Brother HL-1200 Service Manual

1-31
Confidential
4.4.4 Drum error
4.4.5 Drum unit cannot be detected.
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>
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one, and reset the drum counter.
Step Cause Remedy
1
Dirt on electrodes of the drum unit
and those of the machine
Clean the electrodes of the drum unit and
those of the machine. (Refer to Fig. 1-6 or
Fig. 1-7.)
2
Connection failure of the high
voltage PCB harness
Reconnect the high voltage PCB harness.
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>
- Set the drum unit correctly.
Step Cause Remedy
1
Dirt on electrodes of the drum unit
and those of the machine
Clean the electrodes of the drum unit and
those of the machine. (Refer to Fig. 1-6 or
Fig. 1-7.)
2
Connection failure of the high
voltage PCB harness
Reconnect the high voltage PCB harness.
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>
- Replace the drum unit with a new one, and reset the drum counter.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.

Brother HL-1200 Specifications

General

Print Technology	Laser
Interface	USB 2.0
Memory	1 MB
Weight	4.6 kg
Print Speed	20 ppm
Resolution	Up to 2400 x 600 dpi
Paper Input Capacity	150 sheets
Dimensions	340 mm x 238 mm x 189 mm
Supported Operating Systems	Windows, Mac OS