Xerox Phaser 7500 Service Manual page 70

Theory of Operation
2-10
negative charge.) As more toner adheres to the Drum, the negative charge of
that section increases, causing the potential to drop and the attraction force
that pulls the toner to weaken.
Negative Charge
Positive Charge
Toner
Carrier
Magnet Roll
Drum
Trimmer
Drum Surface
Toner Image
HVPS
Developer Housing
Drum Surface Potential
-V
0
Phaser 7500 Printer Service Manual
Toner Cartridge
Agitator
Auger
Auger
Auger
s7500-409
Developer
Bias
s7500-345