Scanner System: Low Image Density Or Rough Image - Konica Minolta magicolor 2490MF Service Manual

Field Service Ver. 1.0 Jul. 2006
17.2.2

Scanner system: Low image density or rough image

A. Typical faulty images
B. Troubleshooting procedure
Step Section
Shading
1 Shading sheet is dirty.
sheet
Mirrors/Lens/
2 Mirrors, lens and/or original glass are dirty.
Original glass
3 Scanner unit Exposure lamp is dirty.
PWBs and Connectors are securely connected with no
4 connection bent pins and no breaks in the connection
cables cables.
Connectors on the image processing board
5
are connected properly.
Image pro-
cessing board
The problem has been eliminated after per-
6
forming step 5.
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
4036fs4036c0
Check Item
17. Miscellaneous errors
Result Action
YES Clean.
YES Clean.
Clean.
YES
Change scanner unit.
Reconnect.
NO Replace the connection
cable.
NO Reconnect.
Change image process-
NO
ing board.
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