COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)B. Reversing OperationWhen the duplexing command arrives from the DC controller PCB, the duplexing dri-ver PCB turns on the duplexing flapper solenoid (SL6), operating the duplexing flapperso that paper will be moved to the duplexing unit.When the leading edge of paper is detected by the reversal sensor (PS26), theduplexing driver PCB rotates the duplexing motor (M8) counterclockwise (CCW; Note) tomove the paper to the machine’s reversing assembly.Then, a specific period of time after the reversal paper sensor (PS26) has detectedthe trailing edge of the paper, the duplexing driver PCB switches the rotation of theduplexing motor (M8) to clockwise direction to switch the paper path so that paper will bemoved along the duplexing lower guide to the feeding roller side of the duplexing unit.Figure 5-403CHAPTER 5 PICK-UP/FEEDING SYSTEM5-25Note:If paper is not 11x17, A3, B4, or LGL, the duplexing driver PCB first drives the duplex-ing motor (M8) and then will switch its rotation to high speed to move the paper to thereversing assembly.Reversing roller (CCW)Duplexing lower guideDuplexing upper guidePS26PS26ReversingassemblyDuplexing unitDuplexing feeding roller 1ReversingrollerreleasingplateReversingrollerreleasingplateRearassemblyReversing roller (CW)Duplexing upper guideDuplexing lower guideDuplexing unitDuplexing feeding roller 1M8M8 Duplexing motorDuplexing motorDownload free service manual at http://printer1.blogspot.com
