OT Welder Problem

I have a small Lincoln wire fed, flux cored, mig welder. It has served me great for 2 years now.

Today I am having an issue with it. it seems that the trigger switch is stuck on. I took apart the handle and unplugged the switch, its still doing it. So I pulled the cover off the welder and unhooked the wire that leads to the switch, it still has the same problem.

So I know its not the switch or the wire going to it. What else can it be? The switch wire goes to a circuit board that all the electronincs go into, I dont see any broken solder joints.

I am right in the middle of a day of body work and I need this fixed.

Please help.

Thanks

 

Anyone???

 

check to see if there is a relay. one of my welders had that problem and it was a stuck relay.

 

This is what it has. I ***ume either the box on the board or the one with all the wires going to it is the relay...Am I right?

 

Usually you'll find a schematic pasted to the inside of the case. Mine has one anyway...(Different brand though)
should make IDing stuff a little easier.

 

If you bought it new, it is still under Warranty (Lincoln carries a 3 Year Warranty). If you call up the Tech guys at Lincoln (I had lost my receipt), they can tell you by the Serial Number when it was made and if it still has Warrnaty-you don't have to have the Receipt).I had a problem that was just the opposite (it would not feed), and I took it in to a Lincoln Service Center. They treated me well, took aobut 2 weeks, and the Circuit Board was fried.


Craig

 

This happened to me earlier this spring. Was welding on my T, put the gun down and walked around to the other side of the car. A rain storm was going on outside and a big clap of thunder and the lights flashed for a second. No big deal, walked around to the other side of the car towards my welder and there had to be at least 100' of wire spooled out on the ground. Circuit board was fried from a lightning strike.

 

I found the diagram inside the welder, but its pretty vauge. I guess tomorrow its a call to lincoln to find out whats up.

 

The box on the board is a transformer ( note T1 beside it) the part with AEG looks like a relay but it's hard to say from the pic. If the trigger wire goes to it then I'd say that would be the relay and it takes a high current on the secondary side so it would definitely be a good candidate for a point of failure. Stu

 

How vague can a schematic be? Just call Lincoln before someone gets hurt!

 

The trigger wire goes to the board. Pretty much everything goes to the board.

 

Your Circuit board is probaly fine too.

I'd bet the Contactor is bad and its contact points are stuck.
It is the black square block looking component,["AEG" letters on it] with the white plastic wireplugs attached to it......
It is an easy fix- draw a schematic of the wires attachment points unplug and pick one up at an electric supply house.....they are kinda generic as to their amperage capacitys and application. make sure the orientation of the wire lugs is same as yours.....