Printer 4-Color: Void Areas, White Spots - Konica Minolta bizhub C350 Service Manual

Image quality problem
4.3.34

Printer 4-Color: void areas, white spots

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Image Check
1
2
Transfer Belt Unit Fingerprints, oil, or other foreign
3
4
5 Transfer Roller
Unit
6
Paper path
7
8
Paper Dust
9
Remover
10
4-94
Void areas
4036fs4050c0
Check Item
There are void areas at the front
side or high density section.
There are void areas in the trailing
edge.
matter is evident on the Transfer
Belt.
Transfer Belt is dirty or scratched.
Transfer Roller is dirty or scratched. YES Change Transfer Roller Unit.
Charge Neutralizing Cloth is not
separated and ground terminal is
connected properly.
There is foreign matter on paper
path.
Pre-Image Transfer Guide Plate is
damaged or dirty.
Paper dust accumulates on Paper
Dust Remover.
The problem has been eliminated
through the checks of steps up to 9.
bizhub C350 Field Service Ver2.0 Sep. 2004
White spots
4036fs4051c0
Result
☞ 4-91
YES
YES Perform "2nd Transfer Adjust" of
"Image Adjust" under Tech. Rep.
mode.
YES Clean with specified solvent.
(See Maintenance.)
YES Clean dirty belt with a soft cloth.
Change Transfer Belt Unit if belt
is damaged.
NO Correct or change.
YES Remove foreign matter.
YES Clean or change.
YES Clean or change.
NO Change Image Transfer Roller
Unit.
Change Image Transfer Belt
Unit.
Action