4.Image Quality Troubleshooting

•If an image quality problem occurs, replace the toner cartridge and drum cartridge with new ones, and then determine whether the cause of the problem is due to one of the car- tridges or another part of the main unit.

Symptom

Cause

Remedy

 

 

 

Blank print

Faulty PC drum

Replace the drum cartridge.

 

 

 

 

 

Replace the print head unit.

 

 

 

 

 

Replace the master board

 

Improper laser exposure

(PWB-A).

 

 

 

 

 

Replace the controller control

 

 

board.

 

 

 

 

 

Replace the master board

 

 

(PWB-A).

 

Poor developing bias

 

 

Replace the controller control

 

 

 

 

board.

0951o211

 

 

 

 

 

Black print

 

Replace the print head.

 

Improper laser exposure

Replace the controller control

 

 

board.

 

 

 

 

 

Replace the master board

 

 

(PWB-A).

 

Improper charging

 

 

Replace the controller

 

 

 

 

control board

0951o213

 

 

 

 

 

White spots

Damp paper

Change the paper.

 

 

 

 

 

Replace the Second image

 

 

transfer roller.

 

 

 

 

 

Replace the master board

 

 

(PWB-A).

 

 

 

 

 

Replace the transport image

 

Poor image transfer

transfer belt unit.

 

 

 

Replace the controller control

 

 

 

 

board.

0951o220

 

 

 

 

 

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