Pyramid PB449X blown parts

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  • Pentium4
    CapXon Be Gone
    • Sep 2011
    • 3741
    • USA
    #1

    Pyramid PB449X blown parts

    My buddy gave this to me, said he hooked it up wrong or something. Looks like it has a blown 56Ω resistor and maybe a blown polyester cap? And then once I looked closer, saw that it has some blown power FET's (They read IRFZ46N) Of course the 30A fuse popped too. I've never worked on an amp before, what kind of state is this thing in? I'll try and get more info from my buddy who gave it to me.

    It has a TL494 controller, does that mean it's just a funky half bridge?
    Attached Files
    Last edited by Pentium4; 07-17-2014, 07:01 PM. Reason: Added FET model #
    Tags: None
    • Pentium4
      CapXon Be Gone
      • Sep 2011
      • 3741
      • USA
      #2
      Re: Pyramid PB449X blown parts

      Looking through my parts pile for the resistor and polyester cap first, the poly reads "102K 100V" which means 1pf 100V 10% tolerance. I have a "102J 100V" which I'm pretty sure is the same thing but 5% tolerance, is this a suitable replacement or should I keep looking? It's definitely failed
      Attached Files

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        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 30997
          • Albion
          #3
          Re: Pyramid PB449X blown parts

          Originally posted by Pentium4
          the poly reads "102K 100V" which means 1pf 100V 10% tolerance
          i think that will be 1nf 100v

            Comment

            • Pentium4
              CapXon Be Gone
              • Sep 2011
              • 3741
              • USA
              #4
              Re: Pyramid PB449X blown parts

              Hahaha, whoops...yes you are correct Will that still be a suitable replacement?

                Comment

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