Printer Monocolor: Void Areas, White Spots - Konica Minolta Magicolor 8650 Service Manual

Field Service Ver. 2.0 Nov. 2007
16.3.8

Printer monocolor: void areas, white spots

A. Typical faulty images
B. Troubleshooting procedure
Step Section
Image Check
1
2
Imaging unit
3
4
Toner cartridge
5
Installation
6 environment
Confidential – for internal use only, do not distribute
Void areas
Check item
There are void areas at the front
side or high density section.
There is void area at the rear side
section.
The surface of the PC drum is
scratched.
Dirty on the outside.
Foreign matter or caked toner in
the toner cartridge.
Is the atmospheric pressure at the
installation site low?
16. Image quality problem
White spots
Result Action
YES See P.350
YES Perform [TransferOutputAdj] of
[ProcessAdjustment] under Ser-
vice Mode.
YES Change imaging unit.
YES Clean.
YES Remove foreign matter.
YES Make the following adjustment:
[Service Mode] → [ProcessAd-
justment] → [Bias Choice].
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