Welder User Manual

F-2
WIRING DIAGRAM
F-2
SQUARE WAVE TIG 175 PRO
L1
L2
241
TL1
THERMOSTAT
242
CONTROL PC BOARD
H1
T1
78VAC
18VAC 18VAC 115VAC
POLARITY SWITCH
PL1
W X5
B X4
W X3
HIGH VOLTAGE CAPACITOR, .0015/12kV
H2 (460V)
H3 (575V)
C2C1
PULSER
GAS SOLENOID, 115VAC OUTPUT INDUCTOR (CHOKE)
PHASE SHIFT CAPACITOR 15uF/250VAC
C4 C3
B
B
GAP SPARK
B-D, A-E, C-F, G-H
B-D, C-E, A-F, G-H A-C, D-E, B-F
DC-
216
TM
OR
TIG
ELECTRICAL SYMBOLS PER E1537.
VIEW OF CONNECTOR ON PC BOARD
CONNECTOR PIN NUMBERS:
236A
J6
G4
209
238
210
230
232
238
POS
234
235
204
201
236
216
L10569-1
311
312
G1
X1
G2
X2
217
H2
220
G3
218
1-00
W X6
B X7
B X8
NC
NO
OPEN CLOSED CLOSED
MICRO-SWITCH
(-)
G
H
BY-PASS CAPACITORS
FRONT GANG
E
F
C1,C2
S F
F S
H3 NOT CONNECTED: INSULATE.
H1 and H2 TO POWER SWITCH.
C1 AND C2 MUST ALWAYS BE
460 VOLT CONNECTION
CONNECTED ACROSS POWER SWITCH.
H2 NOT CONNECTED; INSULATE. H1 and H3 TO POWER SWITCH.
575 VOLT CONNECTION (AS SHOWN)
VOLTAGE RECONNECTION
POWER "ON" LIGHT
314
313
W 221 (+)
R 222 (-)
WIRING DIAGRAM - SQUARE WAVE TIG 175 PRO (460/575/1/60)
D
235
GAS VALVE
REAR GANG
B
A
C
F E D C B A
-
+
D1
U-BLUE W-WHITE Y-YELLOW
L1 L2 LEAD COLORING CODE: B-BLACK G-GREEN R-RED
(-)
T4
C3
ELECTRODE
L3
S
L4
T3
F
J4
LATCH
EXAMPLE: THIS IS PIN 7
MFD/VOLTS
1
OHMS/WATTS
CAPACITORS: RESISTORS: UNITS:
COMPONENT VALUE
THERMAL LIGHT, LED HI-FREQ TRANSFORMER
O-ORANGE
HIGH VOLTAGE TRANSFORMER MAIN TRANSFORMER MAIN SCRs
MICROSWITCH ON POLARITY SWITCH PHASE SHIFT RESISTOR 200/100 HOLDING RESISTOR 50/100
TL1
CURRENT CONTROL POTENTIOMETER 10K
T4
POWER "ON" LIGHT, 115VAC
T3
HI-FREQ INDUCTORS
T1
HI-FREQ PROTECTION CHOKE (TOROID)
SV1 SCR1,2,3,4
FREE WHEELING DIODE
S2A R3 R2 R1 PL1 L3,L4
G4
PER NATIONAL ELECTRIC CODE. CONNECT BLACK AND WHITE LEADS TO SUPPLY CIRCUIT.
N.A. CONNECT GREEN/YELLOW LEAD TO GROUND
236
SV1
234
14
7
8
32
0F CONNECTOR J4
115VAC
L1
SCR4
Y
SCR3
(+)
SCR2
SCR1
H3
R2
WORK
233
277 276
231
312 244 311
242 241
ARC STARTER AS’BLY
233 275 231 276 243
237
C4
277
R3
236A
CURRENT CONTROL
TOROID
L2
SHOWN IN AC POSITION) (REAR VIEW,
X2
X1
DC+
POLARITY SWITCH MICRO SWITCH
AC
232
230
204
201
210
209
115VAC
( STICK - CLOSED
TIG - OPEN )
THERMAL LIGHT
217
G1
218
G2
G3
220
TIG
236B
J1
10K A-B AT MINIMUM
A B
S2A
H1
S2
FAN
D1
BYPASS/
STABILIZER
PC BOARD
R 222 W 221
R1
S3
J3
MODE SWITCH
275
STICK
243 244
J2
W
AMPTROL REMOTE
RECEPTACLE REMOTE
J4
C D E F
E D
F
C A B
J5
CHOKE
THERMOSTAT
SCR HEATSINK
{
SWITCH POWER
CONNECT GREEN LEAD TO GROUND PER NATIONAL ELECTRIC CODE. CONNECT BLACK AND WHITE LEADS TO SUPPLY CIRCUIT.
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..