Tweco 251 Thermal Arc Fabricator - Manual (Page 67)

FABRICATOR 251
Manual No. 0-4847 A-3 APPENDIX
Varis to r
Indu ct or
+ C1 - C 4
C5
0.1
u
F 630V
- +
Wi re Feeder Mo tor
4 x
2
2,
000
u
F
Bridg e Recti fier
PLUGSOCKET
PLUGSOCKET
JB/
7
JB/
9
JB/
6
S2
T2
F2
S3
T5
F3
S1
F1
T1
F4
S4
0V
20 8V
23 0V
POSITI ON
1
2
3
X
X
X X
X
X
1
2 6
5
4
3
8
9 7 11
10 12
SWITCH 2 COARSE
JB/
8
WIRESPEED
1K
R I
M 2
JB/
1
JB/
2
JB/
3
43
B
L
K
43 A BLK
44
B
R
N
46
R
E
D
45
V
IO
47
G
R
Y
48
O
R
N
47 GRY
48
O
R
N
49
B
L
U
49
A
B
L
U
51
O
R
N
50 VIO
52
B
R
N
52
A
B
R
N
53
W
H
T
57 VIO
55 BLK
T1
TRANS 251 US COIL
T3
T4
SWI TCH
POSITI ON
1
2
3
X
X
X X
X
X
1
2 6
5
4
3
8
9 7 11
10 12
SWITCH 3 FI NE
5
6
4 X
X
7 X
8 X
X
X
X
X
X
X
X
X
X X
X
X
13
14 18
17
16
15
20
21 19 23
22 24
X
X
X
X
X
X
X
X
X
X
X1 /1
X1 /3
X1 /2
X2 /3
X2 /2
X2 /1
X3 /4
X3 /3
SHUNT
PCB 4
704883
X1 /6
X1 /5
X1 /4
X1 /3 DIG METER
X1 /1
21 ORN
22 VIO
23 GRY
30 C BRN
31 D ORN
A
B
C
D
E
F
G
H
I
J
J1
18 -1SF
A r t # A - 0 7 2 2 3 _ A B
MIG Timer PCB
7977965 (PCB2)
JC
NEGATIVE
OUTPUT
TERMINAL
POSITIVE
OUTPUT
TERMINAL
+
-
BR1
L1
VR1
C B 2
5 A
JD-1 JD-2
JUMPER
NOTE:
Remove this jumper and use these pins when connecting
a replacement 7978050 Control PCB