LG 50LA6230 backlight repairs

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  • chrismurphy
    Badcaps Veteran
    • May 2014
    • 251
    • australia
    #1

    LG 50LA6230 backlight repairs

    For everyone
    repaired this TV with faulty LED back-lights
    Removed the panel and diffuser and found one burnt LED
    removed the faulty LED and replaced with 5 diodes (5x .7 drop=3.5)
    tested each string ...all ok
    replaced diffuser and panel . TV now works and the missing LED had no effect on the picture .posted FYI
    Tags: None
    • RobbieC
      Member
      • Sep 2013
      • 26
      • UK
      #2
      Re: LG 50LA6230 backlight repairs

      I did the same thing but just shorted the LED. There is enough tolerance in the supply to allow for missing individual units (mine also had 8 failed led's too but had failed shorted so didn't take down the string).
      Ideally, long term fix is find suitable drop in repalcements (for one or all led's)

        Comment

        • chrismurphy
          Badcaps Veteran
          • May 2014
          • 251
          • australia
          #3
          Re: LG 50LA6230 backlight repairs

          cant short the LED on this one as they are all in series

            Comment

            • RobbieC
              Member
              • Sep 2013
              • 26
              • UK
              #4
              Re: LG 50LA6230 backlight repairs

              ? afaik all of the strings using in tv's are in series which is why the whole string dies if one goes open circuit. Would be some serious current if in parallel too!
              Shorting only works IF in series

                Comment

                • chrismurphy
                  Badcaps Veteran
                  • May 2014
                  • 251
                  • australia
                  #5
                  Re: LG 50LA6230 backlight repairs

                  yes my mistake ,replied to quick ,your right
                  The only reason i put the diodes in place of the LED is in this set there are two strings of LEDS and i wanted to keep the brightness of the strings as close as i could

                    Comment

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