Brother HL-1200 Service Manual

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Confidential
4.2.8 Dirt on the back of paper
4.2.9 Vertical streaks
4.2.10 Black vertical streaks on a light background
<User Check>
- This problem may disappear after printing multiple
sheets of paper.
- Replace the toner cartridge with a new one.
Step Cause Remedy
1 Dirt on paper feed system Wipe off the dirt.
2 Dirt on the fuser unit Replace the fuser unit.
<User Check>
- Clean the inside of the machine and the corona wire of
the drum unit.
- Return the corona wire cleaning tab to the “ ” position.
- 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
Attachment failure of the FG
harness or FG plate (not grounded
correctly)
Retighten the screws to secure the FG
harness or FG plate.
2 Scratch or dirt on the heat unit Replace the fuser 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.
<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.
Step Cause Remedy
1 Dirt on paper feed system Wipe off the dirt.
2 Scratch or dirt on the heat unit Replace the fuser unit.
3 Foreign object in the laser unit Replace the laser unit.

Brother HL-1200 Specifications

General

Print Technology	Laser
Interface	USB 2.0
Memory	1 MB
Weight	4.6 kg
Print Speed	20 ppm
Resolution	Up to 2400 x 600 dpi
Paper Input Capacity	150 sheets
Dimensions	340 mm x 238 mm x 189 mm
Supported Operating Systems	Windows, Mac OS