What is this component

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  • EazyBone
    Badcaps Legend
    • Jun 2023
    • 1307
    • United states

    #1

    What is this component

    Shown in picture, trying to replace a MOSFET and looks like I knocked this off, in guessing it's the same as one next to it. Has 1.8 Mohms. Any way to bypass it? It's on the hot side

    The component circled is the one there, the arrow is I think another of same component?
    Last edited by EazyBone; 05-06-2024, 11:52 AM.
  • Davi.p
    Hobbist Tech
    • Sep 2009
    • 4287
    • Italy - Milan

    #2
    Protection diodes, them can be not populated, usualy are not present in power supplies, them are maybe of help to prevent damage to the board with a slight extra tension with no more energy than what the diodes can hold.. it's a 2cent gift from Samsung.. ahaha.. serious protections are another thing i guess..


    ​​

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    • EazyBone
      Badcaps Legend
      • Jun 2023
      • 1307
      • United states

      #3
      Originally posted by Davi.p
      Protection diodes, them can be not populated, usualy are not present in power supplies, them are maybe of help to prevent damage to the board with a slight extra tension with no more energy than what the diodes can hold.. it's a 2cent gift from Samsung.. ahaha.. serious protections are another thing i guess..


      ​​
      Okay, yea I can't find them on any other bad board I have. So would I be able to just jump this with some solder and it should probably work normal? Or should I put the same resistance there with a resistor instead? Kind of a cheap tv I'm messing around with.

      Comment

      • Davi.p
        Hobbist Tech
        • Sep 2009
        • 4287
        • Italy - Milan

        #4
        No must leave them open.circuit,.unpopulated

        Comment

        • Diah
          Badcaps Legend
          • Feb 2013
          • 6355
          • Germany

          #5
          F1K are fast recovery diode at range 500-1000V... no way to leave them open or shorted... other wise the whole hot area will exploded one by one.

          Comment

          • EazyBone
            Badcaps Legend
            • Jun 2023
            • 1307
            • United states

            #6
            Alright. Researching fast recovery diode and what that means. Just to make sure here. Wonder how I popped that off. Not even sure it belongs there, I'll check other boards.

            Only solution to replace it?

            Comment

            • lotas
              Badcaps Legend
              • Jan 2016
              • 4537
              • Russia

              #7
              Originally posted by Davi.p
              Protection diodes, them can be not populated, usualy are not present in power supplies, them are maybe of help to prevent damage to the board with a slight extra tension with no more energy than what the diodes can hold.. it's a 2cent gift from Samsung.. ahaha.. serious protections are another thing i guess..


              ​​
              Where did you get the idea that these are protective diodes, look at the diagram....
              Attached Files

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              • Diah
                Badcaps Legend
                • Feb 2013
                • 6355
                • Germany

                #8
                Originally posted by EazyBone
                Only solution to replace it?
                with same rate

                Comment

                • EazyBone
                  Badcaps Legend
                  • Jun 2023
                  • 1307
                  • United states

                  #9
                  Yea, can get one piece for $4 or $100 for $6 lol. Extra time. All good

                  Comment

                  • Davi.p
                    Hobbist Tech
                    • Sep 2009
                    • 4287
                    • Italy - Milan

                    #10
                    No, indeed i haven't noticed the cathode to the negative, so it's not protective but a strange solution. no idea what them means..

                    ​​

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