Deck Lifter; Lifter Movement - Canon CLC 1120 Service Manual

D. Deck Lifter

1. Lifter Movement

The lifter of the deck is connected to a reel by means of a cable, and is driven by the deck lifter
motor (M101). The lifter is moved up or down by changing the direction of motor rotation.
When the deck (compartment) is slid into the copier, the deck open detecting switch (SW101)
is pushed; thereafter, the lifter starts to move up when the deck open sensor (PS109) detects the
light-blocking plate. It will stop moving up when the deck lifter position sensor (PS104) detects the
top surface of copy paper.
If the lifter fails to stop moving up after the sensor lever blocks the lifter position sensor
because of some fault, the lifter upper limit sensor (PS103) will turn on to prevent damage to the
deck by excess upward movement.
On the other hand, the lifter starts to move down when the deck open switch (SW100) is
pushed, and continues to move down until the lifter moves past the sensor lever of the deck paper
level upper sensor (PS107; falling edge of the sensor output).
If copy paper is added in this condition, the paper will push down the lever of the deck paper
level upper sensor, causing the lifter to move farther down until the stack of copy paper moves past
the sensor lever.
Each time copy paper is supplied, the lifter repeatedly moves down until the deck lifter lower
limit detecting switch (SW102) is pushed (maximum paper supply position).
COPYRIGHT © 1999 CANON INC. CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 PAPER DECK
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