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Honda generator inverter 230v 1900uf caps

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    Honda generator inverter 230v 1900uf caps

    I have a Honda generator with a faulty inverter. The inverter is encased in black resin with just the tops of a dozen small electrolytic caps and four 230v 1900uf electrolytic caps poking out of the top of the resin. The plastic cover of one of the 230v caps was burned off but there was no sign of bulging and the capacitor can was in good condition. The heat source looks likely to be from the outside rather than from the component itself but since the inverter is basically unrepairable, I chiseled away and removed the capacitor. I had to destroy the capacitor so had no chance to test it but it was still wet inside, not dried out or swelled. I now have the terminals exposed and can replace the cap if I consider it worth it; my dilemma. A replacement cap is around $100 and I have no way of determining positive from negative connection but a replacement inverter is $1500.
    So, if I try a new capacitor but connected it backwards, will it be destroyed?
    What is the general consensus, should I risk $100 to save $1500?
    Thanks for any suggestions or ideas.

    #2
    Re: Honda generator inverter 230v 1900uf caps

    i can find those much cheaper than that

    Comment


      #3
      Re: Honda generator inverter 230v 1900uf caps

      if you removed the cap, isnt the polarity marked on the board?

      Comment


        #4
        Re: Honda generator inverter 230v 1900uf caps

        Originally posted by stj View Post
        if you removed the cap, isnt the polarity marked on the board?
        Do not count on that being the case because I have seen a lot of boards not marked or it might not be correct ( this is rare but happens) and it is even worse when they are potted
        Last edited by sam_sam_sam; 11-29-2021, 01:00 AM.
        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


          #5
          Re: Honda generator inverter 230v 1900uf caps

          Originally posted by JFA View Post
          I have a Honda generator with a faulty inverter. The inverter is encased in black resin with just the tops of a dozen small electrolytic caps and four 230v 1900uf electrolytic caps poking out of the top of the resin. The plastic cover of one of the 230v caps was burned off but there was no sign of bulging and the capacitor can was in good condition. The heat source looks likely to be from the outside rather than from the component itself but since the inverter is basically unrepairable, I chiseled away and removed the capacitor. I had to destroy the capacitor so had no chance to test it but it was still wet inside, not dried out or swelled. I now have the terminals exposed and can replace the cap if I consider it worth it; my dilemma. A replacement cap is around $100 and I have no way of determining positive from negative connection but a replacement inverter is $1500.
          So, if I try a new capacitor but connected it backwards, will it be destroyed?
          What is the general consensus, should I risk $100 to save $1500?
          Thanks for any suggestions or ideas.
          To tell you the truth, the odds don't look good that just this capacitor is the sole problem unless it is shorted inside. I would expect at least 2 of them 4 caps to be screwed, not just a single one.

          However, look at the bright side:
          Everything is covered in epoxy, makes it a very difficult and time consuming repair to start with.
          A cap isn't that bad to fix even it is epoxied. Cut the top lid and "unwind" the capacitor. DO NOT SNIP the old two legs that go from the cap into the main board. You need them later to solder carefully your new cap to, either with or without wires.

          Comment


            #6
            Re: Honda generator inverter 230v 1900uf caps

            The board is not exposed, just the two tags that were part of the capacitor. The inverter just makes that squealing sound that inverters seem to make to indicate a fault. Removing the cap made no difference to the faulty inverter.

            Comment


              #7
              Re: Honda generator inverter 230v 1900uf caps

              I figured it wouldn’t be the problem.

              Comment


                #8
                Re: Honda generator inverter 230v 1900uf caps

                I've decided not to waste money on the off chance that this one capacitor is the problem.

                Comment

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