Printer 4-Color: Uneven Density In Sub Scan Direction - Konica Minolta bizhub C25 Service Manual

22. IMAGE QUALITY PROBLEM
22.2.26

Printer 4-color: uneven density in sub 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
370
Check item
matter is evident on the transfer
belt.
Transfer belt is dirty or scratched.
Terminal is dirty.
Transfer roller is installed properly.
Transfer roller is dirty or scratched.
The problem has been eliminated
through the checks of steps up to 5.
Field Service Ver. 1.1 May 2011
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.
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