Lexmark C912 Service Manual - Page 125

5055-xxx Paper is being picked up and carried to the registration roller (areas C, E, 240, 24x). FRU Action 1 Paper feed cassette Be sure the paper cassette has the size guides and the side locator locks are working properly. Replace parts as necessary. 2 • Paper feed roller Be sure the paper feed rollers are free of dirt (MPF) and not damaged. • Paper feed rolls MPF, tray 1, 2, 3, 4, 5 Be sure the fanning pad is free of dirt and • Carrying roller tray 1, not damaged. 2, 3, 4, 5 • Fanning pad (MPF) Replace parts as necessary. 3 Gears Be sure the paper feed gears are not damaged. 4 • Paper feed solenoid Be sure the paper feed solenoid activates • Paper feed clutch the paper feed clutch and the clutch • MPF clutch engages properly. • MPF frame assembly Check the failing paper feed solenoid for continuity. Also check connector CN24 (tray1) and CN16 (MPF) on the printer controller board and CN5 on the expansion feeder control card. 5 • Registration sensor • MPF sensor • Printer controller board Check for a fluctuation between 0 and +5 V on the printer controller board between the following pins, when actuating the sensor: • Registration sensor-CN11 (pins 1 and 2) • MPF sensor-(CN11 pins 4 and 5) If the voltage fluctuates as stated above, replace the printer controller board. If the voltage does not fluctuate, replace the sensor. Diagnostic information 2-75