Printer 4-Color: Uneven Density In Main Scan Direction - Konica Minolta bizhub C450 Service Manual

Field Service Ver. 1.0 Mar. 2005
18.3.30

Printer 4-Color: uneven density in main scan direction

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Image Transfer
1 Belt Unit
2
3
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 solvent.
(See Maintenance.)
YES Clean dirty belt with a soft cloth.
Change Image Transfer Belt Unit
if belt is damaged.
YES Clean.
NO Reinstall.
YES Change Image Transfer Roller
Unit.
NO Change Image Transfer Roller
Unit.
→ Change Image Transfer Belt
Unit.
→ Change High Voltage Unit/2
(Developing Bias).
→ Change High Voltage Unit/1
(Image Transfer, Neutralizing).
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