Brother HL-L5000D Service Manual page 126

 Faulty registration
Step
Wrong adjusted value of laser unit
1 entered
Wrong adjusted value of TT entered Refer to
2
Registration rear actuator coming
3
off
4 Distortion at TT assembly
5 Laser unit failure
6 Main PCB failure
 Dark
Step
Dirt on the electrodes of the drum
1 unit and those of the machine
Dirt on the electrodes of the toner
2 cartridge and those of the machine
Dirt on the electrodes of the
3
machine
High-voltage power supply PCB
4
failure
5 Main PCB failure
6 Laser unit failure
<User Check>
- Check that the appropriate paper type is selected in the
driver.
- Install the latest main firmware.
Cause
<User Check>
- Check the usage environment of the machine. Using the machine in
hot-humid or cold-dry conditions can cause this problem.
- If a new toner cartridge has been detected, check that it was not
replaced with another toner cartridge.
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Cause
2-100
Remedy
Refer to "3.1 Entering Adjusted Value of
Laser Unit" in Chapter
adjusted value of the laser unit correctly.
"7.2 Adjusting Left-end and Upper-
end Print Position (Function Code: 45) (TT
only)" in Chapter 4 to adjust the writing
start position.
Reattach the registration rear actuator.
Reattach the TT.
Replace the laser unit.
Replace the main PCB ASSY.
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-7.)
Clean the electrodes of the toner cartridge
and those of the machine. (Refer to
and Fig. 2-7.)
Clean the electrodes of the machine.
(Refer to Fig. 2-7.)
Replace the high-voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Replace the laser unit.
4, and enter the
Fig. 2-6 and
Fig. 2-6
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