3–65OPERATIONS AND TIMINGCOPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)a. Set-Back Operations1. The first copy moves from the delivery assembly to the duplexing unit.Figure 3-4122. The leading edge of the copy paper butts against the set-back roller 1 and forms an arch.Figure 3-413Figure 3-414Duplexiniet detect roller Set-back roller 1Duplex exitdetect sensor (PS14)Lower feederassembly outletrollerSet-back roller 1Set-back rollersDownload service manual and resetter printer at http://printer1.blogspot.com