Samsung ML-1651N, ML-1650 specifications Horizontal Black Band, Black/White Spot

Page 31

Troubleshooting

4-2-3 Horizontal Black Band

1. Dark or blurry horizontal stripes occur in the printing periodically.

• Description

(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

1.

Clean each voltage terminal of the Charge,

developer.

 

 

 

Supply, Develop and Transfer roller.

 

 

 

 

(remove the toner particles and paper par-

 

 

 

 

ticles)

2. The rollers of developer may be stained.

2.

Clean the right Gear that has relatively

Charge roller

=

38.5mm

 

small gap of the teeth in the OPC.

Supply roller

=

51mm

 

 

Develop roller =

50mm

 

 

Transfer roller

=

56.8mm

 

 

 

 

 

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 periodi-

1.

Run OPC cleaning Mode Print and run the

cally, the rollers in the Developer may be

 

Self-test 2 or 3 times.

contaminated with foreign matte or paper

 

 

particles.

 

 

( Charge roller : 38.5 mm interval

 

 

OPC drum : 96 mm interval)

 

 

2. If faded areas or voids occur in a black

2.

In case of 96 mm interval unremovable in 1,

image at intervals of 96 mm, or black

 

cleanly remove foreign substances stuck on

spots occur elsewhere, the OPC drum

 

the OPC location equivalent to black spots

surface is damaged.

 

and white spots with a dry duster.

3. If a black image is partially broken, the

3.

The transfer roller guarantees 125,000

transfer voltage is abnormal or the trans-

 

sheets printing. If the roller's life is expired,

fer roller's life has expired.

 

replace it.

 

4.

In case of 38.5 mm interval unremovable in

 

 

1, take measures as to replace the develop-

 

 

er 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.

 

 

 

Samsung Electronics

4-7

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Image 31
Page 30 Page 32
Contents Laser Printer Version no This manual is stated and provided for service description Read each caution carefully Safety PrecautionsReleasing Plastic Latches Precautions on Disassembly and ReassemblyElectronic Scale Tools for TroubleshootingToner ML-1650 ML-1651N EngineController PaperNetwork ML-1650 ML-1651N EnvironmentReleasing Plastic Latches General Precautions on DisassemblyWhenever servicing the machine, you must perform as follows Transfer Roller Controller Board Pickup Assembly Main Cover MP Multi-Purpose Tray Exit AssemblyHvps board LSUSolenoid 10 FanDrive Assembly To remove the halogen lamp from the fuser assembly Fuser AssemblyTo remove the thermistor from the fuser assembly To remove the thermostat from the fuser assemblyGuide Feed & Erase Lamp To replace the nockup plate MPF Assembly and Miscellaneous on MPF AssemblyTo replace the pickup roller To replace the Paper Empty PE sensor To replace the pickup holder and the Adjust End MPEngine Board and Miscellaneous To replace the exit board To remove the transfer guide To replace the actuator feedCause and solution of the malfunction How to use DCUCause and solution of Bad image Cause and solution of the bad dischargeDCU Setup How to use DCUCode Self Diagnostic Mode Paper Path Layout Self Test ButtonDCU Panel ML-1650 Diagnostic Control Unit Quick ReferanceVertical White Line Cause and solution of Bad imageCheck and Cause Solution Vertical Black Line and BandBlack/White Spot Horizontal Black BandDark Image or a Black Light ImageBackground Uneven DensityGhost Satins on the Face Blank Page Print out Satins on BackWrong Print Position Cause and solution of the bad discharge2 JAM 4 JAM 3 JAMPaper rolled in the fuser Multi-Feeding7 OPC All LEDs blinking Fuser Error Cause and solution of the malfunctionAll LEDs blinking Scan Error Paper Empty Not function of the gear of the fuser due to melting awayPaper Empty without indication Cover Open No lamp on when the cover is openDefective motor operation No PowerVertical Line Getting Curved Toner Cartridge Service Image Fault Signs Cause & Check Solution Light imageSigns and Measures at Poor toner cartridge Partially blankRecycled product Fault Signs Cause & Check Solution White Black spotFault Signs Cause & Check Solution Ghost & Image Printer is not working Cause and solutions of bad environment of the softwareUtilities program Abnormal Printing How to delete the data in the spool manager Spool ErrorExploded Views and Parts List Service Parts List Exploded Views and Parts List10-3 10-4 Cover Exploded View All Exploded Views and Parts ListFrame Exploded View Exit Exploded View Rack-MPF Exploded View Fuser Exploded View Drive Exploded View Pick-Up Exploded View Cassette Exploded View Video ControllerBlock Diagram Block DiagramSensor Engine Block DiagramVPS Connection Diagram
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