Konica Minolta bizhub C360 Service Manual page 797

23. IMAGE QUALITY PROBLEM
23.3.35 Printer 4-color: colored spots
A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 Drum unit
2 Transfer belt unit Fingerprints, oil, or other foreign
3
4 Transfer roller
unit
5 Paper path
6 Fusing unit
7
742
AA AA
Check item
The surface of the PC drum is
scratched.
matter is evident on the image
transfer belt.
Transfer belt is dirty or scratched.
Transfer roller is dirty or scratched.
There is foreign matter on paper
path.
Fusing belt is dirty or scratched.
The problem has been eliminated
through the checks of steps up to 6.
Field Service Ver. 2.1 Feb. 2012
Result Action
YES Change drum unit.
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 Change transfer roller unit.
YES Remove foreign matter.
YES Change fusing unit.
NO Change transfer belt unit.
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