Panasonic TC-P50U2 (No Power)

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  • saintlouis74
    Senior Member
    • Dec 2013
    • 102
    • USA
    #1

    Panasonic TC-P50U2 (No Power)

    Panasonic TC-P50U2

    A Friend gave me this unit, don't know any history of it nor what happen before the unit malfunction.

    When I plug in the Power Coord, I don't hear any clicks, nor do I get any blinking lights on front panel(No Signs of Life). All I hear is a small humming/whining noise coming from T501..

    Checked all Pins, only Pin 1 on P7 has 5v, 0v on all other pins..

    Diode D359 seems to test bad in circuit,so i replaced it with a new one anyways.. still continuity both directions while in circuit

    Im young and still learning but when I do need help im very grateful for you guys here at badcaps.net always getting me out of a hair pulling situation Thanks!


    But I need help again, so if you guys can lead me to the next step I would appreciate it.
    Attached Files
    Last edited by saintlouis74; 12-01-2014, 12:59 AM.
    Tags: None
    • tw2005
      Badcaps Legend
      • Oct 2011
      • 6458
      • Australia
      #2
      Re: Panasonic TC-P50U2 (No Power)

      Originally posted by saintlouis74
      Panasonic TC-P50U2

      A Friend gave me this unit, don't know any history of it nor what happen before the unit malfunction.

      When I plug in the Power Coord, I don't hear any clicks, nor do I get any blinking lights on front panel(No Signs of Life). All I hear is a small humming/whining noise coming from T501..

      Checked all Pins, only Pin 1 on P7 has 5v, 0v on all other pins..

      Diode D359 seems to test bad in circuit,so i replaced it with a new one anyways.. still continuity both directions while in circuit

      Im young and still learning but when I do need help im very grateful for you guys here at badcaps.net always getting me out of a hair pulling situation Thanks!


      But I need help again, so if you guys can lead me to the next step I would appreciate it.
      Do you have the service manual? D359 sits across a winding on a transformer so will always show short, I can tell you that much at this stage.
      Attached Files
      Last edited by tw2005; 12-01-2014, 04:03 AM.

        Comment

        • tw2005
          Badcaps Legend
          • Oct 2011
          • 6458
          • Australia
          #3
          Re: Panasonic TC-P50U2 (No Power)

          From the 42" training guide
          Check the SD card slot for metal objects. Check also for bended pins. Make sure that connector P6 on the P board is properly connected.
          Check all the connections between the P board and the A board. Make sure P7/A7 is properly seated.

          going with your info and the guide, you have no relay clicks

          Is there
          approx. 3.2V at pin 5 of connector P7 on
          the P board when the power button is
          pressed?

          Yes = P board
          No = A board because you have already confirmed the 5V

            Comment

            • saintlouis74
              Senior Member
              • Dec 2013
              • 102
              • USA
              #4
              Re: Panasonic TC-P50U2 (No Power)

              Originally posted by tw2005
              From the 42" training guide
              Check the SD card slot for metal objects. Check also for bended pins. Make sure that connector P6 on the P board is properly connected.
              Check all the connections between the P board and the A board. Make sure P7/A7 is properly seated.

              going with your info and the guide, you have no relay clicks

              Is there
              approx. 3.2V at pin 5 of connector P7 on
              the P board when the power button is
              pressed?

              Yes = P board
              No = A board because you have already confirmed the 5V


              ok pin 5 on P7 has 0V when I press Power button..... so therefor all signs are looking like a fault Main board?
              Last edited by saintlouis74; 12-01-2014, 12:39 PM.

                Comment

                • tw2005
                  Badcaps Legend
                  • Oct 2011
                  • 6458
                  • Australia
                  #5
                  Re: Panasonic TC-P50U2 (No Power)

                  I would say so, if nothing obvious shorting the 3.3V like a coin stuck in the SD slot or something. usually no clicks, no LED ia a dead main board

                    Comment

                    • saintlouis74
                      Senior Member
                      • Dec 2013
                      • 102
                      • USA
                      #6
                      Re: Panasonic TC-P50U2 (No Power)

                      Originally posted by tw2005
                      I would say so, if nothing obvious shorting the 3.3V like a coin stuck in the SD slot or something. usually no clicks, no LED ia a dead main board
                      Ok Thanx

                        Comment

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