Lexmark 2380 Service Manual - Page 50

Paper Empty Sensor Service Check Note: 23XX-001 machines have a single paper sensor that serves as a paper empty sensor and also determines the top of form setting. 23XX-002 and 23XX-003 machines have two sensors: • The left sensor is paper empty. • The right sensor is Top of Form. FRU Action 1 Paper Empty Sensor With no paper in the printer, the tractor in the push position, and the paper select lever set to continuous forms, press Alt+Park/Load; the gear train should turn forward (to try to load paper). Activate the paper empty sensor with a screwdriver and press Alt+Park/Load again; the gear train should turn backward (to try to park paper). Measure the voltage between CN7-2 (paper empty signal) and CN7-3 (GND) on the main logic board. There should be 0 V dc when there is paper in the printer, and +5 V dc when there is no paper in the printer. 2 Main Logic Board Make sure the sensor and its actuator are properly installed and undamaged. Correct the problem or replace the sensor. If the ASF is being used, it is normal for the Paper Out LED not to blink when there is no paper in the printer. Do the following: • Enter the Setup Menu. • Make sure the ASF setting is off unless the ASF is installed. • If the sensor and the ASF setting are OK, replace the main logic board. • Reset the "Bidirectional Print Adjustment" on page 4-5. 2-26