COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)2. Inputs to and Outputs of the Duplexing Driver PCBAPPENDIXA-13ConnectorJ2001J2002J2003J2004J2005J2006J2007J2008J2009Pin345611123412345633631AbbreviationDUPIDS*DUPSTS*DUPCMDDUPCLK*DUPSLD*DUPCLD*SWBADSWBANDSWBBDSWBBNDHRGCOMAHRGCOMBHRGADHRGANDHRGBDHRGBNDHREGSSWBKS*DRPSDUPPS*PRRESLDNameduplexing unit detection signalduplexing unit status signalduplexing unit command signalstatus clock signalduplexing flapper solenoid drive signalduplexing feeding clutch drive signalduplexing motor control signalduplexing motor control signalduplexing motor control signalduplexing motor control signalhorizontal registration motor control signalhorizontal registration motor control signalhorizontal registration motor control signalhorizontal registration motor control signalhorizontal registration motor control signalhorizontal registration motor control signalhorizontal registration guide home position detectionsignalreversal paper detection signalduplexing feeding roller 1 home position detection sig-nalduplexing unit paper detection signalreversing roller releasing solenoid drive signalDownload free service manual at http://printer1.blogspot.com