B. Lifter Operations1. OperationsWhen the deck is pushed inside the pedestal, the deck open/closed sensor (PS38)turns ON and, at the same time, the pick-up roller lowers, causing the deck lifter positionsensor (PS31) to leave the light-blocking plate.This condition turns ON the lifter drive motor (M18), and the drive of the pick-upmotor (M2) is transmitted to the cable take-up shaft to move up the lifter.The lifter stops where the deck lifter position sensor (PS31) can detect the topsurface of the copy paper on the lifter.A deck lifter limit sensor (PS37) is located in consideration of such cases in whichthe ascent fails to stop even after the sensor arm has blocked the deck lifter positionsensor (PS31).After it has moved up, the lifter is held in place by the work of gears.When the deck is slid out from the copier, the cable take-up gear disengages itself,allowing the lifter to move down on its own weight.Figure 5-303Lifter limit sensor(PS37)Lifter position sensor(PS31)Paper sensor(PS32)Paper detecting leverPick-up rollerLifterOil damperSeparation rollerFeeding rollersPick-up rollerLifter limiterdetecting leverCopy paperPick-up motorDeck open/closed sensor(PS38)M2M18Deck lifter drive motorCOPYRIGHT © 1997 CANON INC. CANON NP6045 REV. 1 MAR. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 5 PICK-UP/FEEDING SYSTEM5-13
