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ASUS RT-AX88U router DEAD

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    ASUS RT-AX88U router DEAD

    Hi Can anyone help identify this component pls

    The Asus RT-AX88U router is dead & fault finding brings it to a DC to DC convertor. 3.3v goes in, but nothing comes out. The IC is marked "3002 0ST1"

    There is a 2nd working small IC marked "3001 0gt1" that converts 3.3v to 1.8v, both power separate CPu's on the board.

    I have also searched for a schematic for it, to no avail.
    Attached Files
    Last edited by SMDFlea; 11-14-2022, 04:02 PM. Reason: RT-AX88U

    #2
    Re: ASUS RT-AX88U router DEAD

    Check the if the output is shorted to gnd via the caps too.

    Comment


      #3
      Re: ASUS RT-AX88U router DEAD

      I have the same model router with exactly the same fault, please let me know if you manage to fix it or find any info on the dc-dc chip, coil or caps.
      It's a pain to work on, requiring lots of back heat to remove the SMD components, mine has about 92ohms to ground on the output of that circuit.
      Thanks
      Martin

      Comment


        #4
        Re: ASUS RT-AX88U router DEAD

        Hello,

        I'm trying to repair the same model but in my case it appears to be a different fault...

        https://www.badcaps.net/forum/showthread.php?t=113203

        Would someone with the same router be so kind as to help me identifying U613 ? I'd like to confirm whether U613 is the same as U614 on the PCB or not.

        If I can resurrect that thing I'll definitely keep you posted.

        Cheers,

        Michael

        Comment


          #5
          Re: ASUS RT-AX88U router DEAD

          Hi Michael,
          On my board, U613 and U614 are both 0Q=13V
          Thanks,
          Martin
          Attached Files

          Comment


            #6
            Re: ASUS RT-AX88U router DEAD

            It might not be the same case as yours , but still , it occurred many times with me lately . The adapters , although measuring the right voltages , depending on models , but it seems at load they were failing , in amperage of course . On trying another ones , routers would work smoothly .

            Comment


              #7
              Re: ASUS RT-AX88U router DEAD

              Originally posted by waveslinger View Post
              Hi Michael,
              On my board, U613 and U614 are both 0Q=13V
              Thanks,
              Martin
              Thanks a lot Martin !

              Comment


                #8
                Re: ASUS RT-AX88U router DEAD

                Hi I have one RT-AX88U Dead, but in my case is caps of L1126 area, after remove 5 caps and test with energy power, my router come back to life.

                Someone can please tell me caps specs??
                Attached Files

                Comment


                  #9
                  Re: ASUS RT-AX88U router DEAD

                  Hi there to all,
                  In my case, a cap on the L1126 area was clearly cracked. Router was dead, apparently the power supply was shorted. I removed it and router came back to life. Unfortunately I don't have the specs but I'm planning to replace it with a 4.7uF 50V 1206 X7R. Since I could see many other caps in parallel and the router already works without it, I can only guess it's not that critical. I will post my results.

                  Comment


                    #10
                    Re: ASUS RT-AX88U router DEAD

                    I also have a ax88u with no power. I'm getting 19v coming in but seems like the DC convertors are no being enable as I get no output. I am getting a half volts on the LEDs and 1V on U24. Any help please

                    Comment

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