Xerox Phaser 4500, Service Manual

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2-42 Phaser 4500 Service Manual
Gear Layout
Functional Components
The Paper Tray used in the optional feeder is identical to the 550-Sheet Paper Tray
used by the base engine, so the description of the Paper Tray is omitted here.
Option Paper Size Switch Assembly A bank of switches for setting the size of
paper supplied from each Paper Tray is mounted in the Left Tray Guide. A signal
indicating the paper size is transmitted as a voltage to the HVPS/Engine Logic Board.
No Paper Actuator
This actuator is kept in a raised position by the paper in the
tray. If the Paper Tray runs out of paper, the No Paper Actuator drops and the flag of
the No Paper Actuator moves from between the sensor arms, allowing the sensor to
turn on.
No Paper Sensor This is a photo sensor that remains in the OFF state when paper
is present in the tray. The sensor turns on when there is no paper in the tray and the
flag on the No Paper Actuator moves out of the sensor.
Low Paper Actuator
When paper is low in the Paper Tray, the arm of the Low
Paper Actuator is pushed up by the Bottom Plate Assembly, moving the actuator flag
out of the sensor.
Low Paper Sensor This photo sensor remains in an OFF state until the paper level
in the tray drops sufficiently to move the Low Paper Actuator flag out of the sensor.
1. Optional Feeder Gear 6 5. Feeder Motor
2. Turn Roller Clutch 6. Optional Feeder Gear 2
3. Feed Clutch 7. Optional Feeder Gear 3
4. Optional Feeder Gear 4 8. Optional Feeder Gear 5
s4500-035
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