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I just joined the forum but have been reading on here for a week or so.
I recently purchased a Syncrowave 250 that needs some work.Here is the back story on the welder and whats its doing.
The man I purchased it from used it in his home garage, supposedly only had it for a year or two. It worked fine up until a few months ago. He took it into his local shop to have it diagnosed. As it turns out, the PC1 board was the problem. He sent the board out for repair/rebuild to a company in Danville VA that specializes in electronic repairs (i'd be happy to provide the name to anyone via PM, don't want to call out a shop in the open forum). From what he said, all the capacitors were replaced on the board, the repair cost around $450. He installed the board in the machine and it still isn't working right. He told me he talked with a miller tech and the tech thought it to be something in the HF unit being as he had the PC1 repaired but he didn't remember what part the tech told him it might be.
With power on, the fan runs but the machine will not strike an arc. When in AC mode and the HF switch is on start or continuous you can hear (what I believe to be) the HF transformer buzz for a few seconds then stop. When the pedal is pressed the machine buzzes again but the points are not arcing. I have not hooked up a torch to see if it will scratch start, plan on doing that tonight. I do know the 110v receptacle on the front has power.
I've switched output to DC (EP and EN) and it wont strike an arc to stick weld either.
With info I found here, I tested the foot pedal, shows the appropriate ohms loads when the pedal is pressed/released. So the pedal is good.
I've pulled the covers, PC1 is clean and it is obvious the caps have been replaced. I took some pics of the board, no burned areas or anything that looks out of the ordinary, I'll post the pics later tonight. The rest of the machine is dusty, going to try to get it blown out tonight.
I did notice that the work side terminal can be wiggled a little bit, not sure if that's normal or not, ground side terminal is solid and doesn't move. There is a small area about the size of a quarter between the work and ground terminals where it looks like the metal melted or someone tried to weld something to the machine, I'll snap a pic of this as well. Previous owner told me the machine was like that when he got it and it had no impact on the machines performance before the board messed up.
I'm a novice in the welding game, hoping to get this thing up and running so I can start learning TIG.
Machine is a '93 model, Serial is KD428515.
Thanks in advance.
I recently purchased a Syncrowave 250 that needs some work.Here is the back story on the welder and whats its doing.
The man I purchased it from used it in his home garage, supposedly only had it for a year or two. It worked fine up until a few months ago. He took it into his local shop to have it diagnosed. As it turns out, the PC1 board was the problem. He sent the board out for repair/rebuild to a company in Danville VA that specializes in electronic repairs (i'd be happy to provide the name to anyone via PM, don't want to call out a shop in the open forum). From what he said, all the capacitors were replaced on the board, the repair cost around $450. He installed the board in the machine and it still isn't working right. He told me he talked with a miller tech and the tech thought it to be something in the HF unit being as he had the PC1 repaired but he didn't remember what part the tech told him it might be.
With power on, the fan runs but the machine will not strike an arc. When in AC mode and the HF switch is on start or continuous you can hear (what I believe to be) the HF transformer buzz for a few seconds then stop. When the pedal is pressed the machine buzzes again but the points are not arcing. I have not hooked up a torch to see if it will scratch start, plan on doing that tonight. I do know the 110v receptacle on the front has power.
I've switched output to DC (EP and EN) and it wont strike an arc to stick weld either.
With info I found here, I tested the foot pedal, shows the appropriate ohms loads when the pedal is pressed/released. So the pedal is good.
I've pulled the covers, PC1 is clean and it is obvious the caps have been replaced. I took some pics of the board, no burned areas or anything that looks out of the ordinary, I'll post the pics later tonight. The rest of the machine is dusty, going to try to get it blown out tonight.
I did notice that the work side terminal can be wiggled a little bit, not sure if that's normal or not, ground side terminal is solid and doesn't move. There is a small area about the size of a quarter between the work and ground terminals where it looks like the metal melted or someone tried to weld something to the machine, I'll snap a pic of this as well. Previous owner told me the machine was like that when he got it and it had no impact on the machines performance before the board messed up.
I'm a novice in the welding game, hoping to get this thing up and running so I can start learning TIG.
Machine is a '93 model, Serial is KD428515.
Thanks in advance.
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