Lexmark 5021-0XX manual Incorrect media service check

5021-0XX

Incorrect media service check

Step	Questions / actions	Yes	No
1	Turn printer off and remove	Go to step 2.	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
	DCN16?
2	Reconnect operator panel.	Go to step 3.	Go to step 6.
	Turn printer on. Touch
	negative lead of voltmeter
	to metal bracket that holds
	I/O board to obtain ground.
	Touch positive lead to
	DCN16 pin 10 to ensure 5
	VDC is being supplied to
	toner present sensor. Is 5
	VDC present?
3	Remove tray from printer.	Go to step 4.	Go to step 5.
	Remove paper from tray
	and insert 1 sheet of
	transparency. Insert paper
	tray into printer. Check
	voltage level on DCN16 pin
	11. Voltage should
	measure approximately 4.6
	VDC. Is voltage okay?
4	Remove tray from printer.	Replace I/O	Go to step 5.
	Remove transparency from	board. See “I/O
	tray and insert white paper.	board removal”
	Insert paper tray into	on page 4-70. If
	printer. Check voltage level
		problem
	on DCN16 pin 11. Voltage
		persists, replace
	should measure
		engine controller
	approximately 1.7 VDC. Is
		board. See
	voltage okay?
		“Engine
		controller
		board removal”
		on page 4-55.

2-78Service Manual