Xerox Phaser 6120 Service Manual - page 114
Image-Quality Problems
Phaser® 6120 Color Laser Printer Service Manual
4-26
Uneven Density in the Feed Direction
Typical Faulty Images
Troubleshooting Procedure
Step
Section
Check Item
Result
Action
1
Imaging Unit Are there scratches or lines evident
on the photo conductor surface?
YES
Replace the Imaging Unit.
2
Is the outside of the imaging unit
dirty?
YES
Clean.
3
Laser (PH)
Unit
Is the window surface dirty?
YES
Clean.
4
Transfer Belt
Unit
Is the Transfer Belt dirty or
scratched?
YES
Wipe the surface clean of dirt with
a soft cloth.
Replace the scratched Transfer
Belt with a new Transfer Belt Unit.
5
Is the terminal dirty?
YES
Clean.
6
Is the 2nd Transfer Roller dirty or
scratched?
YES
Replace the Transfer Roller.
7
Have steps 1-6 eliminated the
problem?
NO
■
Replace the Problem Toner
Cartridge.
■
Replace the Laser Unit (PH).
■
Replace High Voltage Unit.
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