Lexmark 5016-001 manual Service Engine error

5016-001

C 991 Service - Engine error.

Note: This error displays when a problem exists with the coupling on and off sensors. The same error displays for either sensor.

	FRU	Action
1	Coupling On/Off	Turn the printer on and observe how long it takes
	Sensors	for the error to display. If the coupling On sensor is
	Engine Board	failing, the warm-up will be shorter than the
		coupling Off sensor.
	SN Cable	Check the sensors by manually positioning the
	Engine Board	coupling cam disk over the coupling on (upper)
		sensor while turning the printer on. If the disk
		moves out of coupling, and the error displays,
		there is a problem with the coupling On sensor. If
		you manually position the coupling cam disk over
		the coupling Off (lower) sensor, while turning the
		printer on and the disk moves out of the Off sensor
		and then moves back into the sensor, there is a
		problem with the Off sensor.
		Coupling On sensor
		Pin #		Signal	Voltage	Voltage
				Voltage	Cam Disk in	Cam Disk Out
		1		+5 V dc	+5 V dc	+5 V dc
		2		CUPON	+5 V dc	0 V dc
		3		DGND	0 V dc	0 V dc
		Coupling Off sensor
		Pin #		Signal	Voltage	Voltage
				Voltage	Cam Disk in	Cam Disk Out
		1		+5 V dc	+5 V dc	+5 V dc
		2		CUPOFF	+5 V dc	0 V dc
		3		DGND	0 V dc	0 V dc
		If a problem cannot be isolated with the sensors,
		check the SN cable.
		•	If incorrect, replace the cable.
		•	If correct, replace the engine board.
2	Coupling Cam	Check the coupling cam and associated parts for
		correct operation. If a problem is found, repair or
		replace the motor mounting stay A assembly.

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