B. Lifter Operation1. OperationWhen the deck is slid into the pedestal, the deck open/closed sensor (PS38/PS40)turns on and, at the same time, the pick-up roller moves down and the light-blockingplate moves away from the deck lifter position sensor (PS31/PS34). This condition turnson the lifter drive motor (M18/M19), and lets the drive of the pick-up motor (M2) to thetake-up shaft; the lifter then starts to move up.The lifter stops where the deck lifter position sensor (PS31/PS34) can check the topsurface of the copy paper.The deck lifter limit sensor (PS37/PS39) is provided in consideration of such casesas when the lifter fails to stop moving up after the sensor arm has blocked the deck lifterposition sensor (PS31/PS34).Upon reaching the limit, the lifter is held up by the work of a gear.When the deck is detached from the copier, the cable take-up gear disengages fromthe gear, and the lifter starts to move down on its own weight.Figure 5-304M2Lifter limitsensor(PS37/PS39)Lifter positionsensor(PS31/PS34) Paper detectingleverPick-up rollerLifterOil damperSeparation rollerFeeding rollersPick-up rollerLifter limiterdetecting leverCopy paperPick-up motorDeck open/closed sensor(PS38/PS40)M18/M19Deck lifter drivemotorPaper sensor(PS32/PS35)COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 5 PICK-UP/FEEDING SYSTEM5-16
