Xerox Phaser 3120, Phaser 3130 Service Manual

SERVICE

LASER PRINTER

Phaser 3120
Phaser 3130

Manual

LASER PRINTER CONTENTS

1. Precautions

2. Specifications

3. Disassembly and Reassembly

4. Troubleshooting

5. Exploded Views and Parts List

6. Block Diagram

7. Connection Diagram

8. Schematic Diagram

1

1

1-1

Precautions

Service Manual

1. Precautions

The cautions in the below are items needed to keep in mind when maintaining and servicing.
Please read carefully and keep the contents in mind to prevent accidents while servicing and to prevent
that the machine gets damage.

1.1 Warning for safety.

(1) Request the service by qualified service person.

The service for this machine must be performed by a service person who took the additional education of
this field.
It is dangerous if unqualified service person or user tries to fix the machine.

(2) Do not rebuild it discretionary.

Do not attach or change pats discretionary. Do not dissemble, fix, and rebuilt it. If do, printer will abnormally
work and electric shock or a fire can be occurred.

(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, is certified as a Class I laser product conforming 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 precautions 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 LESPOSIZIONE 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 STRLNING.

ADVARSEL. - USYNLIG LASERSTR LNING NR DEKSEL

PNES. STIRR IKKE INN I STR LEN.

UNNG EKSPONERING FOR STRLEN.

VARNING - OSYNLIG LASERSTR LNING NR DENNA DEL

R PPNAD OCH SPRREN R URKOPPLAD.

BETRAKTA EJ STR LEN. STRLEN R FARLIG.

VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA

OLET ALTTIINA N KYM TTM LLE LASER­S TEILYLLE L KATSO S TEESEEN.

1-2

Precautions

Service Manual

1.2 Caution for safety

1.2.1 Precaution related noxious material

The toner in a printer cartridge contains a chemical material, which might harm human body if it is swallowed.
Please keep children out of the toner cartridge.

1.2.2 Precaution related electric shock or fire

It is possible to get electric shock or burn by fire if you don't fallow the instructions of the manual.

(1) Use exact voltage. Please do use an exact voltage and wall socket. If not, a fire or an electric leakage can

be caused.

(2) Use authorized power code. Do use the power code supplied with PRINTER. Afire can be occurred when

over current flows in the power code.
(3) Do not insert many codes in an outlet. If do, a fire can be occurred due to flow over current in an outlet.
(4) Do not put water or extraneous matter in the PRINTER. Please do not put water, other liquid, pin, clip, etc.

It can cause a fire, electric shock, or malfunction. If it is happened, turn off the power and remove the

power plug from outlet immediately.
(5) Do not touch the power plug with wet hand. When servicing, do remove the power plug from outlet. And

do not insert or take off it with wet hand. Electric shock can be occurred.
(6) Caution when inserting or taking off the power plug. The power plug has to be inserted completely. If not,

a fire can be caused due to poor contact. When taking off the power plug, do grip the plug and take it off.

If grip the line and pull over, it could be damaged. A fire or electric shock could cause.
(7) Management of power code. Do not bend, twist, or bind it and place other materials on it. Also, do not fix

it with staples. If the power code gets damage, a fire or electric shock can be caused. Adamaged power

code must be replaced immediately . Do not repair the damaged part and reuse it. Arepaired part with plas-

tic tape can be occurred a fire or electric shock. Do not spread chemicals on the power code. Do not

spread insecticide on the power code. Afire or electric shock can be occurred due to thinner(weak) cover

of the power code.
(8) Check whether the power outlet and the power plug are damaged, pressed, chopped, or blazing fire or

not. When such inferiorities are found, repair it immediately. Do not make it pressed or chopped when

moving the machine.
(9) Caution when thundering, and being flash of lightening. It causes a fire or electric shock. Take the power

plug off when thundering. Do not touch cable and device when thundering and being flash of lightening.
(10) Do avoid the place where is moisture or has dust. Do not install the printer in where have lots of dust or

around humidifier. A fire can be occurred. A plug part need to clean well with dried fabric to remove dust.
If water drops are dripped on the place covered with dust, a fire can be occurred.

(11) Avoid direct sunlight. Do not install the printer near to window where directly contacts to the sunlight. If

the machine contacts sunlight long time, the machine cannot work properly because inner temperature
of the machine is getting higher. A fire can be caused.

(12) Turn off the power and take off the plug when a smoke, strange smell, or sound from the machine. If you

keep using it, a fire can be occurred.

(13) Do not insert steel or metal piece inside/outside of the machine. Do not put steel or metal piece into a

ventilator. An electric shock could be happened.

1-3

Precautions

Service Manual

1.2.3 Precaution related handling the machine.

If you ignore this information, you could get harm and machine could be damaged.

(1) Do not install it on the different levels, or slanted floor.

Please confirm whether it is balanced or not after installation. If it is unbalanced, an accident can be hap­pened due to the machine fell over.

(2) Be careful not to insert a finger or hair in the rotating unit.

Be careful not to insert a finger of hair in the rotating unit (motor, fan, paper feeding part, etc) while the
machine is operating. Once it happens, you could harm.

(3) Do not place a pot contains water/chemical or small metals. If those are got into the inner side of machine,

a fire or electric shock can be occurred.

(4) Do not install it in where lots of moisture or dust exists or where raindrop reaches. Afire or electric shock

can be caused.

(5) Do not place a candlelight, burning cigarette, and etc. on the machine. Do not install it near to heater. A

fire can be occurred.

1.2.4 Precaution when assembly/disassembly

When replace parts, do it very carefully. Do memorize the location of each cable before replace parts for
reconnecting it afterwards. Do memorize. Please perform the below before replace or disassembly the parts.

(1) Check the contents stored in the memory. All the information will be erased after replace main board. The

information needed to keep has to be written down.
(2) Before servicing or replacing electric parts, take off a plug.
(3) Take off printer cables and power code connected to printer.
(4) Do use formal parts and same standardized goods when replacing parts.Must check the product name,

part code, rated voltage, rated current, operating temperature, etc.
(5) Do not give an over-force when release or tighten up the plastic parts.
(6) Be careful not to drop the small parts such as screws in the printer.
(7) Be careful not to change the location of small parts such as screws when assembling and disassembling.
(8) Do remove dust or foreign matters completely to prevent fire of tracking, short, or etc.
(9) After finished repair, check the assembling state whether it is same as before the repair or not.

1-4

Precautions

Service Manual

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 available 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 assembly.

3. Use only a grounded tip soldering iron to solder or desolder ESDs.

4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static”
can generate electrical charges sufficient to damage ESDs.

5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to
damage ESDs.

6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most
replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a
comparable conductive material.

7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch
the protective material to the chassis or circuit assembly into which the device will be installed.

8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed,
until completely plugged or soldered into the circuit.

9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the
brushing together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electric­ity sufficient to damage an ESD.

1-5

Precautions

Service Manual

1.4 Tool for Troubleshooting

The following tools are recommended for safe and smooth troubleshooting described in this service manual.

DCU(Diagnostic Control Unit)

Standard : Test equipment to diagnose the Laser
printer supplied by Samsung Electronics.

1

Driver

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

M2 short).

4

Cotton Swab

Standard : For general home use, for medical ser-vice

6

Software(Driver) installation CD ROM

8

Cleaning Equipments a IPA(Isopropyl
Alcohol)dry cloth or a soft stuff neutral
detergent

7

Pinset

Standard : For general home use, small type.

5

DVM(Digital Volt Meter)

Standard : Indicates more than 3 digits.

2

Electronic Scale

Standard : Equipment to check the weight of con­sumables(toner cartridge) supplied by Samsung
Electronics. (The gram unit can be measured.)

3

Mind your hands not to be touched when you
disassemble and reassemble PBAASS'Y, such
as the main board, SMPS, HVPS.

2

2

2-1

Specifications

Service Manual

2. Specifications

2.1 General Specifications

ITEM DESCRIPTION

Print Technology Non-impact Electro-photograpic Printing
Developing system Non-Magnetic, Mono-Component Developing System
Print Speed

(1)

16 PPM : A4 size , 5% Character pattern
17 PPM : Letter size , 5% Character pattern

Resolution Phaser 3120 : True 600 X 600 DPI

Phaser 3130 : 1200 X 600 DPI
Source of Light Laser diode (LSU : Laser Scanner Unit)
Warm-Up Time Power-on boot : 30 seconds or less
First Print Out Time Less than 1 1 seconds (Ready to 1st page out)
Media Size 75 X 125 (3” X 5”) mm to 216 X 356 (8.5” X 14”)mm
Media Thickness 16 ~ 24 lb
Dimension(W X D X H) 348 X 355 X 193mm / 13.7 X 14 X 7.6 inch
Weight Net : 7 Kg /15.4 lb

Gross : 9.5 Kg (Max.)
Acoustic Noise

(1)

Stand by : Less than 35 dB

Printing: Less than 50 dB
Machine Life 120,000 Sheets
Periodic Replacing Parts

(2)

Pick Up Roller : 60,000 Sheets

Feed Roller : 60,000 Sheets

Transfer Roller: 60,000 Sheets

Fuser Assembly : 60,000 Sheets

(1)

For measuring the printing speed, count the papers which outputted within one minute from when the
second page starts to be printed. (A4, 5% character pattern standard)

(2)

The life span of the consumption parts can be checked by printing the demo page or the system list.
(Refer to the 6.3 Receive the service information)

2-2

Specifications

Service Manual

2.3 Electrical Specification

2.2 Controller Specification

ITEM

DESCRIPTION

Phaser 3120 Phaser 3130

Processor(CPU) Samsung Jupiter4 90MHz Samsung SPGPm 166MHz
OS Compatibility

(1)

Win 98x/NT4.0/ME/2000/XP,
Various Linux OS,Mac(Mac OS 8.6 ↑)

Memory FLASH ROM(PROGRAM) : 0.5MB flash

RAM : 8 MB RAM : 32 MB

EEPROM(NVRAM) : 512byte
Emulation SPL(Samsung Printer Language) PCL6, IBMProPrinter, EPSON
Interface USB 1.1 USB

- USB 2.0

- 12 Mbps 1 port

Parallel : IEEE 1284

- Modes supported :
Compatible,Nibble,Byte,ECP
External Network Adaptor(Optional)

Interface switching Automatic
Interface time-out 5min(Max.)
Font Windows Font 45 Scalable, 1 Bitmap

ITEM DESCRIPTION

Input Voltage Nominal input voltage 200-240 VAC / 100~127VAC

Input voltage range 189-264 VAC/ 90~132VAC
Nominal frequency 50/60 Hz
Frequency tolerance +3Hz

Power Consumption Printing : 280W Avg or less Power Save : 10W Avg or less

2.4 Environmental Range

ITEM OPERA TING STORAGE

Temperature 10~32

o

C(50-90 oF) -20~40 oC (-4~104 oF)

Humidity 20~80%RH 10~80%RH

(1) The SPL series model is USB exclusive use, so it supports the environment beyond the WIN 98.

2-3

Specifications

Service Manual

• Input capacity

Cassette: 250 sheets
Manual : 1 sheet

• Output capacity

Face Down : 50 sheets(20lb)
Face Up : 1 sheet(OHP, Lavbel, Cut Sheet, Envelope)

2-Paper Handling Specifications

Please refer to "Paper Specifications" on user guide

• Input Paper Size

2.5 TONER Cartridge (Developer)

ITEM DESCRIPTION REMARK

Life span 3,000 sheets IDC 5% pattern
Developing Non-magnetic Mono Conponent Contact Developing
Charging Conductive Roller Charging
Toner checking sensor Not Available
Ozone 0.1PPM or less 8 hours
Style Single cartridge

P APER DIMENSIONS WEIGHT

A4 210 X 297 mm 60 to 90 g/m2 bond(16 to 24 lb)
Letter 216 X 279(8.5 X 11")
Legal(Legal14") 216 X 356(8.5 X14")
JIS B5 182 X257mm (7.2 X 10")
Folio(Legal13") 216 X 330mm (8.5 X 13")

Minimum size (Custom) 76 X 127mm (3 X 5") 60 to 163 g/m2bond(16 to 43 lb)
Maximum size (Custom) 216 X 356mm (8.5 X 14")
Transparency(OHP) Same minimum and maximum Thickness:
Label paper sizes as listed above 0.10 X 0.14 mm (0.0039 X 0.0055")

Envelopes Up to 90 g/m2 bond(16 to 24 lb)

2-4

Specifications

Service Manual

3

3

3-1

Disassembly and Reassembly

Service Manual

3. Disassembly and Reassembly

3.1 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.

3-2

Disassembly and Reassembly

Service Manual

1. Pull the Cassette out of the printer.

2. Remove the Front Cover in the direction of
arrow.

3. Remove four screws.

4. Unlatch the front ends of the Top Cover.

5. Remove the Top Cover in the direction of arrow.

6. Remove the Rear Cover from the Top Cover.

Cassette

Top Cover

Rear Cover

Front Cover

3.2 Top Cover

3-3

Disassembly and Reassembly

Service Manual

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

- Top Cover(see page 3-2)

2. Unplug two connectors(Block) from the boards,
then remove four screws.

3. Remove two screws and take the Thermostat
out of the Fuser.

4. Remove two screws and take the Halogen
Lamp out of the Heat Roller.

5. Remove one screw and take the Idle Gear out.

6. Remove four screws and divide the Fuser into
two parts

7. Remove the Thermister from the Fuser Cover.

Idle Gear

Fuser Cover

Fuser Ass'y

Thermostat

Halogen Lamp

Heat Roller

3.3 Fuser

Thermister

3-4

Disassembly and Reassembly

Service Manual

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

- Top Cover(see page 3-2)

2.Remove the Exit Gear, Bearing and Exit Roller.

Exit Gear

Bearing

Exit Roller

1

2

3.4 Exit Roller

3.5 LSU

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

- Top Cover(see page 3-2)

2. Remove two screws and unplug one connector
from the Frame.

3. Remove the LED PBAAss’y as shown below.

4. Unplug two connector from the LSU

5. Unplug four screws and take the LSU out.

LSU

LED PBA Cover

3-5

Disassembly and Reassembly

Service Manual

1. Before you remove the Fuser, you should

remove:

- Top Cover(see page 3-2)

2. Unplug the connector from the SMPS and

remove the one screw. Then take out the Fan.

DC Fan

3.6 Fan

3.7 Driver Ass’y

1. Before you remove the Fuser, you should

remove:

- Top Cover(see page 3-2)

2. Remove the six screws from the Drive Ass’y.

3. Unplug one connector from the Driver Ass’y

Drive Ass'y

3-6

Disassembly and Reassembly

Service Manual

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

- Top Cover(see page 3-2)

- Fuser Connector(see page 3-3)

2. Remove the fourteen screws securing from the
Engine Shield Ass’y and unplug the all connec­tors. Then take the Engine Shield Ass’y.

Engine Shield
Ass'y

3.8 Engine Shield Ass’y

3.9 Main PBA

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

- Top Cover(see page 3-2)

- Engine Shield Ass’y(see page 3-6)

2. Unplug one connector and remove five screws
from the Main PBA. Then lift the Main PBA out,
as shown below.

Main PBA

3-7

Disassembly and Reassembly

Service Manual

3.10 SMPS

1. Before you remove the Fuser, you should

remove:

- Top Cover(see page 3-2)

- Engine Shield Ass’y(see page 3-6)

2. Unplug one connector and remove three screws

then take the Inlet Ass’y out.

3. Remove one screw and unplug one connector
from the Main PBA.

4. Remove three screws and take The SMPS out.

Inlet Bracket

SMPS

3-8

Disassembly and Reassembly

Service Manual

3.11 Transfer Roller

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

- Top Cover(see page 3-2)

- LSU(see page 3-4)

2. Remove three screws and take the Transfer
Earth out.

3. Unplug the PTL Holder Connector, then remove
the PTL Holder and PTL Lens, as shown below.

4. Unlatch the Bush and remove it. Then lift the
Transfer Roller out, as shown below.

Transfer
Earth

PTL
Holder

PTL
Lens

Transfer
Roller

Bush

5-11

Disassembly and Reassembly

Service Manual

3.12 Feed Roller

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

- Top Cover(see page 5-2)

- Drive Ass’y(see page 5-7)

2. Remove two screws from the Guide Paper and
take it out.

3. Pull up the Feed Idle Bush and Feed Idle Shaft,
as shown below.

4. Remove three screws from the Feed Bracket
and take it out.

5. Remove the Idle Gear and Feed Gear2.

6. Remove the Feed Gear 1 Ass’y, as shown
below.

7. Remove the Feed Roller and Feed Roller 1, as
shown below.

Guide paper

Bush

Feed Idle
Shaft

Feed Bracket

Feed Gear2

Idle Gear

Feed Gear1
Ass'y

Feed Roller1

Feed Roller

3-10

Disassembly and Reassembly

Service Manual

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

- Top Cover(see page 3-2)

- Drive Ass’y(see page 3-5)

- Engine Shield Ass’y(see page 3-6)

2. Remove the Pick up Gear Ass’y, as shown
below.

3. Remove the Pick up Ass’y, as shown below.

Pick up Gear
Ass'y

Pick up Ass'y

1

2

Bush

3.13 Pick Up Roller

3.14 Solenoid

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

- Top Cover(see page 3-2)

- Drive Ass’y(see page 3-5)

- Engine Shield Ass’y(see page 3-6)

- Pick Up Roller(see page 3-10)

2. Remove two screw then remove The Manual
Solenoid and Pick Up Solenoid.

(Pick up)
Solenoid

(Manual)
Solenoid

4-1

TROUBLESHOOTING

Service Manual

4

4

4. Troubleshooting

4.1 How to use DCU

4.1.1 DCU Setup

You can examine the malfunction of the printer. To perform DCU, open the front discharge cover and leave
the connect the harness wire(10 pin/4 pin) to the CN10(4 pin) of the Main control board.

ML SERIES DIAGNOSTIC CONTROL UNIT

04
05
07
08
09
10

DEV 300
LSU READY
PAPER EMPTY

COVER OPEN
COER HEATING

DEV 350
LSU MT & LD
PAPER WIDTH
EXIT SENSOR

PRINTING TEMP

DEV 350
LSU MOTOR
NEW CRU
FEED SENSOR

READY HEAT

ON

OFF

STATUS

SELF
TEST

DIAGNOSTIC

DIAGNOSTIC CODE

00
01
02
03
04
05
06
07
08
09
10
11

12
13

14

61

00
01
02
03
04

20
30
40
50

69



60
62
68
64
70
71
72
73
95

MAIN MOTOR OPERATING SYSTEM
MAIN HIGH-VOLTAGE ON
TRNSFER HIGH-VOLTAGE (-)ON
THV(+) REFERANCE VOLTAGE
DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON
LSU OPERATING SYSTEM
PICKUP CLUTCH ON
PEEMPTY/PWITH/NEW CRU TEST
FEED & EXIT SENSOR TEST
COVER OPEN SENSOR TEST
FUSER TEST
HOT BURN TEST

CLEAN MODE PRINT
THV(+)TRIGGER, ALL HV & FAN ON
THV(+) REFERENCE ON

ERROR STATUS CODE

STATUS CODE

WARM UP

READY (REGAL)
READY (LETTER)
READY (A4)
READY (EXECUTIVE)
READY (B5)

PRINT START
FEED SENSOR ON
FEED SENSOR OFF
PAPER OUT

SLEEP MODE

OPEN FUSER ERROR
LOW TEMPERATURE ERROR
OVER HEATING ERROR
COVER OPEN ERROR
NO PAPERR
PAPER JAM 0
PAPER JAM 1
PAPER JAM 2
LSU NOT READY

DIAGNOSTIC
MODE

DOWN

UP ENTER

SHIFT STOP

TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL
AND TURN THE PRINTER POWER ON.

4-2

TROUBLESHOOTING

Service Manual

4.1.2 Code

Connect DCU to the printer and turn the power on. It show 7 Segment FND on the panel and each code
tells the function of the printer.

1) Normal Code

While printing or warming up, it indicate the position of the paper

2) Error Code

When detecting the malfunction, the printing is stopped to indicate error code.

Code State Description

61 Warm up The printer is on, the cover is open or close.
00~05 Ready(kind of paper) The printer is ready, the paper is detected when the first paper is printed.

00: Legal ,01: Letter ,02: A4 ,03: EXEC ,04: B5 ,05: Folio, 06: A5/A6

20, 21, 22 Print Start The engine controller received the print order from the video controller.

20: 1st, 21: MP, 22: SCF
30 Feed Sensor On The paper is passing out of the Feed Sensor.
40 Feed Sensor off The paper has passed out of the Feed Sensor.
50 Paper Out The paper has passed out of Exit Sensor.
69 Sleep Mode The fuser power turned off to minimize the power consumption.

Code State Description

60, 62, 68 Fuser Error The error in the fuser occurred. There is a short circuit in the thermistor

and the thermostat while printing, Low Temperature Error occurs.

• 60: Open Fuser Error

• 62: Low Heat Error

• 68: Over Heat Error
64 Cover Open The Printer Cover is open.
65 CRU Error The Toner Cartridge not installed,
70 No Paper No paper in the paper cassette.
71 Paper Jam 0 The front part of paper is jammed between pickup unit and Feed sensor.
72 Paper Jam 1 The front part of paper is jammed between the Discharge sensor and

Feed sensor.

73 Paper Jam 2 The front part of paper is jammed just after passing through the discharge

sensor.
76 Out Bin Full The Out bin is filled with paper.
95 LSU Not Ready LSU Scanner Motor not ready or Hsync signal not output.

4-3

TROUBLESHOOTING

Service Manual

4.1.3 Self Diagnostic Mode

If Error code occurs due to malfunction of the printer, perform Self Diagnostic Mode to solve the problem.
The printer works only in the self-test mode to solve the malfunction problem.

To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same
time.
Release the button within 2 or 3 seconds if 78 shows in the DCU. If 00 shows in the DCU, press the button
[Up] or [Shift] to select the self+test , and press the button of [Enter] to operate. To stop, press the button of
[shift] and [Enter] together.

Code Description

00 Main Motor Operating System

Only the main motor is in operation.

01 Main High Voltage On(THV-)

-1400 voltage output by MHV terminal.

Caution : High voltage probe should be used.

02 Transfer High Voltage(-)On(THV-)

-1000 voltage output by MHV terminal.
Caution : High voltage probe should be used.

03 Transfer High Voltage (+)Reference on (THV +)

+800 voltage output by MHV terminal.

Caution : High voltage probe should be used.

04 DEV/supply High Voltage : DEV/Supply High Voltage Test.

The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply
high voltage output by each HV terminal(-500V). Press the [Up] button to switch the volt­age. The middle and right one of the three LEDs are on and -650 voltage output by DEV
HV terminal.

Caution : High voltage probe should be used.

05 LSU Operating System

The scanning motor of LSU is in operation, the right LED of the three buttons on. Press
the [Up] button to Check LD. LD is functioning and the middle button is on. If the LD is
normal, all LEDs are on.

06 Pickup clutch on

The Solenoid in the printer is in operation. To stop the operation, Press the button [shift]
and [Enter] together.

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Code Description

07 Paper Empty Sensor Test :

If activate the Actuator of the PEMPTY Sensor, the left and right of the three LEDs are
on.

Paper Empty Sensor ON/OFF 1st LED ON/OFF

08 Feed & Exit Sensor Test

Test the Feed sensor and Discharge sensor in the same way as '07'.
Feed Sensor ON/OFF 2nd LED ON/OFF
Exit Sensor ON/OFF 3rd LED ON/OFF

09 Cover Open Sensor Test

Test the Cover Open Sensor in th same way as code '07’
Cover Open Sensor ON/OFF 1st LED ON/OFF

10 Fuser Test

If the [Enter] button pressed, the right LED is on and temperature of the fuser is up to
READY Mode. If the [Up] button pressed, the middle LED is on and temperature of the
fuser is up to Printing Mode.
If you press the button once more, the left LED is on and temperature of the fuser is up
to overheat Mode.

11 Hot Burn Test

If the [enter] button pressed, the printer is continuously printing without detection.
Turn the power off to stop operation.

12 Cleaning Mode Print Mode

Print the paper to clean the OPC Drum in the Cartridge.

13 THV(+) TRIGGER. ALL HV :

All high voltage output by each HV terminal and LSU and the fan is in operation. In this
mode, electronic resistance of transfer roller and high voltage is detected.

14 PTL Test :

Indicates the function of the PTL, same method of the code ‘07’.

15 Fan Test :

Indicates the function of the Fan, same method of the code ‘07’.

16 Manual Pickup Test :

Indicates the function of th Manual Pickup, same method of the code ‘07’.

17 Manual Sensor Test :

Indicates the function of the Manual Sensor, same method of the code ‘07’.

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4.1.4 Self Test Button

If the Self-Test button pressed, vertical lines are printed.
Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After

warming-up the printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection,
the printer begins printing(trial printing and data from the PC). It is convenient to use this mode when the
engine malfunction is detected in the control board.

No. Function Enter Up/ Dow n Stop Remark

00

Mot or

Motor Run Motor Stop

01

MHV

Mhv On Mhv Off -1550V

02

THV(-)

Thv Negative On Thv Negative Off

03

THV(+)

Thv On Thv Off +1300V

04

DEV

Dev On

Supply DEV

Dev Of f

0:-630V 0:-430V

05

LSU

LSU Run

On Off Ready

LSU Stop

06

PickUp

Pickup On Pickup Off

07

PEmpty

Paper Empty

08

Sensor

Exi t Feed

09

Cover

Cover Open

10

Fuser

Fuser On Fuser Off

11

HotB urn

HotBurn O n

12

Clean Print

Clean Printing

13

Thv

Ref erence

low adequate high

14

PTL

PTL On PTL Off

15

FAN

Fan On Fan Off

16

Man ual
PickUp

Manual Pickup On Manual Pickup Off

17

Man ual
Sensor

Manual Sensor

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4.2 Bad image

4.2.1 Vertical Black Line and Band

• Description

1. Straight thin black vertical line occurs in the printing.

2. Dark black vertical band occur in the printing.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1. Damaged develop roller in the Developer.
Deformed Doctor-blade or cleaning­blade.

2. Scratched surface of the discharge roller
in the developer.

3. Partly depression or deformation on the
surface of the transfer roller.

1. If causes 1 and 2 occur in the developer
cartridge, replace the developer and try to
print out.

2. Replace the transfer roller if occurred as
No. 3.

4.2.2 Vertical White Line

• Description White vertical voids in the image.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1. Foreign matter stuck onto the window of
internal lenses of LSU mirror.

2. Foreign matter or toner particles between
the developer roller and blade.
(In case the life of the developer has
been expired, white lines or light image
occur in front of the image.)

3. It may occur when Burr and foreign sub­stances are on the window of the devel­oper frame.

4. If the fuser is defective, voids occur peri­odically at the top of a black image.

1. Foreign matter stuck onto the window :
Clean the LSU window with recommend­ed cleaner(IPA) Clean the window with a
clean cotton swab.

2. Foreign matter in the LSU : Open the
cover of LSU and clean with a cotton
swab on the surface of the reflex mirror.

3. No 3. : Remove the foreign matter and
burr of the exposure window.
(Developer cartridge)

4. No. 4. : Open the front cover and check
ribs that corresponds to the position of
the voids. Remove if found.

5. If the problems are not solved, replace
the developer cartridge.

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4.2.3 Horizontal Black Band

• Description

1. Dark or blurry horizontal stripes occur in the printing periodically.
(They may not occur periodically.)

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1. Bad contacts of the voltage terminals to
developer.

2. The rollers of developer may be stained.
Charge roller = 37.7mm
Supply roller = 37mm
Develop roller = 35.3mm
Transfer roller = 45.3mm

1. Clean each voltage terminal of the Charge,
Supply, Develop and Transfer roller.

(remove the toner particles and paper par­ticles)

2. Clean the right Gear that has relatively
small gap of the teeth in the OPC.

3. If the malfunction persists, replace the
developer.

4.2.4 Black/White Spot

• Description

1. Dark or blurry black spots occur periodically in the printing.

2. White spots occur periodically in the printing.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1. If dark or blurry black spots occur periodi­cally, the rollers in the Developer may be
contaminated with foreign matte or paper
particles.
( 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.

3. If a black image is partially broken, the
transfer voltage is abnormal or the trans­fer roller's life has expired.

1. Run OPC cleaning Mode Print and run the
Self-test 2 or 3 times.

2. In case of 75.5 mm interval unremovable in
1, cleanly remove foreign substances stuck
on the OPC location equivalent to black
spots and white spots with a dry duster.

3. The transfer roller guarantees 60.000
sheets printing. If the roller's life is expired,
replace it.

4. In case of 37.7 mm interval unremovable in
1, take measures as to replace the develop­er cartridge and try to print out.

5. Clean the inside of the set against the paper
particles and foreign matter in order not to
cause the trouble.

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4.2.5 Light Image

• Description The printed image is light, with no ghost.

Digital Printer
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Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1. Develop roller is stained when the toner
of developer cartridge is almost con­sumed.

2. Ambient temperature is below than 10°C.

3. Bad contact caused by the toner stains
between the high voltage terminal in the
HVPS and the one in the set.

4. Abnormal output from the HVPS.

1. Check if the Toner Save mode is off.

2. R

eplace the developer cartridge and try to

print out.

3. Wait 30 minutes after printer is powered on
before you start printing.

4. Clean up the contaminated area by the
toner.

5. Replace the HVPS if the problems are not
solved by the above four directions.

4.2.6 Dark Image or a Black

• Description The printed image is dark.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1. No charge voltage in the engine board.
( Perform DCU diagnostic code 01)

2. Charge voltage is not turned on due to
the bad contacts between power supply
in the side of the Developer and charge
terminal of HVPS.

1. Clean the high voltage charge terminal.

2. Check the state of the connector which
connects the engine board and HVPS.

3. Replace the HVPS if not solved by the
above direction 1 and 2.

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4.2.7 Uneven Density

• Description Print density is uneven between left and right.

Check and Cause Solution

1. The pressure force on the left and right
springs of the transfer roller is not even,
the springs are damaged, the transfer
roller is improperly installed, or the trans­fer roller bushing or holder is damaged.

2. The toner level is not even on the devel­oper roller due to the bad blade.

1. Replace both the left and right Spring
Holder.

2. Occur in the developer cartridge, replace
the developer and try to print out.

4.2.8 Background

• Description Light dark background appears in whole area of the printing.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1.

Does character exist less than 2%
per a page, and hasn’t it been used
long time?

2.

Does recycle paper be used?

3.

Has the life span of the developer
ended?

4.

Is the movement(Up and Down) of
the transfer roller smooth?

5. Is the HVPS normal?

1.

The toner cartridge is basically
designed to print 3,000 sheets with
5% image. If it prints more than
3,000 sheets (around 5,000 sheets)
with 2% image, a background can be
occurred.

2.

The B/S is not guaranteed if using
recycle paper.

3.

Replace the developer when the life
span of it has been ended.

4.

Clean the bushing part of the transfer
roller.

5. If the problem is still not solved,

replace the developer.

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4.2.9 Ghost (1)

• Description Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.

Digital Printer
Digital Printer
Digital Printer

Digital Printer
Digital Printer
Digital Printer

75.5mm

Check and Cause Solution

1. Bad contacts caused by contamination
from toner particles between high voltage
terminal in the main body and the elec­trode of the Developer.

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. The life of developer is expired.

4. Transfer roller lifetime(60.000 sheets) has
expired.

5. Abnormal low temperature(below 10°C).

1. Clean the terminals when contaminated by
toner particles.

2. Occur in the developer cartridge, replace
the developer and try to print out.

3. Replace the engine board if not solved by
the above directions 1-2.

4. If not solved by the direction 3, check the
transfer roller lifetime and replace it.

5. Wait about 1 hour after power on before
using printer.

4.2.10 Ghost (2)

• Description

Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.
(When printing on card stock or transparencies using manual feeder)

Digital Printer
Digital Printer
Digital Printer

Digital Printer
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Digital Printer

75.5mm

Check and Cause Solution

When printing on card stock thicker than nor­mal paper or transparencies such as OHP,
higher transfer voltage is required.

Select 'Thick Mode' on paper type menu from
the software application and after using return­ing to the original mode is recommended.

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4.2.11 Ghost (3)

• Description White ghost occurs in the black image printing at 32mm intervals.

Digital Printer
Digital Printer
Digital Printer

Digital Printer
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Digital Printer

37mm

Check and Cause Solution

1. The life of the developer may be expired.

2. The abnormal voltage and bad contact of
the terminal of the supply roller

1. Occur in the developer cartridge, replace
the developer and try to print out.

2. Check the approved voltage of the supply
roller and contact of the terminal and adjust
if necessary.

4.2.12 Ghost (4)

• Description Ghost occurs at 47 mm intervals.

Digital Printer
Digital Printer
Digital Printer

Digital Printer
Digital Printer
Digital Printer

47mm

Check and Cause Solution

The temperature of the fuser is maintained
high.

1. Disassemble the fuser and remove the
contaminated toner particles on the roller
and clean the foreign matter between
Thermistor and Heat roller.
( Caution : can be deformed)

4.2.13 Satins on the Face of Page

• Description The background on the face of the printed page is stained.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1. Toner leakage due to improperly sealed
developer.

2. If the transfer roller is contaminated, satins
on the face of page will occur.

1. Replace the developer cartridge.

2. If the transfer roller is contaminated, run PC
Cleaning Mode Print 2 or 3 times.
And perform Self-Test 2 or 3 times to
remove contamination.

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4.2.14 Satins on Back of Page

• Description The back of the page is stained at 47 mm intervals.

Digital
Digital Pri
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

1. Transfer roller is contaminated.

2. Pressure roller is contaminated.

1. Perform the OPC Cleaning Mode Print 2 or
3 times. Run Self-Test to remove the conta­mination of the transfer roller.

2. Replace the transfer roller if contaminated
severely.

3. Disassemble the fuser and clean the
H/R(Heat Roller) and P/R(Pressure roller).
And check the area between H/R and
Thermistor. If contaminated, clean the area
not to be deformed.

4.2.15 Blank Page Print out (1)

• Description Blank page is printed.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Check and Cause Solution

Bad ground contacts in OPC and/or devel­oper.

Remove contamination of the terminals of the
developer and the unit.

4.2.16 Blank Page Print out (2)

• Description

1. Blank page is printed.

2. One or several blank pages are printed.

3. When the printer turns on, several blank pages print.

Check and Cause Solution

1. Bad ground contacts in OPC and/or
developer.

2. Abnormal solenoid.

1. Remove contamination of the terminals of
the developer.

2. Perform the engine self test using DCU to

check

if the Solenoid is normal.(refer to code 06)

3. If not solved by the above directions 1-2,
Replace the engine board.

4. Turn the power off, delete the data of PC
and try printing again.

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4.3.1 Wrong Print Position

• Description Printing begins at wrong position on the paper.

Check and Cause Solution

Wrong sense time caused by defective feed sensor
actuator.

Replace the defective actuator

Check and Cause Solution

1. Check the Solenoid by using DCU diagnostic mode

06.

2. Check if the pad is loose due to bad sealing of the
side-pad.

3. Check the surface of the roller-pickup for foreign mat­ter.

4. If the paper feeds into the printer rand Jam 0 occurs,
perform DCU to check feed-sensor of the engine
board.

1. Replace the solenoid.

2. Replace the side-pad Assembly Lor R, if necessary.

3. Clean with soft cloth dampened with IPA(Isopropyl
Alcohol) or water.

4. Replace the SMPS-HVPS and/or Sensor.

4.3.2 JAM 0

• Description

1. Paper is not exited from the cassette.

2. Jam-0 occurs if the paper feeds into the printer.

PTL

P

I

C

K

/

R

PR

CR

DR

SR

TR FR

Empty Sensor

OPC

L S U

Fuser

Toner Cartridge

EXIT
Sensor

Feed

Sensor

MP Sensor

4.3 bad discharge

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Service Manual

Check and Cause Solution

1. If the recording paper is jammed in front of or inside
the fuser. (Perform DCU diagnostic code 08)

2. If the recording paper is stuck in the discharge roller
and the fuser just after passing through the Actuator­Feed, Feed Actuator may be defective.

1. Replace the SMPS.

2. Reassemble the Actuator-Feed and Spring-Actuator
if the returning is bad.

4.3.3 JAM 1

• Description

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.

PTL

P

I

C

K

/

R

PR

CR

DR

SR

TR FR

Empty Sensor

OPC

L S U

Fuser

Toner Cartridge

EXIT
Sensor

Feed

Sensor

MP Sensor

Check and Cause Solution

1. If the paper is completely fed out of the printer, but Jam
2 occurs : Exit sensor is defective.

• After the paper is completely discharged, actuator
Exit should return to the original position to shut the
photo-sensor. Sometimes it takes longer hour than it
should and does not return.

2. If the paper is rolled in the Fuser Roller:

• This occurs when a Guide claw is broken away or
transformed.

• It occurs when the Spring of a Guide claw is broken
away or transformed.

• It occurs when the Heat-Roller or Pressure-Roller is
seriously contaminated with the toner.

3. Paper is accordion in the fuser.

1. Check if the exit sensor actuator is defective.

• Check if the actuator exit is unformed (Check if the
lever part is unformed in shape).

• Check whether burrs occur in the assembly part of
the actuator exit or not and if the actuator is
smoothly operated.

• Check if foreign matters and wire get caught in the
actuator exit's operation.

2. If the paper is stuck in the fuser : disassemble the
fuser and remove the jammed paper, and clean the
surface of the pressure roller with dry gauze.

3. Remove the jammed paper after disassembling the

fuser : Clean the surface of the pressure roller with
dry gauze.

• Remove the toner particles stained on the rib.

• Check the assemblage and performance of the exit.

4.3.4 JAM 2

• Description

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.

PTL

P

I

C

K

/

R

PR

CR

DR

SR

TR FR

Empty Sensor

OPC

L S U

Fuser

Toner Cartridge

EXIT
Sensor

Feed

Sensor

MP Sensor

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4.3.5 Multi-Feeding

• Description Multiple sheets of paper are fed at once.

Check and Cause Solution

1. Solenoid malfunction(the solenoid does not work
properly): Perform DCU Diagnostic Code 06.

2. Pad-Friction is contaminated with foreign matter.(oil...)

3. The face of paper is blended.

1. Replace the solenoid if necessary.

2. Clean the pad friction with soft clothe dampened
with IPA(Isopropyl Alcohol).

3. Use the smooth paper.

4.3.6 Paper rolled in the Fuser

• Description If contaminated at intervals of 57mm on the back of a paper.

Check and Cause Solution

1.

Contamination of the pressure roller or heat
roller (Background, Hot off set).

2.

Check the claw of the fuser whether it is unfit­ted.

1.

After disassembling the fuser, clean contami­nation between the heat roller and the ther­mostor and remove the contamination of the
pressure roller.

2.

If there is heavy background, repair it by the
background troubleshooting method.

3. The surface of the heat roller with IPA or

water

4. Check the warp or separation of the sprint

claw and the holder plate claw, and then man­age it.

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4.3.7 Paper rolled in the Toner Cartridge (OPC Drum)

• Description Paper is rolled up in the OPC.

Check and Cause Solution

1. Paper is too much thin.

2. The face of paper is curled.

1. Recommend to use normal paper.

2. How to remove the rolled in the OPC Drum.

• Remove the paper while turning the OPC
Drum against the ongoing direction.

• C;eam fomger[romts on the OPC Drum
spft;u with IPA(Isopropyl Alcohol) or tissue.

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4.4 Malfunction

4.4.1 All LEDs blinking (Fuser Error)

• Description

1. All the lamps on the operator panel blink.

2. Gear of the fuser does not work and breaks away melt away.
When printing, motor breaks away from its place due to defective fuser gear.

Check and Cause Solution

1. Check if the thermostat, AC wire and Heat Lamp is
open.

2. Check if the thermistor sensor is in place.

3. Check if the heat lamp works properly.

4. Check if the overheat circuit works properly.

5. The fuser gear is defective due to melting away.

1. If the thermostat is open replace the fuser and
check following items.

2. If the thermistor sensor device is located deep in the
sponge, replace the fuser.

3. Check if the circuit of overheat mode works properly.

4. Run DCU mode : Perform DCU diagnostic code 10.

5. Replace Fuser.

4.4.2 All LEDs blinking (Scan Error)

• Description

1. All lamps on the operator panel blink.

Check and Cause Solution

DCU Mode : Perform DCU diagnostic code 05. If the DCU
error code 95 is displayed, replace LSU.

Replace LSU.

If you cannot solve the problem after you replace LSU,
replace the main board.

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4.4.3 Not function of the gear of the fuser due to melting away

• Description

The motor breaks away from its place due to gear melting away.

Check and Cause Solution

DCU Mode : Check if the Error States '60' '62' '68' occur.

Check the operation of Fuser Erasing Lamp
On/Off with the Error Code Check -10-.

1. Replace the Fuser.

2. Replace the Main Control board.

4.4.4 Paper Empty

• Description

The paper lamp on the operator panel is on even when paper is loaded in the cassette.

Check and Cause Solution

1. Bending or deformation of the actuator of the paper sen­sor.

2. The function of the engine board is defective Perform
DCU mode : Perform DCU diagnostic code 8.

1. Replace the defective actuator.

2. Replace the engine board.

4.4.5 Paper Empty without indication

• Description

The paper lamp on the operator panel does not come on when the paper cassette is empty.

Check and Cause Solution

1. Bending or deformation of the actuator of the paper sen­sor.

2. The function of the engine board is defective Perform.
DCU mode : Perform DCU diagnostic code 8.

1. Replace the defective actuator.

2. Replace the engine board.

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4.4.6 Cover Open

• Description

The ERROR lamp is on even when the print cover is closed.

Check and Cause Solution

1. The Hook Lever in the top cover may be defective.

2. Check the connector (Engine B’d↔HVPS) and circuit of

the cover switch department in the Main Control board.
Perform DCU mode : If Error state '64' occurs, Check the
related codes of the Cover Open Error.

1. Replace the hook lever, if defective.

2. Check the insertion of the Cover Open S/W
Connect.

3. Replace the Main Control board or Cover Open
S/W.

4.4.7 No lamp on when the cover is open

• Description

The ERROR lamp does not come on even when the printer cover is open

Check and Cause Solution

1. Check the connector(CN8) and circuit of the cover switch
department in the Main Control board. Perform DCU
mode : If Error state '64' occurs, Check the related codes
of the Cover Open Error

1. Check the insertion of the Cover Open S/W
Connect.

2. Replace the Main Control board or Cover Open
S/W.

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4.4.8 Defective motor operation

• Description

Main motor is not driving when printing, and paper does not feed into the printer, resulting 'Jam 0'.

Check and Cause Solution

1. Motor harness or sub PCB may be defective.

2. Perform DCU diagnostic code 00 and Check the motor
operation.

1. Check the motor harness, replace it, if defective.

2. Replace the SMPS, if necessary.

4.4.9 No Power

• Description

When system power is turned on, all lamps on the operator panel do not come on.

Check and Cause Solution

1. Check if the power input and SMPS output are normal.

2. Check the inferiority of LED-Panel on the front-cover if
the LED of Panel does not appear after normal warming­up.

1. Replace the power supply cord or SMPS.

2. Replace the control board.

3. Replace the LED-panel.

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4.4.10 Vertical Line Getting Curved

• Description

When printing, vertical line gets curved.

Check and Cause Solution

1. If the supply of +24v is unstable in the Main Control board

linking with LSU, check drive by DCU Mode : LSU Check

-05- LSU Motor on.

1. Replace LSU.

2. Replace the Main Control board.

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4.5 Toner Cartridge Service

It is not guaranteed for the default caused by using other toner cartridge other than the cartridge supplied
by the Samsung Electronic or caused by non-licensed refill production.

4.5.1 Precautions on Safe-keeping of Toner Cartridge

Excessive exposure to direct light more than a few minutes may cause damage to the cartridge.

4.5.2 Service for the Life of Toner Cartridge

If the printed image is light due to the life of the toner, you can temporarily improve the print quality by
redistributing the toner(Shake the toner cartridge), however, you should replace the toner cartridge to solve
the problem thoroughly.

4.5.3 Redistributing Toner

When toner is low, faded or light areas may appear on a printed page. You may be able to temporarily
improve the print quality by redistributing the toner. The following procedures may allow you to finish the
current print job before replacing the toner cartridge.

1) Grasp the front cover and pull it toward you to

open.

2) Remove the toner cartridge from the printer

3) Gently shake the toner cartridge from side to side
five or six times to redistribute the toner.

4) Reinsert the toner cartridge into the printer.
Ensure that the toner cartridge snaps into place.

5) Close the front cover. Make sure that the cover is
securely closed.

1.7

Note :

Avoid reaching too far into the printer. The fusing
area may be hot.
To prevent damage to the toner cartridge, do not

expose it to light for more than a few minutes.

Note :

If the toner gets on your clothing, wipe it off with a dry
cloth and wash clothing in cold water. Hot water sets
toner into fabric.

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4.5.4 Signs and Measures at Poor toner cartridge

Fault Signs Cause & Check Solution

Light image and
partially blank
image
(The life is ended.)

T oner
Contamination

• The printed image
is light or unclean
and untidy.

• Some part of the
image is not print­ed.

• Periodically a noise
as "tick tick" occurs.

• Toner is fallen on
the papers periodi­cally .

• Contaminated with
toner on prints part­ly or over the whole
surface.

1. If the image is light or unclean
and untidy printed image ­Shake the developer and
then recheck.

(1)NG : Check the weight of

the developer

(2)OK : Lack of toner, so the

life is nearly closed.

2. Some part of image is not
printed - Shake the develop­er and then recheck.

(1)NG : Check the weight of

the developer and
clean the LSU window
with a cotton swab,
then recheck.

(2)OK : Lack of toner, so the

life is nearly closed.

3. Periodically a noise as "tick
tick" occurs - Measure the
cycle and the weight of the
developer.

4. White vertical stripes on the
whole screen or partly :
Check the weight of the
developer.

1. Toner is fallen on the paper
periodically .

(1)Check the cycle of the

falling of the toner.

(2)Check the appearance of

both ends of the developer
OPC drum.

2.The center of the printed mat-

ter is contaminated with toner.

(1)Check whether foreign sub-

stances or toner are stuck
to the terminal (contact
point) of the developer.

(2)Check whether the state of

the terminal assembly is
normal.

1. All of 1, 2, 3 above­If it become better by shaking,
replace with a new developer
after 35.3-100 sheets in the
closing state of the life span.

2. In case of 2-

If it becomes better after clean­ing the LSU window, then the
developer is normal.
(Because of foreign substance
on the LSU window, the image
has not been printed partly.)

3. In case of 3-

If the cycle of noise is about 2
seconds, the toner inside the
developer has been nearly
exhausted.( Purchase and
replace with a new developer
after using about 200 sheets at
the point of occurrence)

4. In case of 3-

This is a phenomenon caused
by lack of toner, so replace with
a new developer.

1. If both ends of the OPC drum
are contaminated with toner:

Check the life of the developer.

2. Check whether it could be recy­cled.

3. If it cannot be recycled:

Replace the developer.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

4-24

TROUBLESHOOTING

Service Manual

Fault Signs Cause & Check Solution

White Black spot

Recycled product

• Light or dark black
dots on the image
occur periodically.

• White spots occur
in the image period­ically .

• Poor appearance of
the developer.

• Unclean and rough
printouts.

• Bad background in
the image.

1. If light or dark periodical black
dots occur, this is because the
developer rollers are contami­nated with foreign substance
or paper particles.

(1)37.7mm interval : Charged

roller

(2)75.5mm interval : OPC cycle

2. If white spots occur in a black

image at intervals of 75.5mm,
or black spots occur else­where, the OPC drum is dam­aged or foreign substance is
stuck to the surface.

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.

1. Poor appearance of the devel­oper.

(1)Check the damage to label

and whether different materi­als are used.

(2)Check the appearance of

parts of the developer, such
as frame, hopper.

2. Unclean and rough printouts.

(1)Check whether foreign sub-

stance or toner are stuck to
the terminal (contact point) of
the developer.

(2)Check whether the state of

the terminal assembly is nor­mal.

1. In case of 1 above ­Run OPC Cleaning Mode Print
4-5 times repeatedly to remove.
Especially check foreign sub­stance on the OPC surface, then
remove them with a clean gauze
moistened with IPA(Isopropyl
Alcohol) not to damage OPC if
necessary .

Never use usual alcohol.

2. In case of 2

If they are not disappeared by
running OPC Cleaning Mode
Print 4-5 times.

:

at intervals of 37.7mm

- Replace

the developer.

: at intervals of 75.5mm - Remove

foreign substance.

: Broken image - Replace the

developer according to careless­ness.

3. In case of 3 - Exchange the

transfer roller because the life of
the transfer roller in use has been
expired. (Check the transfer volt­age and readjust if different.)

1. In case of 1 -

(1)If there is an evidence of disas-

sembling the developer.

(2)If materials other than normal

parts of the developer are
added or substituted.

2. In case of 2 - If there are any

abnormals in connection with the
situation of 1.

(1)It occurs when the developer

is recycled over 2 times.

(2)If toner nearly being expired

are collected to use, it is
judged as the recycled devel­oper.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

4-25

TROUBLESHOOTING

Service Manual

4.6 Bad Environment of The Software

4.6.1 The printer is not working (1)

• Description

While Power turned on, the printer is not working in the printing mode.

Check and Cause Solution

1. Run Self-Test Mode : Turn the power on while pressing
the test printing button for 2 or 3 seconds before printing
works.

2. Check if the PC and the printer is properly connected
and the toner cartridge installed.

3. Printing is nor working in the Windows.

4. Check if the printer cable is directly connected to periph­eral devices

1.Check the power of the printer and perform the Self­Test. If the test printing works, that means no prob­lems in the printer itself. If the test printing does not
work, that means bad functioning of the printer(not
because of software). Perform DCU to check the
Error Status.

2. Replace the printer cable. If the problems not solved

even after the cable replaced, check the amount of
the remaining tone.
(refer to Toner Cartridge Service 7.4)

3. Check if the connection between PC and printer port

is proper. If you use windows, check if the printer dri ­ver in the controller is set up. If the printer driver is
properly set up, check in which program the printing
is not working. The best way to find out is to open the
memo pad to check the function of printing. If it is not
working in a certain program, adjust the setup the
program requires. Sometimes, the printout is normal
within the Windows basic programs, but it's not work­ing in a particular program. In such case, install the
new driver again. If not working in the Windows basic
program, Check the setup of the port of CMOS is on
ECP. And check the address of IRQ 7 and 378

4. If the scanner needs to be connected to the printer,

first the remove the scanner from the PC to see if the
printer is properly working alone.

4-26

TROUBLESHOOTING

Service Manual

4.6.2 The printer is not working (2)

• Description

After receiving the printing order, no response at all or the low speed of printing
occurs due to wrong setup of the environment rather than malfunction of the printer itself.

Check and Cause Solution

1. Secure more space of the hard disk.

2. Printing error occurs even if there is enough space in
the hard disk.

3. Check the parallel-port-related items in the CMOS
Setup.

4. Reboot the system to print.

1. Not working with the message 'insufficient printer
memory' means hard disk space problem rather than
the RAM problem. In this case, provide more space
for the hard disk. Secure more space using the disk
utilities program.

2. The connection of the cable and printer port is not
proper. Check if the connection is properly done and
if the parallel port in CMOS is rightly set up.

3. As a printer port, Select ECP or SPP among
SPP(Normal), ECP, and EPP modes(increase print­ing speed) SPP normal mode support 8-bit data
transfer, while ECPMode transfer the 12-bit data.

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.

4-27

TROUBLESHOOTING

Service Manual

4.6.3 Abnormal Printing

• Description

The printing is not working properly even when the cable has no problem.
(even after the cable is replaced)
If the printer won't work at all or the strange fonts are repeated, the printer driver may be defec­tive or wrong setup in the CMOS Setup.

Check and Cause Solution

1. Set up the parallel port in the CMOS SETUP.

2. Printer Driver Error.

3. Error message from insufficient memory.
(The printing job sometimes stops or due to insufficient
virtual memory, but it actually comes from the insuffi­cient space of the hard disk.)

1. Select SPP(Normal) or ECP LPT Port the among
ECP, EPP or SPP in the CMOS Setup.

2. Check the printer in My Computer.(to see if the
printer driver is compatible to the present driver or
delete

the old driver, if defective and reinstall the new

driver)

3. Delete the unnecessary files to secure enough
space of the hard disk and start printing job again.

4-28

TROUBLESHOOTING

Service Manual

4.6.4 SPOOL Error

• Description

To spool which stands for "simultaneous peripheral operations online" a computer document or
task list (or "job") is to read it in and store it, usually on a hard disk or larger storage medium so
that it can be printed or otherwise processed at a more convenient time (for example, when a
printer is finished printing its current document).

Check and Cause Solution

1. Insufficient space of the hard disk in the directory
assigned for the basic spool.

2. If the previous printing error not solved.

3. When expected to collide with other program.

4. When an application program or the printer driver is
damaged.

5. When some files related to OS are damaged or virus
infected.

6. Memory is less than suggested one.

1. Delete the unnecessary files to provide more space
to start printing job.

2. If there are some files with the extension name of
****.jnl, Delete them and Reboot the Windows to
restart printing job.

3. Shut down all other programs except the current
one, if possible.

4. Delete the printer driver completely and reinstall it.

5 After rebooting the computer, check for viruses,

restore the damaged files and reinstall the program
to do the printing job.

6. Add up enough memory to the PC.

How to delete the data in the spool manager.

In the spool manager, the installed drivers and the list of the documents waiting to be printed are shown.
Select the document to be deleted and check the delete menu.

If you intend to delete the current document being printed, the data being transferred to the printer will be put
out and then the document is removed. Before choosing the document, the menu is still inactive.

Or put the document out of the list and repeat the routine as in the above or finish the spool manager.

5

5

5-1

EXPLODED VIEWS AND PARTS LIST

Service Manual

5. Exploded Views and Parts List

5.1 Main Assembly Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-2)

5.2 Frame Assembly Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-4)

5.3 Drive Unit Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-7)

5.4 Fuser Unit Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-8)

5.5 Cassette Unit Exploded view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page(5-10)

Update on January .10.2003 by SEC

5-2

EXPLODED VIEWS AND PARTS LIST

Service Manual

5.1 Main Assembly Exploded view

0

9

6

7

8

2-2

2-3

2-4

2-5

2-6

2-6

15-1

15-2

5

2-1

2-7

2-10

1

2

10

4

11-1

11

11-2

11-3

11-4

11-5

11-3

12

13

14-1

14-2

14-3

14

14-4

3

15

5-3

EXPLODED VIEWS AND PARTS LIST

Service Manual

< Main Assembly Parts List >

SA. : Service Available

NO DESCRIPTION SEC CODE Q’TY SA REMARK

0 SET
1 ELA UNIT-FRAME LOWER, 110V, XRX JC96-02732A 1 O 110V

ELA UNIT-FRAME LOWER, 220V, XRX JC96-02734A 1 O 220V

2 ELA HOU-COVER TOP JC97-01748D 1 O

2-1 LENS LED-LED JC67-00026A 1 X
2-2 COVER-TOP JC63-00102A 1 X
2-3 COVER-REAR JC63-00101A 1 X
2-4 PMO-STACKER_RX JC72-00973A 1 X
2-5 PMO-BUSHING_F/DOWN JC72-00387A 1 X
2-6 PMO-SUB STACKER JC72-01001A 1 X
2-7 SPRING-KEY 6107-001169 1 X
2-8 KEY-ON LINE JC64-00039A 1 X

2-9 SCREW-TIPTITE 6003-000264 2 X
3 PLATE-P-CHANNEL JC61-00606A 1 O
4 CBF HARNESS-MOTOR JC39-00241A 1 O
5 FAN-DC JC31-00027A 1 O
6 UNIT-LSU JC59-00018A 1 O
7 PBA MAIN-P ANEL JC92-01439A 1 O
8 COVER PCB-M-PCB JC63-00104A 1 O
9 CBF HARNESS-LSU 1400 JC39-00242A 1 O
10 ELA HOU-RX DRIVE 1400 JC96-02733A 1 O
11 MEA UNIT-COVER FRONT, XEROX JC97-01748D 1 O P3120

MEA UNIT-COVER FRONT, XEROX JC97-01749K 1 O P3130
11-1 COVER-FRONT JC63-00103A 1 X
11-2 ADJUST-MANUALL JC70-00302A 1 X
11-3 ADJUST RACK-MANUAL JC70-00304A 1 X
11-4 GEAR-RACK_PINION JC66-00387A 1 X
11-5 ADJUST-MANUALR JC70-00303A 1 X
11-6 SCREW-TIPTITE 6003-000264 3 X

12 MEA ETC-CASSETTE 1400 TBD 1 O
13 PBA MAIN-CONTROLLER,GDI JC92-01426B 1 O P3120

PBA MAIN-CONTROLLER,PCL JC92-01424B 1 O P3130

14 MEA ETC-SHIELD ENGINE JC96-02663A 1 X

14-1 CBF HARNESS-ENGINE JC39-00240A 1 O P3120

CBF HARNESS-ENGINE, JC39-00240B 1 O P3130
14-2 SMPS-HVPS JC44-00046A 1 O 110V

SMPS-HVPS JC44-00047A 1 O 220V
14-3 BRACKET-INLET JC61-00601A 1 O
14-4 SHIELD-ENGINE JC63-00107A 1 O
14-5 SCREW-TIPTITE 6003-000264 6 X
14-6 SCREW-TIPTITE 6003-000119 2 X
14-7 SCREW-TIPTITE 6003-000301 1 X

15 TRANSFER ROLLER ASS’Y TBD 1 O

15-1 ROLLER-TRANSFER ROLLER JC66-00528A 1 X
15-2 GEAR-TRANSFER JC66-00395A 1 X

O: Service available X: Service not available

5-4

EXPLODED VIEWS AND PARTS LIST

Service Manual

5.2 Frame Assembly Exploded view

0

1

2

4

3

5

6

7

12

6

9

53

9

51

13

14

15

16

17

57

18

19

20

20

21

22

23

24

25

26

37

31

27

28

29

29

30

58

58-1

58-2

58-3

58-4

58-5

58-6

58-6

58-4

40

41

56

42

44

53

45

46

47

48

59

59-1

59-2

59-3

59-4

50

52

52

54

55

11

10

8

35

36

Transfer Roller

38

60

39

43

32

34

33

49

49-3

49-2

49-1

5-5

EXPLODED VIEWS AND PARTS LIST

Service Manual

< Frame 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 ASSY JC96-02732A 1 X
1 FRAME-Base JC61-00579A 1 X
2 GUIDE-TR JC61-00607A 1 X
3 PLATE-SA W JC61-00604A 1 X
4 GUIDE-TR RIB JC61-00594A 1 X
5 GEAR-EXIT F/DOWN JC66-00038A 1 X
6 MEC-BEARING,EXIT JC75-10529A 2 X
7 ROLLER-EXIT_F/DOWN JC66-00378A 1 X
8 SPRING-EXIT_F/DOWN 6107-001 163 1 X
9 PMO-GEAR_EXIT_DRV16 JC72-00143A 2 X
10 HOLDER-EXIT_F/DOWN JC61-00582A 4 X
11 PMO-ROLLER_EXIT ,MAIN JC72-41081A 4 X
12 PMO-ROLLER_EXIT ,FR JC72-41082A 4 X
13 MEC-TERMINAL JC75-00049A 4 O
14 IPR-TERMINAL CON JC70-00312A 3 X
15 IPR-TERMINAL CR JC70-00313A 1 X
16 HOUSING-TERMINAL JC61-00592A 1 X
17 PMO-LOCKER CST JC72-00983A 1 X
18 PMO-ACTUATOR CVR OPEN JC72-00974A 1 O
19 PMO-PLATE GUIDE DEVE_R JC72-00985A 1 X
20 SPRING-GUIDE DEVE JC61-00038A 2 X
21 IPR-GROUND_ROLLER IDLE JC70-00315A 1 X
22 PMO-PLATE GUIDE DEVE_L JC72-00984A 1 X
23 PMO-ACTUATOR FEED JC72-00976A 1 O
24 PMO-ACTUATOR EMPTY JC72-00975A 1 O
25 PMO-ACTUATOR MANUAL JC72-00977A 1 O
26 IPR-GROUND EARTH TR JC70-00309A 1 X
27 SPRING-TR_R 6107-001162 1 X
28 ROLLER-FEED ROLLER1 JC66-00526A 1 X
29 PMO-BUSHING TX JC72-00382A 5 X
30 ROLLER-FEED JC66-00598A 1 O
31 SPRING-ACT ,MANUAL 6107-001165 1 X
32 IPR-EARTH TRANSFER JC70-00307A 1 X
33 HOLDER-PTL JC61-00583A 1 O
34 LENS-PTL JC67-00027A 1 O
35 BUSH-TR_L JC61-00588A 1 X
36 SPRING-TR_L JC61-00047A 1 X
37 SPRING-ACT_FEED 6107-001164 1 X
38 PMO-BUSHING TR_L JC72-00102A 1 X
39 IPR-GROUND FUSER JC70-00310A 1 X

5-6

EXPLODED VIEWS AND PARTS LIST

Service Manual

< Frame Assembly Parts List Cont. >

SA. : Service Available

O: Service available X: Service not available

NO DESCRIPTION SEC CODE Q’TY SA REMARK

40 SHAFT-FEED IDLE JC66-00527A 1 X
41 BUSH-FEED IDLE JC61-00585A 1 X
42 SPRING-FEED IDLE JC61-70958A 1 X
43 IPR-P_GROUND_DRIVE2 JC70-00335A 1 X
44 SPRING-CAM PICK-UP 6107-001170 1 X
45 CAM-PICK_UP JC66-00377A 1 X
46 IPR-GROUND DRIVE JC70-00308A 1 X
47 SOLENOID-HB (PICK-UP) JC33-00009A 1 O
48 SOLENOID-HB (MANUAL) JC33-00010A 1 O
49 TBD TBD 1 X

49-1 PMO-GEAR PICK_UP B JC72-00980A 1 X
49-2 PMO-GEAR PICK_UPA JC72-00979A 1 X
49-3 SPRING-PICK_UP GEAR 6107-001167 1 X

50 BRACKET-FEED JC61-00602A 1 X
51 IPR-GROUND TR JC70-00311A 1 X
52 SHAPT-FEED JC66-00398A 1 X
53 RING-CS 6044-000001 3 X
54 GEAR-FEED 2 JC66-00394A 1 X
55 GEAR-IDLE 23 JC66-00396A 1 X
56 GUIDE-PAPER JC61-00718A 1 X
57 RMO-RUBBER_FOOT JC73-00027A 2 X
58 PICK_UP ASS’Y TBD 1 O

58-1 BUSH-PICK_UP_L JC61-00586A 1 X
58-2 SHAFT-PICK_UP JC66-00399A 1 X
58-3 STOPPER-PICK_UP JC61-00593A 2 X
58-4 PMO-IDLE PICK_UP JC72-00982A 2 X
58-5 SPONGE-ROILLER PICK UP JC72-01231A 1 X
58-6 BUSH-PICK_UP_R JC61-00587A 1 X
58-7 HOUSING-PICK_UP JC61-00591A 1 X

59 CLUTCH ASS’Y(FEED ASS’Y) TBD 1 O

59-1 GEAR-FEED 1 JC66-00393A 1 X
59-2 PMO-COLLAR_SPRING JC72-00978A 1 X
59-3 SPRING-CLUTCH 6107-001164 1 X
59-4 PMO-HUB CLUTCH JC72-00981A 1 X

60 FUSER TBD 1 O

5-7

EXPLODED VIEWS AND PARTS LIST

Service Manual

5.3 Driver Unit Exploded view

0

1

2

3

4

4

5

6

7

8

9

HARNESS-MOTOR

5

< Driver Unit Parts List >

SA. : Service Available

O: Service available X: Service not available

NO DESCRIPTION SEC CODE Q’TY SA REMARK

0 ELA HOU-RX DRIVE 1400 JC96-02733A 1 O
1 BRACKET-GEAR 1400 JC61-00598A 1 X
2 GEAR-FUSER DRV JC66-00388A 1 X
3 GEAR-RDCN Z132/19 JC66-00391A 1 X
4 GEAR-PICK_UP DRV JC66-00389A 2 X
5 RING-E 6044-000231 2 X
6 BRACKET-MOTOR 1400 JC61-00599A 1 X
7 GEAR-RDCN Z7128 JC66-00390A 1 X
8 GEAR-RDCN Z7322 JC66-00392A 1 X
9 MOTOR STEP-7.5 JC31-00028A 1 X

5-8

EXPLODED VIEWS AND PARTS LIST

Service Manual

5.4 Fuser Unit Exploded view

0

1

2

3

4

5

32

32

6

33

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

31

22

23

24

25

26

27

30

28

29

5-9

EXPLODED VIEWS AND PARTS LIST

Service Manual

NO DESCRIPTION SEC CODE Q’TY SA REMARK

0 ELA HOU-FUSER 110V TBD 1 O 110V

ELA HOU-FUSER 220V TBD 1 O 220V

1 COVER-FUSER JC63-00105A 1 X
2 HOLDER-PLATE CLAW JC61-00584A 4 X
3 SPRING ETC-CLAW JC61-00064A 4 X
4 PMO-ROLLER EXIT JC72-60059A 2 X
5 SPRING-EXIT F_UP JC61-70976A 2 X
6 THERMOSTAT-150 JC47-00005A O
7 PMO-GEAR_EXIT_DRV16 JC72-00143A 1 X
8 GEAR-IDLE 23 JC66-00396A 1 X
9 RING-CS 6044-000001 1 X
10 GEAR-RDCN 2515 JC66-00397A 1 X
11 IPR-ELECTRODE_LAMP JC70-00275A 1 X
12 ELECTRODE-WIRE_L JC70-00450A 1 X
13 THERMISTER-NTC HF 1404-001298 1 O
14 ELECTRODE-WIRE_R JC70-00449A 1 X
15 CBF HARNESS-FUSER(110V) JC39-00239A 1 O 110V

CBF HARNESS-FUSER(220V) JC39-00238A 1 O 220V

16 GEAR-FUSER,Z37 JC66-00564A 1 O
17 BUSH-HR_L JC61-00589A 1 X
18 NPR-ROLLER_HEAT JC66-00601A 1 O
19 BUSH-HR_R JC61-00590A 1 X
20 LAMP-HALOGEN(110V) TBD 1 O 110V

LAMP-HALOGEN(220V) TBD 1 O 220V

21 ROLLER-EXIT F_UP JC66-00380A 1 X
22 ROLLER-PRESSURE JC66-00600A 1 O
23 BEARING-PRESSURE JC66-10901A 2 X
24 SPRING-PR(1400) 6107-001168 2 X
25 PMO-BUSHING TX JC72-00382A 3 X
26 HOLDER-ACTUATOR JC61-00581A 1 X
27 PMO-ACTUATOR_EXIT JC72-00987A 1 X
28 IPR-FRAME_FUSER JC70-00317A 1 X
29 GUIDE-INPUT JC61-00595A 1 X
31 RMO-RUBBER_EXIT JC73-00017A 2 X
33 LABEL(P)-CAUTION, HOT_FUSER JC68-30928D 1 X
30 SPRING ETC-ACT_EXIT 6107-001165 1 X
32 NUT-HEXAGON 6021-000222 5 X
?? NEW-CLAW ASSY TBD 1 X
?? PLATE-CLA W JC61-00605A 4 X

< Fuser Unit Parts List >

SA. : Service Available

O: Service available X: Service not available

5-10

EXPLODED VIEWS AND PARTS LIST

Service Manual

5.5 Cassette Unit Exploded view

0

1

2

3

4

5

5

6

7

8

9

10

11

12

13

14

15

16

18

17

5-11

EXPLODED VIEWS AND PARTS LIST

Service Manual

NO DESCRIPTION SEC CODE Q’TY SA REMARK

0 CASSETTE JC97-01750A 1 O
1 FRAME-CASSETTE JC61-00578A 1 X
2 PMO-EXTENSION LARGE JC72-00970A 1 X
3 PMO-EXTENSION SMALL JC72-00971A 1 X
4 PLATE-KNOCK_UP JC61-00603A 1 X
5 SPRING-KNOCK_UP 6107-001166 2 X
6 HOLDER-PAD JC61-00580A 1 X
7 SPRING-FRICTION PAD JC61-70911A 1 X
8 ROLLER-IDLE FEED JC66-00529A 2 X
9 SPRING-FEED 6107-001047 2 X
10 PMO-PLATE_LOCKER JC72-00972A 1 X
11 SPRING-LOCKER JG61-70531A 1 X
12 ADJUST-CASSETTE_L JC70-00300A 1 X
13 ADJUST-CASSETTE_R JC70-00301A 1 X
14 GEAR-PINION JG66-40003A 1 X
15 INDICATOR-LEVER INDICATOR JC64-00040A 1 X
16 RPR-FRICTION PAD JC73-00140A 1 X
17 IPR-PLATE PAD JC70-00314A 1 X
18 RPR-PAD CASSETTE JC73-00141A 3 X

< Cassette Unit Parts List >

SA. : Service Available

O: Service available X: Service not available

6

6

6-1

BLOCK DIAGRAM

Service Manual

6. Block Diagram

6.1 Phaser 3130

FUSER ASS’Y

POWER CORD

IN-LET

F.G

THERMISTOR

T o Controller

MAIN MOTOR

C-SOLENOID

C-SOLENOID-MP

SCF

(Option)

IEEE1284

Interface

USB2.0

Net2270

Crystal

14.74 MHz

Freq.

Spread

Video

Clock

VOLTAGE

DETECTOR

MOTOR

DRIVER

Power On

Reset

Controller Block

SMPS Block

HEATER-AC

+24V

+5V

+3.3V

GND

Crystal

12MHz

Freq.

Spread

EEPROM

FEED-SENSOR

P/EMPTY-SENSOR

MP-SENSOR

Main Clock

EXIT-SENSOR

THVPWM

BLASPWM

MHVPWM

+24V

Cover-open Switch

PANEL B’D

PTL

LSU

+

+

+

+

FAN

2 LED

1KEY

Font ROM

16MB

FLASH

MEMORY

(2MB)

SDRAM

(8MB)

SPGPm

ARM946ES

HVPS Block

MHV

OPC GND

SUPPLY

DEV

THV

6-2

BLOCK DIAGRAM

Service Manual

6.2 Phaser 3120

MHVPWM

THVPWM

F.G

EXIT-SENSOR

FEED-SENSOR

P/EMPTY-SENSOR

MP-SENSOR

IN-LET

-

+

GND

THV-RD

BIASPWM

THV_EA

HEATER-THERMIST OR

+24V

+5V

+3.3V

FAN

POWER

CORD

Crystal

12MHz

Main Clock

Power On Reset

SMPS + Main 26p

CPU Jupiter 4

+24V

Main Motor

C-CLUTCH

USB

HEATER-AC

SMPS PART's

COVER OPEN SW

CN8

CN8

CN11

CN6

CN1

CN3

CON4

CON1

CN2

CN9

HVPS PART'S

VOLTAGE

DETECTOR

PTL

LSU

PANEL B’D

2 LED

1KEY

MHV

OPC GND

SUPPL Y

DEV

THV

FUSER ASS’Y

M-CLUTCH

MOTOR DR

PART'S

FLASH

MEMORY

0.5MB
(128Kx32bits)

ARM7

90MHz

Video

Clock

LD

SSCG

7

7

7-1

CONNECTION DIAGRAM

Service Manual

7. Connection Diagram

7.1 Phaser 3130

HOST

COMPUTER

IEEE1284

COMOPATIABLE

CABLE

CN5

PCL MAIN BOARD

FR-4, 4LA YER

6 PIN

CONNECTOR

for USB

USB CABLE

CN14

1
2

1
2

THERMISTOR

1
2

3
4

MOTOR

CN8

CN10

CN3

DCU

+3.3V
DCU_DATA

1
2
3

4

1
2

3
4

DCU_CLK
GN D

1
2

3
4
5

6
7
8

9
10
11

1
2
3

4
5

1
2

3
4
5

6

LSU

POL YGON
MOTOR

LD

DIODE

1
2

1

2

CN13

CN6

CN12

CN1 1

CN9

SMPS

HVPS

CN5

1
2

1

2

1
2

Main Clutch

PTL LED ARRAY

Manual Clutch

1
2

P ANEL

FAN

A
B

THER 1
THER 2

A/
B/

38 PIN

37
38

5
6

1
2
3

4

1
2

3
4

5
6
7

8
9

10

11

12
13

14
15
16

17
18
19

20
21
22

23
24
25

26

2
1
4

3
6
5

8
7

10

9
12
11

14
13
16

15
18
17

20
19
22

21
24
23

26
25

1
2
3

4

LSUCLK
nLREADY
nPMOTOR
GND

24VS
*HSYNC
5V
GND
nLD_ON

VDO
GND

+3.3V
PTL

+24V
MP_CLUTCH

+24V
MAIN_CLUTCH

P_EMPTY
P_FEED

3.3V

3.3V

3.3V GND

3.3V GND
5V

3.3V GND

3.3V GND

3.3V GND
24VS
24VS
MP_EMPTY
24VS
LED_READY
THV_READ
LED_ERROR
THV_PWM
THV_EN

BIAS_PWM
MHV_PWM

LED_TONER SAVE
KEY_DEMO
FAN
FUSER

P_EXIT

7-2

CONNECTION DIAGRAM

Service Manual

7.2 Phaser 3120

THE RM
THE RM2

1
2

1
2

THERMISTOR

MOTOR

DCU

HOST

COMPUTER

A

A/

1
2

3
4

1
2
3

4

B
B/

CN2

CN7

CN5

CN3

4PIN

CONN-ECTOR

for

USB

USB CABLE

+3.3V
DCU_DATA

1
2

3
4

1
2
3

4

DCU_CLK
GND

SPL

MAIN

BOARD

FR-4, 2Layer

1
2

3
4
5

6

LSU

POL YGON
MOTOR

LD

DIODE

1
2

1
2

CN10

CN3

CN9

CN8

CN6

SMPS

HVPS

1
2

3
4

5
6
7

8
9

10
11

12
13

14
15
16

17
18
19

20
21
22

23
24
25

26

CN5

1
2

1
2

1
2

Main Clutch

PTL LED ARRAY

Manual Clutch

1
2

PANEL

FAN

2

1

4

3

6

5

8

7
10

9
12
11

14
13
16

15
18
17

20
19
22

21
24
23

26
25

LSUCLK
nLREADY
nPMOTOR
GND

24VS
*HSYNC
5V
GND

nLD_ON
VDO
GND

+3.3V
PTL

+24V
MP_CLUTCH

+24V
MAIN_CLUTCH

P_EMPTY
P_FEED

3.3V

3.3V

3.3V GND

3.3V GND
5V

3.3V GND

3.3V GND

3.3V GND
24VS
24VS

MP_EMPTY
24VS
LED_READY

THV_READ
LED_ERROR
THV_PWM
THV_EN

BIAS_PWM
MHV_PWM

LED_TONER SA VE
KEY_DEMO
FAN

FUSER
P_EXIT

1
2
3

4
5

1
2

3
4
5

6
7
8

9
10
11

8-1

SCHEMATIC DIAGRAMS

Service Manual

8

8. Schematic Diagrams

8.1 Phaser 3130 Main Circuit Diagram (1/9)

8-2

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3130 Main Circuit Diagram (2/9)

8-3

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3130 Main Circuit Diagram (3/9)

8-4

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3130 Main Circuit Diagram (4/9)

8-5

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3130 Main Circuit Diagram (5/9)

8-6

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3130 Main Circuit Diagram (6/9)

8-7

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3130 Main Circuit Diagram (7/9)

8-8

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3130 Main Circuit Diagram (8/9)

8-9

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3130 Main Circuit Diagram (9/9)

8-10

SCHEMATIC DIAGRAMS

Service Manual

8.2 Phaser 3120 Main Circuit Diagram (1/5)

8-11

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3120 Main Circuit Diagram (2/5)

8-12

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3120 Main Circuit Diagram (3/5)

8-13

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3120 Main Circuit Diagram (4/5)

8-14

SCHEMATIC DIAGRAMS

Service Manual

Phaser 3120 Main Circuit Diagram (5/5)

8-15

SCHEMATIC DIAGRAMS

Service Manual

8.3 HVPS Circuit Diagram (1/2)

R305

MGR1/2W 50M

5V

Q201

A708-Y

4

R204

47K

D202

D1NL20U

TNR201

5N221K

THV-PWM

¡

C210

6KV 221

R205

22K

IT301

Q302

C2383

6

IT201

IT-01

C303

103

7

THV-EA

¡

D206

6KV

R304

1/4W 4.7

ZD301

2.7V

C304

3KV 151

1

¡

D205

6KV

R212

1/2W 100K

5

Q301

C945C-Y

¡

C206

104

R209

100K

D302

4KV

C204

103

R306

150KF

2

D303

1N4148

R206

180K-F

CON2-17

7

R207

330K-F

THV

THV

50K

R307

150K

THV-sen

R213

MGR1/2W 100MF

4

THV-READ

CON2-18

6

C302

103

IT-01

1

D301

D1NL20U

R303

470

Q202

C945C-Y

C201

473

5V

INDEX

50K

C307

473

¡

C202

102

D305

1N4148

24VS

5V

C212

2KV 221

D201

1N4148

C306

473

TNR203

5N431K

ZD201

2.7V

THV-sen

R208

10K

R201

430

TNR202

5N431K

R211

1/4W 4.7

R210

5.6K

R302

470K

5

C205

473

+

-

U102-A

KA324

3
2

1

+

-

U102-B

KA324

5
6

7

4

11

C305

104

C208

681

2

R202

100

C211

6KV 221

D203

D1NL20U

D204

6KV

D304

1N4148

CON2-16

C203

681

R301
1K

C207

103

24VS

C301

104

R309

N.U

R308

1K

R203

2K

¡

5V

C209

6KV 221

Q203

C2383

8-16

SCHEMATIC DIAGRAMS

Service Manual

HVPS Circuit Diagram (2/2)

D503

D1NL20U

5V

R413

1/2W 100K

C407

103

C505

104

D402
1N4148

OPC

1

C402

102

R505

10K

+

C113

25V 47uF

MHV-PWM

¡

R410

1/2W 560K

BIAS-sen

R513

1/2W 50K

R407

100K

ZD401

2.7V

6

ZD402

2.7V

R501

47K

R408

470

¡

GND

ZD501

2.7V

C405

104

R404

10K

Q402

C945C-Y

7

D401

1N4148

D501

1N4148

SUPPLY

R512
30KF

¡

BIAS-sen

1

+

C112

50V 10uF

IT401

C504

472

R515

MGR1/2W 15MF

C502

102

5

C506

103

R510
1/2W 1.8M

OUT

5V

ZD503

200V

C501

473

R508

470

C503

681

R502

22K

Q403
C2316

+

-

U102-D

KA324

12
13

14

IN

R504

10K

CON2-20

R503

330KF

C508

103

R409
1/4W 4.7

Q501

A708-Y

ZD403

130V

2

D404

4KV

R401

47K

+

-

U102-C

KA324

10

9

8

4

24VS

5V

C510

3KV 101

R402

22K

R412
30KF

C406

103

MHV-sen

CON2-19

5

D502
1N4148

R405

10K

D504

4KV

Q401

A708-Y

C409

3KV 471

R406

5.6K

C404

472

Q503

C2316

2

5V

DEV
20K

MHV
20K

R511

MGR1/2W 10MF

C509

3KV 471

MHV-sen

DEV

Q502

C945C-Y

4

24VS

5V

KA7805

R506

5.6K

D403

D1NL20U

MHV

¡

IT-01

R411

MGR1/2W 20MF

U103

IT501

R514

1/2W 50K

ZD502

2.7V

R509

1/4W 10

¡

R507

100K

C410

221

C507

103

¡

6

24VS

C403

331

BIAS-PWM

7

C401

473

C408

103

IT-01

R414

MGR1/2W 15MF

R403

1.5M

8-17

SCHEMATIC DIAGRAMS

Service Manual

8.4 SMPS Circuit Diagram

C110

NU

3

C105

50V 33uF

D6

D1NL20U

CON2-22(LED-DATA)

C8

471

U101

TL431

2

3

1

R5

2W

100K

4

F101

CON2-16(THV-PWM)

9

DSS-401M

C7

50V

33uF

NO MARKING RESISTOR 1/8W-J(5%)

C6

1KV 103

CON2-25(FUSER-ON)

R106

1/2W 3.3K

C101

1KV 102

CON2-14,16(+24VS)

R108

22

5

EER2828

AR1

R107

1/2W 3.3K

CON2-23(KEY-DEMO)

R11

1W 47

FUSIBLE

F1

250V 5A

CON2-18(THV-READ)

Vin

CON2-26(EXIT)

R112

5.6K-F

INLET1

R7

6.8K

SW1

SW SPST

R6

30

CON2-24(FAN)

NU

CON2-25(*FUSER-ON)

GND

CON2-19(MHV-PWM)

GND

D103,104

40V 3A*2

C104

NU

CON2-20(BIAS-PWM)

CON2-13,14

D5

UF4007

R111

1.8K-F

1

CON1

1

2

R113

NU

Source

10

+24VS

F2

250V 2A

Drain

C103

35V

47uF

PT1

C106

1KV 102

11

R8

680

CON2-10,11,12

STR-G6353

R101

22

C10

630V

333

LF2

2003

CON2-7,8,9

OCP/FB

C2

222MAD

PWM CONTROL

DGND

R110

220

R2

1/4W75K

D101,102

200V 3A*2

U2

TH1

SCK-054

+3.3V1.0A

R9

1W0.6

R12

1W 180

FUSIBLE

R3

1/4W75K

DSS-401M

R105

1/2W 3.3K

C4

104

C3

222MAD

BD1

SW2

LF1

1007

CON2-1,2,3

C108

50V1uF

C12

332MAD

AR2

L1

300uH

+24V2.0A

2

C107

10V

1000uF

U1

BTA12-600B

8

C1

224

1

C11

50V

104

PC102

TLP3061S

L101

10uH

C9

NU

1

R1

1/2W

560K

R109

NU

C5

400V

100uF

R104

1/2W 3.3K

2

SS-5GL2

CON2-15(MANUAL)

6

R114

1/2W

1.5K

CON2-4,5,6

TNR1

10D561K

R102

1/2W 3.3K

3

PC101-B

817M-B

3

-+

D1,2,3,4

600V2A*4

C109

10V

470uF

CON2-21(LED-ERROR)

C102

35V

1000uF

R13

1/4W 22

4

PC101-A

817M-B

R4

1/4W75K

R103

1/2W 3.3K

CON2-17(THV-EA)

8-18

SCHEMATIC DIAGRAMS

Service Manual

8.5 OTHER PBA Circuit Diagrams

R115

150

R117

150

CON2-24(FAN)

1

2

R118

47K

2

OP102

ITR-8406S

CON4

3

C111

104

CON2-15(MANUAL)

35301-0350

35303-0550

5

CON2-23(KEY-DEMO)

R120

5.6K

4

CON2-26(EXIT)

R119

2.2K

3

3

24VS

2

2

1

4

CON2-21(LED-ERROR)

OP101

ITR-8406S

13

3.3V

D105

1N4003

1

R116

47K

CON3

3.3V

CON2-22(LED-DATA)

Q101

KSC1008-Y

4