Field Service Ver. 1.0 Jun. 2008
19. Image quality problem
345
T
roubleshooting
19.3.22
Printer monocolor: 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
See P.340
2
There is void area at the rear side
section.
YES
Perform [Transfer Adjust] of
[Image Process Adjustment]
under Service Mode.
3
Imaging unit
The surface of the PC drum is
scratched.
YES
Change imaging unit.
4
Dirty on the outside.
YES
Clean.
5
Toner cartridge
Foreign matter or caked toner in
the toner cartridge.
YES
Remove foreign matter.
6
Installation
environment
Is the atmospheric pressure at the
installation site low?
YES
Make the following adjustment:
[Service Mode]
o
[Image Pro-
cess Adjustment]
o
[Dev. Bias
Choice].
d
-Color
M
F
201
Y109660-1 Sevice Manual