Image Reading System: Blank Streaks Or Bands - Konica Minolta bizhub 160f Service Manual

22. Image quality problem
22.4.6

Image Reading System: Blank Streaks or Bands

A. Troubleshooting Procedures
Step
1 Is the document damaged or dirty?
2 Is the Original Pad dirty?
3 Does the Original Cover not lie flat?
4 Is the surface of the Original Glass dirty?
5 Are the Shading Sheet or back surface of the
Original Glass dirty?
6 Are the mirror or lens dirty?
7 Is the Exposure Lamp dirty?
8 Are there no bent connector pins on the cables
connecting the control boards, are all connec-
tors correctly plugged in, and are no cables
broken?
262
<Sample of Image Quality Problem>
4011T015AA
Check
Confidential – for internal use only, do not distribute
Field Service Ver. 1.0 Apr. 2005
4011T020AA
Result Action
YES Replace the document.
YES Clean it.
YES If the Original Cover is deformed or
the hinges are damaged, replace the
Original Cover.
YES Clean it.
YES Clean them.
YES Clean them.
Replace the Scanner Assy.
YES Clean it.
Replace the Scanner Assy.
NO Correctly plug in the connectors.
Replace connection cables.