Field Service Ver. 1.0 Apr. 2007
16. Image quality problem
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T
roubleshooting
16.2.12
Printer section: Blank copy
A. Typical faulty images
B. Troubleshooting procedure
A09AF3C522DA
Step
Check
Result
Action
1
Imaging unit is installed correctly.
NO
• Reinstall.
2
Connector between the imaging unit and copier is dirty.
YES
• Clean.
3
PH shutter (located along the laser path between the PH
unit and PC drum) is not in correct position or malfunc-
tions.
YES
• Correct or reinstall.
4
Connectors PJ12A and PJ13A in PH unit come off or lift.
YES
• Reconnect.
5
Image transfer roller assy is installed correctly.
NO
• Reinstall.
6
Image transfer current contact is dirty, broken, or bent.
YES
• Clean, correct, or
change.
7
Developing bias contact is dirty, broken, or bent.
YES
• Clean, correct, or
change.
8
High voltage unit (HV1) connectors is loose.
YES
• Reconnect.
9
The 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).
Содержание bizhub 163
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