Image Distortion - Brother DCP-7080 Service Manual

 Completely blank
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
Connection failure of the laser unit
3
flat cable
Laser unit attachment failure
4
Laser unit flat cable failure
5
Dirt on the electrodes of the high-
6
voltage power supply PCB
Laser unit failure
7
Main PCB failure
8
 Image distortion
Step
Laser unit attachment failure
1
Laser unit failure
2
Main PCB failure
3
<User Check>
- Clean the corona wire of the drum unit.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
- Install the latest firmware.
Cause
Cause
2-69
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-9.)
Clean the electrodes of the toner cartridge
and those of the machine. (Refer to
and Fig. 2-9.)
Reconnect the laser unit flat cable.
Reattach the laser unit.
Replace the laser unit flat cable.
Clean the electrodes of the machine.
(Refer to Fig. 2-9.)
Replace the laser unit.
Replace the main PCB ASSY.
Remedy
Reattach the laser unit.
Replace the laser unit.
Replace the main PCB ASSY.
Fig. 2-8 and
Fig. 2-8
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