Scanner System: Low Image Density Or Rough Image - Konica Minolta bizhub 250 Service Manual

21. Image quality problem
21.3.2

Scanner System: Low image density or rough image

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
1 Shading Sheet
2 Mirrors/Lens/
Original Glass
3 Exposure Lamp
4 PWBs and Con-
nection Cables
5 MFBS Board
6
7 CCD Unit
8
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EDNord - Istedgade 37A - 9000 Aalborg - telefon 96333500
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
Check Item
Shading sheet is dirty.
Mirrors, lens and/or Original Glass are
dirty.
Exposure Lamp is dirty.
Connectors are securely connected with
no bent pins and no breaks in the con-
nection cables.
Connectors on the MFBS Board are
connected properly.
The problem has been eliminated after
performing step 5.
Connectors on the CCD Unit Board are
connected properly.
The problem has been eliminated after
performing step 7.
Field Service Ver. 1.0 Aug. 2005
4036fs4036c0
Result
YES Clean.
YES Clean.
YES Clean.
Change Exposure Lamp.
NO Reconnect.
Replace the connection
cable.
NO Reconnect.
NO Change MFBS Board.
NO Reconnect.
NO Change CCD Unit.
Action