Sanyo DP47460

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  • hbdeals
    Senior Member
    • Oct 2014
    • 55
    • USA

    #1

    Sanyo DP47460

    Just got one of these TV's that powers up to the Sanyo splash screen then shuts down. I was told that nothing has ever been done to it, but the power supply board has 3 different brand named capacitors in it. Rubycon, Nichicon, and one green Suncon.

    I'd like to find out if these are the original caps before I go poking down the path of hacking up the audio circuit. The solder joints look factory, but if someone has replaced these with caps that were just lying around, who knows if they are even the correct values.

    There's a schematic on the web for everything except the power supply board.

    Is there anyone that knows of a way to get a schematic or component list for the power supply of this unit?
  • hbdeals
    Senior Member
    • Oct 2014
    • 55
    • USA

    #2
    Re: Sanyo DP47460

    I removed the power fail diode and the set powers up and stays on. There's no sound because the audio amplifier has no supply voltage now. Does anyone know the point where you can supply the audio circuit with an external 13 volt power supply on this model?

    Here's the manual https://www.badcaps.net/forum/attach...6&d=1370375597

    Comment

    • dick_barton
      Badcaps Legend
      • Aug 2015
      • 6642
      • Wales

      #3
      Re: Sanyo DP47460

      Originally posted by hbdeals
      I removed the power fail diode and the set powers up and stays on. There's no sound because the audio amplifier has no supply voltage now.
      What diode did you remove?
      Willing to help but I'm no expert.

      Comment

      • hbdeals
        Senior Member
        • Oct 2014
        • 55
        • USA

        #4
        Re: Sanyo DP47460

        Originally posted by dick_barton
        what diode did you remove?
        d1674

        Comment

        • dick_barton
          Badcaps Legend
          • Aug 2015
          • 6642
          • Wales

          #5
          Re: Sanyo DP47460

          This should help you
          https://www.youtube.com/watch?v=KSYCn93pz6k
          Willing to help but I'm no expert.

          Comment

          • hbdeals
            Senior Member
            • Oct 2014
            • 55
            • USA

            #6
            Re: Sanyo DP47460

            That video is a slightly different design. This board has no 13 volt test point marked on the board.

            Comment

            • dick_barton
              Badcaps Legend
              • Aug 2015
              • 6642
              • Wales

              #7
              Re: Sanyo DP47460

              Does it have the same IC?
              Willing to help but I'm no expert.

              Comment

              • hbdeals
                Senior Member
                • Oct 2014
                • 55
                • USA

                #8
                Re: Sanyo DP47460

                It does have the same audio voltage regulator, but the board is laid out differently.

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6642
                  • Wales

                  #9
                  Re: Sanyo DP47460

                  What voltage do you have between Pin2 and Pin4, also between Pin7 and Pin 4 of IC1670
                  Willing to help but I'm no expert.

                  Comment

                  • hbdeals
                    Senior Member
                    • Oct 2014
                    • 55
                    • USA

                    #10
                    Re: Sanyo DP47460

                    I already buttoned it up and using the tv with a sound bar, but IC1670 was getting a 24 volt input and 1.1v output. I'll try to check those pins when there's some spare time. Thanks for your help.

                    Comment

                    • dick_barton
                      Badcaps Legend
                      • Aug 2015
                      • 6642
                      • Wales

                      #11
                      Re: Sanyo DP47460

                      I suspect the chip is faulty as in the video and needs replacing.
                      Willing to help but I'm no expert.

                      Comment

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