Lincoln Electric SVM188-A Service Manual page 55

F-15
INTERNAL TRIGGER CIRCUIT TEST (continued)
TS 2
21+ 21- 41 4 2 31 32
10AMP
CIRCUIT
BREAKER
42
TERMINAL
STRIP TS 2
14-PIN
RECEPTACLE
2
C
K
42
4
D
I
41
TROUBLESHOOTING AND REPAIR
FIGURE F.4 - TERMINAL STRIPS AND AMPHENOL
TS 1
75 76 77
FIGURE F.5 - SIMPLIFIED TRIGGER DIAGRAM
To 42A at Main
Transformer
2
4
41
To 41 at Main
Transformer
DC-600
10 AMP
CIRCUIT
BREAKER
OUTPUT
TERMINALS
SWITCH
A = 3 2
B = G N D
L
14 PIN
C = 2
CONNECTOR
D = 4
E = 7 7
2
2 OUTPUT
TERMINAL
SWITCH
4
4
41
F-15
K = 4 2
J = 3 1
I = 4 1
N
H = 2 1
G = 7 5
F = 7 6
M
FIRING BOARD
11J5
4J5
CONTROL
LED10
10J5
LATCHING
9J5
RESISTOR
ENABLE
1J5
FIRING
CIRCUIT
ENABLE
291
TO
BOARD
290