Troubleshooting & repair, Power board test (cont.), V300-i – Lincoln Electric INVERTEC SVM101-B User Manual
Page 80: Simplified trigger circuit, F-50, Figure f.24 - simplified trigger cicuit
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V300-I
TROUBLESHOOTING & REPAIR
F-50
F-50
POWER BOARD TEST (cont.)
FIGURE F.24 - SIMPLIFIED TRIGGER CICUIT
FROM PROTECTION
BOARD OVERVOLTAGE
PWM
OUTPUTS
TO POWER
BOARD
7J6
2J6
11J4
3J4
13J36
5J36
8J33
6J34
9J4
12J4
3J31
6J22
6J4
POWER BOARD
CONTROL BOARD
REMOTE
PROTECTION
BOARD (STT ONLY)
14 AMPHENOL
#301
#305
#503A
#224
#210
#212
#223
#212C
#413
#405
C
D
T1 AUXILIARY
TRANSFORMER
2
4
V
A
C
P
W
M
SIMPLIFIED TRIGGER CIRCUIT
5J4
TO
POWER
BOARD
2J31
3.5 ohms
3.5 ohms
STT II Only
#379
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