Tnpa5340 tnpa5341

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  • Nick's Tvs
    Badcaps Veteran
    • Jan 2014
    • 621
    • USA
    #1

    Tnpa5340 tnpa5341

    I sent my SC board for repair TNPA5351 because the VS line was shorted to ground, and had several bad Diodes on the board.
    I get the board back, but the tv still doesn't turn on.
    At this point I have a bad buffer, but I don't know how to figure out which one is causing the issue, and how do I figure out which IC or IC's is or are bad. Is there an Ohms test I can perform, or some other sort of test?

    Thanks in advance for any help on this
    Tags: None
    • Nick's Tvs
      Badcaps Veteran
      • Jan 2014
      • 621
      • USA
      #2
      Re: Tnpa5340 tnpa5341

      Anyone know anything about these buffers? Any help would be appreciated.

        Comment

        • tw2005
          Badcaps Legend
          • Oct 2011
          • 6458
          • Australia
          #3
          Re: Tnpa5340 tnpa5341

          open the manual, go to block diagram 4/4

          identify Vfo,VF5V, VSCN-F on sd,su. it gives the pin numbers at the connectors

          measure resistance -vfg for each

          Vfo usually will show short if the buffer has gone

          as far as repair, i'd get a pro to do it unless your really skilled and able to get those off as the tracks liftt and tear easy

          modus do buffers too

            Comment

            • Nick's Tvs
              Badcaps Veteran
              • Jan 2014
              • 621
              • USA
              #4
              Re: Tnpa5340 tnpa5341

              Yeah I am not that good with soldering, I don't trust myself with replacing one of those IC's
              but I just want to get an idea of which IC is bad and if both boards are affected or just one.
              Thanks for the tip.

                Comment

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