Olivetti d-Color MF651 Service Manual page 928

22. IMAGE QUALITY PROBLEM
22.3.6 Scanner system: incorrect color image registration, sync shift (lines in
main scan direction)
A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 Original
2 ADF
3 Scanner rails
4 Drive cables
5 Exposure unit
6
868
AA
AA
Check item
Original does not lie flat.
ADF does not lie flat.
Foreign matter on rails.
Cable kinks or is damaged.
Scanner moves smoothly.
The problem has been eliminated
through the checks of steps up to 5.
Service Manual
Field Service Ver. 2.0 Jul. 2009
Result Action
YES Change original.
YES Change ADF if it is deformed or
hinges are broken.
YES Clean and apply lubricant.
YES Correct or change.
NO Adjust the scanner motor timing
belt.
Change bushing.
Change scanner motor.
Change scanner relay board.
NO Change CCD unit.
A02EF4C512DA
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