Lincoln Electric SVM161-A Table F.15 LED Function, Table F.16 Feedback Voltage Signals

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F-45 TROUBLESHOOTING AND REPAIR F-45

MAIN INVERTER BOARD

“WELDING LOGIC AND INVERTER” SECTION TEST (continued)

TABLE F.15 – LED FUNCTION

Machine/Mode Component Value Condition Note

ON/STICK		L8		-------		ON AND FLASHING POT SIGNAL
ON		L9		-------		OFF	THERMAL
ON		TP31-TP9		2.56 VDC		-------	ALWAYS
		TABLE F.16 – FEEDBACK VOLTAGE SIGNALS
	Machine/Mode		Component			Value	Condition
		ON/TIG	TP15-TP14		-2 VDC @ 100A		WELDING ON:
					-4 VDC @ 200A		CURRENT
							FEEDBACK
	ON/STICK		TP16-TP14			4.3 VDC	WELDING ON:
					OPEN CIRCUIT		VOLTAGE
						VOLTAGE	FEEDBACK
					CONDITION
		ON/TIG	TP19-TP14		2 VDC @ 100A		WELDING ON:
					4 VDC @ 200A		CURRENT
							REFERENCE
		TABLE F.17 – VOLTAGE CHECKS WITH 115 VAC APPLIED TO MACHINE
	Generator/Mode			Component		G[+],S[-]	D[+],S[-]
		ON/STICK		MF11		3.75 VDC	178 VDC
		ON/STICK		MF12		3.75 VDC	260 VDC
		ON/STICK		MF15		3.75 VDC	260 VDC
		ON/STICK		MF16		3.75 VDC	34 VDC

TABLE F.18 – LED (CHECK IN STICK MODE)

Generator/Mode	Component	Value
ON/STICK	L11	ON AND FLASHING
ON/STICK	L12	ON AND FLASHING
ON/STICK	L13	ON AND FLASHING
ON/STICK	L14	ON AND FLASHING

INVERTEC® V205-T AC/DC™