19. Image quality problem
Field Service Ver. 1.0 Jun. 2008
352
T
roubleshooting
19.3.29
Printer 4-color: uneven density in sub scan direction
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C526DA
Step
Section
Check item
Result
Action
1
Transfer belt unit Fingerprints, oil, or other foreign
matter is evident on the transfer
belt.
YES
Clean.
2
Transfer belt is dirty or scratched.
YES
Clean dirty belt with a soft cloth.
Change transfer belt unit if belt is
damaged.
3
Terminal is dirty.
YES
Clean.
4
Transfer roller
unit
Image transfer roller is installed
properly.
NO
Reinstall.
5
Image transfer roller is dirty or
scratched.
YES
Change transfer roller unit.
6
The problem has been eliminated
through the checks of steps up to 5.
NO
Change transfer belt unit.
d-Color MF201
Service Manual Y109660-1