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

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    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.

    #2
    Re: Old DELL Power supply H255E-01 - bad IC106 & R148

    Show a photo of the power supply board on both sides

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      #3
      Re: Old DELL Power supply H255E-01 - bad IC106 & R148

      Pictures.
      Attached Files

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        #4
        Re: Old DELL Power supply H255E-01 - bad IC106 & R148

        Ic106 - tny278pn - tny280pn
        Attached Files

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          #5
          Re: Old DELL Power supply H255E-01 - bad IC106 & R148

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

          Comment


            #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.

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              #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


                #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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