Image Distortion - Brother HL-2290 Service Manual

 Completely blank
<User Check>
Step
Connection failure of the laser
1
unit flat cable
2 Laser unit attachment failure
3 Laser unit flat cable failure
Dirt on the electrodes of the
high-voltage power supply
4
PCB and those of the
machine
5 Laser unit failure
6 Main PCB failure
 Image distortion
Step
1 Laser unit attachment failure
2 Laser unit failure
3 Main PCB failure
• Replace the drum unit with a new one.
• Replace the toner cartridge with a new one.
• Install the latest main firmware.
Cause
Cause
2-67
Remedy
Reconnect the laser unit flat cable.
Reattach the laser unit.
Replace the laser unit flat cable.
Clean the electrodes of the high-voltage
power supply PCB and those of the machine.
Replace the laser unit.
Replace the main PCB ASSY.
Remedy
Reattach the laser unit.
Replace the laser unit.
Replace the main PCB ASSY.
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