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ELECTRICAL DIAGRAMS
G-3 G-3
SQUARE WAVE TIG 275
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Wiring Diagram (L10747-2)
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.
B 232
R 222
(U)
(V)
L1
255
254
L1
L2
C1
R3
RECEPTACLE
G2
SCR4
246
2 STEP TIG
BRASS
115VAC
251
TERMINAL
243
248
D2
(+)
SCR1
W 221
B
SCR2
ELECTRICAL SYMBOLS PER E1537.
276
A
F
J6
C
C
E
J7A
ARC STARTER AS'BLY
253
N.A. CONNECTION IS PIN TO PIN BETWEEN
248
A
BB
R5
236B
250
G4
STICK
218
G1
211A
THERMOSTAT
W 221 (+)
218
G1
G2
B 242
STABILIZER
TL1
277
Y
CONTROL PC BOARD
THERMAL LIGHT
243
4 STEP TIG
POLARITY
S2
XC-UF
THERMOSTAT
SECONDARY
CHOKE
HIGH
REMOTE
E
210
209
235
231
238
H2 (460V)
234
204
212
201
236
211A
232A
247
261
260
220A
C
316
N.B. ROBOTIC INTERFACE CONNECTION.
CURRENT CONTROL
L2
N.C. NOT PRESENT ON EARLIER PC BOARDS.
SV1
AMPTROL
W
R
B
B
W
H
B
W
D
H1
NC
CLOSED
CLOSED
OPEN
R1
277
J20
R4
276
J21
277A
LOW
NO
314
216
G4
217
H4
POS
D
FRONT GANG
R2
BALANCE CONTROL
X5
L4
C5
T2
F
E
D
C
X2
X1
T1
78VAC
S
W 204
A-C, D-E, B-F
B-D, C-E, A-F, G-H
G
DC+
211
DC-
C6
277B
245
254
J2
J1
255
AT MINIMUM
D
F
J7
J8
PC BOARD
T3
GAP
SPARK
L3
REMOTE
X2
NEG
AC
E
X6
23VAC
X4
115VAC
X8
X7
18VAC
W 201
(U)
C2
R 222 (-)
A
ELECTRICAL CODE
NATIONAL
TO GROUND PER
CONNECT A TO LOW (H2)
CONNECT A TO HIGH (H4)
575 VOLT CONNECTION (AS SHOWN)
TIG
NEG
OR
TM
F
275C
S2A
F
232B
231B
POLARITY SWITCH MICRO SWITCH
A
F
H4 (575V)
H1
211
B 231
C4C3
L1
460 VOLT CONNECTION
SWITCH
SCR3
D1
R6
BYPASS/
R7
216
315
J4 AND J20 (i.e. PIN 1 TO PIN 1).
J5
238
236
234A
235A
FAN
J5J5
PULSER
237
OPTIONAL
MODE SWITCH
312
275B
275C
N.B.
TOROID
THERMOSTAT
PRIMARY
A
253
252
236A
245
SV2
242
DOWNSLOPE CONTROL
POSTFLOW CONTROL
POS
B-D, A-E, C-F, G-H
IN AC POSITION)
S3
275
249
246
312
H1
(V)
X1
MID
S
F
X10
X9
18VAC
X3
212
232C
S1
L2
275A
252
275
251
247
(-)
277C
220
J4
S
G3
J3
H2
220A
313
270
220
217
G3
211B
232
R8
(REAR VIEW, SHOWN
R 210
W 209
232A
10K A-B
L5
TOROID
N.A.
N.C.
L10747-2
C-UF