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Problem with TX650 Corsair Power Supply

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    #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
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    #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

    Ryzen 9 "Vermeer" 5900X

    16 GB AData XPG Spectrix D41

    Sapphire Nitro+ Radeon RX 6750 XT

    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

      #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

        #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

          #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

          16 GB AData XPG Spectrix D41

          Sapphire Nitro+ Radeon RX 6750 XT

          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

            #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

              #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
              9 PC LCD Monitor
              6 LCD Flat Screen TV
              30 Desk Top Switching Power Supply
              10 Battery Charger Switching Power Supply for Power Tool
              6 18v Lithium Battery Power Boards for Tool Battery Packs
              1 XBox 360 Switching Power Supply and M Board
              25 Servo Drives 220/460 3 Phase
              6 De-soldering Station Switching Power Supply 1 Power Supply
              1 Dell Mother Board
              15 Computer Power Supply
              1 HP Printer Supply & Control Board * lighting finished it *


              These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

              1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
              2 Hem Saw Computer Stack Board

              All of these had CAPs POOF
              All of the mosfet that are taken out by bad caps

              Comment

                #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.

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