Electrical componant question. I dont know what this is

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Racingduster

Racingduster

Certified Welder
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My Lincoln Pro Cut 55 plasma cutter broke on me today:banghead:. its not under warrenty any more. Lincoln told me that the main power board always goes out on this model, and they get $1,000 bucks for a new board.........its only a $1,300 cutter.... So, I took it apart and found a bunch of these yellow square resitors look burnt (kind of a brownish color).

He's my deal. I dont know how to test them, and I have no idea exactly what they are called nor where to buy them.

Im hoping someone can help me out. If anything else looks like I need to test it or replace it PLEASE let me know.

THANKS FOR LOOKING GUYS!
 

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That looks like a 2.7 ohm 5W power resistor. You should be able to check it with a volt meter set on ohms. You should probably read 2.7 or possibly less if they are in parallel. I normally order electronics from digikey.com, but I don't normally work with anything that big mostly surface mount components. If they are burned up you should have a very high resistance just like the ballast resistor on your duster.
 
dart0571 said:
That looks like a 2.7 ohm 5W power resistor. You should be able to check it with a volt meter set on ohms. You should probably read 2.7 or possibly less if they are in parallel. I normally order electronics from digikey.com, but I don't normally work with anything that big mostly surface mount components. If they are burned up you should have a very high resistance just like the ballast resistor on your duster.
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Thanks! by the way the torsion bars worked out great
 
A grand. What a rip off. I doubt, frankly, that those resistors are the cause of the problem. In other words, they might be bad, but there are probably other components as well have died.
 
We had a few of these at work. Every one that went in for service they would tell us, "It's the board." So rather than just give them a grand we would bring 'em back and try to solve the issue ourselves. Turned out we never really had a bad board on even one of 'em!
There are a lot of connectors inside this machine. These can easily become a problem. Pull each one off individually and reseat them while looking for loose wires in the connectors. Linclon has been known to over crimp the wire and eventually they break off inside the black plastic connector housing.

It could be a torch issue. If crud gets between the nozzle and electrode it can give an error light. Also it is possible that the wires in the torch lead are broken or the switch that makes sure your consumables are in place is bad.

There is also a piece of tubing about three inches long from the solenoid valve to the torch connector. See if it has started to crack.

It may, in fact, be the board but we found an issue with consumables to be the most common culprit, wiring connectors second and torch issues third.

Good luck!
 
grimreaper said:
We had a few of these at work. Every one that went in for service they would tell us, "It's the board." So rather than just give them a grand we would bring 'em back and try to solve the issue ourselves. Turned out we never really had a bad board on even one of 'em!
There are a lot of connectors inside this machine. These can easily become a problem. Pull each one off individually and reseat them while looking for loose wires in the connectors. Linclon has been known to over crimp the wire and eventually they break off inside the black plastic connector housing.

It could be a torch issue. If crud gets between the nozzle and electrode it can give an error light. Also it is possible that the wires in the torch lead are broken or the switch that makes sure your consumables are in place is bad.

There is also a piece of tubing about three inches long from the solenoid valve to the torch connector. See if it has started to crack.

It may, in fact, be the board but we found an issue with consumables to be the most common culprit, wiring connectors second and torch issues third.

Good luck!
Click to expand...


I took the board in to my works maintnance dept today. They checked the board out and think that it fine. Im gonna look into what you said. Thanks!
 
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