Completely Blank; Image Distortion - Brother DCP-1510 Service Manual

4.4.5 Completely blank

Step
Dirt on electrodes of the drum unit
1 and those of the machine, and dirt
on ground wire.
2 Laser unit attachment failure
Connection failure of the laser unit
3
flat cable
Connection failure of the high
4
voltage PCB flat cable
Disconnection of the laser unit flat
5
cable
6 Laser unit failure
High voltage power supply PCB
7
failure
8 Main PCB failure

4.4.6 Image distortion

Step
Laser unit attachment failure
1
Dirt on high-voltage electrodes and
2
electrodes of the machine
Laser unit FG plate attachment
3
failure (not grounded correctly)
4 Laser unit failure
5 Main PCB failure
<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.
Cause
Cause
1-50
Remedy
Clean the electrodes of the drum unit and
those of the machine, and the grounding
wire. (Refer to Fig. 1-7
Reattach the laser unit.
Reconnect the laser unit flat cable.
Reconnect the high voltage PCB flat cable.
Replace the laser unit flat cable.
Replace the laser unit.
Replace the high voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Remedy
Reattach the laser unit, and firmly tighten
the screws.
Clean the high-voltage electrodes and
electrodes of the machine.
Retighten the screws to secure the laser unit
FG plate.
Replace the laser unit.
Replace the main PCB ASSY.
or Fig. 1-8.)
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