Samsung ML-1651N, ML-1650 specifications Fault Signs Cause & Check Solution Ghost & Image

Page 49

Troubleshooting

Fault

Signs

Cause & Check

Solution

 

 

 

 

Ghost & Image

• The printed image

1. The printed image is too light

1. All of 1, 2, 3 above

Contamination

is too light or dark,

or dark, or partially contami-

(1)Remove toner and foreign sub-

 

or partially contami-

nated black.

stances adhered to the contact

 

nated black.

(1)Check whether foreign sub-

point of the developer.

 

 

stance or toner are stuck to

(2)The contact point of the unit

 

• Totally contaminat-

the terminal(point of contact)

facing that of the developer

 

edblack.

of the developer.

also must be cleaned.

 

(Black image print-

(2)Check whether the terminal

(3)If the terminal assembly is

 

ed out)

assembly is normal.

unsafe:

 

 

 

• Fully stick the terminal to or

 

• The density of print-

 

reassemble it after disassem-

 

outs is too dark and

 

bling.

 

ghost occurs.

 

• Disassemble the side plate and

 

 

 

push the terminal to be stuck,

 

 

 

then reassemble it.

 

 

2. Totally contaminated black.

2. In case of 2

 

 

(Black image printed out)

It is a phenomenon when the

 

 

(1)Check whether foreign sub-

OPC drum of the developer is not

 

 

stances are stuck to the ter-

electrically charged. Clean the

 

 

minal(point of contact) of the

terminals of the charged roller,

 

 

developer and the state of

then recheck it.

 

 

assembly.

 

 

 

(Especially check the

 

 

 

charged roller terminal.)

 

 

 

3. The printed image is dark and

3. In case of 3

 

 

ghost occurs.

It is a phenomenon as the devel-

 

 

(1)Check foreign substance

oping bias voltage of the devel-

 

 

attached to the terminal

oper. Clean the terminals of the

 

 

(point of contact) of the

developing roller, then recheck it.

 

 

developer and the state of

 

 

 

assembly.

 

 

 

(Especially check the devel-

 

 

 

oping roller terminal.)

 

 

 

 

 

Samsung Electronics

4-25

Page 48 Page 50
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Page 48 Page 50
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 TroubleshootingController ML-1650 ML-1651N EnginePaper TonerNetwork 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 thermistor from the fuser assembly Fuser AssemblyTo remove the thermostat from the fuser assembly To remove the halogen lamp 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 Bad image How to use DCUCause and solution of the bad discharge Cause and solution of the malfunctionDCU Setup How to use DCUCode Self Diagnostic Mode Paper Path Layout Self Test ButtonDCU Panel ML-1650 Diagnostic Control Unit Quick ReferanceCheck and Cause Solution Cause and solution of Bad imageVertical Black Line and Band Vertical White LineBlack/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 Signs and Measures at Poor toner cartridge Fault Signs Cause & Check Solution Light imagePartially blank ImageRecycled 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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