Xerox Phaser 6120

Image-Quality Problems
Phaser® 6120 Color Laser Printer Service Manual
4-30
Foggy Background
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 Is the connector or contact terminal
of the Imaging Unit connected
properly?
NO Clean the contact terminal or
reconnect the connector.
4 Toner
Cartridge
Is the developing bias contact
terminal in good contact?
NO Clean the contact terminal or
check the terminal position.
5 Laser (PH)
Unit
Is the connector or contact terminal
of the Laser Unit (PH) Unit connected
properly?
NO Clean the contact terminal or
reconnect the connector.
6 Is the window surface dirty? YES Clean.
7 Density
Sensor
Is the Density (AIDC) sensor dirty? YES Clean. It is located on top of the
transfer belt.
8 Have steps 1-7 eliminated the
problem?
NO
■ Replace the Toner Cartridge.
■ Replace the Laser Unit (PH).
■ Replace the Transfer Belt.
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