Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 77

F-25
ARC START TRIGGER CIRCUIT TEST (continued)
T5
CONTROL
TRANSFORMER
CONTROL
BOARD
1J9
3J9
TROUBLESHOOTING AND REPAIR
FIGURE F.3 – ARC START TRIGGER CIRCUIT
FEED - THRU
BOARD
L11
1J16 1J18
4.2 ohms
max.
24VAC
L13
3J16 5J18
4.2 ohms
max.
SQUARE WAVE TIG 355
PROTECTION
BOARD
L3
#204
8J23 3J22
4.2 ohms
max.
L6
#207
5J23 6J22
4.2 ohms
max.
F-25
REMOTE
RECEPTACLE
D
ARC
START
SWITCH
E