Drum Error; Error Message Prompting Drum Replacement Does Not Disappear - Brother DCP-7080 Service Manual

4.7.4 Drum error

<User Check>
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one.
Step
Dirt on the electrodes of the drum
1 unit and those of the machine
Dirt on the high-voltage power
2
supply PCB terminal
High-voltage power supply PCB
3
failure
Main PCB failure
4

4.7.5 Error message prompting drum replacement does not disappear

<User Check>
- Reset the drum counter according to the manual.
Step
Main PCB failure
1
Cause
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig.
Clean the electrodes of the machine.
(Refer to
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
2-83
Remedy
2-9.)
Fig. 2-9.)
Remedy
Fig. 2-8 and
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