Olivetti d-color MF651, Service Manual, Page: 946 / 1053

22. IMAGE QUALITY PROBLEM Field Service Ver. 2.0 Jul. 2009
886
TROUBLESHOOTING
22.3.22 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.881
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].
Service Manual Y110571-1