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F-2 F-2
WIRING DIAGRAMS
NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The specific diagram for a particular code is pasted inside the machine on
one of the enclosure panels. If the diagram is illegible, write to the Service Department for a replacement. Give the equipment code number.
L12506-2
COLOR CODE:
ELECTRICAL SYMBOLS PER E1537
GENERAL INFORMATION
265
263
260
261
U - BLUE
R - RED
W - WHITE
B - BLACK
INDICATES CONNECTOR CAVITY NO.
262
267
264
OUTPUT
CHOKE
POWER FACTOR
ENHANCEMENT
CHOKE
204B
SECONDARY
VOLTAGES
SHOWN
ARE NO LOAD
RMS VALUES
WIRE
DRIVE
MOTOR/
GEARBOX
C3C1
205206S
206B
R
1
SCR HEATSINK
ASSEMBLY
THERMOSTAT
116.6V
14.2V
14.2V
28.4V
C2
+++
C1 THRU C3
31,000 MFD
50V
15 OHMS
100 W
B
+
-
320B
1
J10
J10
390 392
J1
J4
J6
J8
J9
J7
10
J2
J5
1
3
J3
CAVITY NUMBERING SEQUENCE
(COMPONENT SIDE OF P.C. BOARD)
251
206
28.4V
W
T
A
C
H
SCR
HEATSINK
ASSEMBLY
SCR 2
G1
G2
SCR 1
252
R3
256
8
6
5
1
254253
R4
254A
550
551
4
2
7
3
DISPLAY
BOARD
515
552
500
POWER
TRANSFORMER
G2
WIRE FEED
SPEED
G2G2
-
+
208R
209R
209R
208R
354
1
2
3
4
325
324
325
4
2
GUN
TRIGGER
324
5
2
3
2
4
1
2
3
2
5
5
2
3
4
7
11
6
3
8
9
2
5
4
J8
252
550
254
500
J4
4
7
6
14
11
1
J5
J6
1
1
11
10
9
8
6
GND
X6
X5
515
206B
B
2
3
4
7
8
9
10
3
5
206
205
320
8
6
14
15
16
6
5
W
206S
207
353
X8
325B
X9
352
4
10
12
13
7
12
354
G2
204
G1
X7
390
325
555
1
J2
6
7
8
9
J1
10
1
515B
324
208
12
13
1
J3
253
251
552
551
256
209
GND
352
353
515B
555
206B
G2
X2
D1
209
X8
D2
BAFFLE
MOUNTED
RECTIFIER
DIODE
BRIDGE
208
204
X3
X4
207
X9
X5
X5
X6
X6
X7
X7
X1
X9
X8
TO
WORK
G2
352
353
FAN
MOTOR
TO
WORK
J3
TO
WORK
207
ARC
VOLTAGE
325B
OUTPUT CHOKE
THERMOSTAT
320
B
R
U
J11
**
N.A. WELDING CABLE MUST BE OF PROPER CAPACITY FOR THE
FUTURE APPLICATIONS.
NOTES:
CONDUCTOR STRAP AND WORK STUD.
OFF AND REVERSE LEAD CONNECTIONS AT CABLE
"POSITIVE". TO CHANGE POLARITY, TURN THE UNIT
CURRENT AND DUTY CYCLE OF IMMEDIATE AND
N.B. THIS DIAGRAM SHOWS THE "ELECTRODE" POLARITY
GAS
SOLENOID
CONTROL BOARD
2
1
5
8
4
1
8
1
9
16
1
3
4
6
8
1
14
7
1
12
7
6
10
6
5
1
CAVITY
1
**
(NON-LEAD SIDE OF CONNECTOR)
2
3
4
NUMBERING SEQUENCE
J11
1
2
3
8
7
6
5
4
W
B
B
R
U
W
B
J12
J12
311
GAS
SOLENOID
3
392
4
E
F
A
B
C
D
G
76
4
2
75
3218
3214
77
SPOOL GUN/
PUSH-PULL
AMPHENOL
(VIEWED
FROM REAR)
312 312
311
77
76
75
3218
3214
4
2
209R
208R
TO GROUND PER
NATIONAL ELECTRICAL
CODE
G
H2
5
4
2
13
TO SINGLE PHASE
SUPPLY LINE
H1H3
H4
W
B
H5
H2
L2L1
H1
H1
H3
H4
RECONNECT
PANEL
(SHOWN CONNECTED
FOR 230V)
LINE
SWITCH
S1
L2
L1
H5
H1
H4
H1
H4
H4
H1
H4
H1
A.01
POWER MIG 256 (230/460/575V) FOR CODE 11781
261A
TIMER PC BOARD
TIMER
SWITCH
1
2
3
4
5
6
7
8
FACTORY INSTALLED
TIMER ASSEMBLY
POWER MIG
®
256