Plasma Torch Power Controller—> took a crap

[sam_sam_sam]

Here we go again on this plasma cutting machine
First the chopper boards when on this machine now the plasma power supply controller boards
( Bad IGBT module when bad and what else I do not know at this point in time—> bought new chopper units I will try to repair them later when I have some time)

This machine is about 10 years old and all kinds of problems are coming out this unit granted the machine gets a lot of use

The IGTB module went bad also a 10k ohm resistor is open no reading at all

It has two capacitors that 3MFD that with my Blue ESR meter shows 0.00 ohms ( with them removed from the board )

With my Radio Shack meter shows 3uf —> so my question are these two capacitors bad

Below are some pictures of the board the two capacitors in question

I am also going to list the parts from Digi-Key that I think they are if I do not have the right parts please let me know thanks

Here is the resistor

https://www.digikey.com/product-deta...mSeq=279128814

Here are the capacitors

https://www.digikey.com/product-deta...mSeq=279129017

Transient Voltage Suppression Diodes —> is there a way to check this type diode

https://www.digikey.com/product-deta...mSeq=279142994

It also has one of these also

https://www.digikey.com/product-deta...mSeq=279143532

I am also going to recap the board

The one thing nice about the manual for this plasma unit it gives you resistance checks to find out if this board is giving you problems or not

[sam_sam_sam]

Re: Plasma Torch Power Controller—> took a crap

The parts that I have a link to and showed are they the right parts
Thanks

[sam_sam_sam]

Re: Plasma Torch Power Controller—> took a crap

UpDate
The two 3MFD caps that read 0.0 ESR value the new capacitors have the same results ( strange results )

When I put the 10k ohm resistor on the board I now have th resistance that the manual call for so we will see if the controller board works again or not

[sam_sam_sam]

Re: Plasma Torch Power Controller—> took a crap

UpDate

Put in the the controller board back in the plasma unit and it works very well

So it had a bad IGBT module a bad 10k ohm resistor

Some very old capacitors

Any controller boards for this plasma unit start at $800.00 or more

I repaired this controller board for about $200.00 and a couple hours of work