Scanner System: Foggy Background - Konica Minolta bizhub 250 Service Manual

Field Service Ver. 1.0 Aug. 2005
21.3.3

Scanner System: Foggy background

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
1 -
2 Original
3 Original Cover
4
5 Shading Sheet
6 Mirrors/Lens/
Original Glass/
Reflectors
7 Exposure Lamp
8 PWBs and Con-
nection Cables
9 MFBS Board
10
11 CCD Unit
12
EDNord - Istedgade 37A - 9000 Aalborg - telefon 96333500
ABCD
ABCD
ABCD
ABCD
ABCD
Check Item
Sunlight or any other extraneous light
enters the machine.
Original is damaged or dirty.
Original Pad is dirty.
Original Cover does not lie flat.
Shading sheet is dirty.
Mirrors, lens, Original Glass and/or
reflectors 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 9.
Connectors on the CCD Unit Board are
connected properly.
The problem has been eliminated after
performing step 11.
21. Image quality problem
4036fs4030c0
Result
YES Protect the copier from
extraneous light.
YES Change original.
YES Clean.
YES Replace Original Cover if
it is deformed or the
hinges are broken.
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
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