Konica Minolta bizhub 211, Service Manual

Page: 71 / 182

15. Toner recovery Theory of Operation Ver. 1.0 Apr. 2007
40
bizhub 163/21
1/220
Composition/Operation
15.3 Operation
• The Cleaning Blade is used to scrape residual toner off the surface of the PC Drum.
• The spent toner is conveyed through the Recycling Duct and eventually back to the
Developer Mixing Chamber.
• The following control is provided to prevent paper dust from being wedged between the
Cleaning Blade and the PC Drum. When the cumulative period of time through which the
PC Drum has been driven reaches a predetermined value, the PC Drum is turned back-
ward (by turning the Main Motor backward). Shoulder gears comprising two different
parts are provided on the copier. This ensures that the drive is transmitted only to the
Imaging Unit, but not any other parts, during backward rotation.
Cumulative Time Through Which PC Drum Has Been Driven PC Drum Backward Rotation Time
Approx. 330 sec. 50 ms
A08EC532AA
Cleaning Blade
Spent Toner Recycling Coil
PC Drum
Spent Toner Conveying Screw 2
Spent Toner Conveying Screw 1
Spent Toner Recycling Duct
Developer Mixing Chamber