Sony KDL-46w5810, t-con board F1 fuse open circuit

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  • jczarniak
    Senior Member
    • Oct 2015
    • 179
    • UK
    #1

    Sony KDL-46w5810, t-con board F1 fuse open circuit

    Hi,

    Original problem with the TV was 14 blinks code (faulty t-con)
    Checked the t-con and found blown fuse (F1 - 7 Amp)
    Replaced with 5 Amp, fuse OK.
    TV stays on, sound is working fine, backlight is ON but still no picture.
    Must be faulty t-con, fuse is fine now but not sure why blown before.
    What else should I check / change on the t-con to make it working.

    Thank you.
    Attached Files
    Tags: None
    • ReeceyBurger123
      Never Give Up !
      • May 2014
      • 7325
      • Britain
      #2
      Re: Sony KDL-46w5810, t-con board F1 fuse open circuit

      Something probably shorted which blew the fuse but got very hot and failed open so the fuse wont blow any more. Also do you know how to check for shorted components ?
      Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

      https://www.facebook.com/Telford-Tel...7894576335359/

        Comment

        • jczarniak
          Senior Member
          • Oct 2015
          • 179
          • UK
          #3
          Re: Sony KDL-46w5810, t-con board F1 fuse open circuit

          Originally posted by ReeceyBurger123
          Something probably shorted which blew the fuse but got very hot and failed open so the fuse wont blow any more. Also do you know how to check for shorted components ?
          Thank you.
          Yes, I'm checking using multimeter in diode mode.
          Can you suggest any components, please?

            Comment

            • ReeceyBurger123
              Never Give Up !
              • May 2014
              • 7325
              • Britain
              #4
              Re: Sony KDL-46w5810, t-con board F1 fuse open circuit

              Try the little Smd transistors and diodes on the board first. Also D116 I would check too as it looks like its lifted off the board ?
              Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

              https://www.facebook.com/Telford-Tel...7894576335359/

                Comment

                • jczarniak
                  Senior Member
                  • Oct 2015
                  • 179
                  • UK
                  #5
                  Re: Sony KDL-46w5810, t-con board F1 fuse open circuit

                  Originally posted by ReeceyBurger123
                  Try the little Smd transistors and diodes on the board first. Also D116 I would check too as it looks like its lifted off the board ?
                  D116 one leg has been desoldered by me to check the diode.
                  I checked some other diodes and transistors too, can't find anything.

                    Comment

                    • jczarniak
                      Senior Member
                      • Oct 2015
                      • 179
                      • UK
                      #6
                      Re: Sony KDL-46w5810, t-con board F1 fuse open circuit

                      4 small components on picture no 2:
                      CD222, CD221, CD220, CD249, are these capacitors?
                      Checking opposite ends in diode mode got closed circuit: 000
                      Is this as it should?

                        Comment

                        • jczarniak
                          Senior Member
                          • Oct 2015
                          • 179
                          • UK
                          #7
                          Re: Sony KDL-46w5810, t-con board F1 fuse open circuit

                          Closed circuit also measuring another 6 below.
                          Attached Files

                            Comment

                            • Th3_uN1Qu3
                              Believe in
                              • Jul 2010
                              • 6031
                              • Romania
                              #8
                              Re: Sony KDL-46w5810, t-con board F1 fuse open circuit

                              Remove all those caps, you are almost guaranteed to find one shorted.
                              Originally posted by PeteS in CA
                              Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                              A working TV? How boring!

                                Comment

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