Lincoln Electric INVERTEC V300-PRO SVM105-B Service Manual page 80

Lincoln electric welder user manual
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F-50
POWER BOARD
FROM PROTECTION
BOARD OVERVOLTAGE
T1 AUXILIARY
TRANSFORMER
3J31
6J22
#503A
2
4
V
A
C
#212
2J31
TROUBLESHOOTING & REPAIR
POWER BOARD TEST (cont.)
FIGURE F.24 - SIMPLIFIED TRIGGER CICUIT
SIMPLIFIED TRIGGER CIRCUIT
CONTROL BOARD
#301
11J4
7J6
#305
2J6
3J4
PWM
OUTPUTS
TO POWER
BOARD
STT II Only
#379
#224
#210
6J4
TO
5J4
POWER
BOARD
12J4
V300-PRO
P
W
M
#223
9J4
8J33
6J34
#212C
REMOTE
PROTECTION
BOARD (STT ONLY)
14 AMPHENOL
3.5 ohms
#413
13J36
3.5 ohms
#405
5J36
F-50
C
D

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