Lincoln Electric SVM 122-A service manual Tifier Bridge Test

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

F-7		F-7
	TROUBLESHOOTING & REPAIR
	TROUBLESHOOTING GUIDE	Observe Safety Guidelines
		detailed in the beginning of this manual.

PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)	MISADJUSTMENT(S)	COURSE OF ACTION
	OUTPUT PROBLEMS
The machine has high welding out-	1. If remote control is being used,	1. Check the Output Control
put and no control.	set the Output Control switch	switch	(S2) and		associated
	(S2) in the OUTPUT CONTROL	wiring.
	“LOCAL” position and control	2. Check	feedback		leads #225
	the weld output with the
		(negative output terminal), #205
	machine Output Control poten-
		and #206		(output	shunt) for
	tiometer (R4). If the problem is
		loose	or	faulty connections.
	solved, check the remote con-
		See Wiring Diagram.
	trol unit (or wire feeder) and
	associated control cable.	3. Perform the SCR/Diode Rec-
		tifier Bridge Test.
		4. The 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, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

IDEALARC DC-400

LINCOLN ®

ELECTRIC