Xerox Phaser 6280, Service Manual

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2-30 Phaser 6280 Color Laser Printer Service Manual
Theory of Operation
Transfer Unit
The Transfer Unit consists of the Belt, ADC Sensor, ADC Solenoid, and ADC
Pad.
■
Belt
The Belt feeds the paper toward the direction of the Fuser.
■
ADC Sensor
The ADC Sensor detects the toner patches on the Belt and converts them
to voltage value. The voltage value is used to control density of toner.
■
ADC Solenoid
To activate the ADC Pad, turn On the ADC Solenoid for a fixed time
before the ADC Sensor starts reading the toner patches. When turned
On, the ADC Solenoid activates the ADC Pad, which cleans
contamination on the ADC Sensor surface.
s6280-077
Normal Position
Spring
ADC Solenoid
ADC Solenoid On
Position of ADC Sensor
(Window = Open)
ADC Pad
ADC Pad
Shutter
Position of ADC Sensor
ADC Sensor