Samsung ML-1200, ML-1210 User Manual 2

SERVICE

LASER PRINTER

ML-1200 Series

ML-1210 / ML-1250 / ML-1220M

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

Printed in Korea.

VERSION NO. : 2.03 CODE : JC-0051A

This service manual is also provided on the web, the ITSELF system Samsung Electronics Co., Ltd.

http://itself.sec.samsung.co.kr

This manual is stated and

provided for service description.

All rights reserved. Any parts of the information in this manual are prohibited from free duplication, use or translation without prior written approval except in cases allowed by the Copyright Act. Specifications are subject to change without prior notice.

Samsung Electronics Digital Printing CS Group

Precautions

1-1

Samsung Electronics

1. Precautions

1-1 Safety Precautions

1-2 Precautions on Disassembly and Reassembly

Please read the following carefully to prevent any accidents and not to damage the unit during service.

1. Safety Precautions There are some electric or machinery parts with safety related property. If the parts replaced are different from the original, the safety may not function. Even if the part could allow higher voltage than that of the part used, do not replace it and use a regular product clarified in specifications.

2. Be careful not to leave a switch, a cover or a safety device out when reinstalling or assembling the product after repair.

3. Replacing Precautions Do not change or add parts as you like. You cannot benefit from such a remodeled product at your will during the term of guarantee.

4. You must replace overheated or damaged parts or cords with regular products. Please solve the problem causing any damage or overheating and troubles beforehand.

Especially mind the safety on the part with this mark.

You must use regular parts described in specifications for the parts inflammable and where the current can be flown. Otherwise any hazard such as an electric shock or a fire could occur.

LASER STATEMENT (LASERTURVALLISUUS)

WARNING : NEVER OPERATE AND SERVICE THE PRINTER

WITH THE PROTECTIVE COVER REMOVED FROM LASER/SCANNER ASSEMBLY. THE REFLECTIVE BEAM, ALTHOUGH INVISIBLE, CAN DAMAGE YOUR EYES.

Class 1 laser product

Luokan 1 laserlaite Klass 1 laser apparat

Allonpituus 770-795nm Teho 0.3mW±0.03mW

CAUTION

VORSICHT

ATTENTION

ATTENZIONE

PRECAUCION

CAUTION : Avoid exposure to invisible laser radiation when the

development unit is not installed.

INVISIBLE LASER RADIATION WHEN THIS COVER OPEN. DO NOT OPEN THIS COVER.

UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG GEOFFNET. NIGHT DEM STRAHLAUSSETZEN.

REYONNEMENT LASER INVISIBLE EN CAS D’OUVERTURE. EXPOSITION DANGERUSE AU FAISCEAU.

RADIAZIONE LASER INVISIBLE IN CASO DI APERTURA. EVITARE L’ESPOSIZONE LA FASCIO.

REDIACION LASER INVISIBLE CUANDO SE ABRE. EVITAR EXPONERSE AL RAYO.

Very careful precautions should be taken when replacing parts. Before replacing, please check cables because you cannot put the cables that you removed for replacing parts into the proper place if you would not make sure of where they were connected and in which condition.

Please do the following before disassembling for a repair or replacement of parts.

1. Pull out paper cassette, printer cartridge installed. Especially careful not to be scratched by the surface of developer or not to expose them to light.

2. Turn the power switch off.

3. Take out the power plug, printer cable from the printer.

4. Use only the same type of part as original when replacing parts.

5. Do not force to open or fasten plastic material compo-

nents.

6. Be careful that small parts such as screws should not get in the printer.

7. When disassembling, assembling, also observe small components are located in place.

8. If you uncover and turn the machine over to replace some parts, toner or paper particles may contaminate the LSU window. Protect the LSU window with clean paper.

Releasing Plastic Latches

Many of 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.

Precautions

1-2

Samsung Electronics

1-3 Tools 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.

DVM(Digital Volt Meter)

Standard: Indicates more than 3 digits.

Electronic Scale

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

Driver

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

Pinset

Standard: For general home use, small type.

Cotton Swab

Standard: For general home use, for medical ser-

vice.

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

Software(Driver) installation CD ROM

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

Note

Ground

Specifications

2-1

Samsung Electronics

2. Specifications

Speed Resolution FROP(Fist Power On Time) Warm-Up T ime Power Consumption Dimension Weight Processor Memory Emulation Interface OS Support

N/W Input Output Manual Media Type

Type Life Cartridge Pick up Roller Feed Roller Transfer Roller Fuser Key & LED LCD Toner Save Reprint

Engine

Controller

Paper

T oner

User interface

ML-1210 (ML-1220M) ML-1250

12ppm

600 x 600 dpi 1200 x 600 dpi

Under 12.5 sec

30 sec

25W (Print), 10W (Sleep)

329 x 355 x 231 mm (13” x 14” x 9.1”)

Max 6.5Kg (With Toner Cartridge) Jupiter 366MHz 61200 66MHz 8MB Equivalent 4MB

SmartGDI PCL6

IEEE1284, USB (ML-1220M : USB ONLY)

Windows 95/98/2000/Me/NT,

Linux(Radhat 6.0), iMac(Mac OS 8.0)

External 150 sheets 100 sheets

1 sheet

A4, Letter. Legal, Executive, B5, A5, Folio,

7 3/4(Monarch), #10, DL, C5, C6, B5

Single Cartridge

2,500 sheets

2,500 (Initial : 1,000)

60,000 60,000 60,000 40,000

3Key, 4LEDs

No YES YES

3-1-1 Front Cover

1. Pull the both side of the cover to open.

2. Remove a screw and remove the stopper that holds the printer cover.

3. Loosen the right lower part of the cover, then push the cover in the direction of arrow to loosen the left lower part.

4. Remove a screw of the front cover PCB and remove the connector, then remove the cover.

3-1-2 Other Covers

1. Before you remove other covers, you should remove the F

ront cover in advance.

2. Rear Cover : Remove the cover in the direction of .

3. Top Cover : Remove the cover in the direction of .

4. Side Cover L, R : Remove the cover in the direction of .

3-1 Cover Assembly

Disassembly and Reassembly

3-1

Samsung Electronics

3. Disassembly and Reassembly

Disassembly and Reassembly

3-2

Samsung Electronics

3-2 LED Panel PBA

1. Before you remove other covers, you should remove.

• Front Cover (see [3-1 Main Cover])

2. Remove two screws of PCB cover, and widen the hooks( ) to remove.

3. Remove two screws, and remove LED panel.

4. Remove PCB from the PCB cover.

3-3 LSU(Laser Scanning Unit)

1. Before you remove LSU, you should remove front cover, rear cover and top cover.

• Main Cover (see [3-1 Main Cover])

2. Remove three screws securing the LSU.

3. Remove two connectors from the LSU, then remove the LSU.

Disassembly and Reassembly

3-3

Samsung Electronics

3-4 Transfer Roller

1. Open the front cover.

2. Use a proper tool("-" type screwdriver) to pull the one end of the roller slightly, then take it out.

3-5 Motor Assembly

1. Before you remove the motor assembly, you should remove:

• Main Cover (see [3-1 Main Cover])

• Shield Engine Assembly

2. Remove five screws securing the motor assembly and remove a connector from engine board(Engine board and SMPS board are integrated), then take the motor assembly out.

Disassembly and Reassembly

3-4

Samsung Electronics

3-6 HVPS Board

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

•Main Cover (see [3-1 Main Cover])

2. Remove four screws and a connector from HVPS board, then take the board out.

3-7 Fuser Assembly

1. Before remove fuser assembly, you should remove:

• Main Cover (see [3-1 Main Cover])

2. Remove two ground screws and a connector as illustrated.

3. Remove two screws and unplug a fuser assembly harness. Then use a " - " screwdriver to unlatch the fuser assembly to remove.

Note

When you reassemble the HVPS board, make sure that five terminals should be put in place.

Terminal

Disassembly and Reassembly

3-5

Samsung Electronics

3-8 Thermostat and Halogen Lamp

1. Remove a screw from the fuser assembly and remove the thermostat cover, then remove two screws securing the thermostat.

2. Remove two screws from the fuser assembly, and take the Heat Roller out.

3. Take the halogen lamp out from the Heat Roller.

Note

When you reassemble the halogen lamp, handle it with care as it is fragile.

Disassembly and Reassembly

3-6

Samsung Electronics

3-9 SMPS Board

1. Before you remove the SMPS board, you should remove:

• Main Cover (see [3-1 Main Cover])

2. Remove screws in the order of then remove the shield engine assembly.

3. Unplug connectors from the main board and connectors from SMPS, then remove the SMPS. Remove four screws from SMPS and remove the SMPS board.

Note

The Engine board and SMPS board are integrated in a body.

Disassembly and Reassembly

3-7

Samsung Electronics

3-10 Main Board and Sensor Board

1. Before you remove the main board, you should remove:

• Main Cover (see [3-1 Main Cover])

• SMPS board (see [3-9 SMPS Board])

2. Remove two screws from the main board and unplug all of connectors, then remove the board.

3. Release four snap-fits securing the insulator engine board and then remove the insulator.

4. Release four snap-fits securing the sensor board and then remove the sensor board.

Main B’d

Troubleshooting

4-1

Samsung Electronics

4. Troubleshooting

4-1 How to use DCU

4-1-1 DCU Setup......................................Page(4-2)

4-1-2 Code ................................................Page(4-2)

4-1-3 Self Diagnostic Mode......................Page(4-3)

4-1-4 Self Test Button ................................Page(4-4)

4-1-5 Paper Path Layout...........................Page(4-4)

4-2 The cause and solution of Bad image

4-2-1 Vertical Black Line and Band..........Page(4-5)

4-2-2 Vertical White Line...........................Page(4-5)

4-2-3 Horizontal Black Band .....................Page(4-6)

4-2-4 Black/White Spot..............................Page(4-6)

4-2-5 Light Image.......................................Page(4-7)

4-2-6 Dark Image or a Black.....................Page(4-7)

4-2-7 Uneven Density................................Page(4-8)

4-2-8 Background ......................................Page(4-8)

4-2-9 Ghost (1)...........................................Page(4-9)

4-2-10 Ghost (2)..........................................Page(4-9)

4-2-11 Ghost (3)..........................................Page(4-10)

4-2-12 Ghost (4) .........................................Page(4-10)

4-2-13 Satins on the Face of Page............Page(4-10)

4-2-14 Satins on Back of Page..................Page(4-11)

4-2-15 Blank Page Print out (1) .................Page(4-11)

4-2-16 Blank Page Print out (2) .................Page(4-11)

4-3 The cause and solution of the bad discharge

4-3-1 Wrong Print Position.......................Page(4-12)

4-3-2 JAM 0...............................................Page(4-12)

4-3-3 JAM 1...............................................Page(4-13)

4-3-4 JAM 2...............................................Page(4-13)

4-3-5 Multi-Feeding...................................Page(4-14)

4-3-6 Paper rolled in the fuser .................Page(4-14)

4-3-7 OPC.................................................Page(4-15)

4-4 The cause and solution of the malfunction

4-4-1 All LEDs blinking (Fuser Error)........Page(4-16)

4-4-2 All LEDs blinking (SCAN ERROR).Page(4-16) 4-4-3 Not function of the gear of the fuser due to

melting away.....................................Page(4-17)

4-4-4 Paper Empty.....................................Page(4-17)

4-4-5 Paper Empty without indication.......Page(4-17)

4-4-6 Cover Open......................................Page(4-18)

4-4-7 No lamp on when the cover is open

...........................................................Page(4-18)

4-4-8 Defective motor operation ...............Page(4-19)

4-4-9 No Power..........................................Page(4-19)

4-4-10 Vertical Line Getting Curved.........Page(4-20)

4-5 Toner Cartridge Service

4-5-1 Precautions on Safe-keeping of Toner Cartridge

..........................................................Page(4-21)

4-5-2 Service for the Life of Toner Cartridge

..........................................................Page(4-21)

4-5-3 Service for Judgement of Inferior Expendables

and the Standard of Guarantee.....Page(4-21)

4-5-4 Signs and Measures at Poor toner cartridge

..........................................................Page(4-22)

4-6 The cause and solutions of bad environment

of the software

4-6-1 The printer is not working (1)...........Page(4-25)

4-6-2 The printer is not working (2) .........Page(4-26)

4-6-3 Abnormal Printing.............................Page(4-27)

4-6-4 SPOOL Error ...................................Page(4-28)

Troubleshooting

4-2

Samsung Electronics

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.

4-1-2 Code

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

Normal Code

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

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

Error Code

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

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 or 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. 95 LSU Not Ready LSU Scanner Motor not ready or Hsync signal not output.

Troubleshooting

4-3

Samsung Electronics

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.

00 Main Motor Operating System

Only the main motor is in operation.

01 Main High Voltage On(THV-)

-1550 voltage output by MHV terminal. Caution : High voltage probe should be

used.

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

-1300 voltage output by MHV terminal. Caution

High voltage probe should be

used.

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

1300 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. Press the [Up] button to switch the voltage. The middle and right one of the three

LEDs

are on and -530 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.

07 Pempty/PWIDTH/New CRU Sensor Test : Pempty/PWIDTH.HEW CRU sensor test.

If activate the Actuator of the PEMPTY/PWIDTH Sensor, the left and right of the three LEDs are on. If you install new toner Cartridge in this mode, the right LED is on.

08 Feed & Exit Sensor Test

Test the Feed sensor and Discharge sensor in the same way as '06'.

09 Cover Open Sensor Test

The same way as code '06'.

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.

Troubleshooting

4-4

Samsung Electronics

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. If no toner cartridge in the printer, output of THV is +199V ~ + 2100V.

14. PTL Test

Indicates the PTL LED.

15. Fan Test

Indicates the function of the fan.

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.

4-1-5 Paper Path Layout

EXIT 2

FUSER

FACE UP

EXIT 1

FEED SEN

EMPTY SEN

KNOCK UPKNOCK UP

LSU

CARTRIDGE

LSU

CARTRIDGE

PICK UP

FEED

IDLE

PTL

RECORDED PAPER (100 SHEETS)

RECORDED PAPER (150 SHEETS)

MANUAL 1 SHEET

EXIT SENSOR

OPC

FACE DOWN

SENSOR BOARDSENSOR BOARD

MAIN BOARDMAIN BOARD

SMPS

SHIELDSHIELD SHIELDSHIELD

H R/L

Pr R/L

Troubleshooting

4-5

Samsung Electronics

4-2 The cause and solution of 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 or deformed Doctor-blade.

2. Scratched surface of the discharge roller in the developer, or heavily accumulated foreign matters between the discharge roller and fur transfer roller/ charge roller.

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 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.

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, check to see if the weight of the developer is below 670g. If so, replace the developer cartridge.

Troubleshooting

4-6

Samsung Electronics

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 mm Supply roller = 27 mm Develop roller = 32 mm Transfer roller = 47 mm

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 mm interval

OPC drum : 75mm interval)

2. If faded areas or voids occur in a black image at intervals of 75 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 75mm 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 37mm 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

4-7

Samsung Electronics

4-2-5 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. (Run self-test and check 1~4)

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.

( Service parts : Figure 11, Chapter 5)

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.

Troubleshooting

4-8

Samsung Electronics

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. Recycled recording paper has been used.

2. The life of the Developer has expired.

(The weight at the expiration of the

developer's life: 800 ± 20g)

3. The up-to-down movement of the transfer roller is swift?

4. The HVPS is normal? (Perform DCU diagnostic code 01~04)

1. B/S is not guaranteed when using recycled paper.

2. Replace the Developer that has expired.

3. Clean the busing part of the transfer roller.

4. Replace the Developer if not solved by the above direction 1~3.

Troubleshooting

4-9

Samsung Electronics

4-2-9 Ghost (1)

• Description Ghost occurs at 75 mm intervals of the OPC drum in the whole printing.

Digital Printer Digital Printer Digital Printer

75mm

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.

(Service Parts : Figure 9 , chapter 5)

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

(Service Parts : Figure 8-2 , chapter 5)

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

4-2-10 Ghost (2)

• Description

Ghost occurs at 75 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

75mm

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.

Troubleshooting

4-10

Samsung Electronics

4-2-11 Ghost (3)

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

Digital Printer Digital Printer Digital Printer

32mm

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.

4-2-11 Ghost (3)

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

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 47mm intervals.

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.

Troubleshooting

4-11

Samsung Electronics

4-2-14 Satins on Back of Page

• Description The back of the page is stained at 47mm 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. (Service Parts : Figure 9 , chapter 5)

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

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