Lincoln Electric V250-S service manual Output Diodes Test, Figure F.4 Machine Output Terminals

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F-24 TROUBLESHOOTING & REPAIR F-24

OUTPUT DIODES TEST (continued)

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TEST PROCEDURE

1.Remove main input power to the V250-S.

2.Locate the output terminals on the front panel of the machine. See Figure F.4.

3.Remove any output cables and load from the output terminals.

4.Using the analog ohmmeter test for more than 200 ohms resistance between positive and negative out- put terminals. Positive test lead to the positive terminal; Negative test lead to the negative terminal. See Figure F.5.

NOTE: THE POLARITY OF THE TEST LEADS IS MOST IMPORTANT. IF THE TEST LEADS POLARITY IS NOT CORRECT THE TEST WILL HAVE ERRONEOUS RESULTS.

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SMAW	GTAW SMAW		THERMAL
SOFT		CRISP		HOT START

				5	6
				4	7
				3
					8
	A		120	2
		85
	OUTPUT			1	9
	50		170	0	10
	15		230	ARC FORCE
REMOTE	LOCAL	1		5	6
				4	7
				3
			250		8
				2
				1	9
				0	10
	INVERTEC ® V250-S

- + I S

O

NEGATIVE	POSITIVE
OUTPUT
	OUTPUT
TERMINAL
	TERMINAL

Figure F.4 Machine Output Terminals.

INVERTEC V250-S