Lexmark 5021-0XX manual Missing toner cartridge service check, Present sensor

			5021-0XX
Missing toner cartridge service check
Step	Questions / actions	Yes	No
1	Remove toner cartridge in	Replace toner	Go to step 2.
	question. Holding toner	cartridge.
	cartridge with developer
	roller away from you, check
	toner present sensor
	actuators located on left
	rear of toner cartridge. Are
	actuators damaged?
2	Insert toner cartridge and	Go to step 3.	Replace toner
	ensure toner present		present sensor.
	sensor flag moves forward.		See “Toner
	Remove toner cartridge.		present sensor
	Toner present sensor flag		removal” on
	should spring forward.		page 4-63.
	Does toner present sensor
	flag operate correctly?
3	Turn printer off and remove	Go to step 4.	Properly connect
	I/O board shield. See “I/O		cable.
	board removal” on
	page 4-70for steps to
	remove I/O board shield. Is
	cable properly connected
	to I/O board connector
	DCN2?
4	Reconnect operator panel.	Go to step 5.	Go to step 8.
	Turn printer on. Touch
	negative lead of voltmeter
	to metal bracket that holds
	I/O board to obtain ground.
	Touch positive lead to
	DCN2 pin 2 to ensure 5
	VDC is being supplied to
	toner present sensor. Is 5
	VDC present?
5	Check voltage level on	Go to step 6.	Go to step 7.
	DCN2 pin 1. Is 5 VDC
	present?

Diagnostic information 2-81