Konica Minolta Bizhub-C31P, Service Manual, Page: 262 / 370

Field Service V er. 1.0 Apr. 200 8 16. Image quality problems
225
bizhub C31P
T
roubleshooting
16.1.5 Low image density
A. Typical faulty images
B. Troubleshooting procedure
A0EAF4C505DA
Step Section Check item Result Action
1
Adjustment
/Setting
The printer is being operated in
the climate such as dry or highly
humid.
YES
Adjust the image with “TRANS-
FER POWER”
→
SER V ICE MENU/ALIGNMENT
/TRANSFER POWER/
2 Imaging unit Is the outside dirty? YES Clean.
3 PH unit Is the window surface dirty? YES Clean.
4
Transfer belt
Is the contact on the rail of the
transfer belt in good contact with
the mating part?
NO Check or correct contact.
5 Is the terminal dirty? YES Clean.
6 Media Is the media damp? YES
Replace the media with media
that has just been unwrapped.
7
IDC sensor
board/Re, Fr
Is the sensor dirty? YES Clean.
8
Has the problem been eliminated
through the checks of steps up to
7?
NO
Change the imaging unit.
Change the transfer belt.
Change the PH unit.
Change the IDC sensor board.
Change the print control board.
Change the high voltage unit/1.
Change the high voltage unit/2.