MINOLTA-QMS magicolor 6100 Series Service Manual page 77

Cleaning Brush
Residual
Toner
FCBV
magicolor 6100 Series Service Manual
4.2.3.9 Drum Cleaning
Drum cleaning is defined as a process to remove residual toner from the
surface of the transfer drum.
4.2.3.9.1
4.2.3.9.2
Cleaning Roller
Transfer Drum
Structure of Drum Cleaning
(see Fig. 4-23)
The drum cleaning unit is located as shown in Fig. 4-8.
A conductive cleaning brush rotates and cleans the surface of
the transfer drum.
The drum cleaning roller is positively biased by the positive
voltage FCBV. FCBV is injected into the cleaning brush as
well, and the cleaning brush is self-biased by the resistance of
the brush. The cleaning roller rotates in contact with the
brush.
Process of Drum Cleaning
(see Fig. 4-23)
Residual toner remains on the surface of the transfer drum
after the paper transfer process.
As the cleaning brush is biased to +FBBV, the brush attracts
and removes the residual toner from the surface of the trans-
fer drum while it is rotating.
As the cleaning roller is biased as +FCBV > +FBBV, the
residual toner attracted into the brush is attracted to the clean-
ing roller.
The residual toner attracted to the surface of the cleaning
roller is removed by the cleaning blade and moved to the
waste toner bottle by the waste toner auger.
Waste Toner Feeder
Drum Cleaning Unit
Fig. 4-23
FCBV: Cleaning Roller
Power Supply for cleaning
Roller Bias
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