Lincoln Electric SVM151-A Analog Control Power Supply Board Test, See the Digital Meter Calibra

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F-8					F-8
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines		TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)	MISADJUSTMENT(S)	COURSE OF ACTION
	FUNCTION PROBLEMS
The meters do not light in either CV	1. In the CC mode, only the AMPS	1.	Check all the plug connections
or CC modes.	meter will light. In the CV mode,		to the Weld Control Board for
	only the VOLTS meter will light.		loose or faulty connections.
			See the Wiring Diagram.
		2.	Check the leads and connec-
			tions between the meters and
			the Weld Control Board. See
			the Wiring Diagram.
		3.	Perform the	Analog	Control
			Power Supply Board Test.
		4.	The meters may be faulty.
		5.	The Weld Control Board may be
			faulty. Replace.
One or both of the meter’s readings	1. Make sure the test or external	1.	Check shunt	feedback	leads
are not accurate.	meter is reliable and accurate.		R326, 327, R226, 227, plugs
			P21 and P6 for loose or faulty
			connections.	See the Wiring
			Diagram.
		2.	Check the integrity of lead 237
			at plug P12 on the Weld Control
			Board and also at plug P31 on
			the Peripheral Board.
		3.	See the Digital Meter Calibra-
			tion and Adjustment Test in
			the Maintenance section.
		4.	Perform the	Analog	Control
			Power Supply Board Test.
		5.	The Weld Control Board may be
			faulty. Replace.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-800-833-9353.

MULTI-WELD 350