Philips 42PFL9632D10 - no picture!

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  • sihi77
    New Member
    • Jun 2013
    • 6
    • Eesti
    #1

    Philips 42PFL9632D10 - no picture!

    I have quite similar symptom to the thread https://www.badcaps.net/forum/showthread.php?t=29403 case. After turning TV on picture&sound appear. But only for appr 2 sec! Then the picture fades out, the sound is ok. Together with picture fade out also all backlit lamps. Both inverters seem ok, no damages. Replacing backlit lamps by exterior CFL (connecting to the inverter output) then master inverter ligts the lamp, slave inverter not. Trying to light the backlit lamps from exterior source does not give any result.
    I am thinking that the backlit lamps are bad, at least one of these.
    Please your thoughts!
    BTW, if I'm right how to open the LCD panel in order to check tube by tybe?
    Tags: None
    • Dgtech
      E. Technician
      • Apr 2009
      • 1462
      • Steeler
      #2
      Re: Philips 42PFL9632D10 - no picture!

      Check the resistances across the fets of the slave inverter board.
      The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

        Comment

        • sihi77
          New Member
          • Jun 2013
          • 6
          • Eesti
          #3
          Re: Philips 42PFL9632D10 - no picture!

          All lamps are OK. Finally I had success to open the panel.
          Checking voltage on the slave inverter parts transistor (SQ8) seems "strange". Voltage on it contacts turnes from 12V to almost 0 in this vain like the picture fades out. Every time!
          Bad slave inverter? Or both: master + slave?

            Comment

            • Dgtech
              E. Technician
              • Apr 2009
              • 1462
              • Steeler
              #4
              Re: Philips 42PFL9632D10 - no picture!

              Post pics of the inverter boards. I will show you what I meant. All resistance checks should be done with the power off. This may be a power supply problem.
              The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

                Comment

                • sihi77
                  New Member
                  • Jun 2013
                  • 6
                  • Eesti
                  #5
                  Re: Philips 42PFL9632D10 - no picture!

                  I am not sure to take better picture, then I use from online as my slave board corresponds 1:1 to this one. As I told on the SQ8 legs voltage falls from 12V to 2...3V within 2 sec appr and picture fades out.
                  Attached Files

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                    Comment

                    • sihi77
                      New Member
                      • Jun 2013
                      • 6
                      • Eesti
                      #6
                      Re: Philips 42PFL9632D10 - no picture!

                      I am glad to inform that my TV is back alive again. The inverter board (6632L-0471A) was faulty. Thanks to Dönberg Electonics Ltd help it was replaced quickly.

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