Scanner System: Black Streaks Or Bands - Konica Minolta magicolor 2490MF Service Manual

Field Service Ver. 1.0 Jul. 2006
17.2.4

Scanner system: Black streaks or bands

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 Original Original is damaged or dirty.
Shading
2 Shading sheet is dirty.
sheet
Mirrors/Lens/
3 Mirrors, lens and/or original glass are dirty.
Original glass
4 Scanner unit Exposure lamp is dirty.
PWBs and Connectors are securely connected with no
5 connection bent pins and no breaks in the connection
cables cables.
Connectors on the image processing board
6
are connected properly.
Image pro-
cessing board
The problem has been eliminated after per-
7
forming step 6.
4036fs4023c0
Check Item
17. Miscellaneous errors
4036fs4024c0
Result Action
YES Change original.
YES Clean.
YES Clean.
Clean.
YES
Change scanner unit.
Reconnect.
NO Replace the connection
cable.
NO Reconnect.
Change image processing
NO
board.
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