2. Detecting the Level of the Stack in the Deck (compartment)The drive of the deck lifter motor (M102) is received by a coupling, and is transmittedto the rack by means of a drive belt. The rack is equipped with a black belt which movesin conjunction with the movement of the rack within the indicator window in the deck frontcover.When copy paper starts to run out and the lifter moves up to pick-up position, thearea of the black belt inside the display window increases and the level of copy paper(white area) starts to decrease, indicating the remaining level of copy paper.Figure 8-107M102Black beltRackIndicatorwindowDeck liftermotorDeck front coverCouplingDrive beltLifter lowers, and paperlevel (white area)increases.COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 8 PAPER DECK-A18-10