Lincoln Electric 76187, Operator'S Manual, Page: 19 / 33

D-2
CIRCUIT DIAGRAM
D-2
DURAWELD TM 350/500
DURAWELD 350 WIRING SCHEMATIC
R
G7989-1
A.03
CR1
110V AC
SCR 2
+
_
M
L1
L2
L3
V
U
W
V
1
2
5
3
6
4
202
21
3
214
220 222 223
251
252
253
255
261
262
267
91
92
93
94
95
96
251
252
253
254
255
256
261
262
267
82
221D
CONTROL CABLE
CONNECTOR
CR1
Gold Pins
+
-
FAN
J7
-7
J7
-8
J7
-4
J5
-2
J5
-4
J4-4
J4-7
J4-8
J12-7
J12-8
J3-1
J3-2
J3-4
J3-5
J12-5
J12-4
1
26
28
0
28
2
28
3
U
V
A1 A2
SCR 2
SCR 3
SCR 5
SCR 1
201
204
203
206
205
210
209
6
5
4 3
2
1
226
COIL 1
COIL 2
COIL 3
xxxxxxx
92 96 95 94 91 93
MO
T
O
R
4.7K
2.
5K
10
K
268
+15V
+/-10V
+15V
221C
220C
221B
220B
CW
CW
220D
223B
213A
214A
RI
G
H
T
SI
DE
LEFT SID
E
+10
+15
-
+ S
T
U
D
BRAKE
DRIVE
18KHZ
12
CR1
SCR 1
+
_
M
~
28V
L1
L3
U
W
U
V
W
1
2
5
3
6
4
202
21
3
214
221A
220 219
253
254
255
256
261
262
264
91
92
93
94
95
96
253
254
255
253
256
255
261
262
264
80
81
1
2
~380V-415
CR1
Gold Pins
+
-
FAN
J1
-6
J1
-5
J1
-3
J1
-4
J2-1
J2-2
J7
-3
J5
-3
J4-6
J3-3
J3-6
26A
5
4
2
25
42
28
4
28
1
28
2
28
3
U
V
W
A2
2
3
4
5
6
1
201
204
203
206
205
212
210
209
208 207
6
5
4 3
2
1
GND
COIL 1
COIL 2
COIL 3
J6
-7
22
4
xxxxxxx
92 96 95 94 91 93
265
4.
7K
2
.5
K
10
K
265
+50V
+15V
+/-10V
+15V
221C
220C
221B
220B
CW
CW
219A
221
213A
214A
R
IG
H
T
S
ID
E
LE
F
T
S
ID
E
+10
+15
+
S
T
U
D
+15
+50V
BRAKE
DRIVE
18KHZ
+24V
11
51
34
226
xxxxxxx xxxxxxx
32A
29
25
1 2 3 4 5 6 7 8
25
272
270 27
4
A V
270 271 272 274
22
0
U
G1
19
34A
38
W
39A
34
20
37
J7
-6
J7
-2
2
82
2
80
28
5
J1
-1
273
273 271
WIRE SIZE
258
257
260
259
263
J12-6
263
258
257
J12-9
J12-10
+15
260
259 +15
+
-
+
-
82
221D
-
82
83
J2-4
J2-3
+39V
82
221D
J7-5
J7-1
36
38
31
36A
32
33
F1
8A/250V
40
42A
41
到主变
40
41
219 220
221A
211
2 1.0
3 1.2
TOGGLE SWITCH (POLARITY SWITCH) PINS
THE BACK VIEW
1
2
3
~1
8V
3
4
6 7
31
10K Ω
10K Ω
100 Ω
40W
xxxxxxx xxxxxxx
8
7
6 5
4
3
2 1
ON
S1
S
2
SCR
THERMOSTAT
CONTROL BOARD
BA
LA
N
C
E
C
H
O
K
E
L2
OUTPUT CHOKE
L1
ELECTRODE
WORK
CRATER
VOLTAGE
CRATER
CURRENT
MODE TYPE
Main
Transformer
SHUNT
POWER
SWITCH
(UP) RECTIFIER 1
GAS TYPE
Auxiliary
Transformer
G
A
S
S
O
LE
N
O
ID
A
R
C
V
O
LT
S
5
K
A
R
C
C
U
R
R
E
N
T
5
K
G
A
S
P
U
R
G
E
C
O
LD
IN
C
H
T
R
IG
G
E
R
POT / SWITCH
GAS / MOTOR
CONTROL PCB LEDS:
2 LEDS FLASHING - NORMAL OPERATION
BALANCE CHOKE
THERMOSTAT (TWO IN SERIES)
Digital Meter
(DOWN) RECTIFIER 2
~220V 1A
~36V
3
AC 220V
RECEPTACLE
F2
2A/250V
Auxiliary
Transformer
29
27
28
26
28A
RED
BLUE
BLACK
1
2
J14
1 3
4 2
DURA 500 - 600A 60mV
Synchro
Transformer
TOROID
207A
209A
211A
201A
203A
205A
U1
V2
W3
U
V
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
21
0
21
1
21
2
21
3
21
4
J8
-1
2
J8
-1
0
J8
-1
4
J8
-1
5
J8
-1
1
J8
-1
3
J8
-9
J8
-4
J8
-2
J8
-6
J8
-7
J8
-3
J8
-5
J8
-1
SCR1 SCR2 SCR3
SCR4
SCR5 SCR6
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20
8
20
9
21
0
21
1
21
2
21
3
21
4
SCR1 SCR2 SCR3 SCR5
21
3
J8
-1
6
J9
-3
20
1
A
J9
-4
J8
-8
2
05
A
J9
-1
J9
-2
20
7A
20
9
A
21
1
A
2
03
A
258
257
258
257
J12-13
J12-14 +15
258
257
258
257 +15
266 J12-11 266 1 SPOT WELD
2 2 STEP
3 4 STEP
WIRE TYPE
1 0.8
xxxxxxx
J6
-2
22
5
xxxxxxx
+15V
OUTPUT CHOKE
THERMOSTAT
227
S1 ：
1) ON = PREFLOW ON
2) ON = SYNERGIC
3) ON = FAST RUN IN
4) OFF = RESERVED
S2 ：
1) ON = GENERATOR
2) ON = POWER SAVING
3) ON = PWF FEEDER
4) OFF = RESERVED
5) ON = PARAMETER POLLING
6) ON = PARAMETER SETTING
7) ON = CALIBRATION
8) ON = CALIBRATION
J10-2
J10-1 34
32A
OUTSIDE
32
~110V
31
F3
2A/250V
30
5
282
285
284
280
281
283
J1-3
J1-6
J1-5
J1-2
J1-4
J1-1
W
32
32A