Konica Minolta bizhub C200 Service Manual page 446

Field Service Ver. 2.0 Dec. 2008
19.3.28 Printer 4-color: white lines, white bands, colored lines and colored bands
in main scan direction
A. Typical faulty images
White lines in main
scan direction
B. Troubleshooting procedure
Step Section
Transfer belt unit Fingerprints, oil, or other foreign
1
2
Transfer roller
3
unit
Paper path
4
5
Fusing unit
6
7
Neutralizing
8 brush
9
White bands in
main scan direction
Check item
matter is evident on the transfer
belt.
Transfer belt is dirty or scratched.
Transfer roller is dirty or scratched.
There is foreign matter on paper
path.
Image transfer paper separator
fingers are damaged or dirty.
Fusing entrance guide plate is dirty
or damaged.
Fusing paper separator fingers are
dirty.
The resistance values between the
neutralizing brush and the ground
terminal is not ∞.
The problem has been eliminated
through the checks of steps up to 9.
19. Image quality problem
Colored lines in main Colored bands in
scan direction main scan direction
Result
YES Clean.
YES Clean dirty belt with a soft cloth.
Change transfer belt unit if belt is
damaged.
YES Change transfer roller unit.
YES Remove foreign matter.
YES Clean or change.
YES Clean.
Change fusing unit.
YES Clean.
NO Check the contact modify.
Change neutralizing brush.
NO Change printer control board
A02EF4C508DA
Action
405