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SQUARE WAVE TIG 355
F-31 F-31
TROUBLESHOOTING & REPAIR
INPUT CONTACTOR TEST (continued)
FIGURE F.6 - INPUT CONTACTOR (CR1) SIMPLIFIED CONTROL CIRCUIT
X1
X2
T2 PILOT
TRANSFORMER
STOP
START
CR 1
N. C.
SECONDARY
THERMOSTAT
L9
L8
.33 OHMS
MAX.
.33 OHMS
MAX.
OVERVOLTAGE
FEEDBACK
10J3
10J2
4J3
2J3
8J15
9J15
3J17
2J17
CR 1
INTERLOCK
1
0
J
4
5
J
4
1
2
J
4
T5 CONTROL
TRANSFORMER
#272
#273
#241
#242
R
W
R
FEED - THRU
BOARD
POWER
BOARD
CONTROL
BOARD
#243
#244