JVC LT50C-550 backlight issue

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  • Bloopeta
    Badcaps Veteran
    • Jun 2018
    • 526
    • United Kingdom
    #1

    JVC LT50C-550 backlight issue

    I have a JVC LT50C-550

    When switched on, it flashes on for a brief second as if backlights are at fault. I have stripped down and tested LEDs and all are fine, can illuminate the array no problem with tester.

    All caps look ok by sight.

    Any help as where to go next grately appreciated
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    • dick_barton
      Badcaps Legend
      • Aug 2015
      • 6642
      • Wales
      #2
      Re: JVC LT50C-550 backlight issue

      Although the tester is useful it does not pass a high enough current to fully test the strips.
      They may well show good at 30 - 40mA testing current, but fail when running at higher currents.

      I can't quite make it out but does it say 800mA led current on the power supply board?
      Last edited by dick_barton; 06-15-2021, 08:28 AM.
      Willing to help but I'm no expert.

        Comment

        • Bloopeta
          Badcaps Veteran
          • Jun 2018
          • 526
          • United Kingdom
          #3
          Re: JVC LT50C-550 backlight issue

          Originally posted by dick_barton
          Although the tester is useful it does not pass a high enough current to fully test the strips.
          They may well show good at 30 - 40mA testing current, but fail when running at higher currents.

          I can't quite make it out but does it say 800mA led current on the power supply board?
          It does m8 yes, 800ma

            Comment

            • neilc6
              Badcaps Legend
              • Nov 2015
              • 1550
              • Canada
              #4
              Re: JVC LT50C-550 backlight issue

              Remove the panel and record the flash. Go frame by frame to see which strips are out. I would just replace all the strips with new.

                Comment

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