Samsung Power Supply Board BN44-00150A

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  • ikmpch
    Member
    • Jul 2020
    • 22
    • Canada
    #1

    Samsung Power Supply Board BN44-00150A

    Hi,
    There is a diode (DS 805) on the secondary side. Can anyone tell me what are the specs for this diode? It is a shotkey diode as the name tells it. Where to purchase it?
    Thanks.
    Tags: None
    • petehall347
      Badcaps Legend
      • Jan 2015
      • 4426
      • United Kingdom
      #2
      Re: Samsung Power Supply Board BN44-00150A

      what is written on the diode ?

        Comment

        • R_J
          Badcaps Legend
          • Jun 2012
          • 9535
          • Canada
          #3
          Re: Samsung Power Supply Board BN44-00150A

          DS805 is likely ok, it is across the relay coil. This is likely not the problem with the power supply. Post the problem you are having with the power supply.
          Post pictures of the board, it is likely bad capacitors in the secondary
          Last edited by R_J; 09-19-2021, 06:55 PM.

            Comment

            • ikmpch
              Member
              • Jul 2020
              • 22
              • Canada
              #4
              Re: Samsung Power Supply Board BN44-00150A

              The diode seemed shorted so I tested the diode out of circuit and it was fine. Later I misplaced the little diode and can't find it so I have to get it's replacement. I guess it's a fast switching diode and operating voltage of 200 should be fine. Any comments?

                Comment

                • petehall347
                  Badcaps Legend
                  • Jan 2015
                  • 4426
                  • United Kingdom
                  #5
                  Re: Samsung Power Supply Board BN44-00150A

                  1n4148 or similar for the snubber diode .

                    Comment

                    • R_J
                      Badcaps Legend
                      • Jun 2012
                      • 9535
                      • Canada
                      #6
                      Re: Samsung Power Supply Board BN44-00150A

                      I suspect the original was a UF4007 based on a similar schematic

                        Comment

                        • ikmpch
                          Member
                          • Jul 2020
                          • 22
                          • Canada
                          #7
                          Re: Samsung Power Supply Board BN44-00150A

                          Thanks Petehall347 and R_J for your help.

                            Comment

                            • msh493
                              New Member
                              • Nov 2021
                              • 1
                              • Canada
                              #8
                              Re: Samsung Power Supply Board BN44-00150A

                              Hi Folks, This power supply was making a clicking sound and taking a long time to start. I looked it up and apparently it's a buch of bad capacitors. There are 13 of them, all high temp, 4 of each of 47 mf, 1000 mf at 25v, and 1000 mf at 10v. I don't see any other caps or components suffering from heat. Is there anything else I should check before I start taking them out and replacing them? Thanks in advance for replies.

                                Comment

                                • sam_sam_sam
                                  Badcaps Legend
                                  • Jul 2011
                                  • 6033
                                  • USA
                                  #9
                                  Re: Samsung Power Supply Board BN44-00150A

                                  I would recommend replacing all capacitors under 100uf in value because they have a tendency to dry out of electrolyte and cause all kinds of issues and if you have an ESR capacitor tester I would probably check all of the other capacitors on the switching power supply section of the board at a minimum
                                  Last edited by sam_sam_sam; 11-19-2021, 09:26 AM.

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