Old DELL Power supply H255E-01 - bad IC106 & R148

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  • bajdik
    Senior Member
    • Aug 2015
    • 68
    • Czech Republic
    #1

    Old DELL Power supply H255E-01 - bad IC106 & R148

    Hello,
    I have one bad power supply for repair old Dell Desktop PC.
    Model of the power supply is H255E-01 for Dell Optiplex 760.

    It looks that controller IC106 is done. I can not read anything on this IC. Is someone who have a schematic for it? Resistor near the IC is bad too. It is R148 - i need to identify it too. Everything else looks OK, mosfets and fuse is OK. I would like to try fix it.
    Tags: None
    • kasfamily
      Badcaps Veteran
      • Aug 2014
      • 774
      • Russia
      #2
      Re: Old DELL Power supply H255E-01 - bad IC106 & R148

      Show a photo of the power supply board on both sides

        Comment

        • bajdik
          Senior Member
          • Aug 2015
          • 68
          • Czech Republic
          #3
          Re: Old DELL Power supply H255E-01 - bad IC106 & R148

          Pictures.
          Attached Files

            Comment

            • lotas
              Badcaps Legend
              • Jan 2016
              • 4784
              • Russia
              #4
              Re: Old DELL Power supply H255E-01 - bad IC106 & R148

              Ic106 - tny278pn - tny280pn
              Attached Files

                Comment

                • bajdik
                  Senior Member
                  • Aug 2015
                  • 68
                  • Czech Republic
                  #5
                  Re: Old DELL Power supply H255E-01 - bad IC106 & R148

                  Thank you very much. What do you think about the resistor?

                    Comment

                    • bajdik
                      Senior Member
                      • Aug 2015
                      • 68
                      • Czech Republic
                      #6
                      Re: Old DELL Power supply H255E-01 - bad IC106 & R148

                      Anyone can help me, please? Maybe, someone can have it in a scrap Thank you.

                        Comment

                        • kasfamily
                          Badcaps Veteran
                          • Aug 2014
                          • 774
                          • Russia
                          #7
                          Re: Old DELL Power supply H255E-01 - bad IC106 & R148

                          See what this resistor is connected to on the other side of the board

                            Comment

                            • Quality
                              New Member
                              • Mar 2017
                              • 2
                              • Iran
                              #8
                              Re: Old DELL Power supply H255E-01 - bad IC106 & R148

                              R148 is 0.5 ohm resistor
                              Attached Files
                              Last edited by Quality; 09-03-2022, 05:20 AM.

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