F-3
WIRING DIAGRAM
F-3
SQUARE WAVE TIG 275
B 232
R1
R2
R3
T3
R 222
POSTFLOW CONTROL POTENTIOMETER 10K
PHASE SHIFT RESISTOR 200/100
(U)
(V)
L1
255
254
L1
L2
C1
RECONNECT PANEL
R3
RECEPTACLE
G2
R5
SCR4
246
2 STEP TIG
BRASS
115VAC
251
TERMINAL
243
248
D2
MAIN TRANSFORMER
HI-FREQ TRANSFORMER
D1
(+)
HIGH VOLTAGE TRANSFORMER
SCR1
W 221
B
SCR2
VIEW OF CONNECTOR ON PC BOARD
ELECTRICAL SYMBOLS PER E1537.
276
A
F
J6
C
C
E
J7A
TOROIDL5
ARC STARTER AS'BLY
253
N.A. CONNECTION IS PIN TO PIN BETWEEN
248
A
BB
R5
236B
250
G4
STICK
218
G1
CAPACITORS (OPTIONAL)
211A
THERMOSTAT
W 221 (+)
218
G1
G2
R8
R7
S3
B 242
STABILIZER
SCR1,2,3,4
+
-
TL1
OHMS/WATTS
COMPONENT VALUE
UNITS:
SV2
RESISTORS:
277
MFD/VOLTS
CAPACITORS:
Y
CONTROL PC BOARD
THERMAL LIGHT
243
4 STEP TIG
POLARITY
S2
261
X2
THERMOSTAT
SECONDARY
CHOKE
NEG
X6
23VAC
X4
115VAC
PC BOARD
X8
X7
18VAC
10-16-98
W 201
R 210
W 209
232A
N.B. ROBOTIC INTERFACE CONNECTION.
10K A-B
H2 (460V)
HI-FREQ PROTECTION CAPACITORS, .22/400
(REAR VIEW, SHOWN
E
C1,C2
DOWNSLOPE CONTROL POTENTIOMETER 100K
C5
C6
RESISTOR 7.5/100
RESISTOR 1/25
INPUT POWER SWITCH
CB
EXAMPLE: THIS IS PIN 7
POLARITY SWITCH
0F CONNECTOR J5
MICROSWITCH ON POLARITY SWITCH
3 WAY MODE SWITCH
L1
MAIN SCRs
GAS SOLENOID, 115VAC
B
LATCH
CURRENT CONTROL
L2
N.C. NOT PRESENT ON EARLIER PC BOARDS.
SV1
SV1
S1
R4
AMPTROL
W
R
B
B
W
H
B
W
D
H1
NC
MICRO-SWITCH
CLOSED
CLOSED
OPEN
R1
277
J20
R4
276
J21
277A
LOW
NO
314
216
G4
B
217
H4
POS
D
FRONT GANG
R2
BALANCE CONTROL
LEAD COLORING CODE:
B-BLACK
21
8
X5
L4
L3,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
C8
DC+
211
REAR GANG
DC-
115VAC
R6
S2A
TL1
G-GREEN
O-ORANGE
R-RED
CONNECTOR PIN NUMBERS:
C6
277B
245
DISPLAY
254
J2
J1
255
AT MINIMUM
D
F
J7
J8
7
14
U-BLUE
Y-YELLOW
W-WHITE
OUTPUT INDUCTOR (CHOKE)
POWER FACTOR CAPACITORS, 50/460
T1
C3,C4
T2
PC BOARD
T3
GAP
SPARK
L3
REMOTE
260
HIGH
C
AC
D2
L10747-2
3
WATER SOLENOID, OPTIONAL, 115VAC
21
THERMAL LIGHT, LED
C7
316
(U)
POWER FACTOR
C2
R 222 (-)
A
ELECTRICAL CODE
POWER SWITCH
NATIONAL
TO GROUND PER
CONNECT A TO LOW (H2)
CONNECT A TO HIGH (H4)
575 VOLT CONNECTION (AS SHOWN)
TIG
247
312
NEG
275C
S2A
POLARITY SWITCH MICRO SWITCH
HI-FREQ INDUCTORS
CURRENT CONTROL POTENTIOMETER 10K
BALANCE CONTROL POTENTIOMETER 10K
F
231B
232B
F
OR
TM
E
H4 (575V)
H1
211
B 231
C4C3
L1
460 VOLT CONNECTION
SWITCH
SCR3
D1
R6
WORK
BYPASS/
R7
216
315
J4 AND J20 (i.e. PIN 1 TO PIN 1).
J5
238
236
WATER VALVE (OPTIONAL)
234A
235A
FAN
GAS VALVE
3
J5
ELECTRODE
PULSER
237
OPTIONAL
MODE SWITCH
CB
312
275B
275C
N.B.
TOROID
THERMOSTAT
PRIMARY
S2
A
253
252
236A
245
SV2
242
DOWNSLOPE CONTROL
POSTFLOW CONTROL
POS
B-D, A-E, C-F, G-H
IN AC POSITION)
HOLDING RESISTOR 50/225
C7,C8
S3
275
249
246
312
H1
(V)
X1
MID
S
F
X10
X9
18VAC
X3
212
232C
8
WIRING DIAGRAM - SQUARE WAVE TIG 275 (460/575/1/60)
S1
L2
CIRCUIT BREAKER, 10 AMP
L2
275A
252
275
251
247
(-)
277C
220
J4
S
G3
J3
H2
220A
BY-PASS CAPACITORS, .0047/3kV
HIGH VOLTAGE CAPACITOR, .0015/12kV
PHASE SHIFT CAPACITOR 15uF/250VAC
FREE WHEELING DIODE
DIODE
HI-FREQ PROTECTION CHOKE (TOROID)
313
270
220
217
G3
211B
232
R8
REMOTE
L5
TOROID
209
210
235
231
238
234
232A
204
211A
236
212
201
220A
N.A.
N.C.
A
F
