Brother DCP-L2500D, Service Manual

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2-73
Confidential

White vertical streaks
 White horizontal streaks
 Faint print
<User Check>
- Clean the corona wire of the drum unit.
- Check that there is no dust on the toner cartridge.
- Refer to the User's Guide to remove the dirt from the exposure drum
using a cotton applicator.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step Cause Remedy
1
Dirt on the charge electrodes Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-8 and
Fig. 2-9 .)
2
Laser unit failure Replace the laser unit.
<User Check>
- This problem may disappear after printing multiple sheets of paper.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step Cause Remedy
1
Dirt on the charge electrodes Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-8 and
Fig. 2-9 .)
2
Scratch or dirt on the fuser unit Replace the fuser unit.
3
High-voltage power supply PCB
failure Replace the high-voltage power supply PCB
ASSY.
<User Check>
- Check that the machine is positioned on a level surface.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Step Cause Remedy
1
Laser unit failure Replace the laser unit.
2
Fuser unit failure Replace the fuser unit.
3
Main PCB failure Replace the main PCB ASSY.