19. Image quality problem Field Service Ver. 1.0 Jun. 2008
358
Troubleshooting
19.3.35 Printer 4-color: colored spots
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C509DA
AA
Step Section Check item Result Action
1
Imaging unit The surface of the PC drum is
scratched.
YES Change imaging unit.
2
Transfer belt unit Fingerprints, oil, or other foreign
matter is evident on the image
transfer belt.
YES Clean.
3
Transfer belt is dirty or scratched. YES Clean dirty belt with a soft cloth.
Change transfer belt unit if belt is
damaged.
4
Transfer roller
unit
Transfer roller is dirty or scratched. YES Change transfer roller unit.
5
Paper path There is foreign matter on paper
path.
YES Remove foreign matter.
6 Fusing unit Fusing belt is dirty or scratched. YES Change fusing unit.
7
The problem has been eliminated
through the checks of steps up to 6.
NO Change transfer belt unit.
d-Color MF201
Service Manual Y109660-1
d-Color MF201