Printer Section: Blank Copy - Konica Minolta Bizhub 162 Service Manual

17. Image quality problem
17.2.12

Printer Section: Blank copy

A. Typical Faulty Images
B. Troubleshooting Procedure
Step
1 Imaging Unit is installed correctly.
2 Connector between the Imaging Unit and copier is dirty.
PH Shutter (located along the laser path between the PH
3 Unit and PC Drum) is not in correct position or malfunc-
tions.
4 Connectors PJ12A and PJ13A in PH unit come off or lift.
5 Image Transfer Roller Assy is installed correctly.
6 Image transfer current contact is dirty, broken, or bent.
7 Developing bias contact is dirty, broken, or bent.
8 High Voltage Unit (HV1) connectors is loose.
The following voltage is supplied from the Master Board
(PWB-A).
<Check procedure>
9
Check that there is 24 V developing across the Master
Board pin and GND when the Power Switch is turned ON
(during a copy cycle or a standby state).
166
Check
Field Service Ver. 1.0 Apr. 2005
4011T035AA
Result
NO • Reinstall.
YES • Clean.
YES • Correct or reinstall.
YES • Reconnect.
NO • Reinstall.
• Clean, correct, or
YES
change.
• Clean, correct, or
YES
change.
YES • Reconnect.
• Change IU.
• Change PH Unit.
YES
• Change High Voltage
Unit (HV1).
• Change Master Board
NO
(PWB-A).
Action