COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)APPENDIXA-8ConnectorJ203J204J205J206J207J208J209PinA7A8A9B3B4B5B6B7B8B9B102456781356891357891561235123456AbbreviationTR2PWMTR1PWMLSYNC*FIXDCTR1DCRVTR1DCCLNDCRVCLNDCCLNACCORDCCORACIOTR*IOTT*TSEL4*TSEL3*TSEL2*TSEL1*PDLENB*BSAMPLEBSAMPLE*DBATADBATA*TMPSNSHUMSNS+24UHDNSDENREFLEDCNTFUSLD*DEVHPRLOCKSFXOUTSMPDFS*MPTWIDMDI1MDO1MSK1MSC1MPWROPCSNSNamesecondary transfer bias control signalprimary charging transfer bias control signalITD cleaning bias control signalfixing separation DC bias drive signalprimary transfer DC (positive) bias drive signalprimary transfer DC (negative) bias drive signalITD cleaning DC (positive) bias drive signalITD cleaning DC (negative) bias drive signalITD cleaning AC bias drive signalsecondary pre-transfer charging DC bias drive signalsecondary pre-transfer charging AC bias drive signalIOT status signalIOT command signalfor factory adjustmentfor factory adjustmentfor factor adjustmentfor factory adjustmentlaser emission main motor signalimage enable signalAPC sampling timing signal 1APC sampling timing signal 2PWM video data signal 1PWm video data signal 2machine internal temperature detection signalmachine internal humidity detection signaltoner density detection signalreceived light feedback signalLED emission setting signalface-up solenoid drive signaldeveloping rotary position detection signalcartridge releasing lever detection signalfixing delivery detection signalmultifeeder tray last paper detection signalmultifeeder ray paper width detection signalcartridge memory data input signalcartridge memory date output signalcartridge memory serial clock signalcartridge memory selection signalcartridge memory power supply signaldrum cartridge detection signalDownload free service manual at http://printer1.blogspot.com