Scanner System: Foggy Background - Konica Minolta magicolor 2590MF Service Manual

17. Miscellaneous errors
17.2.3

Scanner system: Foggy background

A. Typical faulty images
B. Troubleshooting procedure
Step Section
Sunlight or any other extraneous light
1 -
enters the machine.
2 Original Original is damaged or dirty.
Shading
3 Shading sheet is dirty.
sheet
Mirrors/Lens/
4 Mirrors, lens and/or original glass are dirty. YES Clean.
Original glass
5 Scanner unit Exposure lamp is dirty.
PWBs and Connectors are securely connected with
6 connection no bent pins and no breaks in the connec-
cables tion cables.
Connectors on the image processing
7
board are connected properly.
Image pro-
cessing board
The problem has been eliminated after
8
performing step 7.
258
ABCD
ABCD
ABCD
ABCD
ABCD
4036fs4030c0
Check Item
Field Service Ver. 1.0 Aug. 2007
Result Action
Protect the copier from extra-
YES
neous light.
YES Change original.
YES Clean.
YES Change scanner unit.
Reconnect.
NO Replace the connection
cable.
NO Reconnect.
Change image processing
NO
board.