
22. IMAGE QUALITY PROBLEM
Field Service Ver. 2.0 Jul. 2009
898
TROUBLESHOOTING
22.3.34
Printer 4-color: void areas, white spots
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C523DA
Void areas
White spots
Step
Section
Check item
Result
Action
1
Image check
There are void areas at the front
side or high density section.
YES
See P.896
2
There are void areas in the trailing
edge.
YES
Perform [Transfer Adjust] of
[Image Process Adjustment]
under Service Mode.
3
Transfer belt unit
Fingerprints, oil, or other foreign
matter is evident on the transfer
belt.
YES
Clean with specified solvent.
(See Maintenance.)
4
Transfer belt is dirty or scratched.
YES
Clean dirty belt with a soft cloth.
Change transfer belt unit if belt is
damaged.
5
Transfer roller
unit
Transfer roller is dirty or scratched.
YES
Change 2nd image transfer roller
unit.
6
Charge neutralizing needle is not
separated and ground terminal is
connected properly.
NO
Correct or change.
7
Paper path
There is foreign matter on paper
path.
YES
Remove foreign matter.
8
Pre-image transfer guide plate is
damaged or dirty.
YES
Clean or change.
9
The problem has been eliminated
through the checks of steps up to 8.
NO
Change transfer belt 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...