Brother FAX 2800 - B/W Laser - Fax Service Manual page 130

Trouble
(9) White vertical streaks
(10) White horizontal stripes
(11) Dropout, white spots, or
hollow print
At the scanner
Check the following components:
- CIS unit
At the printer side
l Clean the laser beam window on the laser unit.
l Replace the toner cartridge.
l Replace the drum unit.
At the printer side
l Replace the drum unit.
At the printer side
l Check the connection of the high-voltage power flat cable on the
main PCB and high-voltage power supply PCB.
l Replace the toner cartridge.
l Gently wipe off the surface of the photo-sensitive drum with a
cotton swab.
l Replace the drum unit.
l Replace the high-voltage power supply PCB.
6 -2 4
Action to be taken