Samsung UA46C7000 tab bond flex burnt track

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  • phantom_zero
    Member
    • Mar 2015
    • 13
    • Philippines

    #1

    Samsung UA46C7000 tab bond flex burnt track

    I acquired this TV hoping I can still fix the defect. As you can see from the picture

    half of the screen has vertical bars. Bases from what I have seen from the forums here and elsewhere on the internet, it is causes by the faulty connection between the LCD and the flex or what is called the TAB BOND. And so I thought that maybe I could fix this one using the methods I read from the forums here which uses thin foam, tape, or thin silicon material in between the flex and frame to improve contact. Unfortunately, upon opening up the TV and inspecting the tabs I found that this TV has a different case. Its not just a simple loose contact problem. As you can see from the pictures (barely, sorry i dont have better camera for this)


    2 of the flex ribbons have burns. One or more tracks has been burnt off.

    Now I wanna ask the experts here. What do you think? Is this thing still fixable? Maybe scraping the insulation from the flex ribbon and soldering a thin wire to the board? The tracks are very thin though. How about replacing the flex ribbons? I've seen videos on youtube where they completely remove a flex ribbon from the LCD, clean the contacts and then reattach it using a machine.

    Many thanks in advance.
    Attached Files
  • dick_barton
    Badcaps Legend
    • Aug 2015
    • 6642
    • Wales

    #2
    Re: Samsung UA46C7000 tab bond flex burnt track

    If you have the money to buy a machine then go for it but I would say out's out of the price bracket of most people.

    I had a similar problem recently and by carefully cleaning the tab connections I got the picture back. Fortunately it was only gunk shorting across the copper tracks that was causing the problem and had not damaged the copper tracks.

    However it those tracks are burnt (cannot really tell from the picture) then I don't know how you can repair them.
    Last edited by dick_barton; 01-25-2017, 04:14 AM.
    Willing to help but I'm no expert.

    Comment

    • phantom_zero
      Member
      • Mar 2015
      • 13
      • Philippines

      #3
      Re: Samsung UA46C7000 tab bond flex burnt track

      Buying the machine wouldn't be practical. Buying a replacement panel would be cheaper but wouldn't that cost something close to the price of a new TV set. For now I'll to wait until I can think of a solution. Maybe look for a similar set with a good screen. Or try soldering a thin wire to bridge the contact to the board.

      I have observed that the tracks that were burnt off is the same pin number on the other one. I wonder what signal this is and why it caused the burn.

      I'll post again if i can pull this off.. Its a nice TV I dont wanna let go to waste.
      Last edited by phantom_zero; 01-25-2017, 05:20 AM.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Samsung UA46C7000 tab bond flex burnt track

        Is the tab bonding PCB at the bottom edge of the LCD panel?
        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

        • CapLeaker
          Leaking Member
          • Dec 2014
          • 7977
          • Canada

          #5
          Re: Samsung UA46C7000 tab bond flex burnt track

          Looks like there has been some water damage...

          Comment

          • kc8adu
            Super Moderator
            • Nov 2003
            • 8832
            • U.S.A!

            #6
            Re: Samsung UA46C7000 tab bond flex burnt track

            glass cleaner damage.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: Samsung UA46C7000 tab bond flex burnt track

              Originally posted by capleaker
              looks like there has been some water damage...
              +1
              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

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: Samsung UA46C7000 tab bond flex burnt track

                Originally posted by kc8adu
                glass cleaner damage.
                +1
                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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