Samsung ML-2010 Troubleshooting

Troubleshooting

Samsung Electronics

Service Manual

6-1

6

6. Troubleshooting

6.1 Checking Symptoms

Before attempting to repair the printer first obtain a detailed description of the problem from the customer.

Power On

Indicate

"Lamp toggle"

On-Line LED

Green OK?

Print(test pattern)

printing

Quality is

Nomal?

Refer to "Solution

of Image Problem"

Refer to

"Chapter 4.4"

END

- No Power

- Power Module error

- Main PBA

On-Line LED

ON?

Samsung Electronics

Service Manual

Troubleshooting

6-2

6.1.1 Basic Check List

1. Check the Power.

• Does "Warming Up" appear on the display?

--> If not check power cable, switch or SMPS.

--> Does the wall socket work?

• Do the Motors or other components initialize (listen for main motor, fan and LSU sounds)?

--> If not or there are none of the normal startup sounds check cable, switch or SMPS.

--> Does the wall socket work?

2. Check the LED of Panel.

• Is there On-Line LED ON?

--> If not check power cable, switch SMPS or Main board.

--> Does the wall socket work?

• Is the abnormal Lamp?

--> Check the main PBA and cable harness.

3. Check the Paper Path

• Is there a Paper Jam?

--> Remove any paper fragments caught in the paper path.

• Paper Jam occurs repeatedly at a specific point in the Paper Path

--> Open the fuser cover, Jam clear.

--> Dismantle the machine and carefully inspect the region where the jam occurs.
(Especially, check if paper fragments are caught in the Fuser

4. Print the Information Page (Configuration).

• Try printing a test page from a computer.

--> If there is an error check cables and driver installation.

5. Check the Print Quality.

•Is there are a Print Quality Problem?

--> Refer to section 6.5 (Page 6-17).

6. Check consumables (toner etc.).

•Using the keys print the Test Pattern.

--> Expected life of various consumable parts, compare this with the figures printed and replace as required

Troubleshooting

Samsung Electronics

Service Manual

6-3

6.1.2 Initial Inspection

1. Check Power part

1. The printer does not work no matter how long you wait.
A. Is the Power Switch (printer and wall socket) turned on ?
B. Is the Power Cord connected to the printer correctly ?
C. Is the Power cord connected to the wall socket correctly ?
D. Is wall socket working ?
E. Is the unit rated at the same voltage as the supply ?

2. Does the Fan work when power is turned on?
A. Check the connectors on the SMPS.
B. Check the fuses in the SMPS.(F1)

2. Check the Installation Environment.

1. Ensure the installation surface is flat, level and free from vibration.

If necessary move the printer.

2. Ensure that the temperature and humidity of the surroundings are within specification

If necessary move the printer.

3. Ensure that the printer is position away from any air conditioning or other heating or cooling equipment. Also ensure
that is not positioned in a direct draft from any air conditioning, fan or open window.

If necessary move the printer.

4. Ensure the printer is not positioned in direct sunlight.

If it is unavoidable use a curtain to shade the printer.

5. Ensure the printer is installed in a clean dust free environment.

Move the printer to clean area if necessary.

6. Some industrial or cleaning processes give of fumes which can affect the printer.

Move the printer away from this type of air pollution

3. Check paper type.

1. Use only paper which is of a suitable quality, weight and size?

See the user guide.

4. Check the overall condition of the printer

1. Is the printer properly maintained ?

Clean the Paper Transport Passages.
Any rollers with dirt surfaces should be cleaned or replaced.

Samsung Electronics

Service Manual

Troubleshooting

6-4

• 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 or Sensor.

6.2.2 JAM 0

• Description

1. Paper is not exited from the cassette.

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

BIN PATH

6.2 Bad discharge

6.2.1 Wrong Print Position

Troubleshooting

Samsung Electronics

Service Manual

6-5

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.

6.2.3 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.

BIN PATH

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.

6.2.4 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.

BIN PATH

Samsung Electronics

Service Manual

Troubleshooting

6-6

6.2.5 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.

6.2.6 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.

Troubleshooting

Samsung Electronics

Service Manual

6-7

6.2.7 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.

Samsung Electronics

Service Manual

Troubleshooting

6-8

6.3 Malfunction

6.3.1 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.

6.3.2 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.

Troubleshooting

Samsung Electronics

Service Manual

6-9

6.3.3 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.

6.3.4 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.

6.3.5 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.

Samsung Electronics

Service Manual

Troubleshooting

6-10

6.3.6 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.

6.3.7 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 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.

Troubleshooting

Samsung Electronics

Service Manual

6-11

6.3.8 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.

6.3.9 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.

Samsung Electronics

Service Manual

Troubleshooting

6-12

6.3.10 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.

Troubleshooting

Samsung Electronics

Service Manual

6-13

6.4 Bad Software Environment

6.4.1 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.

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.

Samsung Electronics

Service Manual

Troubleshooting

6-14

6.4.2 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.

Troubleshooting

Samsung Electronics

Service Manual

6-15

6.4.3 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.

Samsung Electronics

Service Manual

Troubleshooting

6-16

6.4.4 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.

Troubleshooting

Samsung Electronics

Service Manual

6-17

6.5 Bad image

6.5.1 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.

6.5.2 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.

Samsung Electronics

Service Manual

Troubleshooting

6-18

6.5.3 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.
OPC Drum = 75.5mm
Charge Roller = 37.7mm
Supply Roller = 47.5mm
Develop Roller = 35.2mm
Transfer Roller = 46.2mm
Heat Roller = 63.9mm
Pressure Roller = 75.4mm

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.

6.5.4 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 50.000
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.

Troubleshooting

Samsung Electronics

Service Manual

6-19

6.5.5 Light Image

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

Digital Printer
Digital Printer
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.

6.5.6 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.

Samsung Electronics

Service Manual

Troubleshooting

6-20

6.5.7 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.

6.5.8 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 2,000 sheets with
5% image.

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.

Troubleshooting

Samsung Electronics

Service Manual

6-21

6.5.9 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(50.000 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.

6.5.10 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

Digital Printer

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.

Samsung Electronics

Service Manual

Troubleshooting

6-22

6.5.11 Ghost (3)

• Description White ghost occurs in the black image printing at 47.5mm intervals.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

47.5mm

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.

6.5.12 Ghost (4)

• Description Ghost occurs at 47.5mm(or 63.9mm) intervals.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

47.5 or 63.9mm

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)

6.5.13 Stains 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, stains
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.

Troubleshooting

Samsung Electronics

Service Manual

6-23

6.5.14 Stains 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.

6.5.15 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.

6.5.16 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.