Lincoln Electric LF-72/74 Welder User Manual


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ELECTRICAL DIAGRAMS
G-3
LF-72/74
WIRING DIAGRAM - ENTIRE MACHINE - CODE 11209, 11210, 11211,11227 (L12146-1) LF-72
L12146-1
A
CAVITY NUMBERING SEQUENCE
(COMPONENT SIDE OF P.C.BOARD)
J
3
2
1
J
5,J8
J9,J60
4
3
6
1
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
COLOR CODE
B - BLACK
R- RED
U
- BLUE
COMMON ANALOG P.C. BOARD
A
D
C
B
E
554
556
TRIGGER
CONNECTOR
J4
559
515
558
COLD FEED
S1
F
EED
P
LATE
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
COLOR CODE
B - BLACK
R- RED
U
- BLUE
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
COLOR CODE
B - BLACK
R- RED
U
- BLUE
GENERAL INFORMATION
ELECTRICAL SYMBOLS PER E1537
COLOR CODE
B - BLACK
W - WHITE
R- RED
U
- BLUE
TRIGGER
INPUT
67
J1
556
10
12345678
9
11 12 13 14 15 16
J14
559
10
12345678
9
11 12 13 14 15 16
12
J3
1234
J2
1
4
3
2
6
5
P5
8
7
MOTOR /
GEARBOX
WB
B
W
L5
515
558
589
587
554
551
550
551
5
50
576
577
575C
553
552
J
7
3
4
1
2
24
K
E
Y
580
552A
605
606
601
607
608
5 6
515A
R
TACH
U
B
THERMAL LED
W
563
563
5
62
575B
562
WB
10K/2W
3
2
1
77
7
6
2
1
P7
4
3
REMOTE
C
ONTROL
V
OLTAGE
POTENTIOMETER
(
OPTIONAL)
75A
7
6A
7
7A
WIRE FEED
S
PEED
CONTROL
P
OTENTIOMETER
577A
5
76A
575A
3
2
1
10K/2W
1
4
3
2
6
5
P
8
575
577
5
76
589
TRIGGER
INTERLOCK
S2
587
-
+
BRIDGE
D
IODE
RECTIFIER
M
OUNTED
B
AFFLE
580
42
5
52A
41
552B
POST-FLOW
BURNBACK
T
IMER KIT
(OPTIONAL)
J
60
12345678
6
01
515A
6
05 607
608
606A
552
553
GAS
SOLENOID
14 PIN
AMPHENOL
CONNECTOR
T
OPOWER
S
OURCE
OUTPUT
CONTROL
A
J6
B
2C
4D
77A
E
76A
F
75A
G
H
41
I
J
42
K
L
M
67
N
REMOTE
VOLTAGE
CONTROL
42VAC
SENSE
552B
2-STEP
GAS PURGE
L4
L1
577A
576A
575A
75
7
6
77
7
5
L
2
L3
575
575C
5
75B
INPUT ELECTRODE
CABLE CONNECTION
J1,J14
9
8
16
1
5
4
8
1
J
2
6
06
606A
B
NOTES:
N.A. CAVITYNUMBERINGSEQUENCEASVIEWED FROMCOMPONENT SIDE OF BOARD.
N.B. CAVITYNUMBERINGSEQUENCEASVIEWED FROM LEAD SIDE OF CONNECTOR.
N.C. TOGGLESWITCHESANDPOTENTIOMETERS SHOWN FROMCONNECTIONSIDE OF SWITCH.
N.D. PINNEAREST THE FLAT EDGE OF LED LENS ALIGNS WITH WHITE LEAD OF LED SOCKET.
N.B.
N.B.
N.B.
N.D.
N.C.
N.C.
N.C.
N.C.
N.A.
N.A.
N.B.
N.B.
G-3
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.
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