Lexmark 2380 Service Manual - Page 62

FRU 2 Carrier Shaft Carrier Unit Platen Assembly Printhead Nose Ribbon Guide Action Check and replace worn or damaged parts. Pull Tractor Sensor Service Check Note: The pull tractor sensor detects the tractor in the pull position and disables park/load and auto tear-off. A failed sensor may prevent park/load from functioning with the tractor in the push position. FRU 1 Pull Tractor Sensor Action With the tractor in the push position, press Alt+Park/Load several times while alternately holding down and releasing the left pull tractor actuator. The paper should park and load when the actuator is not held down, and should not park or load when the pull tractor actuator is held down. If the paper does not move correctly: • Disconnect CN4 from the main logic board. • There should be 0 ohms from CP4-1 to CP4-2 when the left pull tractor actuator is pressed, and infinite resistance when the actuator is not pressed. • Replace the sensor if necessary. If the sensor is good but the paper still does not move correctly: • Replace the main logic board. • Reset the Bidirectional Alignment, see "Bidirectional Print Adjustment" on page 4-5. 2-38