Brother DCP-9045CDN Reference Manual page 58

6. Toner cleaning
(1) Toner remaining on the exposure drum which has not completely been transferred on to
the paper is pulled onto the cleaning roller with a lower potential and the drum is cleaned.
(2) After the above step, the potential of the roller is raised during printing, and such attracted
toner is returned to the drum again. The returned toner is attracted to the belt unit by
lowering the potential of the transfer roller.
(3) The toner attracted to the belt unit is collected by the belt cleaner below the unit, and
stored in the waste toner box.
Memo:
When the toner returns to the exposure drum from the cleaning roller, the develop roller is
separated from the drum to prevent color mixture.
(3)
Back up roller
Cleaning roller
Develop roller
Exposure drum
Drum drive cleaner
Belt cleaner
Fig. Ref2-32
Ref. 2-32
(1)
(2)
Paper
Belt
Cleaning shaft
Waste toner box
Cleaning roller
Paper
Belt
Develop roller
Exposure drum
Transfer roller
Belt
Confidential
Cleaning roller