Konica Minolta bizhub C250 Service Manual page 101

15. Toner collecting section
15.3.3 Waste toner near-full/full detection control
A. Waste toner detection mechanism
• To prevent false detection, an agitation screw is mounted in the waste toner box so that
the waste toner is accumulated in the bottle evenly.
• The waste toner full sensor (PC8) detects the area where the visor a mounted on the
shaft of the toner conveying screw overlaps with the visor B.
• As the amount of the waste toner increases, the load for the screw to rotate will increase.
The period of time the light shield Plate blocks the waste toner full sensor (PC8) will then
become shorter.
Waste toner box
Light shield plate A
Light shield plate B
Waste toner full sensor (PC8)
Light shield plate B
Light shield
plate A
4038T2C176AA
Waste toner full sensor (PC8)
68
Agitator screw
Torsion coil spring
4038T2C175AA
Waste toner empty
Theory of operation ver. 3.0 Aug. 2006
Waste toner full
4038T2C177AA
4038T2C174AA
4038T2C116AA
4038T2C178AA