Brother MFC6800 - Page 151

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