Sharp aquos lc-60le741e

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  • sordids999
    Badcaps Legend
    • May 2013
    • 2149
    • uk
    #1

    Sharp aquos lc-60le741e

    Hello

    got this tv today picture is perfect then once the tv warms up after 10 minutes you have a loud and i mean loud screeching noise which im thinking is the speakers and the pictures will then go off

    has anyone come across this fault before ?

    uploading pictures as we speak

    thanks
    Last edited by sordids999; 10-24-2016, 06:32 AM.
    Tags: None
    • sordids999
      Badcaps Legend
      • May 2013
      • 2149
      • uk
      #2
      Re: Sharp aquos lc-60le741e

      pictures
      Attached Files

        Comment

        • dick_barton
          Badcaps Legend
          • Aug 2015
          • 6642
          • Wales
          #3
          Re: Sharp aquos lc-60le741e

          Can you monitor the audio supply and see if that is dropping possibly due to a fault either in the audio circuit or power supply itself.
          Willing to help but I'm no expert.

            Comment

            • sordids999
              Badcaps Legend
              • May 2013
              • 2149
              • uk
              #4
              Re: Sharp aquos lc-60le741e

              testing voltages now

                Comment

                • sordids999
                  Badcaps Legend
                  • May 2013
                  • 2149
                  • uk
                  #5
                  Re: Sharp aquos lc-60le741e

                  Does anyone have a schematic for this power supply i cant seem to find anything RUNTKA935WJQZ DPS-171CP A

                  update: its definitely the speakers thats making the loud noise sometimes it does that or just the backlights that switch off voltages on backlights start at 100 volts then drops to 62 volts but steady
                  Last edited by sordids999; 10-24-2016, 07:42 AM.

                    Comment

                    • sordids999
                      Badcaps Legend
                      • May 2013
                      • 2149
                      • uk
                      #6
                      Re: Sharp aquos lc-60le741e

                      update:
                      fingers crossed

                      reflowed the BGA and tv has been working over an hour now

                        Comment

                        • dick_barton
                          Badcaps Legend
                          • Aug 2015
                          • 6642
                          • Wales
                          #7
                          Re: Sharp aquos lc-60le741e

                          Hope the reflow is successful.
                          Willing to help but I'm no expert.

                            Comment

                            • sordids999
                              Badcaps Legend
                              • May 2013
                              • 2149
                              • uk
                              #8
                              Re: Sharp aquos lc-60le741e

                              I've got to be honest that's 6 I have done now and all still working mainly LG TVS
                              This is my first sharp though that's why I said fingers crossed

                                Comment

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