Am I reading this right? (help?)

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  • Mad_Professor
    A Mech Warrior
    • Feb 2011
    • 1587
    #1

    Am I reading this right? (help?)

    So I got a 42" Philips, (42PFL7422D/37) doesn't turn on, throws a blink code of six follow by three fast blinks. Either it's error code 6 or error code 63, I can't tell.

    Anyways probing around the board, it appears pin 8 of connector 1P11 doesn't have 12v, now reading the photo below I want to assume 12v is coming from the DC-DC, is this correct?

    if so then I'm not getting any voltage as far back as 5011 transformer for either 12 or 24v.

    I also hear the relay click and have +5V2 at pin 7 of 1P11 and 3.7v at pin 6 which engages the relay.

    no voltage at pin 2 (Power-Good)

    Also how can I test for 400v_HOT at the transformers to make sure they are getting power?

    datasheet for the TV.
    Attached Files
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30977
      • Albion
      #2
      Re: Am I reading this right? (help?)

      what a train-wreck of a psu - it looks like the crap samsung comes up with!

      scope the primary transformer pins - with 600v+ probes!
      or check the high and low side fet's for shorts (page 59)
      if they arent shorted try replacing the opto isolator & current source lm431.
      they dont call it an lm431 - but that's it's generic part number.

        Comment

        • Mad_Professor
          A Mech Warrior
          • Feb 2011
          • 1587
          #3
          Re: Am I reading this right? (help?)

          Well it's better than nothing.

          I'm a noob but where are you seeing current source lm431? I know it's not named like that but where are you seeing it? is it on p59 or another page? I'm looking for the symbols but I don't see it.

          Also which opto isolator there's 7002 on p59 and 7307 on p58. I think you meant 7307, I'll look into it.

          I'll check the fets tomorrow since I spent most of tonight on two other tv's beside this one, I'm really tired.

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30977
              • Albion
              #4
              Re: Am I reading this right? (help?)

              follow the optoisolator led pins - it's halfway down on the right and looks like a zener diode in a box with 3 legs.

                Comment

                • Mad_Professor
                  A Mech Warrior
                  • Feb 2011
                  • 1587
                  #5
                  Re: Am I reading this right? (help?)

                  ah, you're talking about 7010 (TS2431.) I thought that as a box with a diode in it, I'm really tired.

                  Thank you, I'll take closer look at these and check the transformers tomorrow.

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA
                      #6
                      Re: Am I reading this right? (help?)

                      I think you should move this thread to TV section.
                      See my notes on second page of the PDF.
                      Attached Files
                      Never stop learning
                      Basic LCD TV and Monitor troubleshooting guides.
                      http://www.badcaps.net/forum/showthr...956#post305956

                      Voltage Regulator (LDO) testing:
                      http://www.badcaps.net/forum/showthr...999#post300999

                      Inverter testing using old CFL:
                      http://www.badcaps.net/forum/showthr...er+testing+cfl

                      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                      http://s807.photobucket.com/user/budm/library/

                      TV Factory reset codes listing:
                      http://www.badcaps.net/forum/showthread.php?t=24809

                        Comment

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