Lexmark 5016-001 manual Fuser Error displays, If incorrect, go to the Printhead Service Check

5016-001

B 922 Fuser Error displays.

	FRU	Action
1	Interlock	Check the interlock switch actuator hardware for
	Switch	proper operation making sure of the following:
	Mechanism	•	Actuator 1 activates door switch S2.
		• There is +5 V dc to interlock switches S3 and S4.
		If the mechanism does not operate properly or
		activate any of the switches, repair as necessary.
2	Interlock	Switch S2 has two functions. Two terminals control
	Switch S2	+24 V dc to the engine board and four terminals
		control AC line voltage to the fuser lamps. Terminal
		A1, B1, A2 and B2 control AC line voltage to the
		fuser lamps. When this circuit opens, a 922 service
		error displays.
		CAUTION: Be careful when checking the voltages
		on switch S2, as AC line voltage may be present on
		terminals A1 (brown) B1 (yellow), A2 (brown) or B2
		(yellow).
		Check the voltage between terminals A1 (brown)
		and B1 (yellow). The voltage should read the same
		as the AC line voltage.
		Note: The lamp voltage varies as the fuser lamp
		turns on and off, or when power saver is selected.
		•	If incorrect, go to the “Printhead Service Check”
			on page 2-77.
		•	If correct, check, the voltage across terminals A2
			(brown) and B2 (yellow). The voltage should read
			the same as the AC line voltage.
			• If incorrect, check the switch for continuity and
			proper operation.
			• If correct, disconnect the power cord and check
			continuity between switch terminals A2 and B2.
			• If incorrect go to the “Fuser Cold Service
			Check” on page 2-51.

Diagnostic Information 2-47