Field Service Ver. 2.0 Jun. 2010 16. IMAGE QUALITY PROBLEM
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bizhub 164
TROUBLESHOOTING
16.2.12 Printer section: Blank copy
A. Typical faulty images
B. Troubleshooting procedure
A09AF3C522DA
Step Check Result Action
1Imaging unit is installed correctly. NO•Reinstall.
2Connector between the imaging unit and copier is dirty. YES•Clean.
3PH shutter (located along the laser path between the PH
unit and drum) is not in correct position or malfunctions.
YES • Correct or reinstall.
4Connectors CN1PRCB and CN2PRCB in PH unit come off
or lift.
YES • Reconnect.
5Transfer roller unit is installed correctly. NO•Reinstall.
6Transfer current contact is dirty, broken, or bent. YES • Clean, correct, or
change.
7Developing bias contact is dirty, broken, or bent. YES•Clean, correct, or
change.
8High voltage unit (HV1) connectors is loose. YES • Reconnect.
9The following voltage is supplied from the printer control
board (PRCB).
<Check procedure>
Check that there is 24 V developing across the printer con-
trol board pin and GND when the power switch is turned
ON (during a copy cycle or a standby state).
YES • Change IU.
•Change PH unit.
•Change high voltage
unit (HV1).
NO • Change printer control
board (PRCB).
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