Printer Monocolor: Foggy Background - Konica Minolta bizhub C25 Service Manual

22. IMAGE QUALITY PROBLEM
22.2.18

Printer monocolor: foggy background

A. Typical faulty images
B. Troubleshooting procedure
Step Section
1 IDC sensor
2 Imaging unit
3 PH unit
4 Printer control
board (PRCB)
5
362
ABCD
ABCD
ABCD
ABCD
ABCD
Check item
The surface of the IDC sensor is
dirty.
Dirty on the outside.
The surface of the PH window is
dirty.
Check the connection of connectors,
harness, and flat cables between
PRCB and PH unit, and correct if
necessary.
The problem has been eliminated
through the checks of steps up to 4.
Field Service Ver. 1.1 May 2011
A02EF4C510DA
Result Action
YES Clean.
YES Clean.
YES Clean with cleaning jig.
NO Change printer control board.
NO Change imaging unit.
 Change PH unit.
 Change high voltage unit.