Drum Error; Drum Replacement Message Displayed On Lcd Is Not Cleared - Brother DCP-L8400CDN Service Manual

4.7.4

Drum error

< User Check >
- Clean the corona wire.
- Replace the drum unit with a new one.
Step
1
2
3
4
5
4.7.5

Drum replacement message displayed on LCD is not cleared

< User Check >
- Refer to "2.3 Counter Reset of Consumable Parts (Drum unit/Belt unit)" in Chapter
reset the drum counter.
Step
1
Cause
Dirt on the GRID terminals or
CHG terminals of the main
body and the drum unit
Dirt on the terminal of the
high-voltage power supply
PCB
High-voltage power supply
PCB failure
Toner sensor failure
Main PCB failure
Cause
Main PCB failure
Clean the GRID terminals and CHG
terminals of the main body and the drum unit.
Clean the terminal of the high-voltage power
supply PCB.
Replace the high-voltage power supply PCB
ASSY.
Replace the toner/new sensor PCB ASSY.
Replace the main PCB ASSY.
Replace the main PCB ASSY.
2-120
Remedy
5, and
Remedy
Confidential