Black Band; Downward Fogging Of Solid Color; Horizontal Lines - Brother HL-1110 Service Manual

4.2.17 Black band

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
Scratch or dirt on the heat unit or,
3
dirt on the pressure roller
4 Main PCB failure

4.2.18 Downward fogging of solid color

Step
High voltage power supply PCB
1
failure
2 Main PCB failure

4.2.19 Horizontal lines

Step
1 Fuser unit failure
2 Laser unit 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 toner cartridge with a new one.
- Replace the drum unit with a new one.
Cause
<User Check>
- Replace the toner cartridge with a new one.
- Replace the drum unit with a new one.
Cause
<User Check>
- Replace the toner cartridge with a new one.
- Replace the drum unit with a new one.
Cause
1-27
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 fuser unit.
Replace the main PCB ASSY.
Remedy
Replace the high voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Remedy
Replace the fuser unit.
Replace the laser unit.
Fig. 1-6 or
Fig. 1-6
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