Printer Monocolor: Blank Copy, Black Copy - Konica Minolta bizhub C25 Service Manual

22. IMAGE QUALITY PROBLEM
22.2.22

Printer monocolor: blank copy, black copy

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 Image check
2 Imaging unit
3
4 High voltage unit
5
366
Blank copy
Check item
A blank copy occurs.
Coupling of drum unit drive mech-
anism is installed properly.
The PC drum charge corona
voltage contact or PC drum
ground contact of the imaging unit
is connected properly.
Connector is connected properly.
The problem has been eliminated
through the check of step 4.
Field Service Ver. 1.1 May 2011
Black copy
Result Action
YES Check PH unit connector for
proper connection.
NO Check and correct drive
transmitting coupling.
Change imaging unit.
NO Check, clean, or correct the con-
tact.
NO Reconnect.
NO Change high voltage unit.
 Change printer control board
 Change PH unit.
 Change MFP board/1.
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