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Kasino Lounge B Blowing Fuses

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  • Kasino Lounge B Blowing Fuses

    This amp blew the fuse, and I replaced it with a proper fuse holder, plugged it into my current limiter, and fired it up, the bulb turned on max, so there's a short somewhere. I'm suspecting the output transistors since this is a little 25w bass amp, and it likely got cranked up and blown. I'm not having any luck finding the transistors though. They read:

    This is the transistor on the right side (looking with heat sink on top of board)
    62278
    RCA
    C S 418

    and left side

    62277
    RCA
    C (2 or z?) 422

    Which of these is the part number?

    Also, next to the zener diodes are some white parts with red stripes. Are these diodes as well? I haven't seen any quite like them. There are no part numbers on them either.

  • #2
    62277 & 78:
    http://www.nteinc.com/specs/100to199/pdf/nte196.pdf

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    • #3
      Originally posted by soundguruman View Post
      Thank you!

      It also has a SE540L transistor. How do I test this part?

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      • #4
        according to what I have, SE540L is a 10 pin driver IC
        SE540 pdf, SE540 description, SE540 datasheets, SE540 view ::: ALLDATASHEET :::
        How many pins does it have?

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        • #5
          Originally posted by soundguruman View Post
          according to what I have, SE540L is a 10 pin driver IC
          SE540 pdf, SE540 description, SE540 datasheets, SE540 view ::: ALLDATASHEET :::
          How many pins does it have?
          10 pins, in a metal case with a heat sink attached to the top of it, looks like a halo. Sorry, I had transistors on the brain!

          I pulled the output transistors, and it still makes the current limiter glow full on.

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          • #6
            check the rectifier diodes

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            • #7
              Originally posted by soundguruman View Post
              check the rectifier diodes
              It was a blown rectifier diode. I changed all 4 and it's all working again. Thanks soundguruman!

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              • #8
                Rock on with your bad self, Atomic Mass dude.
                Anybody who can open their amp and find a shorted diode, and replace it...
                Is bbbbb bad to the bone Holmes.

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