Printer 4-Color: Uneven Density In Sub Scan Direction - Konica Minolta Magicolor 8650 Service Manual

16. Image quality problem
16.3.15

Printer 4-color: uneven density in sub scan direction

A. Typical faulty images
B. Troubleshooting procedure
Step Section
Transfer belt unit Fingerprints, oil, or other foreign
1
2
3
Transfer roller
4
unit
5
6
362
Confidential – for internal use only, do not distribute
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. 2.0 Nov. 2007
Result Action
YES Clean.
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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