Lexmark 5021-0XX Toner empty sensor receiver-TTR service check, See Engine controller, Receiver

5021-0XX

917—Toner empty sensor (receiver-TTR) 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. Retest
	board removal” on		printer. If error
	page 4-70for steps to		clears, problem
	remove I/O board shield. Is		solved,
	cable properly connected		otherwise go to
	to I/O board connector		step 2.
	DCN15?
2	Turn printer off and replace	Problem solved.	Go to step 3.
	I/O board. See “I/O board
	removal” on page 4-70.
	Retest printer. Does error
	clear?
3	Check cable that connects	Go to step 4.	Replace cable.
	engine controller board		Retest printer. If
	connector I1CN to I/O		error clears,
	board connector DCN1 for		problem solved,
	continuity and pin shorts. Is		otherwise go to
	cable okay?		step 4.
4	Turn printer off and replace	Problem solved.	Turn printer off
	engine controller board.		and replace
	See “Engine controller		toner empty
	board removal” on		sensor (receiver-
	page 4-55. Retest printer.		TTR). See
	Does error clear?		“Toner sensor
			(receiver)
			removal” on
			page 4-64.

Diagnostic information 2-57