Print-Quality Problems - Xerox Phaser 6100 Service Manual

8.2 Print-Quality Problems

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Example
Driver installation problem.
Toner cartridge contacts are dirty or
not making good contact.
Toner cartridge is empty or low (when
printing a single color image).
Transfer belt contacts are dirty or not
making good contact or there is a faulty
transfer belt.
Laser cable harness plugs not seated
properly or faulty laser unit.
Toner transfer problem.
Completely Black Image
Example
Imaging Unit BIAS contacts are dirty or
not making good contact.
Charge Voltage of the imaging unit is
unstable.
Possible Cause
Possible Cause
Sequence of Repair Actions
Try printing a Demo Page.
Check that the printer driver is installed correctly.
Check and clean the toner cartridge contacts.
Re-seat the toner cartridge.
Replace the toner cartridge.
Check and clean the transfer belt contacts.
Re-seat the transfer belt.
Replace the transfer belt
Verify the connectors on the laser unit and main
board are properly seated (CN12).
Replace the laser unit or harness as required.
Check all HV contacts and harnesses.
Replace the HVPS.
Sequence of Repair Actions
Clean the contacts.
Replace the imaging unit.
Replace the HVPS Board.
Service Manual 8-5
Troubleshooting