Field Service Ver. 2.0 Mar. 2006
25. Image quality problem
349
bizhub C250P
T
roubleshooting
25.3.4
Printer Monocolor: uneven density in main scan direction
A. Typical Faulty Images
B. Troubleshooting Procedure
4036fs4046c0
4036fs4047c0
Step
Section
Check Item
Result
Action
1
Imaging Unit
The surface of the PC Drum is
scratched.
YES
Change Imaging Unit.
2
Dirty on the outside.
YES
Clean.
3
PH Unit
The surface of the PH Window is
dirty.
YES
Clean with cleaning jig.
4
Image Transfer Belt
Unit
Image Transfer Belt Unit makes
positive contact with plates on rails.
NO
Check and correct con-
tacts.
5
Cam gear operates properly.
NO
Change Image Transfer
Belt Unit.
6
The problem has been eliminated
through the checks of steps up to 5.
NO
Change Imaging Unit.
→
Change PH Unit.
→
Change High Voltage
Unit
(Image Transfer, Neutral-
izing).
bizhub_C250P_Total.book 349 ページ 2006年3月27日 月曜日 午前8時28分