Basic system configuration Scanner unit systems The five main systems in the scanner unit include the following: ADF document feed system • ADF output tray • ADF feeder • ADF input tray ADF document exposure system • scanning lamp • document flatbed document exposure system • optical path • scanning lamp • document • optical path • optical drive unit • detection unit (home position sensor) image processing system • ADF analog processor • ADF CCD (charge couple device) driver • flatbed analog processor • flatbed CCD driver scanner control system • scanner controller board (SCB) Scan mode The functions based on a scan mode include: ADF duplex mode:
controlled by the ADF document feed system, ADF document exposure system, flatbed document exposure system, and image processing system. ADF simplex mode: controlled by the ADF document feed system, flatbed document exposure system, and image processing system. Flatbed mode : controlled by the flatbed document exposure system and image processing system. C8523-90921 Basic system configuration 73