Monocolor: Uneven Density In Main Scan Direction - Konica Minolta magicolor 7450 Service Manual

16. Image quality problem
16.3.4

Monocolor: uneven density in main scan direction

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Imaging Unit
1
2
PH Unit
3
Transfer Belt
4
5
6
218
4036fs4046c0
Check Item
The surface of the PC Drum is
scratched.
Dirty on the outside.
The surface of the PH Window is
dirty.
Transfer Belt makes positive con-
tact with plates on rails.
Cam gear operates properly.
The problem has been eliminated
through the checks of steps up to 5.
Field Service Ver. 1.0 May 2006
4036fs4047c0
Result Action
YES Change Imaging Unit.
YES Clean.
YES Clean with cleaning jig.
NO Check and correct contacts.
NO Change Transfer Belt.
NO Change Imaging Unit.
→ Change PH Unit.
→ Change High Voltage Unit
(Image Transfer, Neutralizing).