Vizio M260VA - No Sound

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  • caphair
    Badcaps Legend
    • Nov 2011
    • 1249
    #1

    Vizio M260VA - No Sound

    There is no sound in any input. You can see volume go up/down in correlation to pressing volume buttons but there is no sound at all

    Speakers are 8 ohm and both measure that. The datasheet for the audio ic is:
    https://cdn.badcaps-static.com/pdfs/...739888a823.pdf

    I’m just not entirely sure what to look for when probing and the pins are really small and close together so might be difficult to do
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    • attainteddragon
      Badcaps Veteran
      • Apr 2013
      • 764
      • australia
      #2
      Re: Vizio M260VA - No Sound

      http://pdf1.alldatasheet.com/datashe.../STA339BW.html

      i can't help much, but it looks like pin 8 and 11 are your supply voltage pins.
      you can probe them at the vias just above each respective pin. you may have to scrape some of the masking off.
      WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

        Comment

        • caphair
          Badcaps Legend
          • Nov 2011
          • 1249
          #3
          Re: Vizio M260VA - No Sound

          Originally posted by attainteddragon
          http://pdf1.alldatasheet.com/datashe.../STA339BW.html

          i can't help much, but it looks like pin 8 and 11 are your supply voltage pins.
          you can probe them at the vias just above each respective pin. you may have to scrape some of the masking off.
          I measure 25v on those pins

            Comment

            • caphair
              Badcaps Legend
              • Nov 2011
              • 1249
              #4
              Re: Vizio M260VA - No Sound

              So after a few probing around trying to get measurements the sound came back, went out, started crackling then would come back

              Thought maybe my probing temporarily fixed a micro crack in the solder. So I started tapping on the ic and the sound would come and go.

              Reflowed all the pins of the ic and it’s been running good for over an hour.

              Hopefully this helps someone else if they have similar experience

                Comment

                • attainteddragon
                  Badcaps Veteran
                  • Apr 2013
                  • 764
                  • australia
                  #5
                  Re: Vizio M260VA - No Sound

                  awesome. hope it lasts.

                  i would of suggested freezing the ic next to see how it behaved, but don't have to worry about that now.
                  WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

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