Printer Monocolor: Blank Print, Black Print - Konica Minolta Magicolor 8650 Service Manual

16. Image quality problem
16.3.11

Printer monocolor: blank print, black print

A. Typical faulty images
B. Troubleshooting procedure
Step Section
Image check
1
Imaging unit
2
3
4 High voltage unit
5
358
Confidential – for internal use only, do not distribute
Blank print
Check item
A blank print occurs.
Coupling of IU drive mechanism
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. 2.0 Nov. 2007
Black print
Result Action
YES Check PH unit connector for
proper connection.
NO Check and correct drive
transmitting coupling.
Change IU.
NO Check, clean, or correct the con-
tact.
NO Reconnect.
NO Change high voltage unit.
→ Change printer control board.
→ Change PH unit.
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