Lincoln Electric SVM127-A service manual General Power Supply Checks

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-49

F-49

TROUBLESHOOTING & REPAIR

GENERAL POWER SUPPLY TESTS (continued)

GENERAL POWER SUPPLY CHECKS

CHECKPOINT	TEST	CONNECTOR	LEAD NO.	NORMAL
LOCATION	DESCRIPTION	PLUG PIN NO.		ACCEPTABLE
				VOLTAGE
				READING
CONTROL P.C.	CHECK	525
BOARD	+15VDC
CONNECTOR	SUPPLY FROM
PLUG	POWER		525(+)	13.5 - 15.5 VDC
	BOARD TO	510	510(-)
	CONTROL	10(+)
	BOARD	9(-)
CONTROL P.C.	CHECK - 10 VDC	500
BOARD	SUPPLY FROM
CONNECTOR	POWER		500(-)	9.2 - 10.8 VDC
PLUG	BOARD TO	510	510(+)
	CONTROL	14(-)
	BOARD	9(+)
VOLTAGE P.C.	CHECK	525
BOARD UPPER	+ 15 VDC
CONNECTOR	SUPPLY FROM
PLUG NEXT TO	POWER		525(+)	13.5 - 15.5 VDC
"F" AND “S”	BOARD TO	510	510(-)
PINS	VOLTAGE	4(+)
	BOARD	6(-)
VOLTAGE P.C.
BOARD UPPER
CONNECTOR			510(+)
PLUG NEXT TO		510
"F" AND "S"	CHECK - 10 VDC
		6(+)
PINS	SUPPLY FROM
	POWER	500		9.2 - 10.8 VDC
	BOARD TO
VOLTAGE P.C.	VOLTAGE
BOARD LOWER	BOARD
CONNECTOR			500(-)
PLUG NEXT TO		4(-)
PLASTIC
COVERED
RELAY

LN-9 Wire Feeder