During Auto dial transmission when all 15 jobs are configured and

try to add 16th job

<continue..>

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4.5 Engine Test Mode

The Engine Test Mode supplies useful functions to check the condition of the print engine. It tests the condition of each
device and displays the result of the test on the LCD. It is divided into 5 functions (0~4), and these are shown below.

4.5.1 To enter the Engine Test Mode

To enter the Engine Test mode (SCX-4521F)

Press in sequence, and the LCD briefly displays
‘Engine Test’, the machine has entered Engine Test Mode.

Press “0”, “1”, “2”, “3” or “4” to select the Test No. (see list below – left hand column)

To enter the Engine Test mode (SCX-4321)

Press in sequence, and the LCD briefly displays
‘Engine Test’, the machine has entered Engine Test Mode.

Press “0”, “1”, “2”, “3” or “4” to select the Test No. (see list below – left hand column)

4.5.2 Diagnostic

NO. Sub No. Engine test Remark

0 1 Motor Test 1 : On, 2 : Off – next test selected

2 Pick Up Test 1 : On, 2 : Off – next test selected
3 Fan Test 1 : On, 2 : Off – next test selected
4 Manual Clt Test 1 : On, 2 : Off – next test selected
5 PTL Test 1 : On, 2 : Off – next test selected

1 1 LSU Motor Test 1 : On, 2 : Off – next test selected

2 LSU Hsync Test 1 : On, 2 : Off – next test selected
3 LD Test 1 : On, 2 : Off – next test selected

2 1 Feed Sensor Test 1. Check : read the sensor

2. Next : Next Sensor test

2 Exit Sensor Test 1. Check : read the sensor

2. Next : Next Sensor test

3 Cover Sensor Test 1. Check : read the sensor

2. Next : Next Sensor test

4 Empty Sensor Test 1. Check : read the sensor

2. Next : Next Sensor test

5 Manual Sensor Text 1. Check : read the sensor

2. Next : Next Sensor test

3 1 Therm ADC 180 1 : On, 2 : Off (maintain the fusing temp. 80˚C)

2 Therm ADC 140 1 : On, 2 : Off (maintain the fusing temp. 135˚C)
3 Therm ADC 120 1 : On, 2 : Off (maintain the fusing temp. 160˚C)
4 Therm ADC 100 1 : On, 2 : Off (maintain the fusing temp. 191˚C)

4 1 MHV Test 1 : On, 2 : Off (-1550V ± 50V)

2 Dev Bias Test 1 : On, 2 : Off (-430V ± 20V)
3 THV EN/NEG Test 1 : On, 2 : Off (-1200V +300V/-150V)
4 THV ON (1300V) 1 : On, 2 : Off (+1300V ± 20V)
5 THV ADC 1300V 1 : On, 2 : Off (ADC Value : 101 ±5)
6 THV ADC 600V~3500V 1 : On, 2 : Off (Compare each ADC Value)

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4.5.3 Detail Description (Engine T est Mode)

Function Name Description Display

01.Motor Test The main motor starts when the execution key is pressed Main Motor On/Off
and stops when the stop key is pressed.

02.Pick Up Test Automatically stops, when the execution is chosen. Tray 1,2 Solenoid On/Off
stops, when the execution is chosen.

03.Fan Test The fan starts when the execution key is pressed and Fan On/Off
stops when the stop key is pressed.

04.Manual Clutch Test The tray2,3 clutch is on for 1sec and then it automatically Tray 2,3 Clutch On/Off
stops, when the execution is chosen.On this function,
the main motor runs before 2sec from the point of the clutch
on in order to check the clutch state.

05.PTL Test PTL(Pre-Transfer Lamp) is lights when the execution key PTL On/Off
chosen and it stops when the stop key is chosen.

11.LSU Motor The laser motor starts when the execution key is pressed Laser Motor On/Off
and stops when the stop key is pressed.

12.LSU Hsync Test The LSU motor starts and "Laser Ready" is displayed if Laser Leady On/Off
the motor spins at the correct speed, otherwise "Laser Error"
is displayed.

13.LD Test "Diode On" is displayed, when the laser diode is on. Diode On/Off
Otherwise "Diode Off" is displayed.

21.Feed Sen Test These functions allow the current state of the sensor to be

"Sensor Off" or “ Sensor On ”

22.Exit Sen Test displayed.

23.Cover Sen Test This function allows the current state of the Cover sensor

"Cover Open" or "Cover Close"
to be displayed. Touch the sensor and confirm that the
message changes: "Cover Open" to " Cover Close"

24.Empty Sen Test These functions allow the current state of the sensor to be

"Sensor Off" or “ Sensor On ”

25.Manual Sen Test displayed.

31.Them ADC 180 "Current value" is displayed on the upper line of the LCD, Target temperature and

32.Them ADC 140 and "Target value" on the bottom line. output temperature from

33.Them ADC 120 Target value is limited from "191°C" to "80°C" thermistor and ADC.

34.Them ADC 100

41.MHV Test These Functions are provided to check whether the MHV On/Off

42.Dev Bias Test control of the HVPS is functioning correctly. Dev Bias On/Off

43.THV EN/NEG Test THV EN/NEG On/Off

44.THV ON(1300V) THV On/Off

45.THV ADC 1300V ADC value displayed.

46.THV ADC 600V~3500 ADC value displayed.

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4.6 Paper Path and Clearing Paper Jams

4.6.1 Copy & Scan Document Path

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4.6.2 Printer Paper Path

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)

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4.6.3.1 In the Tray

1. Remove the jammed paper in the tray by gently
pulling it straight out.

2. Open and close the front door to resume printing.

4.6.3 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.

To avoid tearing the paper, pull out the jammed paper gently and slowly. Follow the instructions in the following
sections to clear the jam.

Message Location of Jam

[Paper Jam 0] In the tray
Open/Close Door
[Paper Jam 1] In the fuser area or around the toner
Open/Close Door cartridge.
[Paper Jam 2] In the paper exit area
Check Inside

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1. Open the front door and pull the toner cartridge out,
lightly pushing it down.

2. Remove the jammed paper by gently pulling it
straight out.

3. Replace the toner cartridge and close the front
door. Printing automatically resumes.

4.6.3.2 In the Fuser Area or Around the T oner Cartridge

NOTE: The fuser area is hot. Take care when

removing paper from the machine.

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1. Open and close the front door. The jammed paper
automatically exits the machine.
If the paper does not exit, continue to step 2.

2. Gently pull the paper out of the output tray.

3. If there is any resistance and the paper does not
move when you pull, or if you cannot see the paper
in the output tray, open the rear door by pulling the
tab on it.

4. Remove the jammed paper by gently pulling it
straight out.

5. Close the rear door.

6. Open and close the front door to resume printing.

4.6.3.3 In the Paper Exit Area

NOTE: Inside of the machine is hot. Take care

when removing paper from the machine.

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1. Load the paper into the tray, as shown below.

2. Open the printer’s properties window, set the paper
size to A5 from the Paper tab.

3. From the Orientation option of the Layout tab, set
the Rotate option to 90 .

4. Click OK to start printing.
For details, see Software User’s Guide.

4.6.3.4 Tips for Avoiding Paper Jams When Printing on the A5-sized Paper

If paper jams occur frequently when you print on A5-sized paper:

4.6.3.5 Tips for Avoiding Paper Jams

By selecting the correct paper types, most paper jams can be avoided. When a paper jam occurs.

• Follow the procedures in “Loading Paper”. Ensure that the adjustable guides are positioned correctly.

• Do not overload the tray.

• Do not remove paper from the tray while your machine is printing.

• Flex, fan, and straighten the paper before loading.

• Do not use creased, damp, or highly curled paper.

• Do not mix paper types in the tray.

• Use only recommended print materials. See “Paper Specifications”.

• Ensure that the recommended print side of print materials is facing up in the tray.

Exploded Views & Parts List

Service Manual

7-1

7

7

7. Exploded Views and Parts List

7.1 Main Exploded Views 7-2

7.2 ADF Assembly Exploded Views 7-5

7.2-1-2 ADF Motor Ass’y 7-6

7.2-3-2 Pick up-Ass'y 7-7

7.3 Platen Cover Assembly Exploded Views 7-10

7.4 ADF Platen Assembly Exploded Views 7-12

7.5 OPE Unit Exploded Views 7-14

7.6 MP Pick-Up Unit Exploded Views 7-16

7.7 Main Frame Assembly Exploded Views 7-18

7.8 MP Tray Assembly Exploded Views 7-20

7.9 Fuser Unit Exploded Views 7-22

7.10 Paper Path Assembly Exploded Views 7-24

Contents

Contents

DIGITAL LASER MFP The keynote of Product

- Machine Life: 50,000Pages

- Cpu: Chorus2

- Device Memory: 16MB

- Resolution: 600*600dpi

- Option: N/A

- Printing Speed: 22ppm/LTR,20ppm/A4

- Print Memory: 10MB

- Print Language: SPL

- Path Type: C-Path

- Cassette Capa.: 150sheets

- Outlet Stacking Capa.: 50sheets

- Toner Cartridge: initial(1K), sales(3K)

- ADF Capacity: 30sheets

- Scan Method: 600 dpi Color CIS

- Copy Speed: SDMC: 22Cpm/Ltr,

MDMC:

7Cpm/Ltr

- Interface: USB1.1, IEEE1284

Service Manual

Exploded Views & Parts List

7-2

7.1 Main Exploded Views

0

3

4

7

10

12

15

18

19

17

20

22

23

25

26

24-4

24-2

24-3

24-1

23-2

23-3

23-1

25-1

25-3

25-2

26-1

26-2

26-2-1

26-2-2

SCX-4521F

SCX-4321

27

24

27-1

27-1

1

28

13

13-1

13-2

2

5

6

8

9

14

29

31

32

30

Exploded Views & Parts List

Service Manual

7-3

Main Parts List

Drawer# SEC_Code Description QT'Y Remark

7.1-0 SCX-4521F 21PPM LASER MFP 4IN1 SCX-4521F

7.1-0 SCX-4321 21PPM LASER MFP 3IN1 SCX-4321

7.1-1 JC96-03392B ELA HOU-FRAME_LOWER 1

7.1-2 JC59-00023A UNIT-LSU 1

7.1-3 JC39-00321A CBF HARNESS-LSU 1

7.1-4 JC96-03352P ELA UNIT-DEVE INITIAL 1

7.1-5 JC96-03415A ELA HOU-FUSER_220V 1 220V

7.1-5 JC96-03414A ELA HOU-FUSER_110V 1 110V

7.1-6 JC63-00664A SHIELD-P-ENGINE 1

7.1-7 JC63-00631A GROUND-P-HVPS 2

7.1-8 JC44-00102A SMPS-WHITENY+(V2C) 1 220V

7.1-8 JC44-00101A SMPS-WHITNEY+ (V1) 1 110V

7.1-9 JC92-01684H PBA-LIU 1

7.1-10 JC39-00410A CBF HARNESS-HVPS 1

7.1-12 JC39-00641A HARNESS-LIU 1

7.1-13 JC96-01672A ELA UNIT-TERMINAL TR L 3

7.1-13-1 JC61-00031A SPRING ETC--HV LARGE 1

7.1-13-2 JC70-40912A ICT-SHAFT HV LARGE 1

7.1-14 JC61-01170A PLATE-P-CHANNEL 1

7.1-15 JC44-00079A HVPS-SKYLARK 1

7.1-17 JC61-01183A BRACKET-P-MAIN BOARD 1

7.1-18 JC63-00665A GROUND-P-MAIN BOARD 1

7.1-19 JC61-01182A BRACKET-P-PORT 1

7.1-20 JC92-01726D PBA MAIN-WHITNEY_PLUS 1 SCX-4521F

7.1-20 JC92-01726B PBA MAIN-WHITNEY_PLUS 1 SCX-4321

7.1-22 JC63-00649C COVER-SIDE R 1

7.1-23 JC96-03388B ELA HOU-COVER SIDE L 1

7.1-23-1 JC63-00650B COVER-SIDE L 1

7.1-23-2 3001-001494 SPEAKER 1

7.1-23-3 GB70-10500A IPR-UNIT FIXING BRAC 1

7.1-24 JC97-02202C MEA-COVER FRONT 1

7.1-24-1 JC63-00652C COVER-FRONT 1

7.1-24-2 JC63-00617B TRAY-M_CASSETTE 1

7.1-24-3 JC63-00628D TRAY-M_EXTENSION_L 1

7.1-24-4 JC63-00629D TRAY-M_EXTENSION SMALL 1

7.1-25 JC96-03387B ELA HOU-COVER MIDDLE 1

7.1-25-1 JC63-00653C COVER-MIDDLE 1

7.1-25-2 JC72-01351C PMO-M_STACKER 1

7.1-25-3 JC63-00838A SHEET-FAN 1

7.1-26 JC97-02241E MEA UNIT-COVER_REAR 1 SCX-4521F

7.1-26 JC97-02241G MEA UNIT-COVER_REAR 1 SCX-4321

7.1-26-1 JC63-00651E COVER-REAR 1 SCX-4521F

7.1-26-1 JC63-00651G COVER-REAR 1 SCX-4321

Service Manual

Exploded Views & Parts List

7-4

Drawer# SEC_Code Description QT'Y Remark

7.1-26-2 JC97-02210C MEA UNIT-COVER JAM 1

7.1-26-2-1 JC63-00654C COVER-JAM 1

7.1-26-2-2 JC63-00655A COVER-M-JAM DUMMY 1

7.1-27 JC96-04299A ELA HOU-SCAN 1 SCX-4521F

7.1-27 JC96-04300A ELA HOU-SCAN 1 SCX-4321

7.1-27-1 JC67-00087A CAP-M-HINGE 2

7.1-28 JC97-02239C MEA UNIT-MP TRAY 1

7.1-29 3903-000067 CBF-POWER CORD 1 220V

7.1-29 3903-000067 CBF-POWER CORD 1 110V

7.1-30 JC31-00027A FAN-DC_HUMMINGBIRD 1

7.1-31 - CBF LINE CORD 1

7.1-32 - CBF INTERFACE-USB 1

Main Parts List

Exploded Views & Parts List

Service Manual

7-5

7.2 ADF Assembly Exploded Views

0

2

3

MEA-COVER PLATEN

(see to next page)

2-1

2-2

2-2-1

2-2-2

2-2-3

2-2-4

3-1

3-2(see to next page)

3-4

3-3

1

1-1

1-2(see to next page)

1-3

1-4

1-5

1-6

1-7

1-7

1-8

1-9

1-10

1-11

1-12

1-11

1-15

1-11

1-17

1-18

1-7

1-7

1-16

4

1-19

1-20

1-13

1-14

1-19

1-20

Service Manual

Exploded Views & Parts List

7-6

7.2-1-2 ADF Assembly Exploded Views

7.2-1-2-16

7.2-1-2-17

7.2-1-2-15

7.2-1-2-14

7.2-1-2-13

7.2-1-2-10

7.2-1-2-11

7.2-1-2-12

7.2-1-2-11

7.2-1-2-10

7.2-1-2-10

7.2-1-2-9

7.2-1-2-8

7.2-1-2-7

7.2-1-2-3

7.2-1-2

7.2-1-2-2

7.2-1-2-4

7.2-1-2-5

7.2-1-2-6

Exploded Views & Parts List

Service Manual

7-7

7.2-3-2 Pick up - Ass'y

7.2-3-2-8

7.2-3-2

7.2-3-2-9

7.2-3-2-2

7.2-3-2-3

7.2-3-2-4

7.2-3-2-5

7.2-3-2-6

7.2-3-2-7

7.2-3-2-13

7.2-3-2-13

7.2-3-2-14

7.2-3-2-10

7.2-3-2-11

7.2-3-2-12

7.2-3-2-15

7.2-3-2-16

7.2-3-2-11-27.2-3-2-11-2

7.2-3-2-11-17.2-3-2-11-1

7.2-3-2-11-2

7.2-3-2-11-1

7.2-3-2-15-2

7.2-3-2-15-1

7.2-3-2-17

7.2-3-2-18

Service Manual

Exploded Views & Parts List

7-8

ADF Assembly Parts List

Drawer# SEC_Code Description QT'Y Remark

7.2-0 JC96-04232A ELA HOU-ADF 1

7.2-1 JC96-03380B ELA HOU-ADF LOWER 1

7.2-1-1 JC63-00656C COVER-ADF LOWER 1

7.2-1-2 JC96-03379A ELA HOU-ADF MOTOR 1

7.2-1-2-2 JC61-01178A BRACKET-M-GEAR 1

7.2-1-2-3 JC61-01180A BRACKET-P-MOTOR 1

7.2-1-2-4 JC31-00036A MOTOR STEP-ADF 1

7.2-1-2-5 JC66-00556A IMPELLER-ADF 1

7.2-1-2-6 6003-000196 SCREW-TAPTITE 2

7.2-1-2-7 JC66-00454A LINK-M-SWING ADF 1

7.2-1-2-8 JB70-00070A IPR-WASHER WAVE 1

7.2-1-2-9 JC66-00457A GEAR-SWING 31/20 ADF 1

7.2-1-2-10 JC66-00458A GEAR-IDLE 35 ADF 3

7.2-1-2-11 JC66-00456A GEAR-40/21 ADF 2

7.2-1-2-12 JC66-00455A GEAR-58/25 ADF 1

7.2-1-2-13 JB66-00101A GEAR-CLUTCH 29 1

7.2-1-2-14 JB72-00844A PMO-WHITE CLUTCH SUB 29 1

7.2-1-2-15 JC66-00322A GEAR-CLUTCH 39 1

7.2-1-2-16 6044-000001 RING-CS 1

7.2-1-2-17 6031-001051 WASHER-PLAIN 1

7.2-1-3 JC92-01618A PBA SUB-ADF 1

7.2-1-4 JC63-00667A GROUND-P-ADF 1

7.2-1-5 JC39-00407A CBF HARNESS-ADF 1

7.2-1-6 JC66-00559A ROLLER-EXIT 1

7.2-1-7 JB72-00819A PMO-BUSH 4

7.2-1-8 JC66-00310A GEAR-AGITATOR-2 1

7.2-1-9 6044-000159 RING-C 1

7.2-1-10 JC72-01011A PMO-ACTUATOR SCAN SENSOR 1

7.2-1-11 6107-001135 SPRING-CS 3

7.2-1-12 JC75-00095A MEC-BRUSH ANTISTATIC 1

7.2-1-13 JB61-00076A SPRING ETC-TORSION DOC (CC2-F) 3

7.2-1-14 JC61-01179A PLATE-M_WHITE BAR 1

7.2-1-15 JC72-01011A PMO-ACTUATOR SCAN SENSOR 1

7.2-1-16 JC66-00460A SHAFT-M-FEED GEAR 38 1

7.2-1-17 JC72-01010A PMO-ACTUATOR REGI SENSOR 1

7.2-1-18 JC66-00560A ROLLER-DRIVE 1

7.2-1-19 JC61-00712A GUIDE-STACKER SUB 1

7.2-1-20 JC66-00594A SHAFT-STACKER 2

7.2-2 JC97-02804A MEA UNIT-ADF UPPER 1

7.2-2-1 JC63-00657C COVER-M_ADF UPPER 1

7.2-2-2 JC97-01709A MEA UNIT-HOLDER ADF 1

7.2-2-2-1 JC61-00694A HOLDER-M-ADF 1

7.2-2-2-2 JC63-00243A SHEET-ADF HOLDER 1

Exploded Views & Parts List

Service Manual

7-9

ADF Assembly Parts List

Drawer# SEC_Code Description QT'Y Remark

7.2-2-2-3 JB73-00052A RMO-ADF RUBBER 1

7.2-2-2-4 JC61-00387A SPRING ETC-PAD 1

7.2-3 JC97-02801A MEA UNIT-COVER OPEN 1

7.2-3-1 JC63-00658C COVER-M_ADF OPEN 1

7.2-3-2 JC97-02203A MEA UNIT-PICKUP 1

7.2-3-2-2 6044-000159 RING-C 1

7.2-3-2-3 JB66-00103A GEAR-ADF 38 1

7.2-3-2-4 JC72-41191A PMO-BEARING SHAFT 1

7.2-3-2-5 JB72-00817A PMO-ADF CLUTCH 1

7.2-3-2-6 JB72-00821A PMO-ADF COLAR 1

7.2-3-2-7 JB61-70904A SPRING ETC-CLUTCH 1

7.2-3-2-8 JC66-00839A SHAFT-M-ADF 1

7.2-3-2-9 JC72-00734A PMO-COVER ADF 1

7.2-3-2-10 6031-000023 WASHER-PLAIN 1

7.2-3-2-11 JB75-00299A MEC-ADF ROLLER ASSY 1

7.2-3-2-11-1 JB72-00822A PMO-SLEEVE ADF 1

7.2-3-2-11-2 JB73-00054A RMO-ADF ROLLER 1

7.2-3-2-12 JB66-00104A GEAR-ADF IDLE 34 1

7.2-3-2-13 JB70-00168A ICT-PIN ADF 2

7.2-3-2-14 JB66-00102A GEAR-PICK UP IDEL 38 1

7.2-3-2-15 JB75-00300A MEC-PICK UP ROLLER ASSY 1

7.2-3-2-15-1 JB72-00823A PMO-SLEEVE PICK UP 1

7.2-3-2-15-2 JB73-00055A RMO-PICKUP ROLLER 1

7.2-3-2-16 JC72-00744A PMO-SHAFT PICK UP 1

7.2-3-2-17 JB72-00845A PMO-PICK UP CLUTCH SUB 2

7.2-3-2-18 JB66-00105A GEAR-PICK UP 26 1

7.2-3-3 JB72-00819A PMO-BUSH 1

7.2-3-4 JB72-00843A PMO-GUIDE PAPER 1

7.2-4 JC97-02802A MEA UNIT-COVER PLATEN 1

Service Manual

Exploded Views & Parts List

7-10

7.3 Platen Cover Assembly Exploded Views

1

8

2

8

8

8

12

12

11

11

8

8

10

9

10

13

13-1

13-3

13-2

0

13-4

13-5

Exploded Views & Parts List

Service Manual

7-11

Platen Cover Parts List

Drawer# SEC_Code Description QT'Y Remark

7.3-0 JC97-02802A MEA UNIT-COVER PLATEN 1

7.3-1 JC63-00659C COVER-PLATEN 1

7.3-2 JC63-00209A SHEET-WHITE SPONGE 1

7.3-8 JC61-00011A SPRING ETC-FEED 6

7.3-9 JF70-40521B ICT-SHAFT PINCH 1

7.3-10 JG72-40663A PMO-ROLL PINCH 2

7.3-11 JC66-00909A SHAFT-IDLE FEED 2

7.3-12 JC73-00091A RPR-ROLLER EXIT IDLE 2

7.3-13 JC97-02803A MEA UNIT-TX STACKER 1

7.3-13-1 JB72-01166D PMO-TX STACKER(SEC) 1

7.3-13-2 JC61-00833C GUIDE-DOC_R 1

7.3-13-3 JC61-00834C GUIDE-DOC_L 1

7.3-13-4 JF70-10616A IPR-WASHER SPRING CU 2

7.3-13-5 JG66-40003A GEAR-PINION 1

Service Manual

Exploded Views & Parts List

7-12

7.4 ADF Platen Assembly Exploded Views

0

1

2

1-1

1-2

1-2-1

1-2-2

1-2-3

1-2-4

1-2-5

1-2-6

1-2-7

1-3

1-4

1-5

1-14

1-6

1-7

1-8

1-9

1-11

1-12

1-13

1-13-1

2-1

2-2

2-3

2-4

1-13-2

Exploded Views & Parts List

Service Manual

7-13

ADF Platen Assembly Parts List

Drawer# SEC_Code Description QT'Y Remark

7.4-0 JC96-04235A ELA HOU-PLATEN 1

7.4-1 JC96-04236A ELA HOU-SCAN LOWER 1

7.4-1-1 JC63-00660B COVER-SCAN LOWER 1

7.4-1-2 JC96-02655A ELA HOU-SCAN MOTOR 1

7.4-1-2-1 JC61-00698A BRACKET-M-SCAN MOTOR 1

7.4-1-2-2 JB31-00011A MOTOR STEP-SCAN 1

7.4-1-2-3 JB66-00082A GEAR-TIMING 1

7.4-1-2-4 JB72-00764A PMO-HOLDER BELT 1

7.4-1-2-5 6044-000125 RING-E 1

7.4-1-2-6 JB66-00083A GEAR-IDLE 1

7.4-1-2-7 JB66-00084A GEAR-REDUCTION 1

7.4-1-3 0609-001223 CONTACT IMAGE SENSOR 1

7.4-1-4 JC39-00408A CBF SIGNAL-CIS FFC 1

7.4-1-5 JC66-00838A SHAFT-CIS 1

7.4-1-6 JB72-00764A PMO-HOLDER BELT-1 1

7.4-1-7 JB72-01136A PMO-HOLDER BELT-2 1

7.4-1-8 JB72-00763A PMO-PULLEY 1

7.4-1-9 JB61-00109A SPRING ETC-BELT 1

7.4-1-11 3301-001742 CORE-FERRITE 1

7.4-1-12 JB96-01381A ELA UNIT-CORE 2

7.4-1-13 JC96-02417A ELA HOU-FULL SENSOR HARNESS 1

7.4-1-13-1 0604-001095 PHOTO-INTERRUPTER 1

7.4-1-13-2 JC39-00215A CBF HARNESS-JAM_SENSOR 1

7.4-1-14 6602-001067 BELT-TIMING GEAR 1

7.4-2 JC97-02805A MEA UNIT-SCAN UPPER 1

7.4-2-1 JC63-00661C COVER-M_SCAN UPPER 1

7.4-2-2 JB68-00644A LABEL(P)-SHADING 1

7.4-2-3 JB01-00001A GLASS-ADF 1

7.4-2-4 JB01-00002A GLASS-PLATEN 1

Service Manual

Exploded Views & Parts List

7-14

7.5 OPE Unit Exploded Views

0

1

15

13

11

10

7

12

9

8

3

2

4

17

16

5

14

SCX-4321 (3in1)

1

12

13

7

11

10

8

9

3

4

0

2

14

17

15

SCX-4321F (4in1)

18

6

18

6

Exploded Views & Parts List

Service Manual

7-15

OPE Unit Parts List

Drawer# SEC_Code Description QT'Y Remark

7.5-0 JC96-04297J ELA HOU-OPE 1 SCX-4521F

7.5-1 JC63-01243J COVER-OPE 1

7.5-2 JC73-00202A RUBBER-TEL 1

7.5-3 JC73-00203A RUBBER-SCROLL 1

7.5-4 JC92-01727A PBA SUB-WHITNEY_OPE 1

7.5-5 JC64-00054F KEY-COPY 1

7.5-6 JC72-00672A PCT-LCD WINDOW 1

7.5-7 JC64-00053G KEY-TEL 1

7.5-8 JC64-00058A KEY-M-TONER SAVE 1

7.5-9 JC64-00157D KEY-SCAN TO 1

7.5-10 JC64-00187A KEY-M-STOP 1

7.5-11 JC64-00114A KEY-M_START 1

7.5-12 JC64-00060F KEY-FAX 1

7.5-13 JC64-00056G KEY-SCROLL 1

7.5-14 JC39-00412A CBF HARNESS-OPE 1

7.5-15 JC64-00059E KEY-RESOLUTION 1

7.5-16 JC07-00003A LCD-DISPLAY 1

7.5-17 JC39-00306A CBF HARNESS-LCD 1

7.5-18 JC63-00076A COVER-WINDOW SF-530 1

Drawer# SEC_Code Description QT'Y Remark

7.5-0 JC96-04298A ELA HOU-OPE 1 SCX-4321

7.5-1 JC63-01244A COVER-OPE 1

7.5-2 JC73-00204A RUBBER-TONER 1

7.5-3 JC73-00203A RUBBER-SCROLL 1

7.5-4 JC92-01727B PBA SUB-WHITNEY_OPE 1

7.5-6 JC72-00672A PCT-LCD WINDOW 1

7.5-7 JC64-00059E KEY-RESOLUTION 1

7.5-8 JC64-00058A KEY-M-TONER SAVE 1

7.5-9 JC64-00157D KEY-SCAN TO 1

7.5-10 JC64-00187A KEY-M-STOP 1

7.5-11 JC64-00114A KEY-M_START 1

7.5-12 JC64-00056G KEY-SCROLL 1

7.5-13 JC64-00054F KEY-COPY 1

7.5-14 JC39-00412A CBF HARNESS-OPE 1

7.5-16 JC72-00672A PCT-LCD WINDOW 1

7.5-17 JC39-00306A CBF HARNESS-LCD 1

7.5-18 JC63-00076A COVER-WINDOW SF-530 1

Service Manual

Exploded Views & Parts List

7-16

7.6 MP Pick-Up Unit Exploded Views

5

3

4

6

1

2

4

0

Exploded Views & Parts List

Service Manual

7-17

MP Pick-Up Unit Parts List

Drawer# SEC_Code Description QT'Y Remark

7.6-0 not assign MP PICK_UP 1

7.6-1 JC66-00829A SHAFT-P-PICK_UP 1

7.6-2 JC61-01281A BRACKET-P-BAR_PICK_UP 1

7.6-3 JC61-01151A HOUSING-M-PICK_U 1

7.6-4 JC66-00811A CAM-M-PICK_UP 2

7.6-5 JC61-01173A HOUSING-M-PICK_UP B 1

7.6-6 JC73-00211A RUBBER-PICK_UP 1

Service Manual

Exploded Views & Parts List

7-18

7.7 Main Frame Assembly Exploded Views

1

2

18

18

3

4

5

8

7

9

10

10

11

12

13

14

17

15

16

2-1

2-2

2-3

2-3

2-4

0

19

6

5-1

5-3

5-2

5-4

21

21-2

21-3

21-5

21-4

21-1

22

Exploded Views & Parts List

Service Manual

7-19

Main Frame Assembly Parts List

Drawer# SEC_Code Description QT'Y Remark

7.7-0 JC96-03392B ELA HOU-FRAME_LOWER 1

7.7-1 JC61-01152A FRAME-M-BASE 1

7.7-2 JC97-02218A MEA UNIT-PLATE KNOCK_UP 1

7.7-2-1 JC61-01158A PLATE-M-KNOCK_UP 1

7.7-2-2 JC66-00720A SHAFT-P-CORE 1

7.7-2-3 JC72-01004A PMO-IDLE KNOCK UP MP 2

7.7-2-4 JC74-00011A MPR-PAD KNOCK UP MP 1

7.7-3 JC61-01258A SPRING ETC-TORSION DEVE_L 1

7.7-4 JC61-01259A SPRING ETC-TORSION DEVE_R 1

7.7-5 JC96-03592A ELA UNIT-RX DRIVE 1

7.7-5-1 JC61-01465A BRACKET-P-GEAR_SN 1

7.7-5-2 JC61-01449A BRACKET-P-MOTOR 1

7.7-5-3 JC66-00804A GEAR-RDCN 139/83 1

7.7-5-4 JC31-00037D MOTOR STEP-MAIN 1

7.7-5-5 JC72-00825A PMO-IMPELLER_DRV 1

7.7-6 JC97-02327B MEA UNIT-FRAME PATH 1

7.7-7 JC70-00500C ADJUST-CASSETTE_R 1

7.7-8 JC70-00499C ADJUST-CASSETTE_L 1

7.7-9 JG66-40003A GEAR-PINION 1

7.7-10 JC61-00836A FOOT-FRONT 2

7.7-11 JC66-00805A GEAR-RDCN 113/83 1

7.7-12 JC66-00806A GEAR-OPC DR 76/38/29 1

7.7-13 JC66-00807A GEAR-FUSER DR 63/35 1

7.7-14 JC66-00808A GEAR-FEED DR 41 1

7.7-15 JC66-00822A LEVER-M-ACTUATOR_EMPTY 1

7.7-16 JB61-00076A SPRING ETC-TORSION DOC (CC2-F) 1

7.7-17 JC63-00622A GROUND-P-OPC 1

7.7-19 JC67-00110A CAP-M-MOTOR 1

7.7-20 6107-001240 SPRING-CS 2

7.7-21 JC96-03797A ELA HOU-CRUM 1

7.7-21-1 JC61-01587A PLATE-M_HINGE 1

7.7-21-2 JC61-00011A SPRING ETC-FEED 1

7.7-21-3 JC61-01586A PLATE-M_CRUM 1

7.7-21-4 JC92-01763A CRUM_P PBA 1

7.7-21-5 6003-000282 SCREW-TAPTITE 2

Service Manual

Exploded Views & Parts List

7-20

7.8 MP Tray Assembly Exploded Views

0

1

2

3

4

5

Exploded Views & Parts List

Service Manual

7-21

MP Tray Assembly Parts List

Drawer# SEC_Code Description QT'Y Remark

7.8-0 JC97-02239C MEA UNIT-MP TRAY 1

7.8-1 JC61-01263C PLATE-MP 1

7.8-2 JC70-00514C ADJUST-MP L 1

7.8-3 JC70-00515C ADJUST-MP R 1

7.8-4 JG66-40003A GEAR-PINION 1

7.8-5 JC63-00711A SHEET-MP 1

Service Manual

Exploded Views & Parts List

7-22

7.9 Fuser Unit Exploded Views

0

1

3

4

3

6

7

8

9

10

11

12

13

14

28

6

7

29

30

31

32

33

36

34

2

15

16

17

18

23

19

27

27

27

27

27-3

27-2

27-1

20

21

22

24

25

26

5

Exploded Views & Parts List

Service Manual

7-23

Fuser Unit Parts List

Drawer# SEC_Code Description QT'Y Remark

7.9-0 JC96-03415A ELA HOU-FUSER_220V 1 220V

7.9-0 JC96-03414A ELA HOU-FUSER_110V 1 110V

7.9-1 JC61-01162A FRAME-P-FUSER 1

7.9-2 JC63-00615A COVER-M_FUSER 1

7.9-3 JC61-01177A HOLDER-M-EXIT R 2

7.9-4 JC66-00810A GEAR-EXIT_DRV17 1

7.9-5 JC66-01255A ROLLER-EXIT F/DOWN 1

7.9-6 6107-001168 SPRING-CS 2

7.9-7 JC66-10901A BUSH 2

7.9-8 JC61-00595A GUIDE-M-INPUT 1

7.9-9 JC66-00600A ROLLER-PRESSURE 1

7.9-10 JC66-00601A ROLLER-HEAT 1

7.9-11 JC66-00564A GEAR-FUSER, Z37 1

7.9-12 JC61-00589A BUSH-M-HR L 1

7.9-13 JC61-00590A BUSH-M-HR R 1

7.9-14 4713-001202 LAMP-HALOGEN 1 220V

7.9-14 4713-001203 LAMP-HALOGEN 1 110V

7.9-15 JC66-01311A ROLLER-EXIT_MAIN 3

7.9-16 JC66-00830A ROLLER-M_EXIT FR 3

7.9-17 JC61-01172A HOLDER-M-EXIT F/DOWN 3

7.9-18 6107-001163 SPRING-CS 3

7.9-19 1404-001337 THERMISTOR-NTC 1

7.9-20 JC47-00005B THERMOSTAT-150 1

7.9-21 JC67-00085A CAP-M-THERMO 1

7.9-22 JC39-00403B CBF HARNESS-FUSER(220V) 1 220V

7.9-22 JC39-00403A CBF HARNESS-FUSER(110V) 1 110V

7.9-23 JC39-00045A CBF HARNESS-THERMISTOR 1

7.9-24 JC66-00801A GEAR-EXIT_DR38/25 1

7.9-25 6031-001051 WASHER-PLAIN 1

7.9-26 6044-000001 RING-CS 1

7.9-27 Not assign CLAW 4

7.9-27-1 JC61-00064A SPRING ETC-CLAW 4

7.9-27-2 JC61-00584A HOLDER-M-PLATE CLAW 4

7.9-27-3 JC61-00605A PLATE-P-CLAW 4

7.9-28 JC63-00666A COVER-M-GUIDE EXIT 1

7.9-29 JC63-00668A COVER-M-SAFETY FUSER 1

7.9-30 JC66-00816A LEVER-M-ACTUATOR JAM 1

7.9-31 JC61-00049A SPRING ETC-TR(KOR) 1

7.9-32 JC61-01268A HOLDER-M_ACTUATOR 1

7.9-33 JC66-00906A LEVER-M_ACT EXIT 1

7.9-34 JG72-40744A PMO-BUSHING TX(B4) 1

7.9-36 JB61-00076A SPRING ETC-TORSION DOC (CC2-F) 1

Service Manual

Exploded Views & Parts List

7-24

7.10 Paper Path Assembly Exploded Views

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Exploded Views & Parts List

Service Manual

7-25

Paper Path Assembly Parts List

Drawer# SEC_Code Description QT'Y Remark

7.10-0 JC97-02327B MEA UNIT-FRAME PATH 1

7.10-1 JC61-01161A GUIDE-M-PAPER PATH 1

7.10-2 JC66-00814A LEVER-ACTUATOR FEED SENSOR 1

7.10-3 JB61-00107A SPRING ETC-LEVER SENSOR 1

7.10-4 JC70-10232A IPR-PLATE SAW 1

7.10-6 JC63-00626A GROUND-P-SAW 1

7.10-7 JC63-00623A GROUND-P-THV 1

7.10-8 JC63-00625A GROUND-P-VARISTOR 1

7.10-9 JC97-02217A MEA UNIT-HOLDER_PAD 1

7.10-9-1 JC61-70911A SPRING ETC-EXIT ROLL FD 2

7.10-9-2 JC69-00846A PAD-FRICTION 1

7.10-9-3 JC61-01169A HOLDER-M-PAD 1

7.10-10 JC66-00815A LEVER-M-KICKER P/U 2

7.10-11 JC97-02179A MEA UNIT-PICK UP GEAR 1

7.10-11-1 JC66-00803A GEAR-PICK_UP B 1

7.10-11-2 JC66-00802A GEAR-PICK_UP A 1

7.10-11-3 6107-001167 SPRING-CS 1

7.10-12 JC33-00019A SOLENOID-PICKUP 1

7.10-13 JC66-00809A GEAR-FEED 35/19 1

7.10-14 JC61-00588A BUSH-M-TR L 1

7.10-15 JC72-00102A PMO-BUSHING_TR(L) 1

7.10-16 JC61-70940A SPRING ETC-TR(12) 2

7.10-17 JC66-00725A ROLLER-TRANSFER 1

7.10-18 JC61-00583A HOLDER-PTL 1

7.10-19 JC70-00307A IPR-P-EARTH TRANSFER 1

7.10-20 JC66-00829A SHAFT-P-PICK_UP 1

7.10-21 JC61-01151A HOUSING-M-PICK_U 1

7.10-22 JC61-01173A HOUSING-M-PICK_UP B 1

7.10-23 JC73-00211A RUBBER-PICK_UP 1

7.10-24 JC66-00811A CAM-M-PICK_UP 2

7.10-25 JC66-00813A GEAR-TRANSFER 1

7.10-26 JC61-01281A BRACKET-P-BAR_PICK_UP 1

7.10-27 JC63-00873A SHEET-PATH 1

Block diagram

Service Manual

8-2

Samsung Electronics

8

8

8. Block Diagram

8.1 System Block Diagram

Connection Diagram

Service Manual

9-1

Samsung Electronics

9

9

9. Connection Diagram

110V for USA

240V for EU

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