F-1
WIRING DIAGRAM
F-1
SQUARE WAVE TIG 175 PRO
(-)
(+)
SCR4
SCR2
SCR1
D
C
B
A
F
E
D
C
B
A
+
-
REAR GANG
L1
(-)
ELECTRODE
T4
NC
NO
MICRO-SWITCH
T3
S
F
L3
L4
C3
SCR3
115VAC
Y
W
H1
X1
H
G
311
312
OPEN
CLOSED
CLOSED
G4
216
G3
218
G2
G1
217
220
X2
FRONT GANG
E
F
PC BOARD
THERMAL LIGHT
J5
CONTROL PC BOARD
D1
J3
INPUT PLUG
PL1
S2
R1
S3
MODE SWITCH
TL1
SV1
GAS VALVE
S2A
BYPASS/
STABILIZER
H1
X1
X2
FAN
R 222
W 221
( STICK - CLOSED
TIG - OPEN )
WORK
R2
ARC STARTER AS’BLY
236A
237
C4
R3
S
F
S
F
W 221 (+)
R 222 (-)
J1
J2
313
314
277
276
275
277
276
275
241
244
242
243
231
233
311
312
243
244
231
233
A
B
C
D
E
B
C
D
A
E
TIG
STICK
234
235
234
235
210
232
204
236
209
230
238
201
J6
236B
217
218
G3
216
G1
G2
220
G4
POWER "ON" LIGHT
236A
REMOTE
RECEPTACLE
REMOTE
AMPTROL
J4
B-BLACK
R-RED
Y-YELLOW
G-GREEN
U-BLUE
W-WHITE
LEAD COLORING CODE:
CONNECTOR PIN NUMBERS:
VIEW OF CONNECTOR ON PC BOARD
123 7
8
14
D1
MICROSWITCH ON POLARITY SWITCH
T1 MAIN TRANSFORMER
LATCH
SCR1,2,3,4
FREE WHEELING DIODE
S2A
O-ORANGE
L1
L2
C3
MAIN SCRs
T3
T4
HIGH VOLTAGE TRANSFORMER
L3,L4 HI-FREQ INDUCTORS
HIGH VOLTAGE CAPACITOR, .0015/12kV
HI-FREQ TRANSFORMER
R1
CURRENT CONTROL POTENTIOMETER 10K
EXAMPLE: THIS IS PIN 7
0F CONNECTOR J4
C4
R3
R2 HOLDING RESISTOR 50/100
PHASE SHIFT RESISTOR 200/100
PL1 POWER "ON" LIGHT, 115VAC
HI-FREQ PROTECTION CHOKE (TOROID)
SV1
TL1
THERMAL LIGHT, LED
COMPONENT VALUE
UNITS:
RESISTORS:
CAPACITORS:
OHMS/WATTS
MFD/VOLTS
J4
PHASE SHIFT CAPACITOR 15uF/250VAC
OUTPUT INDUCTOR (CHOKE)
GAS SOLENOID, 115VAC
SPARK
GAP
B
B
AC
DC+
DC-
A-C, D-E, B-F
B-D, C-E, A-F, G-H
B-D, A-E, C-F, G-H
POLARITY SWITCH MICRO SWITCH
(REAR VIEW,
SHOWN IN AC POSITION)
115VAC
115VAC
18VAC
18VAC
78VAC
T1
L1
L2
TO GROUND PER
POLARITY
SWITCH
ELECTRICAL SYMBOLS PER E1537.
TM
CURRENT CONTROL
POWER
SWITCH
H3
H2
H3 (230V)
H2 (208V)
NATIONAL ELECTRICAL CODE
VOLTAGE RECONNECTION
230 VOLT CONNECTION (AS SHOWN)
H1 and H3 TO POWER SWITCH.
208 VOLT CONNECTION
H1 and H2 TO POWER SWITCH.
H3 NOT CONNECTED: INSULATE.
H2 NOT CONNECTED; INSULATE.
238
236
TOROID
L2
POS
THERMOSTAT
THERMOSTAT
CHOKE
SCR HEATSINK
B X4
W X5
W X3
W X6
B X7
B X8
10K A-B
AT MINIMUM
C1,C2
BY-PASS CAPACITORS
C2C1
C1 AND C2 MUST ALWAYS BE
CONNECTED ACROSS POWER SWITCH.
209
210
201
204
230
232
241
242
WIRING DIAGRAM - SQUARE WAVE TIG 175 PRO (208/ 230/ 1/ 60)
TIG
PULSER
OR
F
F
1-00
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..
