COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)F. Duplexing UnitFigure 10-506Table 10-506CHAPTER 10 TROUBLESHOOTING10-78SL6SL7CL5 PS24PS23PS26PS25M8M7qNameClutchPhotointer-rupterSolenoidMotorNotation DescriptionCL5 Duplexing feeding clutchPS23 Duplexing feeding roller 1 home positionerPS24 Duplexing unit paper sensorPS25 Horizontal registration guide home positionsensorPS26 Reversal paper sensorSL6 Duplexing flapper solenoidSL7 Reversing roller releasing solenoidM7 Horizontal registration motorM8 Duplexing motorSymbolCLSLMNameDuplexing driver PCBDescriptionControls various loads in the duplexing unitand checks various items.Ref.qDownload free service manual at http://printer1.blogspot.com