CHAPTER 3 EXPOSURE SYSTEMCOPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 3-3B. Basic Lens Drive System Operation (change of reproductionratio)Figure 3-202When the paper size is changed or when the copier is in the ZOOM mode, the lens first returnsto the home position before moving to the position that corresponds to the cassette size and thereproduction ratio.This operation is executed also when the ZOOM mode is switched to the DIRECT mode.copy startkey ONSTAND BY INITIAL ROTATIONAE ROTATION SCAN FORWARDScanner home positionsensor (Q5)Scanner motor (M2)Scanner movementLens solenoid (SL2)Lens movementLens home positionsensor (Q6)Mirror home positionsensor (Q4)Mirror movement: Forward : Reverse