Lincoln Electric INVERTEC STT Series Service Manual page 87

F-46
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
J1 J4
J2 J3
210
(lead#223) at the control PC board.
Figure F.21 and Figure F.22, Simplified
Trigger Circuit Diagram.
F-46
223
See