Lincoln Electric SVM179-B service manual Wiring Diagram LN-25 PRO

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G-2	ElECTriCal DiaGrams	G-2
WiriNG DiaGram - lN-25 prO - CODEs 11387, 11388 (G5681)

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ANALOG DISPLAY CASE FRONT

WIRING DIAGRAM LN-25 PRO

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WIRE FEED SPEED	YELLOW	1W	1B
	THERMAL
CONTROL RHEOSTAT	LED
10K2W	N.A.
R1

POLARITY 2W 2B LED

N.A.

TRIGGER	S1		S2	509D
	509D
INTERLOCK /	509E	CC / CV		509C
2 STEP	587A			523A
N.B., N.F.		N.B.
			SHOWN IN CV
SHOWN IN 2 STEP

S4

GAS PURGE PUSHBUTTON SWITCH

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ARC

VOLTMETER

VM +

721 667B

577A 576A 575A

TRIGGER

CONNECTOR

A 622A

P14 B 500A

C

D

E21A

BRIDGE

RECTIFIER

CONNECTS TO

J7 ON HARNESS

7211

500A 2

3

622A 4

5

575A 6

576A 7

577A 8

9 P7

10

			P16
N.B.	S3	509C	1		509
COLD		587A	2		587
	509E	523A	3		523
FEED	530A	530A	4		530
	N.O.			1	601
				2	509B
			P60	3
		FEED		4	4B
		PLATE		5	605

612 N.O. 610

N.B.

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TO WORK CLIP	21B	AC	+		667A
					667B
		-		AC D1
	N.D.		621A		67B

1112

1B 13

1W 14

2B 15

2W 16

CONNECTS TO J17

ON HARNESS 67B 1

2

667A 3

P17

		6	606
	TACH	7	608
		8	607
MOTOR /	R
GEARBOX	U		CONNECTS
	B		TO TIMER
			KIT

W B

P9

												FLEX
509A												CONNECTS TO J8
	530		523		509A		707				2W	ON PRESET P.C. BD.
509									500			3B
509B	612	587		708		610		622		1W

								CONTROL P.C. BOARD	1	2	3	4	5	6	7	8	9 10
1	2	3	4	5	6	7	8	9 10 11 12 13 14 15 16
							J6						J1

1

2

3 4

J2 5

6

7

8

9 10

601

606

608

605

EXTRA TORQUE

GAS

SOLENOID

690

N.E.

691

21A 4

5

621A 6

		1				1
	R	2	531	L4
		3				2
CONNECTS TO	U	4	537		J4	3
	B	5	534			4

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DIGITAL DISPLAY CASE FRONT

	J12								J8			PRESET P.C. BOARD								J10
1 2	3	4	5	6	1	2	3	4	5	6	7	8 9 10		1 2	3	4	5	6	7	8	9 10 11 12 13 14 15 16
41B		42B												801 707A						805		702		75B
														802		804		67		21	701		708	76B	77B
CONNECTS TO J1									FLEX
ON CONTROL BD
WIRE FEED					REMOTE																				805	1
																									804	2	P11
SPEED					CONTROL													S5							801	3
																									802
CONTROL					VOLTAGE										RUN-					701						4
																								CONNECTS TO J11
RHEOSTAT					RHEOSTAT											IN								ON HARNESS
10K2W						10K2W					N.C.									702
														N.B., N.C.
R1							R2																	CONNECTS TO J7
									75A							SHOWN OFF
577A		575A			77A							75B												ON HARNESS		1
																									500A	2
576A						76A							75
												76B													622A	3
												77B	76													4
													77												707A	5
																									575A	6
																									576A	7
42C												41B 41C													577A	8	P7
		CONNECT TO J18																							708
									BRIDGE																	9
41C		ON HARNESS											AC	+		667B									75	10
		P18						RECTIFIER																	76	11
1 2 3 4															D2
													-	AC											77	12
																										13
TRIGGER											621B					42B										14
																42C										15
CONNECTOR
																	21									16
	A			622A													21A						CONNECTS TO J17
P14	B			500A									AC	+		667B							ON HARNESS
	C					BRIDGE										667A									67B	1
	D
	E				RECTIFIER						621B		-	AC	D1										667A	2
																										3	P17
		TO WORK CLIP								21B						67B									21A	4
													621A	67
																									621A	5
					N.B.																					6

	P7 ON CASE				6			L5									J5																					J3	5
	FRONT			B	7		551																																					-
																																							6		BLACK
				W	8		550
														1	2	3	4	5	6		7	8	1	2	3	4	5	6	7	8	9 10 11 12								7					FAN
	1	721A																																					8		RED			+
	2	500
	3	622												667		2A	721A			67F			550		690		507		537		531		575
	4															4A			21D			621		551		691		577		578		534		576
	5	707
	6	575
	7	576
J7	8	577
	9	708
	10	75C
	11	76C
	12	77C			3B								21D														507			578				CONTACTOR COIL						67F
	13	1B																																					67C
	14	1W											21E	CURRENT
																	1	2	3		4
	15	2B			4B							21C
													TRANSDUCER
	16	2W																																					67D		67E		INPUT ELECTRODE
	1	67G				1	67C											J11																									CABLE CONNECTION
				L7
	2				667D	2	667										+
J17	3	667C				3																		CONTACTOR										NOTES:
	4	21G				4	21C																											N.A. PIN NEAREST THE FLAT EDGE OF LED LENS (ANODE) ALIGNS WITH WHITE
												76C 21E 4A 42
	5					5	621		1														N.D.											LEAD OF LED SOCKET.
	6	621C				6		J18		42		67E 75C 77C 2A 41				N.C.																		N.B. TOGGLE SWITCHES SHOWN FROM REAR CONNECTION SIDE OF SWITCH.
									2		J15																							N.C. PRESENT ON CONTROL CABLE MODELS ONLY.
	CONNECTS TO P17						CONNECTS TO P18		3	41		1 2 3 4 5 6 7 8 9 10																						N.D. PRESENT ON ACROSS THE ARC MODELS ONLY.
	ON CASE FRONT						ON CASE FRONT		4																									N.E. CONNECT "EXTRA" TO "TORQUE" ON EXTRA TORQUE MODELS ONLY.
	TIMER KIT (OPTIONAL)						14 PIN CIRCULAR CONNECTOR						J19		CONNECTS TO 14 PIN																			N.F. NOT PRESENT ON ALL MODELS.
								TO POWER SOURCE				A			CIRCULAR CONNECTOR
POST-FLOW			J60	BURNBACK																															E
						1	67				2	B																						D		A
												C	OUTPUT																			J14
		1 2 3 4 5 6 7 8				2	75D				4	D	CONTROL																					C		B		CAVITY NUMBERING SEQUENCE
						3					77D	E	REMOTE																										(VIEWED FROM COMPONENT SIDE OF P.C. BOARD)
					P15	4	76D				76D	F	VOLTAGE	GENERAL INFORMATION
						5	77D				75D	G	CONTROL
		601	605 608											ELECTRICAL SYMBOLS PER E1537																									1	2	1	3	1	4
						6	21F				21F	H																						A	J			J11, J16, J18			J12, J17		J3, J5, J9, J60
		509B 4B 606 607				7	2	L6			41A	I			LEAD COLOR CODING																					I
													42VAC																					B	K		H		3	4	4	6	5	8
						8	4				42A	J			B - BLACK																	J12				N
						9	41A					K																						C L			G		1	5	1	6	1	8
						10	42A					L			W - WHITE																			D	M			J1, J2, J8, J15			J4		J6, J7, J10
	TO P60 ON										67	M																							E	F			6	10	7	12	9	16
												N
	HARNESS
																																												C
																																												G5681

NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The wiring diagram specific to your code is pasted inside one of the enclosure panels of your machine.

lN-25™ prO