Lincoln Electric 355M, 405M service manual Power Board Test

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F-25	TROUBLESHOOTING AND REPAIR					F-25
	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 (+)			38 – 42 VDC
CONNECTOR	INPUT FROM	475	1 (-)	477	477 (+)
PLUG J41	DC BUS BOARD
					475 (-)
POWER BOARD	CHECK +15		1 (+)			+15 VDC
CONNECTOR	VDC SUPPLY FROM	412	5 (-)		412 (+)
PLUG J42	POWER BOARD
			410		410 (-)
POWER BOARD	CHECK +5 VDC		3 (+)			+5 VDC
CONNECTOR	SUPPLY FROM		5 (-)	408	408 (+)
PLUG J42	POWER BOARD
					410 (-)
			410
POWER BOARD	CHECK -15 VDC	411	2 (+)			-15 VDC
CONNECTOR	SUPPLY FROM		5 (-)		411 (+)
PLUG J42	POWER BOARD
					410 (-)
		410
POWER BOARD	CHECK +5 VDC		5 (+)		1104 (+)	+5 VDC
CONNECTOR	ARCLINK SUPPLY		10 (-)	1104
PLUG J43	FROM POWER BOARD				1103 (-)
				1103
POWER BOARD	CHECK +5 VDC		4 (+)		406 (+)	+5 VDC
CONNECTOR	“RS-232” SUPPLY		9 (-)	406
PLUG J43	FROM POWER BOARD				405 (-)
		405
			3 (+)		403 (+)	+5 VDC
POWER BOARD	CHECK +5 VDC	403	12 (-)
CONNECTOR	SPI SUPPLY FROM				401 (-)
PLUG J43	POWER BOARD
				401

POWER WAVE 355M/405M