Lincoln Electric SVM159-A service manual Table F.3 Power Board Voltage Checks Check Point

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F-25 F-25

TROUBLESHOOTING & REPAIR

POWER BOARD TEST (CONTINUED)

TABLE F.3 – POWER BOARD VOLTAGE CHECKS

CHECK POINT	TEST	CONNECTOR		LEAD NO. OR	NORMAL
LOCATION	DESCRIPTION	PLUG PIN NO.		IDENTITY	ACCEPTABLE
					VOLTAGE
					READING
POWER BOARD	CHECK 40 VDC	2 (+)		477 (+)	38 – 42 VDC
CONNECTOR	INPUT FROM	1 (-)		475 (-)
PLUG J41	DC BUS BOARD	475	477
POWER BOARD	CHECK +15	1 (+)		412 (+)	+15 VDC
CONNECTOR	VDC SUPPLY FROM	5 (-)		410 (-)
PLUG J42	POWER BOARD	412
		410
POWER BOARD	CHECK +5 VDC	3 (+)		408 (+)	+5 VDC
CONNECTOR	SUPPLY FROM	5 (-)	408	410 (-)
PLUG J42	POWER BOARD
		410
POWER BOARD	CHECK -15 VDC	2 (+)		411 (+)	-15 VDC
CONNECTOR	SUPPLY FROM	5 (-)		410 (-)
PLUG J42	POWER BOARD	411
		410
POWER BOARD	CHECK +5 VDC	5 (+)		1104 (+)	+5 VDC
CONNECTOR	ARCLINK SUPPLY	10 (-)	1104	1103 (-)
PLUG J43	FROM POWER BOARD
			1103
POWER BOARD	CHECK +5 VDC	4 (+)		406 (+)	+5 VDC
CONNECTOR	“RS-232” SUPPLY	9 (-)	406	405 (-)
PLUG J43	FROM POWER BOARD
		405
		3 (+)
POWER BOARD	CHECK +5 VDC	403 12 (-)		403 (+)	+5 VDC
CONNECTOR	SPI SUPPLY FROM			401 (-)
PLUG J43	POWER BOARD		401

POWER WAVE 355/405