Drum Error; Drum Unit Cannot Be Detected; Replace Drum Unit (Replaced The Drum Unit With A New One But Still Seeing Led Display Prompting Toner Cartridge Replacement) - Brother HL-1110 Service Manual

4.4.4 Drum error

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

4.4.5 Drum unit cannot be detected.

<User Check>
- Set the drum unit correctly.
Step
Dirt on electrodes of the drum unit
1 and those of the machine
Connection failure of the high
2
voltage PCB harness
High voltage power supply PCB
3
failure
4 Main PCB failure
4.4.6 Replace drum unit (replaced the drum unit with a new one but still seeing LED
display prompting toner cartridge replacement)
<User Check>
- Replace the drum unit with a new one, and reset the drum counter.
Step
1 Main PCB failure
Cause
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig.
Reconnect the high voltage PCB harness.
Replace the high voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Cause
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig.
Reconnect the high voltage PCB harness.
Replace the high voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Cause
Replace the main PCB ASSY.
1-31
Remedy
1-7.)
Remedy
1-7.)
Remedy
Fig. 1-6 or
Fig. 1-6 or
Confidential