Brother DCP-L2500D, Service Manual

Page: 105 / 307

2-70
Confidential

All black
 Dirt on the paper
<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. 2-8 and
Fig. 2-9 .)
2
Dirt on the electrodes of the toner
cartridge and those of the machine Clean the electrodes of the toner cartridge
and those of the machine. (Refer to
Fig. 2-8
and Fig. 2-9 .)
3
Laser unit flat cable failure Replace the laser unit flat cable.
4
Dirt on the electrodes of the high-
voltage power supply PCB Clean the electrodes of the machine.
(Refer to
Fig. 2-9 .)
5
High-voltage power supply PCB
failure Replace the high-voltage power supply PCB
ASSY.
6
Laser unit failure Replace the laser unit.
7
Main PCB failure Replace the main PCB ASSY.
<User Check>
- This problem may disappear after printing multiple
sheets of paper.
- Replace the drum unit with a new one.
Step Cause Remedy
1
Dirt on the paper feed system Wipe off the dirt.
2
Dirt on the fuser unit Replace the fuser unit.
3
High-voltage power supply PCB
failure Replace the high-voltage power supply
PCB ASSY.