TNPA 5335 not completely repaired?

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  • gldiana
    Member
    • Sep 2017
    • 16
    • Italy
    #1

    TNPA 5335 not completely repaired?

    I had tx-p50gt30 tv, with 6 blinks... Measured >200V on C631, then changed the two DG302 (Q441 Q442) and their drivers IC502 and 531. Then voltage across C631 dropped to zero.. Then changed other two DGs and drivers IC522 and 551..but nothing changes. All parts taken from a working SS board. Both 15V and 5V are there, and Vsus rises to 204V (that should be ok). After this, still 6 blinks!! After having checked all diodes and resistors of recovery section, I changed the IC16562 and the board started to work!!
    But I had a bad surprise: now tv switches on, with green led steadly on, but the sceen remains black. Calling an osd seems that some "falling snow" appear, but barely visible... I switched the a-board with another I have available, but no results. Do you have any suggestion?? Could it be the plasma panel itself faulty? Or maybe the 5335 have still other faults even if the tv switches on without any red led blinking? Thank you in advance...
    Tags: None
    • gldiana
      Member
      • Sep 2017
      • 16
      • Italy
      #2
      Re: TNPA 5335 not completely repaired?

      A quick update: I've measured Vsus 214V, VAD 65V, Vscn -132V , all measures taken with tester on DCV and the negative probe on the panel metal surface.

      Are there fine or not?

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        • gldiana
          Member
          • Sep 2017
          • 16
          • Italy
          #3
          Re: TNPA 5335 not completely repaired?

          Is there anybody that can confirm if these values are fine or not?

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            • tvtimmy
              Badcaps Legend
              • Mar 2015
              • 1160
              • usa
              #4
              Re: TNPA 5335 not completely repaired?

              If you had some pics of all the parts inside the tv, and one of all of them together, we could see the label on the back of the tv, where the boards are mounted to. It tells the voltages.

                Comment

                • tw2005
                  Badcaps Legend
                  • Oct 2011
                  • 6458
                  • Australia
                  #5
                  Re: TNPA 5335 not completely repaired?

                  I've read your threads, don't know what to say. Little to go on . I don't understand this repair sounds like it's not the normal failure. Don't read much on DG302 replacement, some picturs of the board and in particular components touched or replaced. Can you give the part numbers of the driver ICs now installed.

                  are there any open cct gate resistors associated with the area of failure?

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