Field Service Ver. 1.0 Jun. 2008
19. Image quality problem
357
T
roubleshooting
19.3.34
Printer 4-color: void areas, white spots
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C523DA
Void areas
White spots
Step
Section
Check item
Result
Action
1
Image check
There are void areas at the front
side or high density section.
YES
P.355
2
There are void areas in the trailing
edge.
YES
Perform [Transfer Adjust] of
[Image Process Adjustment]
under Service Mode.
3
Transfer belt unit
Fingerprints, oil, or other foreign
matter is evident on the transfer
belt.
YES
Clean.
4
Transfer belt is dirty or scratched.
YES
Clean dirty belt with a soft cloth.
Change transfer belt unit if belt is
damaged.
5
Transfer roller
unit
Transfer roller is dirty or scratched.
YES
Change 2nd image transfer roller
unit.
6
Charge neutralizing cloth is not
separated and ground terminal is
connected properly.
NO
Correct or change.
7
Paper path
There is foreign matter on paper
path.
YES
Remove foreign matter.
8
Pre-image transfer guide plate is
damaged or dirty.
YES
Clean or change.
9
The problem has been eliminated
through the checks of steps up to 8.
NO
Change transfer belt unit.
d
-Color
M
F
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Y109660-1 Sevice Manual