Samsung HPS5053 bad Y-main board

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  • WHaThEFLuX
    Badcaps Veteran
    • Feb 2015
    • 277
    • USA
    #1

    Samsung HPS5053 bad Y-main board

    Acquired another monster plasma the other day, it was sitting on the side of the road getting nice and soaked in the rain, for a 100 lb. set this thing seemed to weigh double, must have been all the water weight!

    Anyway, after tearing the whole thing apart and cleaning/drying every inch of it, I powered her up and everything seemed to work except for the video, so that got me thinking that the Y-main/buffers were a good place to start.

    I checked the all too common FETS that usually blow but they're ok, in fact the only components on the board that are obviously bad are 4 zener diodes that I assume control the lower buffer board:




    I can't find the specs of these diodes anywhere, but a youtube video where someone tests them leads me to believe that they're 36V: (the test occurs around 6:15)

    https://www.youtube.com/watch?v=R5mYKAgMoB4


    A post in another thread on here claims that they're 30V, if anyone has any insight on the specs of these things I'd love to hear it!
    "You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."

    -retiredcaps
    Tags: None
    • ReeceyBurger123
      Never Give Up !
      • May 2014
      • 7325
      • Britain
      #2
      Re: Samsung HPS5053 bad Y-main board

      Hi mate, you can use 1N4753A diodes for that, they are 36v 1W. Please be sure that you replace all 8 at the same time if not the ones that you didnt replace will fail soon.
      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

        • WHaThEFLuX
          Badcaps Veteran
          • Feb 2015
          • 277
          • USA
          #3
          Re: Samsung HPS5053 bad Y-main board

          Reecey, thanks for the info, I really appreciate it, you're the man!
          "You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."

          -retiredcaps

            Comment

            • WHaThEFLuX
              Badcaps Veteran
              • Feb 2015
              • 277
              • USA
              #4
              Re: Samsung HPS5053 bad Y-main board

              While we're on the subject of identifying components, do you have any idea what these are?





              I believe they're inductor coils, they measure ~22 ohms, I just have no clue how to go about finding them online, are there any other measurements I can take that might help me figure it out?
              "You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."

              -retiredcaps

                Comment

                • WHaThEFLuX
                  Badcaps Veteran
                  • Feb 2015
                  • 277
                  • USA
                  #5
                  Re: Samsung HPS5053 bad Y-main board

                  bump, any ideas?
                  "You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."

                  -retiredcaps

                    Comment

                    • WHaThEFLuX
                      Badcaps Veteran
                      • Feb 2015
                      • 277
                      • USA
                      #6
                      Re: Samsung HPS5053 bad Y-main board

                      I assume I need a meter that measures inductance?
                      "You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."

                      -retiredcaps

                        Comment

                        • WHaThEFLuX
                          Badcaps Veteran
                          • Feb 2015
                          • 277
                          • USA
                          #7
                          Re: Samsung HPS5053 bad Y-main board

                          bump
                          "You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."

                          -retiredcaps

                            Comment

                            • ReeceyBurger123
                              Never Give Up !
                              • May 2014
                              • 7325
                              • Britain
                              #8
                              Re: Samsung HPS5053 bad Y-main board

                              They are inductors they are fine bud.
                              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

                                • WHaThEFLuX
                                  Badcaps Veteran
                                  • Feb 2015
                                  • 277
                                  • USA
                                  #9
                                  Re: Samsung HPS5053 bad Y-main board

                                  haha I'm aware of that, however I have another board with those inductors missing and need to know their values so I can replace them, I'm guessing I need a LCR meter?
                                  Last edited by WHaThEFLuX; 10-09-2016, 05:49 PM.
                                  "You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."

                                  -retiredcaps

                                    Comment

                                    • ReeceyBurger123
                                      Never Give Up !
                                      • May 2014
                                      • 7325
                                      • Britain
                                      #10
                                      Re: Samsung HPS5053 bad Y-main board

                                      Any update on the set ?
                                      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

                                        • WHaThEFLuX
                                          Badcaps Veteran
                                          • Feb 2015
                                          • 277
                                          • USA
                                          #11
                                          Re: Samsung HPS5053 bad Y-main board

                                          My apologies for never updating this thread, replacing those 4 bad diodes on the lower buffer brought the screen to life and I replaced the other 4 on the upper buffer as well for good measure!

                                          Interestingly enough this is the set I lent to my father-in-law to use while I wait for the y buffer to arrive to hopefully fix his Samsung from my other thread.

                                          He's been using it heavily for about 2 weeks now and he says that the set will randomly lose sound, as a shot in the dark I'd say maybe the main board is on it's way out but without actually having my hands on it I won't jump to any conclusions just yet.
                                          "You can only learn so much doing simple recapping and fixes. Ideally you want a really hard one to fix where you end up with a lot of dead ends and frustration. Then, and only then, do you learn how things really work."

                                          -retiredcaps

                                            Comment

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