Lincoln Electric LF-72/74 service manual Timer KIT

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G-3	ELECTRICAL DIAGRAMS	G-3
WIRING DIAGRAM - ENTIRE MACHINE - CODE 11209, 11210, 11211,11227 (L12146-1) LF-72

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CAVITY NUMBERING SEQUENCE

(COMPONENT SIDE OF P.C. BOARD)

1		1	2	1	3
J3	J7			J2
2		3	4	4	6
1	4		1		8

GENERAL INFORMATION

ELECTRICAL SYMBOLS PER E1537

COLOR CODE
B -	BLACK
W -	WHITE
R -	RED
U -	BLUE

575	1	575A	577A			WIRE FEED
576	2	576A		3
						SPEED
			576A	2	10K/2W
577	3	577A
				1		CONTROL
	4
			575A			POTENTIOMETER
	5				N.C.
	6

J5,J8		J1,J14
J9,J60
5	8	9	16

N.B.

P8

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552B

552

GAS

SOLENOID

553

552B

BAFFLE

MOUNTED

RECTIFIER

DIODE

BRIDGE

+ 552A

	-
41	580	42

14PIN

AMPHENOL

CONNECTOR

TO POWERL1

SOURCE

	A
	B
OUTPUT	C	2
CONTROL	D	4
REMOTE	E	77A
VOLTAGE	F	76A
CONTROL	G	75A
	H
42VAC	I	41
	J

K42

L

M

SENSE N 67

J6

N.B.

																															75A	1	75						77					REMOTE
																															76A	2	76								3	10K/2W		CONTROL
																																							76		2			VOLTAGE
																																3	77								1			POTENTIOMETER
																															77A
																																							75					(OPTIONAL)
																							INPUT ELECTRODE																			N.C.
													L2																			4
																			67				CABLE CONNECTION									P7
																															N.B.
																				FEED
																				PLATE
																			TACH														POST-FLOW							BURNBACK				TIMER KIT
																			R																	J60
																																												(OPTIONAL)
																							MOTOR /
																			U
												1							B				GEARBOX
												2
																																	1	2	3	4	5	6	7	8
											563	3
											562	4																					601		515A		605		607
											575B	5												B		W												606A 608
												6																																N.A.
											551	7					B
											550	8			W
												P5
														N.B.																														TRIGGER
								L4			L5																																	INPUT
																																										556		A
		575																																								554		B		TRIGGER
				575B																																								C	CONNECTOR
																																												D
																																														J4
				575C
																																												E
																																							606A			N.B.
																																								B		N.D.
																																	L3						606
																																												THERMAL LED
																																											W	B
																																											COLD FEED
																																										558
	580																			4								2														515A		S1
		577						575C		576																																515
			550							551	563	COMMON ANALOG P.C. BOARD										587		608			K		558	601	589											559
562		554			552A 553					556	552																		559		515
																											E
																					605		607			W	Y				606											N.C.	GAS PURGE
1	2	3	4	5	6	7	8	9	10 11 12 13 14 15 16			1	2	3	4	5	6	1	2	1	2	3	4	5	6	7	8	9	10 11 12 13 14 15 16
																																											TRIGGER
																																											INTERLOCK
							J1							J2				J3									J14
																																										589		S2

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NOTES:

N.A. CAVITY NUMBERING SEQUENCE AS VIEWED FROMCOMPONENT SIDE OF BOARD. N.B. CAVITY NUMBERING SEQUENCE AS VIEWED FROM LEAD SIDE OF CONNECTOR.

N.C. TOGGLESWITCHES AND POTENTIOMETERS SHOWN FROMCONNECTION SIDE OF SWITCH. N.D. PIN NEAREST THE FLAT EDGE OF LED LENS ALIGNS WITH WHITE LEAD OF LED SOCKET.

587

2-STEP

N.C.

N.A.

A

L12146-1

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.

LF-72/74