2-53Functions of Main ComponentsWhen the optional DUPLEX is installed to the left of the printer, duplex (double-sided) printing isavailable with the FIO laser printer.The following outlines the functions of the main components of the DUPLEX.SWITCH-I/L,CABThe SWITCH-I/L,CAB detects open/close of the COVER DUP.SENSOR-PHOTO INThe SENSOR-PHOTO IN detects whether paper is remaining in the Duplex.ROLLER DUP A3L (UPPER/LOWER) / ROLL ASSY DUPThe ROLLER DUP A3L (UPPER), ROLLER DUP A3L (LOWER) and ROLL ASSY DUP re-feed the paper printed on the front side, through the Duplex to the printer to print on the rearside.PWBA DUPLEXThe PWBA DUPLEX that contains a CPU controls paper feed in the Duplex upon receiving acommand from the PWBA MCU F and sensor/switch information.MOTOR ASSY DUPHEAT ROLLROLL ASSY-OCTROLL ASSY-OCTOPTION EXIT2OPTION DUPLEXMSIHSG ASSY-BTRROLLERDUP A3LROLLERPINCH DUP DRUMCK6N004A2TRAY 1TRAY 2ROLLER PINCH EXITROLL ASSY-INVRLR-PINCH EXITROLLERASSY-DUPROLLERASSY-FEEDROLLERASSY-PINCHROLLASSY-DRIVEROLLER-TA PINCHROLLER ASSY-TAROLLER ASSYROLLER ASSYROLLERDUP A3LPRESSURE ROLLROLL ASSY-REGIROLLER ASSYROLL ASSY-REGI-P
