Samsung LA26R71WD

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  • Amraks
    Badcaps Veteran
    • Nov 2011
    • 724
    • Australia

    #1

    Samsung LA26R71WD

    Hey I have this tv here it has no sound.
    I am wondering what is going on with it as the head phone jack produces sound.
    the optical plug has a light.
    Power board: BN96-03058A
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Samsung LA26R71WD

    Check with only one speaker at a time? In case one is shorted.
    For most audio debugging a scope is incredibly useful.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • Amraks
      Badcaps Veteran
      • Nov 2011
      • 724
      • Australia

      #3
      Re: Samsung LA26R71WD

      Hey tom no scope here.

      Did as you said, still no sound.

      Also would like to note that tv has lines going thru it.

      Seems to be on the board that has pink and white cables coming out of it.
      also its intermited which indicates dry solder joints. as when I put the hair dryer switch to cold onto it the lines come back.

      But that's easily fixed, I am wondering how come it has no sound..

      Comment

      • Amraks
        Badcaps Veteran
        • Nov 2011
        • 724
        • Australia

        #4
        Re: Samsung LA26R71WD

        worked the screen problem looks like its the ribbon cables to the screen.
        as when push on the bezzle, I can create the problem.

        but its this sound issue that has me, I am stuck I want to get this fixed before moving onto fixing the picture.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: Samsung LA26R71WD

          Can you post a picture of the main board please.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: Samsung LA26R71WD

            Also, check the 12V from PSU, there is a 13V and 12V rail on these I believe and 12V is for audio.
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • Amraks
              Badcaps Veteran
              • Nov 2011
              • 724
              • Australia

              #7
              Re: Samsung LA26R71WD

              As I only have my phone with camera its not very good at taking crystal clear photos, I have resorted to hunting down a good photo of the same board.

              Not sure which rail you are talking about. would that be the 4 wire rail?
              Attached Files

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Samsung LA26R71WD

                That is the power board, I want the main board, one with video inputs.
                Rail = electronics terminology = basically means voltage source shared by many devices.
                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                Comment

                • Amraks
                  Badcaps Veteran
                  • Nov 2011
                  • 724
                  • Australia

                  #9
                  Re: Samsung LA26R71WD

                  well tested the 12 volt rail and am only getting 2.5v

                  sorry didn't see you wrote main lol "silly me"

                  Will find a picture of board in question. Really need to get a better camera

                  Comment

                  • Amraks
                    Badcaps Veteran
                    • Nov 2011
                    • 724
                    • Australia

                    #10
                    Re: Samsung LA26R71WD

                    worked it out the rectifier on the power board was dry soldered.

                    sound works.

                    now I will try get past my flickering problems

                    Its Horizontal lines when you cold start it up, then it flickers at random for some reason...
                    Last edited by Amraks; 09-19-2013, 08:39 AM.

                    Comment

                    • Amraks
                      Badcaps Veteran
                      • Nov 2011
                      • 724
                      • Australia

                      #11
                      Re: Samsung LA26R71WD

                      Problem seems to be with inverter.

                      Dry solder joints?

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #12
                        Re: Samsung LA26R71WD

                        Horizontal lines, can we see a picture? Good job on audio fix.
                        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

                        • Amraks
                          Badcaps Veteran
                          • Nov 2011
                          • 724
                          • Australia

                          #13
                          Re: Samsung LA26R71WD

                          they are flashing lines bit hard to get a picture of them
                          certain distance apart shading the picture each bar.
                          Last edited by Amraks; 09-19-2013, 10:02 AM.

                          Comment

                          • Amraks
                            Badcaps Veteran
                            • Nov 2011
                            • 724
                            • Australia

                            #14
                            Re: Samsung LA26R71WD

                            Got the picture of the tv doing its problem.
                            Attached Files

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK

                              #15
                              Re: Samsung LA26R71WD

                              Looks like it could be panel - possibly tab bonds.
                              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                              Comment

                              • Amraks
                                Badcaps Veteran
                                • Nov 2011
                                • 724
                                • Australia

                                #16
                                Re: Samsung LA26R71WD

                                Picture does come right after awhile.

                                but when its cold it takes awhile for the symptoms to disappear.

                                how do I inspect these tab bonds?

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK

                                  #17
                                  Re: Samsung LA26R71WD

                                  You take the front plastic off and the metal frame off the panel.
                                  Here is one for top bonds though your fault may be the side bonds.
                                  http://www.youtube.com/watch?v=mMo3NBGLwH0
                                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                  Comment

                                  • Amraks
                                    Badcaps Veteran
                                    • Nov 2011
                                    • 724
                                    • Australia

                                    #18
                                    Re: Samsung LA26R71WD

                                    hey was that your video?

                                    If so good job.

                                    I don't see how it could be tab bonds being that these are horizontal and them tabs are connected to anything but the LCD panel.

                                    but unless its only a few loose ones that join on tab1 that goes to these horizontal tabs.

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK

                                      #19
                                      Re: Samsung LA26R71WD

                                      Yes, that's me.

                                      There are both tabs on top and side of panel.

                                      Top left bond could possibly cause this fault too.
                                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                      Comment

                                      • Amraks
                                        Badcaps Veteran
                                        • Nov 2011
                                        • 724
                                        • Australia

                                        #20
                                        Re: Samsung LA26R71WD

                                        winner winner chicken dinner lol.

                                        Yes I think you are right just had the panel off for a hour and flexing that top left does recreate problem.

                                        now suggestions on what is a good material to use as a shim.

                                        Comment

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