Samsung SCX 5015 Troubleshootin

Troubleshooting

5. Troubleshooting

In this chapter, it was mentioned about the functions for maintaining the product, how to find the causes of the
inferiority, and troubleshooting method.

5-1 Preventative Maintenance

The cycle period outlined below is a general guideline for maintenance.
The example list is for an average usage of 50 transmitted and received documents per day.
Environmental conditions and actual use will vary these factors.
The cycle period given below is for reference only.

COMPONENT REPLACEMENT CYCLE

ADF Rubber 50,000 Pages

ADF Roller 50,000 Pages

Pick-up Roller 50,000 Pages

Transfer Roller 50,000 Pages

Fuser 50,000 Pages
Toner Cartridge 6,000 Pages
Drum Cartridge 15,000 Pages

5-2 Error Messages

ERROR MESSAGE DESCRIPTION SOLUTION

[BYPASS JAM] When the machine detected the non-feeding from

BYP ASS Tray .

COMM. ERROR A problem with the facsimile communications has

occurred.

DOCUMENT JAM Loaded document has Jammed in the feeder

When Document Jam aeeurred at ADF module

[DOOR OPEN ] The side cover is not securely latched. Clear the cover until it clicks in place.
DRUM WARNING When the machine has encountered the drum

life,14000 print pages.

[DUPLEX JAM]
OPEN/CLOSE DOOR

GROUP NOT AVAILABLE You have tried to select a group location where

HEATING ERROR During operation, Temperatare does not go up. Check thermister contact point & Heating

When the machine detected the duplex jam in the
middle of machine.

only a single location number can be used, such
as when adding locations for a multi-dial opera­tion.

Open the side Cover and clear the jam.

Try again.

Clear the document Jam.

Use little more change if “REPLACE
DRUM” is marked in LCD window.

Clear the jam.

Try again, check location for group.

Lamp.

LINE ERROR Your unit cannot connect with the remote

machine, or has lost contact because of a prob­lem on the phone line. When the mechine has a
problem in cause of fax data reception step

Try again. If failure persists, wait an
hour or so for the line to clear then try
again.

5-1

Troubleshooting

ERROR MESSAGE DESCRIPTION SOLUTION

INVALID
CARTRIDGE

You have used unauthorised cartridge. You must use a Samsung approved car-

tridge.

LINE BUSY The remote FAX didn’t answer Try again.

LOAD DOCUMENT You have attempted to set up a sending opera-

Load a document and try again.

tion with no document loaded.

MEMORY FULL The memory has become full. Either delete unnecessary documents, or

retransmit after more memory becomes
available, or split the transmission into
more than one operation.

NO ANSWER The remote machine was not answered after all

the redial attempts.

NO DEVELOPER
CARTRIDGE

When the machine detected the toner cartridge
has not been installed.

NO. NOT ASSIGNED The speed dial location you tried to use has no

number assigned to it.

[NO PAPER]
ADD PAPER

[PAPER JAM 0]
OPEN/CLOSE DOOR

The recording paper has run out. The printer sys­tem stops.

Recording paper has jammed in paper feeding
area.

Try again.
Make sure the remote machine is OK.

Install the Cartridge.

Dial the number manually with the key­pad, or assign the number.

Load the recording paper in the paper
feeder.

Press STOP and clear the jam.

Recording paper is jammed in pick-up unit

[PAPER JAM 1]
OPEN/CLOSE DOOR

[PAPER JAM 2]

Recording paper has jammed inside the unit.
Recording paper has jammed in paper exit unit.

Paper has jammed in the paper exit area.

Clear the jam.

CHECK INSIDE
[TONER EMPTY] When the machine has encountered the Toner

Replace the Toner Cartridge.

Empty.

[TONER LOW] The toner is almost empty. Take out the toner cartridge and gently

shake it. By doing this, you can tempo­rarily re-establish printing operations.

REPLACE DRUM When the machine has encountered the out of

Replace the Drum Cartridge.

from lifr, 15000 print pages.

RETRY REDIAL? The machine is waiting for the programmed inter-

val to automatically redial.

You can press START to immediately
redial, or STOP to cancel the redial
operation.

OPEN HEAT EROR Thermister does not connected to main board or

contact point is not coupled tightly in power on.

Check thermister contact point, Heating
Camp & Thermostat.

[OVERHEAT] The printer part has overheated. Your unit will automatically return to the

standby mode when it cools down to nor­mal operating temperature. If failure per­sists, call service.

SCANNER LOCKED Scanner is locked by locker. Check locker.

Connect the Flat-Cable.

5-2

Troubleshooting

5-3 T ech Mode

5-3-1 How to Enter Service Mode

In service mode (tech) mode, the technician can check the machine and perform various test to isolate the
cause of a malfunction.

To enter the Tech mode, press MENU, #, 1, 9, 3, 4 in sequence, and the LCD briefly displays ‘T’, the
machine has entered service (tech) mode.

While in Tech mode, the machine still performs all normal operations.
To return to normal user mode, press MENU, #, 1, 9, 3, 4 in sequence again, or turn the power off, then on

by unplugging and plugging the power cord.
Options changed while in service mode do not remain changed unless you clear the machine’s memory.

5-3-2 SYSTEM DATA

DIALING MODE

Select the dialing mode according to the user's line status.

• TONE: Electrical type of dial

• PULSE: Mechanical type of dial

SILENCE TIME

In ANS/FAX mode, after a call is picked up by the answering machine, the machine monitors the line. If a
period of silence is detected on the line at any time, the call will be treated as a fax message and the machine
begins receiving.
Silence detection time is selectable between limited (about 12 seconds) and unlimited time.
When '12 sec' is selected, the machine switches to receiving mode as soon as it detects a period of silence.
When 'unlimited'is selected, the machine waits until the answering operation is concluded even though a
period of silence is detected. After the answering operation is concluded, the machine switches to receiving
mode.

SEND FAX LEVEL

You can set the level of the transmission signal. Typically, the Tx level should be under -12 dBm.
Caution: The Send Fax Level is set at the best condition in the shipment from factory. Never change

settings arbitrarily.

ERROR RATE

When the error rate is about to be over the setting v alue, the Baud r ate automatically lo wers up to 2400 bps to
make the error rate remain below the setting value.
You can select the rate between 5% and 10%.

MODEM SPEED

You can set the maximum modem speed.
Communication is done with modem speed automatically set at lower speed when communicating with the
modem with lower speed since communication is done on the standard of the side where modem speed is low
for transmission/reception. It is better set 33.6Kbps as default setting.

5-3

Troubleshooting

5-3-3 MEMORY CLEAR

CLEAR ALL MEMORY

The function resets the system as its very first condition as setting in at the factory.
This function is needed to operate to reset the system to the initial value when the product is abnormally oper­ated or malfunction. All the values are returned to the default values, and all the information, which set in by
user, will be erased.

< Method >

1. Select the [MEMORY CLEAR] at the TECH MODE.

2. Push the ENTER button.

3. Select you country.

4. Push the ENTER button then it will be all memory clear. .

NOTICE : Always perform the memory clear after replace the main board. Otherwise, the system may

not operate properly.

5-3-4 MAINTENANCE

CLEAN DRUM

Use this feature to get rid of the toner remained in the development unit, so you can get a clean printout.
Perform this feature if stains or specks appear on the printing materials and print quality falls.
Perf orm this feature several times until a clean printing material appears. The machine automatically pulls in a
sheet of paper,and prints out.The toner particles on the OPC drum surface is fixed to the paper.

FLASH UPGRADE

It is Firmware Upgrade function and has two methods, Local and Remote.
More information can be found in the firmware upgrade items.

ADJUST SHADING

The function is to control to get the optimum scan quality by the specific character of the CCD(Charge Cou­pled Device). If the copy image quality is unsatisfied, perform the function to check the condition of the print
out for checking whether or not having CCD trouble.

< Method >

1. Select the [ADJUST SHADING] at the TECH MODE.

2. Push the SET UP button then an image will be scanned.

3. After the scan, CCD SHADING PROFILE will be print out.

4. If the printed image is different to the image, the CCD is defect.

NOTICE :

that the cover is closed.

When you test CCD, make sure

5-4

Troubleshooting

ANSWER ON CNG

The function is to control the CNG TONE cognition times for entering receiving mode from the AUTO MODE
or ANS/FAX MODE

CLEAR COUNT

This function erases information of history such as replacement times of Developing part and OPC drum,
total printing pages, scan times, and etc.

• The items are in the below section of the System Data List, printed at TECH MODE.

• PASSWOEED: 1934

• Current Drum Page Count cannot be erased.
It is possible to erase at NEW DRUM function (USER MODE ⇒ MINTENANCE ⇒ NEW DRUM)

FIRMWARE VERSION : 1.00
ENGINE VERSION : 1.00
EMULATION VERSION : PCL6 2.32 07-11-2001

TOTAL PAGE COUNTS : 123
CRU PRINTS : 123
REPLACED TONER COUNTS : 1
REPLACED DRUM COUNTS : 1
CURRENT DRUM COUNTS : 112
PLATEN SCAN PAGE COUNTS : 23
ADF SCAN PAGE COUNTS : 10

PCL5e 1.48 07-19-2001

< SYSTEM DATA LIST >

P A TTERN TEST

Using this pattern printout, you can check if the printer mechanism is functioning properly.
It is needed in the production progress. Service person doesn't need to use it.

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

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 >>

SRAM TEST

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

MODEM TEST

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

5-5

Troubleshooting

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.

NOTIFY T ONER LOW

With this feature enabled, when the toner becomes low, the toner low information will be sent to ta specified
contact point, for example, the service company. After you access this menu, select ON, and when the LCD
prompts, enter the name and the number of the contact point, the customer's fax number, the model name,
and the serial number.

PROGRAM DIAL

It is a function setting transmitting conditions to transmit to specific address preliminary.
When user transmit specific address set this function, the conditionsapplied automatically.

5-6

Troubleshooting

5-3-5 REPORT/HELP

MSG. CONFIRM

It shows the result of the last send operation.

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 a communication error occurs while the
machine is in TECH mode, the protocol list will print automatically.

Facsimile Information Field
data described in hexdecmal code

Sending/Receiving

PROTOCOL DUMP LIST NOV-20-2001

S/R FCF FIF DATA! ASCII

S NSF 61005820003380140200001302090018010000
S CSI 2020202020202020202020202O20202020202020
S DIS 00000000 01110111 00010111 00100010
S NSF 61005020003380140200001302090018010000
S CSI 202020202020202020202022O202020220202020
S DIS 00000000 01110111 00010111 00100010

R TSI 2020202020202020202020202O20202020202020
R DCS 00000000 01100001 00010101 00000000
S FTT
R TSI 2020202020202020202020202O20202020202020
R DCS 00000000 01100001 00010101 00000000
S CFR
R MPS
S MCF
S DCN

Name of signal
(Facsimile Control Field)

FIF data described
in ASCII code

HELP

It shows a brief description on the machine's basic functions and commands.Use it as a quick reference guide

RECEPTION

This journal shows a specific information concerning reception activities, the time and dates of up to 40 of the
most recent receptions.

TRANSMISSION

This journal shows a specific information concerning transmission activities, the time and dates of up to 40 of
the most recent transmissions.

SYSTEM DATA

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

PHONEBOOK

It lists all telephone numbers that have been stored in the machine.

SCHEDULE JOB

This list shows a specific information on the documents currently stored for delayed transmission. It provides
the operation number, starting time, type of operation, etc.

ERROR CODE

It shows error history occurred using product.

5-7

Troubleshooting

5-3-6 Firmware Upgrade

It is a new Firmware, and there are two Upgrade methods by local and remote.

5-3-6-1 Local Machine

RCP(Remote Control Panel) mode

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

< Method >

How to Update Firmware using RCP

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

2. Ex ecute RCP and select Firmware Update. Current Firmware version and Emulation Version are displayed
on Current version window.

3. Search Firmware file to update with Browse Icon.

4. Click Update icon, firmware file is transmitted to Printer automatically and printer is initialized when it fin­ished.

5. Click Refresh icon and check what is updated.

DOS Command mode

This method is just for Parallel Port. Connect to PC with Parallel cable and enter DOS Command to upgrade
the Firmware.

< Method >

a). The first of all, need the files : down.bat, down_com.bin, fprt.exe, and Rom File : file name for upgrade.Save the files in the
same folder.
b). In the DOS, input as below and push the enter key. Then, it will be automatically upgraded.
c) There are two commands for the conditions of product.
* When the product is in idle condition

down "rom file"

* When the product is in idle condition(TECH MODE → MAINTENANCE → FLASH UPGRADE → LOCAL)

fprt "rom file"

d) Do not turn off the power while upgrading process.

Remote FAX

This is a function that a fax with the latest firmware sends files to a fax in long distance through telephone line.

< Method >

1. Operate a fax with the latest firmware to prepare it being upgrade.

(TECH MODE MAINTENANCE FLASH UPGRADE REMOTE)

2. Input the fax number, which needs to be upgraded.

(Several faxes can be upgrade at the same time. In this case, enter the each fax number.)

3. After push the enter button, send the firmware file by calling to the appointed number.

(Around 10~15 minutes needs to send the file.)

< Caution >

1. sending and receiving fax must be the same model.

2. A sending fax must be set up as ECM mode, and a receiving memory must be set up as 100%.

If not, the function operates abnormally.

5-8

Troubleshooting

5-4 ENGINE TEST MODE

The Engine Tests Mode supplies useful functions to check conducting condition of engine. It tests the con­ducting condition of each device and displays the result of the test at the LCD. It is classified in 6. items (0~5),
and the functions of items are as bellows.

5-4-1 To enter the Engine Test Mode

Press MENU, #, 1, 9, 3, 1 in sequence, and the LCD briefly displays ‘T’, the machine has entered service
(tech) mode.

5-4-2 Diagnostic

No. Sub No. Engine tes t

0 1 Motor Test 1: On, 2: Off

2 PTL Test 1: On, 2: Off
3 Fan Test 1: On, 2: Off

: On, 2: Off

4 Fuser Test

1 1 LSU Motor Test 1: On, 2: Off

2 LSU Hsync Test 1: On, 2: Off
3 LD On Test 1: On, 2: Off
4 LSU Operation 1: On, 2: Off

2 1 Feed Sensor Test Sensor O n : FEED SENSOR ON D isplay

2 Exit Sensor Test Sensor On : EXIT SENSOR ON Display

3 Cov er Sensor Test Se nsor On : COVER SENSOR ON Display

4 1’st CAST Emp ty Test Sensor O n : 1’st PAPER Em pty Displa y

5 MP Empty Sen Test Sensor O n : MP PAPER Em pty Display

6 BIN FULL Sen TEST Sensor On : BIN F ULL SEN ON D isplay

3 1 1’st C AST Solenoid Test 1: On, 2: Off

2 MP Solenoi d Test 1: On, 2: Off
3 Duplex Solenoid Test 1: On, 2: Off

4 1 MHV Test 1: On, 2: Off ( -1450v)

2 Dev Bias Test 1: On, 2: Off ( -450v)
3 THV EN/NEG Test 1: On, 2: Off
4 THV Test 1: On, 2: Off ( 1300v)
5 THV Trigger T est 1: On, 2: Off

5 1 All Function Test

1

If its temperature is lower than the Standby
(160 C), the fuser is on, but if it is higher than
the Standby, the fuser is off.

Sensor O ff : FEED SENSOR OFF Display

Sensor Off : EXIT SENSOR OF F D isplay

Sensor O ff : COVER SENSOR OFF Display

Sensor O ff : 1’st PAPER N o Empty D isplay

Sensor O ff : MP PAPER No E mp ty Display

Sensor O ff : BIN FULL SEN OFF D isplay

For SMD Test, Push up key : Next function
All Function : N o.0~4

Remark

5-4-3 ENGINE PRINT

When the function is on, sentence to explain the condition of engine is printed in the below section of the print­ing output.
It is needed in the development progress. Service person doesn't need to use it.

5-9

Troubleshooting

5-5 Troubleshooting

5-5-1 Scanner

5-5-1-1 COPY

PROBLEM ITEMS TO BE CHECKED. HO W TO SOLVE

White copy • Check the Scan-Cover open. • Room light can transit a thin original.

• Check shading profile. • Remake shading profile in the tech mode.

• Check white/black reference voltage in

Main PBA.

• Check turning the CCD Lamp on when
operating.

Black copy • Check the CCD problem in Main PBA. • Check the CCD harness contact.

• Check shading profile. • Remake shading profile in the tech mode.

• Check the CCD problem in Main PBA. • If the CCD is defective, replace it.

Defective image quality • Check shading profile. • Remake shading profile in the tech mode.

• Check the gap between original and scan-

ner glass.

• Check printing quality. • See “Print” troubleshooting.

Abnormal noise • Check the Scanner Motor and any

mechanical disturbance.

• Replace U16 if it is defective.

- U16-97 = 2.5V - U16-98 = 3.3V

- U16-99 = 1.5V

• If the CCD is defective, replace it.

- CN3-19 is 5.8V when white original copy­ing for R, B and 3.5V for G.

- Cn3-19 is 7.3V when idle for R, B, and 5V
for G.

• The gap above 0.5mm can cause a
blurred image.

• Check the right position of the Scanner

Motor, and check the any mechanical dis­turbance in the CCD carriaging part.

5-10

• Check the Motor Driver in Driver PBA. • If any driver is defective, replace it.

- U55-1 or U55-15 = 0V to 24V swing signal
when operating.

Troubleshooting

5-5-1-2 PC-Scan

PROBLEM ITEMS TO BE CHECKED. HO W TO SOLVE

Scanning Error • Check the printer cable installed. • Check correct installation, and use stan-

dard IEEE1284 cable.

• Check how TWAIN driver is installed. • Remove any other scanner driver.

• Reboot after reinstallation of the TWAIN

driver.

• Check the printer port(Parallel). • Check the parallel-port-related items in the
CMOS Setup.
As a printer port, Select ECP among
SPP(Normal), ECP, and EPP
modes(increase print-ing speed)

• Check harness contact.

.

• Check the IEEE1284 signal level. • If any signal level is defective, replace

• Check the USB signal level. • If USB signal level is defective, replace

Defective image
Quality

Abnormal noise • Check the Scanner Motor and any

• Check shading profile. • Remake shading profile in the tech mode.

• Check the gap between original and scan-

ner glass.

mechanical disturbance.

• Check the motor driver in Driver PBA. • If any driver is defective, replace it.

• Check CN14 contact in Main PBA

Driver PBA.

- U36-66~74 in Main PBA = 0.8V to 2.4V

TTL signal.

• Otherwise, replace Main PBA.

Main PBA.

• The gap above 0.5mm can cause a

blurred image.

• Check the right position of the Scanner

Motor, and check the any mechanical dis­turbance in the CCD carriaging part.

- U55 or U56-1 = 0V to 24V swing signal

when operating.

5-11

Troubleshooting

5-5-2 FAX

5-5-2-1 FAX/TELEPHONE Precautions

PROBLEM ITEMS TO BE CHECKED. HO W TO SOLVE

TEL LINE CANNOT BE
ENGAGED
(NO DIAL TONE)

• When you press “ OHD” key:

a) Check line cord connection.
b) Check MAIN LIU harness, and CN1
(LIU PBA).
c )Check relay operation of LIU PBA :
Is the control signal of CN20-7(main) low?

a) insert it correctly into the connection

jack called “line”.
b) Replace defective parts.
c) Replace main PBA IF the control signal

of CN20-7(main) is high.
Replace LIU PBA if high but phone line

cannot be connected.

Cannot MF dial • Check CN20 (main PBA), MAIN-LIU

harness, and CN1 (LIU PBA)

MF dial is possible but
not DP dial.

Defective fax transmis­sion

Defective automatic f ax
reception

• Check DP control signal of CN20-11 of
MAIN PBA and the circuit around R15. U6
and Q2 of Liu PBA.

• Check CN20 (main PBA), MAIN LIU
harness, and CN1(LIU PBA).

• Is the external phone hooked off?

• Check ‘hook off’ : Refer to ‘TEL LINE
CANNOT BE ENGAGED’ above.

• Check the control signals of CN20-11.

• Check transmission path : Check output of

CN20-3.4 and T2-4(LIU PBA).

• Check reception path : Check output CN1­ 1 (LIU PBA) and input of CN20-1
(main PBA).

• Is the ring checked?
Check ring pattern at CN1-9 (LIU PBA).

• Refer to ‘Defective Transmission. ’

• Replace defective parts.

• Replace LIU PBA.

• Replace defective parts.

• Replace LIU PBA if low.

• Refer to ‘TEL LINE CANNOT BE

ENGAGED’ above.

• Replace main PBA, if the signals of CN8-

11 (MAIN PBA) is low.

• Replace main PBA, if abnormal.

• Replace LIU PBA if CN1-1(LIU PBA) is not

confirmed.
Replace main PBA if CN20-1(MAIN PBA)

is not confirmed.

• Replace LIU PBA if it cannot be checked.

• Refer to ‘Defective Transmission’.

5-12

5-5-3 Print Quality

Error Status Check Solution

Vertical blac k line and
band

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

1. Bad blade of Toner cartridge

2. LSU

1. Change Toner cartridge

2. Replace LSU

Troubleshooting

Vertical white line

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

No image

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Light image

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

1. LSU window contamination

2. Toner cartridge

1. Seal tape is removed?

2. GND OPC is well grounded?

3. LSU running well?

4. Biss voltage is normal?

5. Lower toner?

6. Is there video data from Main PBA

1. Check seal tape removing

2. LSU light power normal?

3. Enough toner?

4. High charger voltage?

5. Lower bias voltage

6. Contamination of high voltage contact.

7. Transfer volatge and roller.

1. Clean LSU window

2. If not LSU, change Toner cartridge.

1. Removing seal tipe

2. Measure the resistance between frame

ground and the ground spring attached

frame. Confirm stable ground. Unless bad

ground, detach cabinet, check where is

bad point

3.Adjust LSU or replace it

4. Normal Dev bias = -350V

5. Shake toner cartridge and print.If a liitke

good, toner is empty

6. Test engine test pattern , replace Main

PBA

1. Check and remove tape

2. LSU light power check is difficult.
Compare with new one and check.

3. Check toner and developer counter
4~5. Measure all high voltage output.

6. Leakage toner cause bad contact and
increase contact resistance. Clean contami­nated area.

Dark image

Digital Printer
Digital Printer

1. LSU light power normal?

2. Bias voltage output is high?

3. Video data is always supplied?

1. Check the rated level and replace.

2. Set to power rating.

3. Replace defected board.

5-13

Troubleshooting

Error Status Check Solution

Background

1. High voltage output is normal?

2. C/R of Toner cartridge is contaminated?

1. Adjust to the rated status.

2. Replace Toner cartridge.

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Ghost

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Stains on back of
paper

Poor Fusing 1. Use recommended paper?

1. High voltage output.

2. Pre-Transfer Lamp.

3. Bad high voltage contact.

1. Contamination of transfer roller.

2. Stains of paper path.

3. Pressure roller’s contamination.

2. Check fusing temperature.

3. The machine was under the low tempera
ture for a long time?

1. Check every high voltage.

2. Check the turn-on PTL, LED crash.

3. Clean the inside machine or replace toner

cartridge.

1. Clean the transfer roller with vaccum

cleaner.

2. Clean the area of paper path with cloth or

air cleaner.

3. Remove fuser and replace it.

1. Should use recommended paper.

2. Check engine controller board.
If you have not thermometer, measure

the thermistor voltage to CPU, If 2.3V±5%

in printing CPU works well. Then, disas-

semble fuser and check the thermistor

contact and thermistor.

3. Re-check after putting the machine in the

warm place for certain period.

Partial blank image
(not periodic)

5-14

1. Toner is low?

2. The toner cartridge is out of position?

1. Replace Toner cartridge.

2. Checkand adjust.

Error Status Check Solution

Partial blank image
(periodic)

1. Develope roller scar or particle.

2. Scar or particle. (94 mm)

3. Transfer roller scar or particle .
(47 mm)

1~2. Replace toner cartridge.

3. Replace transfer roller.

Troubleshooting

Different image den­sity
(left and right)

Horizonral band 1. Unstable high voltage contact

Digital Printer
Digital Printer

1. Charge roller’s pressure force unbalance

2. Dev. roller and OPC or Dev. roller and
blade’s pressure force unbalance

3. Transfer roller’s pressure force unbalance
of each side

2. Charge roller’s contamination

3. Contamination of heat roller

4. Malfunction of LSU

Digital Printer
Digital Printer
Digital Printer

1~2. Change toner cartridge

3. Chec k left and right spring of transf er roller
and the spring pressing the developer
inside the machine

1. Clean each contact and check good con-

tact

2. Clean charge roller

3. Replace fuser unit

4. Check Main PBA.

Abnormal Image Printing and Defective Roller

If abnormal image prints periodically, check the parts shown below

NO Roller Abnormal image period Kind of abnormal image

1 OPC Drum 94.3 mm White spot. Black spot
2 Charge Roller 37.7 mm White spot. Black spot
3 Supply Roller 35.8 mm Horizontal dark band
4 Develope Roller 44.8 mm Horizontal dark band
5 Transfer Roller 57.8 mm Black side contamination/transfer fault
6 Heat Roller 82.5 mm Black spot, White spot
7 Pressure Roller 78.5 mm Black side contamination

5-15

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Troubleshooting

No Image

No image?

YES

Self test

pattern prints?

YES

Check connection to
computer or replace
controller

NO

NO

Self testing
is possible ?

YES

Take out the cartridge
and prepare the tester
for electronic connection

Is the OPC

terminal of machine

is well-connected

to Frame?

YES

NO

NO

A on

next page

Retest after replacing the
connector or controller board

Repair or replace the GND
terminal

Does the

video data line to

LSU transit to High/Low

when printing?

YES

The mirror in LSU might be
misplaced so the light path to the
OPC deviates ->Repair or replace
LSU or remove any defective
matters in the machine

NO

Check the path between
Main board
and HVPS. Repair or replace
the defective component
or board

5-16

Transfer roller might be out of its location

-> Locate the roller into its place
This could occurs when he power of LSU is low or

the density is low due to the obstacles on the window

-> Replace LSU or clean the window

A

Transfer

voltage OK? (on the

transfer roller

shaft)

Are the

connection terminal

and connection

correct?

Repair or replace terminal

Replace HVPS or repair defective component

Is the connection

terminal OK?

Replace HVPS or repair
defective component

Repair or replace terminal

Developing

(-300V) and supplying

(-450V) voltage

are OK?

Does the

counter indicate over

the toner's guaranty

life

Replace the toner cartridge

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

Troubleshooting

5-17

Troubleshooting

All Black

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

All black in

printing area?

YES

Is charge

voltage supplied

from HVPS?

YES

Is the

Hsync/ signal received

in LSU?

NO

NO

NO

Does the

video data line to LSU

transit to High/Low when

printing?

YES

Replace LSU

Repair or replace HVPS

Replace LSU

NO

Check the path among video
controller, engine board,
HVPS, LSU for the shortage
or open -> Repair or replace
the boards

Charge part's contact
is bad -> Repair or
replace toner cartridge

YES

5-18

Troubleshooting

Vertical White Line (Band)

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

White line

missing definitely?

YES

Dirt of dust stuck onto the
window of internal lens of LSU

-> Clean it or replace LSU
Preventive obstacles through

the path between OPC of
developer and LSU prevent the
path -> Remove the obstacles

NO

Check if the

printout is still has the

same problem even right after

passed through the

transfer roller

YES

Toner material might be stuck to
blade in the developer inside and it
prevents toner supply -> Replace
the developer

Check both if the toner cartridge's
counter is over its guaranty and
amount of the toner material

-> Replace the toner cartridge

NO

The ribs in fuser or toner on the
roller may invoke the image
problem -> Replace the fuser
cover or the defective part

The image is originally black or the
black part is far close to the top

-> Use the pattern which has the
image below bigger than 10mm
from the top

5-19

Dark Image

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Troubleshooting

NO

Dark selected

via RCP?

YES

Change to

Normal and test

Same at Normal?

YES

Works cor

with -300V of Bias

voltage?

YES

NO

NO

END

Repair or replace the defective
component

Works
correctly after
replaced LSU?

YES

The power of LSU is set
high or internal problem

-> Replace LSU or adjust
volume

NO

Toner over supply due to the
adjustment fault of metering
blade in developer

-> Replace developer

5-20

Troubleshooting

Background

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

- Adjust voltage or
replace HVPS

- Repair or replace
after
checking the
terminals' contacts

Recommended

paper used?

YES

NO

Solve the problem under
the recommended condition
(10-32 degree Centigrade)

Transfer,

charge and developing

voltage are OK?

YES

Operating/

storage atmosphere is

too high temperature

/humidity?

YES

NO

NO NO

Print 20 to 30 pages using
the recommended paper

YES

Same problem

occurs?

Dirt or

dust around the

charge roller?

YES

Clean the charge roller
or replace step-up device
/terminal after check

NO

END

Replace the
toner cartridge

5-21

Check Terminals or contacts and 'Guide-Deve Spring'
are misplaced

-> Repair or replace transfer roller etc.
Check if the LED of PTL in front of the transfer roller

is on when it presses the top cover switch on purpose

-> If not, replace PTL

NO

Work OK?

Internal blade or
supplying part of the
developer is defective

-> Replace the toner
cartridge

YES

Ghost

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Troubleshooting

Replace PTL
assembly

Check HVPS
contacts and
HVPS's self­output

-> If failed,
repair/replace
HVPS

interval of 95mm?

NO

NO

voltage is set to

Is it regular

YES

PTL lamp

works OK?

YES

Transfer

standard?

YES

NO

Is it regular

interval of 45mm?

YES

Developing

/supplying voltage

normal? (-300V/

-500V)
YES

Irregularity of NIP
between rollers in
developer

-> Replace developer

NO

A specific part of the transfer
roller has ruined or its
resistance value is changed

-> Replace transfer roller
Transfer roller cannot force

regularly due to the gears
eccentricity of transfer roller

-> Replace the defective
component

NO

Is it regular
interval of 58mm?
(as transfer roller

interval)

- Repair or replace HVPS

- Check and Repair or
replace the terminal
contacts

YES

Bias voltage

is OK? (-300V)

YES

Operating/storage

temperature is too low or

not recommended

paper used?

YES

Use the machine with
recommended paper and
at condition

NO

NO

Adjust the Bias
voltage or replace
HVPS

There may be a problem in toner
layer control in toner cartridge

-> Replace the developer

5-22

Troubleshooting

Black Spot

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Is it regular

interval of 38mm?

YES

The problem occured
since the obstacles
stuck to charge roller

-> Clean the Charge Roller
and then reprint.

NO NO NO

When taking

out the cartridge,

toner leaks?

YES

Toner leaks and much
toner material dropped
onto the paper ->
Replace the developer

Bad image

removes by

scratching?

YES

Check toner is stuck onto
the P/R or H/R in fuser

-> Clean it or replace

The problem
randomly occurred
due to the toner
fallen -> Clean the
machine

5-23

Horizontal Band

Troubleshooting

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Black band?

The black

band has regular

Digital Printer
Digital Printer
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Digital Printer

YES

interval?

YES

NO

NO

Black band

is far about 95mm from

white band?

Problem of internal
contacts in OPC

-> Replace developer

This occurs when no
Hsync/ at LSU

-> Replace LSU

NO

The OPC is damaged under the
direct sunlight for around 5
minutes -> If the same problem
persists in 10 hours, replace
the developer

94mm interval?

YES

The OPC is damaged due to
the irregular transfer voltage
of HVPS

-> Repair/replace HVPS

-> If the same problem persists,
replace the developer

NO NO

Does it appear

at every 83mm at

specific place?

YES

Heat roller is ruined

-> Replace the roller

Problems of terminal contact,
transfer voltage supplying,
and transfer roller's due to the
charge roller is ruined (38mm)

-> Repair/replace HVPS,
developer

5-24

Troubleshooting

Irregular Density

OK after

taking out and

rocking the toner

cartridge?

YES

It is over the guaranty
life of toner cartridge
(Check the counter
and replace it)

NO

When gray

pattern printing,

irregular density

persists?

YES

PTL lamp

works OK?

YES

Any obstacles

on the PTL lamp?

NO NO

NO

NO

transfer/

charge/developing

voltage drops while

printing?

YES

Check high voltage
output and repair/
replace terminals, HVPS

Replace lamp

Bad images

around the no image

area?

NO

Defective agitator in
the toner supplying part
of developer

->Replace the developer
Check if the 'guide deve

spring' works OK and
repair/repalce

Irregularity of toner
supply from developer

-> Replace developer

5-25

YES

Clean the window of PTL

YES

Light distortion due to
the mirror ruined or
LSU's diffused reflection

-> Replace LSU

White Spot

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

Troubleshooting

Is it regular

interval of 95mm?

YES

Obstacles stuck on OPC's
surface

-> Clean the OPC and
machine or replace
developer

When putting in/out the
developer, scratch is made

-> Replace the developer

NO

Transfer

voltage is normal?

YES

D/R in developing unit has
the defect

-> Replace the developer

NO

Too high voltage supplied
due to the setting error of
transfer voltage

-> Adjust/replace HVPS

5-26

Troubleshooting

Trembling at the End When OHP Printing

Recommended
OHP film used?

YES

Inserted over

than 10 films into

the MPF?

YES

When multi-page OHP printng,
less than 10 films are
guranteed. (Reduce the
number of films and re-insert
after paper check LED if off)

NO

NO NO

Use the recommended film

When OHP

printing, does the fan

temporarily stops

and revolves?

YES

Other parts are touching the
fan and prevents it from
revolution

-> Check and repair

Use the recommended film

5-27

Poor Fusing Grade

Troubleshooting

After printing

completed, any error

related fuser?

YES

Both ends

of thermostat

open?

YES

Replace thermostat
and re-test

NO

NO

The machine

placed under the

severe low tempera

ture for a long

time?

YES

Place the machine
at normal
temperature and
re-test

NO

While printing,

the voltage of pin 60

of U36 (CPU) on Main

PBA is 2.1V

- 2.6V?

YES

Open the top

cover. When black

printing, is the fuser NIP

width is 3.0-

3.5mm?

YES

NO

Thermistor's

contact is OK?

YES

Check if the hardness of

NO

P/R, and spring force is OK?
(hardness: 24 degree,
spring's force: 3 Kg)

NO

Re-assemble

thermistor

Replace the control
component on Main
PBA

Check any contact
problem in thermistor
and repair

The paper used is too
thick or contains too
much cotton in it

-> Re-test with the
recommended paper

5-28

Troubleshooting

5-5-4 Malfunction

Error Status Check Solution

No power 1. Check power is supplying

2. Check fuse F1 open

Fuser Error 1. Thermostat open

2. AC wire open

3. Thermistor wire open

4. Main PBA

Cover open 1. When close Side cover, check the lever is

pressed

2. Micro switch’s contact

3. CPU and related circuit

Jam 0 Check where Jam 0 happens

1. Paper is not picked up

2. Paper is located in feed sensor

3. Happened when inserting specific papers such
as envelope into the MPF (Multipurpose Paper
Feeder)?

4. Happened when inserting specific papers such
as envelope into the Manual Feeder?

5. Is the Stacker Extender is folded out?

6. Does not the Guide Adjust distort the papers

1. If supplying power differs from machine’s power rat­ing, replace the machine.

2. Replace it.

1. Detach AC connector and measure the resistane
between pin 1 and 2. If it is megohm, thermostat is
open, Replace it.

2. Check bad connector contact or wire is cut.

3. Check thermistor wire and its connection.

4. Replace Main PBA

1. Open Side cover and press the lever with pen. If
Controller detects cover close, there is some mechan­ical trouble in Side cover and lever’s assembly. If not
so there is electrical problem.

1. Check whether solenoid is working or not by using
Engine test mode

2. Check feed sensor malfunction.

3. Re-try inserting a fewer papers.

•fan the papers and align

•take out the loaded papers and insert
them reverse direction

4. Take out the loaded papers and insert them reverse
direction

•inserted papers as recommended for

Manual Feeding?

•When loading, tap the papers until paper detect
sensor senses loading

5. When using long papers, use the Stacker Extender

6. Adjust Guide to fit the paper width

Jam 1 Paper is stopped in just after of fuser unit. 1. It is mostly resulted from double feeding. Check

paper is well stocked in feeder.

2. Check feed actuator position and actuator’s operat­ing. There may be stiff movind or double reflection. If
not so, check the operation of feed sensor by Engine
test mode.

3. Check exit lever operation. Remore jam and check
actuator moving by hand. If actuator is too stiff, paper
is wrapped around the heat roller. Remove obstacles
or replace.

Jam 2 Check where Jam 2 happens

1. Paper is curled and cannot exit.

2. Paper is curled in the exit cover?.

1. Remov e paper using pinset or some tool and watch if
separate claws have any troble. Clean around fuser.

2. Chec k locking w orks wells. Watch whether the ribs of
exit cover hace any burr or resisitive edge. If they do,
remove obstacles or replace.

5-29

Error Status Check Solution

Troubleshooting

Jam 2 at

face-down

tray

Clutch error

High volt-

age error

Feeding

obstacles

1. Then paper is not drawn in because of the
stack of papers in the Out tray.

2. Does it curl while coming out?

1. Check the spring of solenoid

2. Check the armature assembly/cushion

3. Electrical check

1. Check the terminal output voltage

2. Check HVPS

Does the Plate-knockup prevent the paper
loading?

1. Load recommended quantity of papers

2. Open the Cover Front and check whether roller or
spring, which are related to paper out, is not out of posi­tion. If so, re-locate or replace.

1. Check whether the spring is expanded or not.

2. Check armature is well installed. It may be unstable
assemble.

3. Remove the Main PBA.

1. Remove the Toner cartridge and open the cover and
press cover open switch lever and measure the voltage
with high voltage probe and sending printing data. If the
voltage is normal, change the toner cartridge.

2. Disassemb le the left side cov er, and check HV of the sol­der side of HVPS and change it.

MPF :
Turn the power off and on. Open and close the Side cover
to return to the original state.

Cassette :
Adjust Guide to fit the paper width.

Skew Is the Guide adjust set to the paper

width?

Stacking

Engine

Error

Document

1. Took out the Stacker extender to support long
papers?

2. Stacked too many papers more than Stacker
can hold?

Check CBF Harness_CN7.
(Main PBA to LSU)

Document is not picked up(in ADF). 1. Check document is well stocked in ADF.

Jam

Document is stopped after it has fed into the

ADF.

Does it curl while coming out? 1. Check the Open Cover whether there are bosses.

Fit the paper width using the Guide adjust.

1. Use extender as per the paper length.

2. The Face-up stack er normally can hold 100 pages when
using 75g/m2, however , stac king capacity can be lowered
depending on the type of papers.

Refer to troubleshooring “ENGINE ERROR”.

2. Check whether document was been fastened together
by staple or clip.

3. Load recommended quantity of papers.

1. Check whether the Reg. sensor is working or not.

2. Check whether the Feed Roller is working or not.

2. Check the ADF ass'y is well assemble.

5-30

Troubleshooting

No Power (LCD NO display LED Off)

Plug in the

power cord?

YES

The power

voltage supplying is

the same as

rating?

YES

The fan

revolves when

powered on?

YES

LEDs blink
once when

powered on?

NO

NO

NO

NO

Check the voltage first and plug
the power cord

Supply the power as the rating

Connections

on board are OK?

YES

Fuse of SMPS

if open?

NO

Re-connect firmly
and re-test

NO

Replace the fuse

YES

Shortage on

the OPE panel

board?

YES

Repair/replace the
board

The connection

NO

error between
controller board
and panel board
or malfunction
of boards.

-> Replace the
boards

YES

Shortage

between 5V and

GND, or between

24V and

GND?

YES

Remove the shortage
or replace the board

NO NO

Toner cartridge

is in the set?

YES

Detect failure due to the
board which detects side
cover open or switch error

-> Replace the board or switch

Put in the
cartridge

5-31

Fuser Error

Measure the resistance
at the both ends of AC
Line with covers open

Troubleshooting

Less than 10W?

YES

Remove the covers

AC is being supplied?

YES

The voltage

of pin #60 of U36

(CPU) on the Main PBA

is about 2.65V when

printing?

NO

NO

NO

Thermostat is open due to the heat etc.

-> Replace the thermostat

The voltage of pin #6 of U5

Re-assemble the top
cover and close it

Thermistor, connecting point or engine
board defect -> Repair/replace the
component/board

on the Main PBA is about

3.2V?
If not check the
CN4 on the power board.

END

YES

5-32

Troubleshooting

Paper Jam (Mis-Feeding)

Sounds the

solenoid on when starts

print?

YES

Does the

paper move?

YES

Does the

paper move more than

100mm?

YES

Feeder

sensor is assembled

reverse?

YES

NO

NO

NO

NO

The Main PBA board defected

-> Replace boards

The solenoid defected

-> Replace it

The pick-up unit is
assembled wrong

-> Re-assemble or replace
the unit

The sensor and
Main PBA defected

-> Repair/replace

Reduce the amount
and re-test

Too many

papers in the

feeder?

YES

Switch them

Paper guides

fit the paper width?

YES

Paper end curled?

YES YES

Use the recommended
and quality paper

NO

NO

Take out the paper
and re-insert

Does the

extender pulled out?

<Recommendation>
Use the MPF for the thick
paper such as envelope
and cardstock

NO

Pull out the
extender

5-33

Paper Jam(Jam 1)

Troubleshooting

Paper

stopped before

the OPC?

Check the LSU and
if it has the defect
replace it

NO NO NO

YES

Paper

stopped before

the fuser?

YES

Severe skew

when feeding?

The

actuator of

paper exit sensor

works OK?

YES

Is the paper

rolled around the

presseure

roller?

YES

Remove the fuser, remove
the paper and replace the
pressure roller, if necessary

NO

NO

The paper

came out through

between fuser and

developer?

Check the actuator exists and its
operation and around the Main PBA

-> Replace

Feeds

multiple pages?

YES

Remove any factors

NO

Check the roller

NO

and ribs of fuser
are in place, and
remove burrs, if
any

-> Remove the
factors of jam

Check the input path
to the fuser (such as
mis-assembly)

YES

Adjust the paper guides to fit the
paper width

The force of springs pressing the
developer is weak

-> Check guide-DEVE

YES

Too thin

or sensitive paper to

static electricity?

YES

Use the recommended
paper

NO

Check guide transfer
is grounded Check
the shutter prevents
feeding

5-34

Troubleshooting

Engine Error

Check

CBF Harness-CN7

(Main B'D to

LSU)

YES

Check

Main B'D CN7-9,

P_MOTOR Signal

( )

YES

Check

Main B'D CN7-8,

LREADY Signal

( )

YES

NO

NO

NO

Try again to connector or
Replace connector

Replace Main PBA

Replace LSU

Check

Main B'D CN7-4,

LDON Signal

( )

YES

Check

Main B'D CN7-1,

HSYNC Signal

( )

YES

END

NO

NO

Replace Main PBA

Replace LSU

5-35

Troubleshooting

5-5-5 Toner Cartridge and Drum Cartridge Service

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

Precautions on Safe-keeping of the Drum Cartridge

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

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.

Service for Judgement of Inferior Expendables and the Standard of Guarantee

Please refer to User's Manual or Instructions on Fax/Printer Expendables SVC for the judgement of inferior
expendables and the standard of guarantee besides this service manual.

5-36

Troubleshooting

5-5-5-1 Signs and Measures at Poor toner cartridge

Fault Signs Cause & Check Solution

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

Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer

• The printed image is
light or unclean and
untidy.

• Some part of the
image is not
printed.

• Periodically a noise
as "tick tick" occurs.

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.

1. All of 1, 2, 3 above­ If it become better by shaking, replace

with a new developer after 50-100
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.)

Toner Contamina-

tion

• Toner is fallen on the
papers periodically.

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

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 matter 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.

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 lac k 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.

5-37

Fault Signs Cause & Check Solution

White Black spot • Light or dark black

dots on the image
occur periodically.

Digital Printer
Digital Printer
Digital Printer

• White spots occur in
the image periodi­cally.

Digital Printer

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)94.3mm interval :

OPC cycle

1. In case of 1 above ­ Run OPC Cleaning Mode Print 5-5 times

repeatedly to remove. Especially check
foreign substance on the OPC surface,
then remove them with a clean gauze
moistened with IP A(Isoprop yl Alcohol) not
to damage OPC if necessary.

Caution : Never use usual alcohol.

Digital Printer

Troubleshooting

Recycled product • Poor appearance of

the developer.

• Unclean and rough
printouts.

• Bad background in
the image.

2. If white spots occur in a black
image at intervals of 94, 29mm, 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. In case of 2
If they are not disappeared by running

OPC Cleaning Mode Print 5-5 times.

: at intervals of 94.3mm -

Replace the developer.

: at intervals of 37.7mm -

Remove foreign substance, Clean the
Charged Roller
: 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 disassembling

the developer.
(2)If materials other than normal parts of

the developer are added or substituted.

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.

2. In case of 2 - If there are any abnormals

in connection with the situation of 1.
(1)It occurs when the developer is recy-

cled over 2 times.
(2)If toner nearly being expired are col-

lected to use, it is judged as the recycled

developer.

5-38

Troubleshooting

Fault Signs Cause & Check Solution

Ghost & Image
Contamination

• The printed image is
too light or dark, or
partially contami­nated black.

• T otally contaminat­edblack.

(Black image

printed out)

1. The printed image is too light or
dark, or partially contaminated
black.

(1)Check whether foreign sub

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

(2)Check whether the terminal

assembly is normal.

1. All of 1, 2, 3 above
(1)Remove toner and foreign substances

adhered to the contact point of the
developer.

(2)The contact point of the unit facing that

of the developer also must be cleaned.

(3)If the terminal assembly is unsafe:

• Fully stick the terminal to or reassemble
it after disassembling.

• Disassemble the side plate and push
the terminal to be stuck, then reassem­ble it.

2. Totally contaminated black.
(Black image printed out)

(1)Check whether foreign sub
stances are stuck to the termi-

nal(point of contact) of the
developer and the state of
assembly.

(Especially check the charged

roller terminal.)

2. In case of 2
It is a phenomenon when the OPC drum

of the developer is not electrically
charged. Clean the terminals of the
charged roller, then recheck it.

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5-5-6 The cause and solutions of bad environment of the software
5-5-6-1 The printer is not working (1)

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

Check and Cause Solution

Troubleshooting

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

2. Printing is nor working in the Windows.

3. Chec k if the printer cable is directly connected to peripheral
devices

5-5-6-2 The printer is not working (2)

1. Replace the printer cable. If the problems not solved even
after the cable replaced, check the amount of the remaining
tone.

2. Check if the connection between PC and printer port is
proper. If you use windows, check if the printer driver 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

3. 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.

• Description : After receiving the printing order , no response at all or the lo w 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 ECP Mode 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.

5-40

Troubleshooting

5-5-6-3 Abnormal Printing

• Description : The printing is not working properly even when the cable has no problem.

(even after the cab le is replaced) If the printer won't work at all or the strange f onts 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 vir-

tual memory, b ut 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. Chec k 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.

5-5-6-4 SPOOL Error

• Description : To spool which stands for "simultaneous peripheral operations online" a computer doc-

ument 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.

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.

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 progr ams 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.

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