Samsung UE55F6800SB

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  • ronhayes
    TV Engineer
    • Mar 2014
    • 458
    • UK

    #41
    Re: Samsung UE55F6800SB

    Hi vince
    If you look at post 26 i removed both ribbons to the lcd panel and the set still goes off/on the only way it stays on is if the T-Con ribbon is pulled either from main board or T-Con.

    Comment

    • vinceroger69
      Badcaps Legend
      • Mar 2012
      • 6714
      • uk

      #42
      Re: Samsung UE55F6800SB

      sorry ron missed that post is the tcon a reasonable price? i would try one just too rule it out

      Comment

      • ronhayes
        TV Engineer
        • Mar 2014
        • 458
        • UK

        #43
        Re: Samsung UE55F6800SB

        Also when set is on for a short period it does display a good picture.?

        Comment

        • ronhayes
          TV Engineer
          • Mar 2014
          • 458
          • UK

          #44
          Re: Samsung UE55F6800SB

          I have only see one so far vince and that is £30.00 the main board cost £80.00 i am still looking to see if i can see any more.

          Comment

          • vinceroger69
            Badcaps Legend
            • Mar 2012
            • 6714
            • uk

            #45
            Re: Samsung UE55F6800SB

            Originally posted by ronhayes
            Also when set is on for a short period it does display a good picture.?
            so your saying if you leave the set on while its power cycling by itself a picture does appear does the set set on or always power cycling?

            Comment

            • ronhayes
              TV Engineer
              • Mar 2014
              • 458
              • UK

              #46
              Re: Samsung UE55F6800SB

              I am looking at UE boards for Samsung on Ebay i am on page 78 at the moment and only seen one and it is off emos and they are covering half the picture. If all fails i will send them a message for a clear picture ?

              Comment

              • ronhayes
                TV Engineer
                • Mar 2014
                • 458
                • UK

                #47
                Re: Samsung UE55F6800SB

                The place i am looking is (Samsung Ue in TV Boards, parts &components ) it is on page 71.

                Comment

                • ronhayes
                  TV Engineer
                  • Mar 2014
                  • 458
                  • UK

                  #48
                  Re: Samsung UE55F6800SB

                  Here is a video of the picture while it is switching off/on and of the rear where you can see the T-Con .
                  The picture was better than this Yesterday when it was up the right way and with the outer frame on.
                  Hope this works as i have not added a video before ?

                  Can't seem to attach this video do you know how i can ?

                  Comment

                  • zomi
                    Badcaps Veteran
                    • Nov 2011
                    • 505

                    #49
                    Re: Samsung UE55F6800SB

                    There is one on for £24

                    It could still be the main board..

                    Will wait for others to give feedback

                    Comment

                    • ronhayes
                      TV Engineer
                      • Mar 2014
                      • 458
                      • UK

                      #50
                      Re: Samsung UE55F6800SB

                      Thank you zomi
                      I have seen one for £18.00.
                      Do you know how I can add a video to post as this might give more clues.

                      Comment

                      • vinceroger69
                        Badcaps Legend
                        • Mar 2012
                        • 6714
                        • uk

                        #51
                        Re: Samsung UE55F6800SB

                        Originally posted by ronhayes
                        Thank you zomi
                        I have seen one for £18.00.
                        Do you know how I can add a video to post as this might give more clues.
                        ron have you got a youtube account if so you can copy the video link and paste it into this thread

                        Comment

                        • ronhayes
                          TV Engineer
                          • Mar 2014
                          • 458
                          • UK

                          #52
                          Re: Samsung UE55F6800SB

                          No I haven't vince but I will see if i can create one in a while

                          Comment

                          • megaraider
                            Badcaps Veteran
                            • Jul 2015
                            • 307
                            • Portugal

                            #53
                            Re: Samsung UE55F6800SB

                            Originally posted by ronhayes
                            I have added a more clear picture of the P/S board and i have changed the cap mentioned but on testing when removed it reads ok.
                            The bump on the top was a clear defective hint, measuring it without any load is not full proof (if it failed the test then bad for sure, but the other way around isn't always true).

                            Have you measure the power rails voltages?
                            I'm quite sure one, or more, are faulty when in load.
                            As mentioned before pay special attention to fast decays in voltage power rail levels when the unit goes from OFF to ON (Use an analog multimeter or an oscilloscope).

                            Comment

                            • ronhayes
                              TV Engineer
                              • Mar 2014
                              • 458
                              • UK

                              #54
                              Re: Samsung UE55F6800SB

                              Hope this works.
                              The picture was better quality when it was on its stand and with outer casing on.

                              https://youtu.be/QVlZxXMVn9Q

                              Comment

                              • ronhayes
                                TV Engineer
                                • Mar 2014
                                • 458
                                • UK

                                #55
                                Re: Samsung UE55F6800SB

                                If any one can tell me what they think ?
                                But i am thinking it is the T-Con board that maybe at fault.

                                I do appreciate what Zombi is saying that it looks like a main board issue . But what i do find strange is that a replacement main board is giving the exact same fault , surely there are many faults that can happen but the exact same fault !! I am not convinced.

                                Comment

                                • ronhayes
                                  TV Engineer
                                  • Mar 2014
                                  • 458
                                  • UK

                                  #56
                                  Re: Samsung UE55F6800SB

                                  megaraider
                                  I have not used my analog meter in a long time ?
                                  And my oscilloscope is a really old one not sure if it still works ?
                                  Last edited by ronhayes; 09-27-2018, 12:13 PM.

                                  Comment

                                  • vinceroger69
                                    Badcaps Legend
                                    • Mar 2012
                                    • 6714
                                    • uk

                                    #57
                                    Re: Samsung UE55F6800SB

                                    Originally posted by ronhayes
                                    Hope this works.
                                    The picture was better quality when it was on its stand and with outer casing on.

                                    https://youtu.be/QVlZxXMVn9Q
                                    ron the youtube link isnt working just says video unavailable?

                                    Comment

                                    • ronhayes
                                      TV Engineer
                                      • Mar 2014
                                      • 458
                                      • UK

                                      #58
                                      Re: Samsung UE55F6800SB

                                      Vince
                                      I have just clicked on it in the post and it opens and plays for me ?

                                      Comment

                                      • vinceroger69
                                        Badcaps Legend
                                        • Mar 2012
                                        • 6714
                                        • uk

                                        #59
                                        Re: Samsung UE55F6800SB

                                        check the settings and make sure its set to public as you may have it set so only you can view it.
                                        Attached Files
                                        Last edited by vinceroger69; 09-27-2018, 12:39 PM.

                                        Comment

                                        • ronhayes
                                          TV Engineer
                                          • Mar 2014
                                          • 458
                                          • UK

                                          #60
                                          Re: Samsung UE55F6800SB

                                          See if that works Vince.
                                          https://youtu.be/QVlZxXMVn9Q

                                          Comment

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