Dirt On The Back Of Paper; Vertical Streaks; Black Vertical Streaks On A Light Background - Brother HL-1110 Service Manual

4.2.8 Dirt on the back of paper

Step
1 Dirt on paper feed system
2 Dirt on the fuser unit

4.2.9 Vertical streaks

Step
Attachment failure of the FG
1 harness or FG plate (not grounded
correctly)
2 Scratch or dirt on the heat unit
Note:
• If the machine prints the same pattern continuously, especially a pattern including
vertical streaks, black vertical streaks may appear on the paper because the
electrostatic performance of the exposure drum has lowered temporarily.

4.2.10 Black vertical streaks on a light background

Step
1 Dirt on paper feed system
2 Scratch or dirt on the heat unit
3 Foreign object in the laser unit
<User Check>
- This problem may disappear after printing multiple
sheets of paper.
- Replace the toner cartridge with a new one.
Cause
<User Check>
- Clean the inside of the machine and the corona wire of
the drum unit.
- Return the corona wire cleaning tab to the "
- 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>
- Clean the inside of the machine and the corona wire of the drum
unit.
- Replace the drum unit with a new one.
- Replace the toner cartridge with a new one.
Cause
1-23
Remedy
Wipe off the dirt.
Replace the fuser unit.
Remedy
Retighten the screws to secure the FG
harness or FG plate.
Replace the fuser unit.
Remedy
Wipe off the dirt.
Replace the fuser unit.
Replace the laser unit.
" position.
Confidential