Samsung ML-1210, ML-1220, ML-1250 Troubleshooting

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.

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