3-72 Service ManualA card that controls the ADF unit assembly. The ADF controller card assembly is connected to and controlledby the Scanner controller card assembly.Sensor (ADF sheet through)The ADF sensor (ADF sheet through) is installed immediately downstream from the Feed/pick roll assembly todetect completion of document feed.Sensor (ADF 1st scan)The ADF sensor (ADF 1st scan) is installed just upstream of the scanning surface and is used to for scanningtiming operations.Sensor (2nd scan)The ADF sensor (ADF 1st scan) is installed just down stream of the scanning surface and is used to forscanning timing operations.Sensor (ADF media exit)The sensor (ADF media exit) is used to detect when scanned media has exited the ADF.ADF feed motor assemblyThe feed motor assembly is a stepping motor that rotates the pick roll and feed roll in the reverse direction(CCW direction) and rotates the ADF transport roll assembly in the normal direction (CW direction).When this motor rotates in the reverse direction, the ADF transport roll assembly stops.ADF transport motorThe ADF transport motor is a stepping motor that rotates the ADF registration roll assembly, ADF feed-out rollassembly, and ADF exit roll assembly.ADF pick solenoid assembly
