Lexmark 4026-0XX manual Diagnostic Information, Input Sensor

4026-0XX

	FRU	Action
3	Input Sensor	Check the flag for damage, especially at the
	Flag	front edge, Be sure the flag moves freely.
		Replace the flag as necessary.
4	Input Sensor	Be sure the input sensor is correctly installed
		and the sensor/solenoid cable is properly con-
		nected.
		Disconnect the input sensor cable from the CN3
		connector on the engine board. The voltage at
		CN3-1 measures between +4.5 V dc and +5.5 V
		dc. If incorrect, replace the engine board.
		If correct, reconnect the input sensor cable at
		CN3. Monitor the voltage at CN3-3 while moving
		the sensor flag in and out. The voltage changes
		from +2 V dc to 0 V dc. If incorrect, check the
		input sensor/solenoid cable continuity. If cable
		continuity is incorrect, replace the paper feed
		frame assembly. If cable continuity is correct,
		replace the following FRUs one at a time in the
		order shown:
		Input Sensor
		Engine Board

Diagnostic Information 2-21