3–79OPERATIONS AND TIMINGCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)3. Lifter Operationa. OperationWhen the deck is slid inside the pedestal, thepick-up roller lowers and the light-blocking plateleaves the deck lifter position sensor (PS3). Thecondition causes the lifter drive clutch (CL4) to turnon, and the drive of the pedestal motor (M1) istransmitted to the cable take-up shaft, therebyraising the lifter.The lifter keeps rising until the deck lifter positionsensor (PS3) detects the top sheet of the paperstack placed on the lifter.The deck lifter upper limit sensor (PS4) serves tostop the lifter in the event that the sensor arm shouldblock the deck lifter position sensor (PS3) for somereason.When the lifter has reached its upper limit, it ismaintained in position by the work of one-way gear.When the deck is removed from the pedestal, thetake-up gear disengages itself from the one-waygear, thereby allowing the lifter to lower in its ownweight.Lifter: Pick-up roller up, i.e., the light-blocking plate of the lifter detecting leverlowers to block the deck lifter position sensor (PS3)DeckSeparation rollerPick-uproller armPick-up roller shaftCopy paperDeck lifter position sensor(PS3)Lifter detectingleverPaper detectingspacerFeeding roller: Pick-up roller down, i.e., the light-blocking plate of the lifter detecting leverrises to leave the deck lifter position sensor (PS3)Figure 3-434
