2-32 Phaser 7500 Printer Service Manual
Theory of Operation
Toner Dispenser Motor (PL5.1.7)
The Toner Dispenser Motor drives the Agitator in the Toner Cartridge and the
Auger in the Transport section to convey the toner from the Toner Cartridge to the
Developer Housing Assembly. One is allocated to each color - Yellow, Magenta,
Cyan, and Black.
Developer Housing Assembly (PL5.2.2)
The Developer Housing Assembly uses toner and carrier to develop images on the
Drum. One is allocated to each color - Yellow, Magenta, Cyan, and Black.
The Developer Housing Assembly is made up of the following main components.
• Magnet Roll - Contacts the Drum and forms toner images on the Drum.
• Auger - Agitates toner.
• Trimmer - Evens out the layer of toner and carrier on the Magnet Roll.
• ATC Sensor Assembly (PL5.2.4)
ATC Sensor Assembly (PL5.2.4)
The ATC Sensor Assembly detects the amount of toner and carrier in the Developer
(Developer Housing Assembly). It is part of the Developer Housing Assembly.
ATC PWB (PL5.2.18)
The ATC PWB acts as a relay between the MCU PWB and each ATC Sensor.
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