what component can i fix on main board for sound?

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  • vinceroger69
    Badcaps Legend
    • Mar 2012
    • 6714
    • uk

    #21
    Re: what component can i fix on main board for sound?

    yes tv on and test the pins budm mentions.

    Comment

    • mattstolte
      Badcaps Veteran
      • Dec 2013
      • 612
      • usa

      #22
      Re: what component can i fix on main board for sound?

      ok on vcc I get 12v and on mute and standby I get nothing

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #23
        Re: what component can i fix on main board for sound?

        OK, the IC is being commanded to stay on STBY/MUTE mode, if you read page 3/11 and 4/11 then you will understand the STBY and Mute function.
        The STBY should have slow voltage rise to least 1.8VDC applied first to get out off standby mode and then a delayed voltage rise of 2.9VDC to get out of mute function.
        I have doubt from the beginning that both amplifiers inside went out at the same time, now you need to trace out the connections of the stby and the Mute pins to see where they are connected to.
        Attached Files
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • mattstolte
          Badcaps Veteran
          • Dec 2013
          • 612
          • usa

          #24
          Re: what component can i fix on main board for sound?

          Originally posted by budm
          OK, the IC is being commanded to stay on STBY/MUTE mode, if you read page 3/11 and 4/11 then you will understand the STBY and Mute function.
          The STBY should have slow voltage rise to least 1.8VDC applied first to get out off standby mode and then a delayed voltage rise of 2.9VDC to get out of mute function.
          I have doubt from the beginning that both amplifiers inside went out at the same time, now you need to trace out the connections of the stby and the Mute pins to see where they are connected to.
          this is starting to get real complicated, but i am willing to learn if you guys continue to walk me threw this. there aint no way in resetting the main board so it gets off the mute?

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #25
            Re: what component can i fix on main board for sound?

            It is going to be easy to walk through unless you have wiring diagram for this board, this is multi layers board which you will have to trace out those two pins to see where they go to. You will have to trace out the board and draw up the diagrams.
            What you can do one thing just to make sure those two pins are not grounded out is to test the resistance between the gnd and each one of those two pins to see if it shows very low resistance, other than that not much else.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

            • mattstolte
              Badcaps Veteran
              • Dec 2013
              • 612
              • usa

              #26
              Re: what component can i fix on main board for sound?

              it is going to be easy or it isn't?>

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #27
                Re: what component can i fix on main board for sound?

                It is not going to be easy. Try tracing it out then you will see how difficult it will be.
                Never stop learning
                Basic LCD TV and Monitor troubleshooting guides.
                http://www.badcaps.net/forum/showthr...956#post305956

                Voltage Regulator (LDO) testing:
                http://www.badcaps.net/forum/showthr...999#post300999

                Inverter testing using old CFL:
                http://www.badcaps.net/forum/showthr...er+testing+cfl

                Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                http://s807.photobucket.com/user/budm/library/

                TV Factory reset codes listing:
                http://www.badcaps.net/forum/showthread.php?t=24809

                Comment

                • Clydeuk
                  Senior Member
                  • Jan 2012
                  • 193

                  #28
                  Re: what component can i fix on main board for sound?

                  Just a daft question. The speakers aren't switched off in the sound menu are they?

                  I got caught by that one once.

                  Comment

                  • mattstolte
                    Badcaps Veteran
                    • Dec 2013
                    • 612
                    • usa

                    #29
                    Re: what component can i fix on main board for sound?

                    No. And I'm proly gonna give up on this cause Im lost

                    Comment

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