Faulty Registration; Dark - Brother HL-1110 Service Manual

4.2.2 Faulty registration

Step
Adjusted value of the laser unit is
1 incorrect.
Paper printing position actuator
2
caught in sections of the machine
3 Laser unit failure

4.2.3 Dark

Step
Dirt on electrodes of the drum unit
1 and those of the machine
High voltage power supply PCB
2
failure
3 Laser unit failure
4 Main PCB failure
<User Check>
- Check that the appropriate paper type is selected in the
driver.
Cause
<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.
Cause
1-20
Remedy
Refer to "2.1 Entering Adjusted Value of
Laser Unit" in Chapter
adjusted value of the laser unit again.
Reattach the paper printing position
actuator.
Replace the laser unit.
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 1-7.)
Replace the high voltage power supply PCB
ASSY.
Replace the laser unit.
Replace the main PCB ASSY.
3, and enter the
Fig. 1-6 or
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