Lexmark Forms Printer 2400 Service Manual - Page 40
Paper Present Sensor Service Check, Action, Unload, Load/Unload
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24xx Paper Present Sensor Service Check FRU 1 Paper Present Sensor 2 Logic Board Action With no paper in the printer, the tractor in the push position, and the paper select lever set to continuous forms, press Load/Unload; the gear train should turn forward to load paper. Activate the paper present sensor with a screwdriver and press Load/Unload again; the gear train should turn backward to park paper. Measure the voltage between CN5-2 (paper present signal) and CN5-3 (GND) on the 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. • Be sure the paper present sensor and its actuator are properly installed and not damaged. • If the problem remains, replace the paper present 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. • Be sure the ASF setting is off unless the ASF is installed. • If the paper present sensor is good and the ASF setting is on, replace the logic board and reset the "Bidirectional Print Adjustment" on page 4-4. 2-22 Service Manual
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