Printer 4-Color: Uneven Density In Main Scan Direction - Konica Minolta bizhub C250 Service Manual

Field Service Ver. 3.0 Aug. 2006
18.3.29

Printer 4-Color: uneven density in main scan direction

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Image Transfer Belt
1 Unit
2
3
2nd Image Transfer
4
Roller Unit
5
6
4036fs4046c0
Check Item
Fingerprints, oil, or other foreign
matter is evident on the Image
Transfer Belt.
Image 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.
18. Image quality problem
4036fs4047c0
Result Action
YES Clean with specified sol-
vent.
(See Maintenance.)
YES Clean dirty belt with a soft
cloth.
Change Image Transfer
Belt Unit if belt is dam-
aged.
YES Clean.
NO Reinstall.
YES Change 2nd Image Trans-
fer Roller Unit.
NO Change Image Transfer
Belt Unit.
→ Change High Voltage
Unit (Image Transfer,
Neutralizing).
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