Phaser 6000/6010 and WC 6015 MFP Xerox Internal Use Only 2-9
Theory of Operation
Development
In the developer section, incoming toner is mixed with the existing developer
(toner/carrier mixture) by the auger, and then supplied to the magnet roller
located near the drum surface. The toner and carrier are charged by friction due to
agitation (toner in negative, carrier in positive), and they attract each other
electrically. The carrier, due to its magnetic properties, is attracted to the magnet
roller, and then uniformly leveled by the trimmer rod.
The magnet roller is covered by a thin semi-conductive sleeve all over the surface.
The DB (Developing Bias) voltage is supplied to this semiconductor sleeve from the
HVPS. The DB voltage is negative DC voltage combined with AC voltage. The DC
voltage keeps the magnet roller at a constant negative voltage against the
photoreceptor layer of the drum. Therefore, at the area where the negative electric
charge on the drum surface does not decrease, the potential is lower than that of
the magnet roller, while the potential is higher than that of the magnet roller at
the area where the negative charge on the drum surface decreases. The AC
voltage shakes the developer on the surface of the magnet roller so that the toner
easily flies to the drum.
HVPS
s6000-059
: Negative Electric Charge
: Positive Electric Charge
: Toner
: Carrier
Trimmer Rod
Toner Cartridge
Auger
Magnet Roller
Auger Auger
Drum
Xerographic Developer Assembly
Drum Surface
Toner Image
Electric Potential
On Drum
Developing
Bias
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