Valley FABRICATOR 251 Service Manual - Fabricator 251
Manual is about: MIG WELDING MACHINE
of
104
FABRICATOR 251
A-8
August 22, 2008
APPENDIX 5: SPOOL GUN PCB
1
2
3
4
4
3
2
1
D
C
B
A
DATE
EC No.
REVISION
ZONE
No.
No. ZONE
REVISION
EC No.
DATE
+14Vdc
R13
22K
R20
22K
R15
22K
R16
22K
R18
6K8
R19
22K
R22
22K
R25
100K
R26
22K
+14Vdc
+14Vdc
+14Vdc
D18
1N4004
D15
1N4004
C9
100n
C11
100n
C8
100n
13
12
14
U3D
LM324
Q4
BC337-40
+14Vdc
R14
22K
R17
22K
R21
22K
R24
100K
R23
22K
+14Vdc
D17
1N4004
D16
1N4004
C10
100n
9
10
8
U3C
LM324
Q3
BC337-40
6
5
7
U3B
LM324
2
3
1
4
11
U3A
LM324
1
2
3
4
5
6
X3
CON6
SPOOL TRIG
NORM TRIG
24VAC_1
Vin
3
ADJ
1
+Vout
2
U1
LM317T
D12
1N4004
D13
1N4004
D10
1N4004
D11
1N4004
C4
100n
C1
470u 50V
C5
22u 50V
C3
100n
R9
2K7
R10
270R
+14Vdc
D2
1N4004
24VAC_2
+35Vdc
D
9
Q
13
CLK
11
Q
12
R
10
S
8
VCC
14
GND
7
U2B
4013
+14Vdc
C6
100n
Art # A-07604