Scanner System: Blurred Image, Blotchy Image - Konica Minolta bizhub C353 Service Manual

18. Image quality problem
18.3.5

Scanner system: blurred image, blotchy image

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 Original
ADF
2
Original glass
3
2nd/3rd mirrors
carriage
4
5
564
Check item
Original does not lie flat.
ADF does not lie flat.
Original glass tilts.
Scanner is not aligned with the
2nd/3rd mirrors carriage.
The problem has been eliminated
through the checks of steps up to 4.
Field Service Ver. 4.0 Jun. 2008
Result Action
YES Change original.
YES Change ADF if it is deformed or
hinges are broken.
YES Position original glass correctly.
Check original loading position.
YES Perform "Focus Positioning of the
scanner and 2nd/3rd mirrors car-
riage" and "Scanner Position
Adjustment."
NO Change scanner assy.
Change CCD unit.
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