Xerox Phaser 6115 MFP, Service Manual

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2-32 Phaser 6115MFP Multifunction Product Service Manual
Theory of Operation
4. The Cleaning Blade Position Sensor signal indicates whether or not the
Cleaning Blade is retracted from the Transfer Belt.
The position of the Cleaning Blade is unknown when the Power Switch is
turned On or the cover is opened and closed. To determine home position for
the Cleaning Blade, the system performs a home position detection sequence
during a warm-up cycle. The Cleaning Blade Solenoid is energized to start a
retraction sequence. When the Cleaning Blade Position Sensor is blocked,
indicating home position, the Cleaning Blade Solenoid is de energized.
Transfer Belt Position Sensor
Image development requires the creation of a composite image on the surface
of the Transfer Belt. The leading edge of each color component of the image
must register correctly on the Transfer Belt’s surface. The position of the
Transfer Belt is monitored by the Transfer Belt Position Sensor. The optical
sensor detects holes in the Transfer Belt.
Two detection holes are punched in the Transfer Belt. The image write start
position varies according to the media size. For A4 or smaller media, the
image write start position, as determined by the sensor, is detection hole A.
P r e ssur e Cam
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