Xerox Phaser 6120 Service Manual page 113

White Lines, White Bands, Colored Lines, and Colored Bands in
the Scan Direction (CD)
Typical Faulty Images
White lines in CD White bands in CD
4036fs4025c0
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 Toner Is the developing bias contact
Cartridge terminal in good contact?
5 Laser Unit Is the connector or contact terminal
(PH) of the Laser Unit (PH) Unit connected
properly?
6 Transfer Belt Is the Transfer Belt dirty or
Unit scratched?
7 Is the 2nd Transfer Roller dirty or
scratched?
8 Paper path Is there a foreign object in the paper
path?
9 Fusing Unit Is the Fusing Entrance Guide Plate
dirty or scratched?
10 Is the Separation Claw dirty?
11 Have steps 1-10 eliminated the
problem?
Phaser® 6120 Color Laser Printer Service Manual
Colored lines in CD
4036fs4026c0
Check Item Result
YES
YES
NO
NO
NO
YES
YES
YES
YES
YES
NO
4-25
Image-Quality Problems
Colored bands in CD
4036fs4028c0
4036fs4027c0
Action
Replace the Imaging Unit.
Clean.
Clean the contact terminal or
reconnect the connector.
Clean the contact terminal or
check the terminal position.
Clean the contact terminal or
reconnect the connector.
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 Power Unit.