Printer Monocolor: Uneven Density In Main Scan Direction - Konica Minolta bizhub C250P Service Manual

Field Service Ver. 2.0 Mar. 2006
25.3.4

Printer Monocolor: uneven density in main scan direction

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Imaging Unit
1
2
PH Unit
3
Image Transfer Belt
4
Unit
5
6
4036fs4046c0
Check Item
The surface of the PC Drum is
scratched.
Dirty on the outside.
The surface of the PH Window is
dirty.
Image Transfer Belt Unit makes
positive contact with plates on rails.
Cam gear operates properly.
The problem has been eliminated
through the checks of steps up to 5.
25. Image quality problem
4036fs4047c0
Result Action
YES Change Imaging Unit.
YES Clean.
YES Clean with cleaning jig.
NO Check and correct con-
tacts.
NO Change Image Transfer
Belt Unit.
NO Change Imaging Unit.
→ Change PH Unit.
→ Change High Voltage
Unit
(Image Transfer, Neutral-
izing).
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