Hi everyone,
My first post here hope I have posted in the right spot for this. I am working on a Lincoln WM250 Mig welder was last using it was working left it on for a couple hours while busy doing something else, when I came back and went to weld nothing no wire feed no gas valve.
I have checked all possible basic issues and have narrowed it down to the control board, No voltage to wire feed motor or gas valve. Best I have figured the board gets it power for the wire feed motor from a auxiliary winding made into the main transformer that its a Center tap coil witch outputs about 15Vac on each leg, each leg runs through a 120Z6 Metal Oxide Varistor / a resistor / large Cap / then to the part that I think failed a rectifier (FEP16GT) My question is on this component I am testing it like a diode with my DMM Pins 1 to 2 3 to 2 Pin 3 to 2 tests ok like any diode but 1 to 2 tests shorted.
Can someone tell me if I am testing this component correctly.
Thanks, Joe
My first post here hope I have posted in the right spot for this. I am working on a Lincoln WM250 Mig welder was last using it was working left it on for a couple hours while busy doing something else, when I came back and went to weld nothing no wire feed no gas valve.
I have checked all possible basic issues and have narrowed it down to the control board, No voltage to wire feed motor or gas valve. Best I have figured the board gets it power for the wire feed motor from a auxiliary winding made into the main transformer that its a Center tap coil witch outputs about 15Vac on each leg, each leg runs through a 120Z6 Metal Oxide Varistor / a resistor / large Cap / then to the part that I think failed a rectifier (FEP16GT) My question is on this component I am testing it like a diode with my DMM Pins 1 to 2 3 to 2 Pin 3 to 2 tests ok like any diode but 1 to 2 tests shorted.
Can someone tell me if I am testing this component correctly.
Thanks, Joe