Panasonic TH-42PH9UK Power board failure

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  • 429moore
    New Member
    • Feb 2016
    • 3
    • USA
    #1

    Panasonic TH-42PH9UK Power board failure

    Hello,

    Yesterday my Panasonic Plasma display TH-42PH9UK died. Wouldn't show any power indication or standby lights.

    Found Power board (TNPA3911) has two blown T8HA input fuses. 8A 250V

    Also found the following defective components.
    Q406 - Transistor shorted
    R410 - Thermal fuse open
    D411 - Diode open each direction

    I see many repair kits available that include the fuses & Q406, R410. Problem is I cant find D411. The diode has red markings with T2D66 and I'm not sure how to cross reference.

    Does anyone have recommendations on where to obtain a service manual? Most online PDF downloads appear to be malicious.

    Regards
    Bob
    Tags: None
    • Alastair E
      Chief Womble
      • Mar 2013
      • 1963
      • U.K.
      #2
      Re: Panasonic TH-42PH9UK Power board failure

      There's a diode--That Doesnt read right--as you would expect--on many Panasonic PSU's...

      Its in fact a Diac--which is like two Zeners back to back...

      Try just with the other parts--I doubt that diac has suffered...
      TELEFIX

      How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
      http://www.irf.com/technical-info/appnotes/an-1088.pdf
      PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

        Comment

        • 429moore
          New Member
          • Feb 2016
          • 3
          • USA
          #3
          Re: Panasonic TH-42PH9UK Power board failure

          Ah now that would make sense! I will order the repair kit and hopefully all will be good! I really appreciate the feedback.

          Thank You
          Bob

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