Philips 32PFL1335 No LED Backlight

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  • mugunthans
    Member
    • Dec 2016
    • 32
    • Canada
    #1

    Philips 32PFL1335 No LED Backlight

    The issue just pop-up while running normally... all of a sudden display went off... but still sound works... used a flash light and could see picture so Panel / TCON status is Good also I open the Panel and tested each LED and all Good. so issue should be with in LED driver.

    Philips 32PFL1335 (LG panel K320WD2)
    I have attached the picture of boards and SCH from chinese version.
    DMM reading
    Vin - 5v
    EN - 3.3v
    VLED+ 13v
    Gate - 0v
    CS - 0v
    EC10 - 13v
    D10 - 13v
    Q3 - Source - 13v
    Q3 - Gate - 0v
    Q3 - drain - 0v

    can someone help please.
    Attached Files
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Philips 32PFL1335 No LED Backlight

      1) TV OFF, leaving all the connectors in place.
      2) Put the DC Volt meter probes on the two legs of the cap EC10.
      3) Turn on the TV and look at the meter to see how high the Voltage jumps up to before it goes back down to 13V.
      4) We also need the pictures of the whole back side of the TV showing all the boards and how they are connected together.
      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

        • mugunthans
          Member
          • Dec 2016
          • 32
          • Canada
          #3
          Re: Philips 32PFL1335 No LED Backlight

          EC10 reading jumps upto 15v and back to 13v. Full read picture attached.
          Attached Files

            Comment

            • mugunthans
              Member
              • Dec 2016
              • 32
              • Canada
              #4
              Re: Philips 32PFL1335 No LED Backlight

              i'm thinking to add LED driver board...any recommendation please...
              Attached Files

                Comment

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