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Plasma Torch Power Controller—> took a crap

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    Plasma Torch Power Controller—> took a crap

    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
    Attached Files
    Last edited by sam_sam_sam; 12-09-2018, 03:49 PM.
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

    #2
    Re: Plasma Torch Power Controller—> took a crap

    The parts that I have a link to and showed are they the right parts
    Thanks
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

    Comment


      #3
      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
      9 PC LCD Monitor
      6 LCD Flat Screen TV
      30 Desk Top Switching Power Supply
      10 Battery Charger Switching Power Supply for Power Tool
      6 18v Lithium Battery Power Boards for Tool Battery Packs
      1 XBox 360 Switching Power Supply and M Board
      25 Servo Drives 220/460 3 Phase
      6 De-soldering Station Switching Power Supply 1 Power Supply
      1 Dell Mother Board
      15 Computer Power Supply
      1 HP Printer Supply & Control Board * lighting finished it *


      These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

      1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
      2 Hem Saw Computer Stack Board

      All of these had CAPs POOF
      All of the mosfet that are taken out by bad caps

      Comment


        #4
        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
        Last edited by sam_sam_sam; 02-06-2019, 09:10 PM.
        9 PC LCD Monitor
        6 LCD Flat Screen TV
        30 Desk Top Switching Power Supply
        10 Battery Charger Switching Power Supply for Power Tool
        6 18v Lithium Battery Power Boards for Tool Battery Packs
        1 XBox 360 Switching Power Supply and M Board
        25 Servo Drives 220/460 3 Phase
        6 De-soldering Station Switching Power Supply 1 Power Supply
        1 Dell Mother Board
        15 Computer Power Supply
        1 HP Printer Supply & Control Board * lighting finished it *


        These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

        1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
        2 Hem Saw Computer Stack Board

        All of these had CAPs POOF
        All of the mosfet that are taken out by bad caps

        Comment

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