Lincoln Electric V300-PRO manual Next Test

					Next
			Test		Test
Step	Test	Check	Result	Conclusion	Step	Repair Action
4	Switch PC Board	Terminals on Switch	>1K ohms	OK	cont
	resistance test.	PC Board:
		1/8 (pos) to
				Short	5	Replace Switch PC Board
		12 (neg)	<100 ohms
	No dynamic test	1/8 (neg) to	<100 ohms	OK	cont
	is possible.	12 (pos)
			>1K ohms	Open	5	Replace Switch PC Board
	Remove leads	9 (pos) to	>1K ohms	OK	cont
	401/403, 1/8, 9,	4/5 (neg)
	12, 4/5 and		<100 ohms	Short	5	Replace Switch PC Board
	402/404.
		9 (neg) to	<100 ohms	OK	cont
		4/5 (pos)
			>1K ohms	Open	5	Replace Switch PC Board
		1/8 (pos) to	<100 ohms	OK	cont
		9 (neg)
			>1K ohms	Open	5	Replace Switch PC Board
		1/8 (neg) to	>1K ohms	OK	cont
		9 (pos)
			<100 ohms	Short	5	Replace Switch PC Board
		12 (pos) to	<100 ohms	OK	cont
		4/5 (neg)
			>1K ohms	Open	5	Replace Switch PC Board
		12 (neg) to	>1K ohms	OK	cont
		4/5 (pos)
			<100 ohms	Short	5	Replace Switch PC Board
		12 (pos) to	>1K ohms	OK	cont
		401/403 (neg)
			<100 ohms	Short	5	Replace Switch PC Board
		12 (neg) to	<100 ohms	OK	cont
		401/403 (pos)
			>1K ohms	Open	5	Replace Switch PC Board
		9 (pos) to	<100 ohms	OK	cont
		402/404 (neg)
			>1K ohms	Open	5	Replace Switch PC Board
		9 (neg) to	>1K ohms	OK	cont
		402/404 (pos)
			<100 ohms	Short	5	Replace Switch PC Board

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con- tact your local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

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