Brother HL-L2300D Service Manual page 81

 White vertical streaks
Step
Dirty charge electrodes
1
Laser unit failure
2
 White horizontal streaks
Step
Dirty charge electrodes
1
Scratch or dirt on the fuser unit
2
High-voltage power supply PCB
3
failure
 Faint print
Step
Laser unit failure
1
Fuser unit failure
2
Main PCB failure
3
<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.
Cause
<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.
Cause
<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.
Cause
2-63
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-6.)
Replace the laser unit.
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 2-6.)
Replace the fuser unit.
Replace the high-voltage power supply PCB
ASSY.
Remedy
Replace the laser unit.
Replace the fuser unit.
Replace the main PCB ASSY.
Fig. 2-5 and
Fig. 2-5 and
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