Problem with TX650 Corsair Power Supply

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  • starengose
    New Member
    • Nov 2019
    • 7
    • France

    #1

    Problem with TX650 Corsair Power Supply

    Dear All,

    Sorry for my english.
    I need some help concerning this power supply. It doesn't works anymore, any output voltage.
    I put some pictures of power supply I trying to test it most of capacitors tested are ok. It's difficult to test small cms capacitors sometimes my multimeter doesn't display something. I've tested also with power on but impossible to get logical values for example I have alternative voltage in parts of continue voltage.
    I've tested most of component I changed a opto-coupler but I don't think it was damaged. As you can see in picture 225300 when I open cover I found burn part (metalic ring) between two tracks. I removed it but you can see burn marks.
    If someone can help or can get a shematic because it's difficult to me to fix board with alternative voltage because I don't have oscilloscope.
    I have also a problem with cms diode I don't know the sense.

    Thanks for your help.
    Attached Files
  • RJARRRPCGP
    Badcaps Legend
    • Jul 2004
    • 6304
    • USA

    #2
    Re: Problem with TX650 Corsair Power Supply

    Code:
    RJARRRPCGP system error: One or more photos unreadable. (blurring)
    Well, one of the photos appear to be improperly focused.
    ASRock B550 PG Velocita

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    "¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mí mismo

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    "did I see a chair fly? I think I did! Time for popcorn!" -ratdude747

    Comment

    • starengose
      New Member
      • Nov 2019
      • 7
      • France

      #3
      Re: Problem with TX650 Corsair Power Supply

      Dear Rjarrrpcgp, sorry I am not expert to take picture properly.
      Here you are thanks.
      Attached Files
      Last edited by starengose; 11-06-2019, 01:14 PM.

      Comment

      • xmetal
        Tinkerer
        • Nov 2010
        • 6
        • UK

        #4
        Re: Problem with TX650 Corsair Power Supply

        Those green electrolytic capacitors in the last photo look like they are bulging and will likely need replacing. Do you have an ESR tester for checking the caps?
        Last edited by xmetal; 11-06-2019, 05:19 PM.

        Comment

        • RJARRRPCGP
          Badcaps Legend
          • Jul 2004
          • 6304
          • USA

          #5
          Re: Problem with TX650 Corsair Power Supply

          Doesn't look like actual bulging. (no bulge at the vent seams)
          ASRock B550 PG Velocita

          Ryzen 9 "Vermeer" 5900X

          32 GB G.Skill RipJaws V F4-3200C16D-32GVR

          Arc A770 16 GB

          eVGA Supernova G3 750W

          Western Digital Black SN850 1TB NVMe SSD

          Alienware AW3423DWF OLED




          "¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mí mismo

          "There's nothing more unattractive than a chick smoking a cigarette" -Topcat

          "Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat

          "did I see a chair fly? I think I did! Time for popcorn!" -ratdude747

          Comment

          • starengose
            New Member
            • Nov 2019
            • 7
            • France

            #6
            Re: Problem with TX650 Corsair Power Supply

            Thanks for your replies, I confirm that most of caps are ok I've disoldering most of them (big one not cms) and values are ok. Now I am suspected UP3861P and components around it (small board outside main board in picture). but I need way to test it only with multimeter.

            Comment

            • sam_sam_sam
              Badcaps Legend
              • Jul 2011
              • 6037
              • USA

              #7
              Re: Problem with TX650 Corsair Power Supply

              This just me but when I find any type switching power regulator I suspect that might be problem I replace it if the part is easy to get

              Comment

              • starengose
                New Member
                • Nov 2019
                • 7
                • France

                #8
                Re: Problem with TX650 Corsair Power Supply

                Dear All, I fixed PSU, I've only refresh solders on small board (caps) but about diode I put in same sense than other in board (cathode to ground) but with multimeter in one sense I've got 0.5V and other sense I've got 2.8V thereas normally I have to get only 0.5V in one sense and other infinite. I'll test it with motherboard and graphic card to know his durability.
                Thanks for your help.

                Comment

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