Xerox Phaser 6120 Service Manual page 112

White Lines, White Bands, Colored Lines, and Colored Bands in
the Feed Direction (FD)
Typical Faulty Images
White lines in FD White bands in FD
4036fs4021c0
Troubleshooting Procedure
Step Section
1 Imaging Unit Are there scratches or lines evident
on the photo conductor surface?
2 Is the outside of the imaging unit
dirty?
3 Is the connector or contact terminal
of the Imaging Unit connected
properly?
4 Laser Unit Are the connectors or contact
(PH) Unit terminals of the Laser Unit (PH) Unit
connected properly?
5 Is the window surface dirty?
6 Transfer Belt Is the Transfer Belt dirty with
Unit fingerprints or oil?
7 Is the Transfer Belt dirty or
scratched?
8 Is the 2nd Transfer Roller dirty or
scratched?
9 Paper path Is there a foreign object in the paper
path?
10 Fusing Unit Is the Fusing Entrance Guide Plate
dirty or scratched?
11 Is the Separation Claw dirty?
12 Have steps 1-11 eliminated the
problem?
Phaser® 6120 Color Laser Printer Service Manual
Colored lines in FD
4036fs4022c0 4036fs4023c0
Check Item Result
YES
YES
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
4-24
Image-Quality Problems
Colored bands in FD
4036fs4024c0
Action
Replace the Imaging Unit.
Clean.
Clean the contact terminal or
reconnect the connector.
Clean the contact terminal or
reconnect the connector.
Clean.
Clean.
Wipe the surface clean of dirt with
a soft cloth.
Replace the scratched Transfer
Belt with a new Transfer Belt Unit.
Replace the 2nd Transfer Roller.
Remove the foreign object.
Clean.
Replace the Fusing Unit.
Replace the Fusing Unit.
Replace the problem Toner
Cartridge.
Replace the Laser Unit (PH).