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Welder circuit board

LOCATE LINCOLN PCB L 6325

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Main pcb 880-456-000 need schematic to troubleshoot.


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check you ground cable, try to strike and ark on the ground cable, if no ark test the ground circuit if the circuit is ok you will need to have the transformer tested and for that you need some specal tools.

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You need to get a diagram of the connector on the pedal, and check the contacts leads that trigger the power on. If the power on contacts are not opening up when you let up on the pedal then the problem is in the pedal, and you will need to open it up to find the problem. If the pedal is opening and closing as it should the problem is most likely in the welders control board. I just went through a similar problem on my Miller TIG, where the pedal wasn't the problem. If you have a bad board in the welder there are places on the internet that rebuild them, for much less than Lincoln would charge for a replacement. Try the two places listed below for circuit boards if you need them.

http://www.yorkelectronics.com/

http://gemelectronics.ieasysite.com/

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1 Answer

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there is a controller board issue at that point it will have to go to a service center do to there are no supplier's for them other that Lincoln go to their sit HERE and find a service center in your area these boards range from $250.00 to $600.00 there is 4 of them in the machine they will have to remove the top and swap the boards till they find the right one have the same welder i have been through this with Lincoln already hope this helps

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clean the brush rings with a very fine emery cloth is still then there is a controller board issue at that point it will have to go to a service center do to there are no supplier's for them other that Lincoln go to their sit HERE and find a service center in your area these boards range from $250.00 to $600.00 there is 4 of them in the machine they will have to remove the top and swap the boards till they find the right one have the same welder i have been through this with Lincoln already hope this helps

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