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    Corsair TX-750 problem with finding component

    Hello guys i have opened a dead Corsair psu and i found a burned ic with 7 pins. Because i can't find any schematics for this PSU ,I said to ask a question here. Thanks in advanced!
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    #2
    Re: Corsair TX-750 problem with finding component

    I have a Corsair CS750M and it uses a TNY278pn. Im not sure if its the same. Maybe you can check the datasheet and see if it fits.

    Usually, when those components explode, it means there is something in short...

    On the side of the big capacitor there is a resistor that seems to be broken. Did you checked that?

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      #3
      Re: Corsair TX-750 problem with finding component

      First of all thanks for the fast reply, i appreciate that! No i did not see that but i needed to find first the ic and then watch around the board for other component defects. Hmm you mean the little one next to the rectifier capacitor?(big one) do you know the value for this too?

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        #4
        Re: Corsair TX-750 problem with finding component

        victorcas Do you have a schematic diagram for your PSU?

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          #5
          Re: Corsair TX-750 problem with finding component

          The top of the ic was likely still in the case somewhere, did you check? Check the trace side of the board, if it is a TNY278pn, pins 5~8 (source) are connected together.
          Last edited by R_J; 11-06-2021, 06:04 PM.

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            #6
            Re: Corsair TX-750 problem with finding component

            IIRC, I have a later TX (TX850M) with much better cap choices.

            IIRC, that one doesn't look better than a later CX, cap-wise.
            Last edited by RJARRRPCGP; 11-07-2021, 01:11 AM.
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              #7
              Re: Corsair TX-750 problem with finding component

              Originally posted by johnis82 View Post
              First of all thanks for the fast reply, i appreciate that! No i did not see that but i needed to find first the ic and then watch around the board for other component defects. Hmm you mean the little one next to the rectifier capacitor?(big one) do you know the value for this too?
              No, I have no idea... It seems to be a 1/2W resistor with a 1% tolerance. It may be used for current measurement. The value is impossible to read. It looks something like "green - brown - ? - ? - brown". You can check it with a multimeter to see if it is actually broken.

              Originally posted by johnis82 View Post
              victorcas Do you have a schematic diagram for your PSU?
              No. It is almost impossible to find a schematic of a modern power supply, especially the Corsair ones. I think the only way to find out the broken components is to compare it to another Corsair PSU.

              That power supply seems to have a single layer PCB, so you can follow the traces and try to draw a schematic. With that, you might be able to find compatible components.

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                #8
                Re: Corsair TX-750 problem with finding component

                Thanks for the info guys i'll open it again and see if i can find anything.
                Thanks again for your time

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