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Confidential
4.7.4 Drum error
4.7.5 Error message prompting drum replacement does not disappear
<User Check>
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one.
Step
Cause
Remedy
1
Dirt on the electrodes of the drum
unit and those of the machine
Clean the electrodes of the drum unit and
those of the machine. (Refer to
and
2
Dirt on the high-voltage power
supply PCB terminal
Clean the electrodes of the machine.
(Refer to
3
High-voltage power supply PCB
failure
Replace the high-voltage power supply PCB
ASSY.
4
Main PCB failure
Replace the main PCB ASSY.
<User Check>
- Reset the drum counter according to the manual.
Step
Cause
Remedy
1
Main PCB failure
Replace the main PCB ASSY.