Printer Monocolor: Colored Spots - Konica Minolta bizhub C250P Service Manual

25. Image quality problem
25.3.9

Printer Monocolor: colored spots

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Imaging Unit
1
2
3
356
Colored spots
AA AA
4036fs4052c0
Check Item
Developing bias contact terminal
makes good connection.
The surface of the PC Drum is
scratched.
Dirty on the outside.
Field Service Ver. 2.0 Mar. 2006
Result Action
NO Clean contact terminal
and check terminal posi-
tion.
YES Change Imaging Unit.
YES Clean.