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16. IMAGE QUALITY PROBLEM
16.2.27
Printer 4-color: uneven density in main scan direction
A. Typical faulty images
B. Troubleshooting procedure
Step
Section
1
Transfer belt unit Fingerprints, oil, or other foreign
2
3
4
Transfer roller
unit
5
6
250
Check item
matter is evident on the transfer
belt.
Transfer belt is dirty or scratched.
Terminal is dirty.
Image transfer roller is installed
properly.
Image transfer roller is dirty or
scratched.
The problem has been eliminated
through the checks of steps up to 5.
Field Service Ver. 1.1 Jun. 2010
Result
Action
YES Clean it with the tender cloth or
paper which is dusted with the
toner.
YES Clean dirty belt with a soft cloth.
Change transfer belt unit if belt is
damaged.
YES Clean.
NO
Reinstall.
YES Change transfer roller unit.
NO
Change transfer belt unit.
Change high voltage unit.
A02EF4C521DA
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