Brother HL-1200 Service Manual

1-20
Confidential
4.2.2 Faulty registration
4.2.3 Dark
<User Check>
- Check that the appropriate paper type is selected in the
driver.
Step Cause Remedy
1
Adjusted value of the laser unit is
incorrect.
Refer to “2.1 Entering Adjusted Value of
Laser Unit” in Chapter 3, and enter the
adjusted value of the laser unit again.
2
Paper printing position actuator
caught in sections of the machine
Reattach the paper printing position
actuator.
3 Laser unit failure Replace the laser unit.
<User Check>
- Check the usage environment of the machine. Using the machine in
hot-humid or cold-dry conditions can cause this problem.
- Clean the corona wire of the drum unit.
- If a new toner cartridge has been set, check that it was not replaced
with a used toner cartridge.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
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
High voltage power supply PCB
failure
Replace the high voltage power supply PCB
ASSY.
3 Laser unit failure Replace the laser unit.
4 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