Lincoln Electric INVERTEC SVM129-B Service Manual page 89

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FIGURE F.20 – 14 PIN AMPHENOL AND PLUG J31 PIN ASSIGNMENTS
5. Using the ohmmeter check for approximately
3.5 ohms resistance from pin "D" of the 14 pin
amphenol to plug J31 pin 2 (lead #212). See
Figure F.20, and Figure F.22, Simplified
Trigger Circuit Diagram.
J5
6. Using the ohmmeter, check for approximately
3.5 ohms resistance from pin "C" of the 14 pin
amphenol (see Figure F.20) to plug J4 pin 9
TROUBLESHOOTING & REPAIR
TRIGGER CIRCUIT TEST (continued)
FIGURE F.21 – CONTROL PC BOARD MOLEX PLUG
J17
J27 J28
INVERTEC STT
212
PLUG J31
J2 J3 J1
210
(lead#223) at the control PC board.
Figure F.21 and Figure F.22, Simplified
Trigger Circuit Diagram.
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223
J4
See