White Horizontal Streaks; Faint Print - Brother HL-1110 Service Manual

4.2.13 White horizontal streaks

Step
Dirt on electrodes of the drum unit
1 and those of the machine
Dirt on electrodes of the toner
2 cartridge and those of the machine
High voltage power supply PCB
3
failure

4.2.14 Faint print

Step
1 Fuser unit failure
2 Laser unit failure
3 Main PCB failure
<User Check>
- This problem may disappear after printing multiple sheets of paper.
When the machine has not been used for long periods of time, try
printing several 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 toner cartridge with a new one.
- Replace the drum unit with a new one.
Cause
1-25
Remedy
Clean the electrodes of the drum unit and
those of the machine. (Refer to
Fig. 1-7.)
Clean the electrodes of the toner cartridge
and those of the machine. (Refer to
or Fig. 1-7.)
Replace the high voltage power supply PCB
ASSY.
Remedy
Replace the fuser unit.
Replace the laser unit.
Replace the main PCB ASSY.
Fig. 1-6 or
Fig. 1-6
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