Deck Lifter; Lifter Operation - Canon NP6251 Service Manual

CHAPTER 8 PAPER DECK-A1
D. Deck Lifter

1. Lifter Operation

The lifter of the deck is connected to the reel by means of a cable, and is driven by
the deck lifter motor (M102). The lifter is moved up and down by switching the direction
of the rotation of the motor.
When the deck (compartment) is pushed into the copier, the deck OPEN switch
(SW102) is pushed, and the lifter moves up. Then, the lifter stops when the deck lifter
position sensor (Q110) detects the top surface of the copy paper stacked on the lifter.
In consideration of such faults as when the deck fails to stop moving up after the
sensor lever has blocked the deck lifter position sensor, a deck lifter upper limit sensor
(Q102) is provided to prevent damage to the deck.
The lifter starts to move down when the deck OPEN switch (SW100) is pressed, and
stops when it leaves the sensor lever of the deck paper supply position sensor (Q103),
i.e., the falling edge of the sensor signal.
When copy paper has been supplied in this position, the lever of the deck paper
supply position sensor is pushed, and the lifter moves farther down until the copy paper
moves away from the sensor lever.
At this time, the lifter repeats moving down until the deck lifter lower limit switch
(SW103) is pressed each time copy paper is supplied (maximum paper supply position).
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COPYRIGHT © 1997 CANON INC.
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CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)