Printer Monocolor: Blank Copy, Black Copy - Konica Minolta Bizhub C350 Service Manual

bizhub C350 Field Service Ver. 2.0 April 2004
4.3.23

Printer Monocolor: blank copy, black copy

A. Typical Faulty Images
B. Troubleshooting Procedure
Step Section
Image Check
1
Imaging Unit
2
3
High Voltage Unit/
4 1 (Image Transfer,
Neutralizing)
5
Blank copy
4036fs4038c0
Check Item
A blank copy 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 step4.
4-81
Image quality problem
Black copy
4036fs4039c0
Result
YES Check LPH Unit connector for
proper connection.
Check the LED Drive Board con-
nectors for proper connection.
NO Check and correct drive transmit-
ting coupling.
Change IU.
NO Check, clean, or correct the con-
tact.
NO Reconnect.
NO Change High Voltage Unit/1
(Image Transfer, Neutralizing).
→ Change MFP Control Board
→ Change LED Drive Board
→ Change LPH Unit.
Action