Konica Minolta bizhub C35 Service Manual page 287

DRAFT
16. IMAGE QUALITY PROBLEM
16.2.25 Printer 4-color: white lines, white bands, colored lines and colored bands
in main scan direction
A. Typical faulty images
White lines
B. Troubleshooting procedure
Step Section
1 Transfer belt unit Fingerprints, oil, or other foreign
2
3 Transfer roller
unit
4 Paper path
5
6 Fuser unit
7
8 Neutralizing
brush
9
248
White bands
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 8.
Field Service Ver. 1.0 Feb. 2010
Colored lines Colored bands
Result Action
YES Clean with specified solvent.
(See Maintenance.)
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 fuser unit.
YES Clean.
NO Check the contact.
Change neutralizing brush.
NO Change printer control board
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