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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
Содержание d-color MF651
Страница 1: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Страница 24: ...MEASURES TO TAKE IN CASE OF AN ACCIDENT S 22 Blank Page...
Страница 27: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Страница 511: ...Field Service Ver 2 0 Jul 2009 10 UTILITY 451 ADJUSTMENT SETTING Blank Page Y110571 1 Service Manual...
Страница 716: ...16 MECHANICAL ADJUSTMENT Field Service Ver 2 0 Jul 2009 656 ADJUSTMENT SETTING Blank Page Service Manual Y110571 1...
Страница 1053: ...UPDATING STATUS DATE UPDATED PAGES PAGES CODE 10 2009 1ST EDITION 1053053 Y110571 1...