Image Reading Section: Periodically Uneven Image - Konica Minolta Bizhub 162 Service Manual

17. Image quality problem
17.2.10

Image Reading Section: Periodically uneven image

A. Typical Faulty Images
B. Troubleshooting Procedure
Step
Scanner Motor (M5) is securely fastened using the dedi-
1
cated fixing screws.
2 Scanner Motor (M5) drive mechanism is dirty or damaged.
Scanner drive mechanism pulley is dirty with foreign mat-
3
ter, scratchy, deformed, worn, or damaged.
4 Scanner Drive Cables are wound incorrectly.
Scanner rails and Bearings are dirty with foreign matter,
5
scratchy, deformed, worn, or damaged.
Scanner moves smoothly.
<Check Procedure>
6
Gently move the Scanner by hand to check for smooth
operation.
7 CCD Board (PWB-J) connector is loose.
8 Control Board (PWB-C/C) connector is loose.
164
Check
Field Service Ver. 1.0 Apr. 2005
4011T528AA
Result
NO • Secure in position.
YES • Clean or change.
• Remove foreign matter
YES
or change.
• Re-wind Scanner Drive
YES
Cables.
YES • Clean or change.
• Lubricate the Scanner
NO rails.
• Reinstall Scanner.
YES • Reconnect.
YES • Reconnect.
• Change CCD Unit.
NO • Change Control Board
(PWB-C/C).
Action