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Panasonic TC-P50U2 (No Power)

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    #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
    #2
    Re: Panasonic TC-P50U2 (No Power)

    Originally posted by saintlouis74 View Post
    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

      #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

        #4
        Re: Panasonic TC-P50U2 (No Power)

        Originally posted by tw2005 View Post
        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

          #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

            #6
            Re: Panasonic TC-P50U2 (No Power)

            Originally posted by tw2005 View Post
            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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