Daewoo DLV_32C7SMB Defective backlight

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  • dkneyle
    Badcaps Veteran
    • Dec 2013
    • 441
    • Australia
    #1

    Daewoo DLV_32C7SMB Defective backlight

    Have confirmed that the inverter is putting out juice (connected a small fluro tube from a hand lantern across the output and it lights OK).
    I've never delved into the CCFL tubes of a panel so I decided I've got nothing to lose - it only cost me $25 and if I get it going it will be an OK TV.
    The panel is a type LTA320WT-LF2; a Samsung I gather.
    So how are the tubes wired in these? I gather it must be in series if one tube has taken out the whole lot? Any advice regards what I should be looking for as I dismantle this unit?
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30906
      • Albion
      #2
      Re: Daewoo DLV_32C7SMB Defective backlight

      if that's 32inch then the back probably comes off for parallel backlights.
      only one tube needs to be screwed for the invertor to shutdown.

      got a foto of the invertor?

        Comment

        • dkneyle
          Badcaps Veteran
          • Dec 2013
          • 441
          • Australia
          #3
          Re: Daewoo DLV_32C7SMB Defective backlight

          I've stripped the panel from the rest of the hardware, but I've never done one of these before and I think I've come at it the wrong way around. I came aat it from the front and had separated the LCD panel and then the laminations under that and then I could see some sort of diffuser for the lamps. So I've put that all back to avoid contamination of the screen. Is there some secret I'm missing?
          Attached Files

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30906
              • Albion
              #4
              Re: Daewoo DLV_32C7SMB Defective backlight

              on looking at the invertor i'm not sure now
              is the panel edge-lit from the top & bottom?

                Comment

                • dkneyle
                  Badcaps Veteran
                  • Dec 2013
                  • 441
                  • Australia
                  #5
                  Re: Daewoo DLV_32C7SMB Defective backlight

                  Don't worry STJ. Looks like it's a write off. This panel appears to use tubes that are integrated into a plastic envelope. No access to individual tubes. Picture attached.
                  Time to scrap out the useful boards!
                  Attached Files

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 30906
                      • Albion
                      #6
                      Re: Daewoo DLV_32C7SMB Defective backlight

                      i suspect you can strip that.

                      why not experiment with 12v led strips - the type that comes on reels!

                        Comment

                        • dkneyle
                          Badcaps Veteran
                          • Dec 2013
                          • 441
                          • Australia
                          #7
                          Re: Daewoo DLV_32C7SMB Defective backlight

                          Yes, you are probably right. It would have been a very good experiment. Before I saw your suggestion I'd already stripped it and dumped it. Only so much space in my garage! But if I have the same situation again I think I would give it a go.

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