Brother HL-5590DN

2-102
Confidential
 Image distortion
 All black
Step Cause Remedy
1 Laser unit attachment failure Reattach the laser unit.
2 Laser unit failure Replace the laser unit.
3 Main PCB failure Replace the main PCB ASSY.
<User Check>
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one.
Step Cause Remedy
1
Dirt on the 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. 2-6 and
Fig. 2-7.)
2 Laser unit flat cable failure Replace the laser unit flat cable.
3
Dirt on the electrodes of the
machine
Clean the electrodes of the machine.
(Refer to Fig. 2-7.)
4
High-voltage power supply PCB
failure
Replace the high-voltage power supply PCB
ASSY.
5 Laser unit failure Replace the laser unit.
6 Main PCB failure Replace the main PCB ASSY.