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VIZIO M552i-B2

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    #41
    Re: VIZIO M552i-B2

    Originally posted by gregcs View Post
    Anyone ever find a diagram for this model? I'm having a problem with my power supply board - it blew up chip IC 901 (which is an Infineon ice3b1565), which I'm able to find to order. Based on some discoloration on the back of the board, it seems like it may have a problem with part L801 as well, but I can't tell what it is. Looks like some kind of voltage regulator maybe - it's the very upper left part in this image https://www.ebay.com/itm/NEW-Vizio-M...9/114285632480
    L801 is transformer for PFC. Doubt if it's bad. Doubt if you could find one anyway. If your chip is bad, you need to check the fet it drives for short.
    I assume no responsibility for any stupid suggestions I might post.

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      #42
      Re: VIZIO M552i-B2

      Thanks for the speedy reply....should power be off to the edge boards whilst testing?

      Thanks
      Signature:Seemingly hopeless tv fixer

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        #43
        Re: VIZIO M552i-B2

        Originally posted by viewerau View Post
        Thanks for the speedy reply....should power be off to the edge boards whilst testing?

        Thanks
        Yes power off, no power on while testing in diode or ohm mode.

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          #44
          Re: VIZIO M552i-B2

          Thanks
          Signature:Seemingly hopeless tv fixer

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