Brother FAX-2820 Service Manual page 222

NOTE: Clean the drum unit as follows.
(1) Remove the toner cartridge from the drum unit. Place the printing samples in front of the
drum unit, and find the exact position of the image defect.
(2) Turn the drum gear by hand while looking at the surface of the exposure drum.
(3) Wipe the surface of the exposure drum with a cotton swab until the dust or paper powder on
the surface comes off.
CAUTION: Do not wipe the surface of the exposure drum with something sharp.
(ball-point pen etc.)
Position of smudge
on the drum
75.3mm interval
Exposure drum
Exposure drum
9 - 4 1
Drum unit
Printing sample
Confidential