Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 86

F-34
FIGURE F.6 – INPUT CONTACTOR (CR1) SIMPLIFIED CONTROL CIRCUIT
STOP
X1
START
T2 PILOT
TRANSFORMER
X2
N. C.
SECONDARY
THERMOSTAT
TROUBLESHOOTING AND REPAIR
INPUT CONTACTOR TEST (continued)
.33 OHMS
3J17
#241
CR 1
.33 OHMS
INTERLOCK
2J17
#242
#243
CR 1
FEED - THRU
BOARD
#244
SQUARE WAVE TIG 355
J
4
MAX.
9J15 4J3
#272
L9
MAX.
8J15
2J3
#273
L8
POWER
BOARD
T5 CONTROL
TRANSFORMER
R
W
R
1
1
0
5 2
J
J
4 4
OVERVOLTAGE
10J2 10J3
FEEDBACK
CONTROL
BOARD
F-34