Olivetti d-color MF651, Service Manual, Page: 928 / 1053

22. IMAGE QUALITY PROBLEM Field Service Ver. 2.0 Jul. 2009
868
TROUBLESHOOTING
22.3.6 Scanner system: incorrect color image registration, sync shift (lines in
main scan direction)
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C512DA
AA
AA
Step Section Check item Result Action
1 Original Original does not lie flat. YES Change original.
2 ADF ADF does not lie flat. YES Change ADF if it is deformed or
hinges are broken.
3 Scanner rails Foreign matter on rails. YES Clean and apply lubricant.
4 Drive cables Cable kinks or is damaged. YES Correct or change.
5 Exposure unit Scanner moves smoothly. NO Adjust the scanner motor timing
belt.
o Change bushing.
o Change scanner motor.
o
Change scanner relay board.
6 The problem has been eliminated
through the checks of steps up to 5. NO Change CCD unit.
Service Manual Y110571-1