A–3COPYRIGHT © 1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)PWSW POWER SWITCH commandRDOP RIGHT DOOR OPEN signalRGCLD REGISTRATION CLUTCH DRIVE commandRGHP DUPLEXING UNIT REGISTRATION ROLLER HOME POSITION DETECTION signalRPD REGISTRATION PAPER DETECTION signalSCA/A* SCANNER MOTOR PULSE command A/A*SCB/B* SCANNER MOTOR PULSE command B/B*SCHP SCANNER HOME POSITION DETECTION signalSELECT CASSETTE4/5 SELECT signalSIZE1 ORIGINAL SIZE1 DETECTION signalSIZE2 ORIGINAL SIZE2 DETECTION signalSIZE3 ORIGINAL SIZE3 DETECTION signalSIZE4 ORIGINAL SIZE4 DETECTION signalSL6D DUPLEXING UNIT CHANGE SOLENOID DRIVE signalSL7D DUPLEXING UNIT FLAPPER SOLENOID DRIVE signalSL8D PAPER DEFLECTING PLATE SOLENOID DRIVE signalSPD SEPARATION DETECTION signalSRSW SERVICE MODE SWITCH signalTCNTD TOTAL COUNTER DRIVE commandTEP TONER EMPTY signalTFWON TRANSFER BIAS ON/OFF commandTFWPWN TRANSFER BIAS LOW VOLTAGE signalTFWS TRANSFER BIAS PULSE commandTH1 FIXING HEATER TEMPERATURE DETECTION signalTH2 FIXING HEATER END TEMPERATURE DETECTION signalTREVON TRANSFER REVERSE ON commandTRSLD TRANSFER CHARGING ROLLER RELEASING signalVP1P VERTICAL PATH1 PAPER DETECTION signalVP2P VERTICAL PATH2 PAPER DETECTION signal3. AbbreviationsAER AE ROTATIONINTR INITIAL ROTATIONLSTR LAST ROTATIONSCFW SCANNER FORWARDSCRV SCANNER REVERSESTBY STANDBYDownload service manual and resetter printer at http://printer1.blogspot.com