Konica Minolta BIZHUB 163 Service Manual page 215

16. Image quality problem
16.2.5 Image reading section: Black streaks or bands
A. Typical faulty images
B. Troubleshooting procedure
Step
1 Original glass is dirty, scratchy, worn, or damaged.
Shading sheet reading portion (the portion on the back-
2 side of the original glass to which original width scale is
affixed) is dirty.
3 Scanner mirrors are dirty, scratchy, or damaged.
4 Exposure lamp (LA1) is dirty.
CCD unit lens and CCD surface are dirty or scratchy.
5 <Check procedure>
Remove lens cover to check for possible contamination.
6 CCD board (CCDB) connector is loose.
7 MFP board (MFPB) connector is loose.
180
Black streaks
Check
Field Service Ver. 1.0 Apr. 2007
Black bands
Result Action
YES • Clean or change.
YES • Clean.
YES • Clean or change.
YES • Clean or change.
YES • Clean or change.
YES • Reconnect.
YES • Reconnect.
• Change CCD unit.
NO • Change MFP board
(MFPB).
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