Phaser 6180 Color Laser Printer Service Manual 2-7
Theory of Operation
Development
Toner is electrically attached to the invisible electrostatic latent image on the
drum surface to form the visible toner image on the Drum.
The toner in the Print Cartridge is agitated by the built-in Agitator and fed into
the Developer part. The Augers are driven by the Toner Motor and the
Developer Motor in the Main Drive. The toner to be consumed according to
the print count is calculated and fed into the Developer. This process is called
Toner Dispensation, which is controlled by two processes: Pixel Count
Dispense Control (PCDC) and Automatic Density Control (ADC).
The toner fed into the Developer and the carrier in the Developer are agitated
by the Auger, and supplied to the Magnet Roll arranged in the drum surface
area. The toner and carrier are charged by friction due to agitation (toner in
negative, carrier in positive), and they are absorbed electrically. A uniform
layer is formed by the Trimmer Bar as the carrier magnetic substance is
attracted to the Magnetic Roll.
Waste Toner Collecting Area
s6180-138
Negative Electric Charge
Positive Electric Charge
Toner
Carrier
Print Cartridge
Developer
Trimmer Bar
Magnet Roll
Agitator
Auger
HVPS
Drum
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