Lincoln Electric V250-S service manual Table F.5. Control Board Voltage Test Points, 18VAC

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F-33 TROUBLESHOOTING & REPAIR F-33

CONTROL BOARD VOLTAGE TEST (continued)

TABLE F.5. Control Board Voltage Test Points.

		ACCEPTABLE
TEST DESCRIPTION	TEST POINTS	VOLTAGES	TEST CONDITIONS
The 18VAC from the auxil-	Red lead (1J1)	18VAC	The correct input voltage
iary transformer to the con-	to	Note: voltage will vary with	applied to the V250-S and
trol board.	Red lead (3J1)	input line voltage.	the input power switch (S1)
			in the ON position.
Remote trigger circuit test.	Lead #318 (4J5)	0 VDC.	When remote trigger circuit
(#2 and #4)	to		is “closed”.
	Lead #322 (1J5)
Remote trigger circuit test.	Lead #318 (4J5)	12VDC.	When remote trigger circuit
(#2 and #4)	to		is “open”.
	Lead #322 (1J5)
Shunt feedback milli-volt	White lead (2J4)+	100 mV.	Machine loaded to 120
check.	to		Amps
	Black lead (1J4)-
Check for 15VDC control	Lead #303 (7J3)+	15VDC.	The correct input voltage
board supply voltage.	to		applied to the V250-S and
	Lead #375 (1J3)-		the input power switch (S1)
			in the ON position.

INVERTEC V250-S