Vizio P50HDM Keypad Resistor

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  • itelite
    Senior Member
    • Aug 2016
    • 124
    • USA

    #1

    Vizio P50HDM Keypad Resistor

    I recently replaced worn out push buttons on the keypad/control (on the side of the TV, not a remote)

    Anyway, i was using hot air and happened to knock one of the resistors into another dimension. The resistor controls the Pull up for the Volume Down button.

    Does anyone randomly have this keypad and can measure the pull up resistors for me?

    Short of this my plan is to sweep it with a POT to determine the correct value, but it would be infinitely easier to know what the value is.

    Thank You.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Vizio P50HDM Keypad Resistor

    Pictures of the board and P/N as printed on the board will get more help.
    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

    • itelite
      Senior Member
      • Aug 2016
      • 124
      • USA

      #3
      Re: Vizio P50HDM Keypad Resistor





      i am looking for the value of the 3rd from the white connector.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Vizio P50HDM Keypad Resistor

        RD3?
        I thought you said it is blown away.
        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

        • itelite
          Senior Member
          • Aug 2016
          • 124
          • USA

          #5
          Re: Vizio P50HDM Keypad Resistor

          Yes RD3. That is not my board but rather the same model in a somewhat decent resolution picture form the internet. Mine is indeed blown away.

          Comment

          • itelite
            Senior Member
            • Aug 2016
            • 124
            • USA

            #6
            Re: Vizio P50HDM Keypad Resistor

            Tried to sweep with 100K Lin pot. Was able to simulate "Input" button at 68Ohm, "PIP" at 35Ohm, and "Power" at 785Ohm. Thus far, not able to get volume down though.

            7Ohm - a service menu
            Last edited by itelite; 12-20-2017, 01:57 PM.

            Comment

            • itelite
              Senior Member
              • Aug 2016
              • 124
              • USA

              #7
              Re: Vizio P50HDM Keypad Resistor

              Figured it out. Swept around with a 1K Pot

              110 Ohm to 140 Ohm is Volume down

              14 Ohm shows the name of the current input

              Comment

              • freakaftr8
                Badcaps Legend
                • Oct 2012
                • 3743
                • USA

                #8
                Re: Vizio P50HDM Keypad Resistor

                Good troubleshooting! Glad you figured it out
                Did I leave the soldering iron on?

                Comment

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