Lexmark C912 Service Manual - Page 221

5055-xxx Detection of fixed position The fixed position of the jogging bar is detected by the jogging home position sensor and a sensor flag united with the pinion. The fixed position is set when the sensor detects the sensor flag. This fixed position is used as a reference point to calculate the distance of the movement of the jogging bar and offset bar depending on paper size. Stapling mechanism The stapler motor rotation drives a gear link and cam mechanism. The cam movement allows the stapler mechanism to operate. Elevator sequence The wire drum rotates by the elevator motor as the wire drum rolls the wire pulling the hook plate up and down. The lower tray moves up by the driving force of the elevator motor until the elevator upper limit sensor is ON, the paper feeds onto the tray, or until the paper upper level sensor B is ON if no paper feeds onto the tray. When paper feeds out to the lower tray and the paper full sensor A turns ON, the lower tray moves down until the paper full sensor A Diagnostic aids 3-71