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Vizio E55-D0 help identifying "smoked" IC on main board

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    Vizio E55-D0 help identifying "smoked" IC on main board

    Hi folks, I have this Vizio E55-D0 that will not turn on. After some searching I found this IC smoked on the Main Board. Unfortunately the numbers are burnt off too. The IC is board number UA5.

    Can anyone help me find a number for this? I'd appreciate it.
    Attached Files
    They call me......."threadkiller"

    #2
    Re: Vizio E55-D0 help identifying "smoked" IC on main board

    see if you can get a closer pic ..has to be in focus .

    Comment


      #3
      Re: Vizio E55-D0 help identifying "smoked" IC on main board

      Thanks petehall347, hopefully one of these might work?
      Attached Files
      They call me......."threadkiller"

      Comment


        #4
        Re: Vizio E55-D0 help identifying "smoked" IC on main board

        thats strange as i thought i could see some writing on pic 4 first lot of pics .

        Comment


          #5
          Re: Vizio E55-D0 help identifying "smoked" IC on main board

          I looked at a ShopJimmy picture, the printing on the top is supposed to be yellow. I can't see any of it, even with a microscope.
          They call me......."threadkiller"

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            #6
            Re: Vizio E55-D0 help identifying "smoked" IC on main board

            looks like you need the schematic . will need resistor values etc for what connects to it as well .

            Comment


              #7
              Re: Vizio E55-D0 help identifying "smoked" IC on main board

              Originally posted by petehall347 View Post
              looks like you need the schematic . will need resistor values etc for what connects to it as well .
              Yes...looks like lots of casualties. Has anyone had any luck finding schematics for these?

              Time to scour the webs!
              They call me......."threadkiller"

              Comment


                #8
                Re: Vizio E55-D0 help identifying "smoked" IC on main board

                Well that went over like a lead balloon. I haven't found a thing. Vizio, release the repair information lol
                They call me......."threadkiller"

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                  #9
                  Re: Vizio E55-D0 help identifying "smoked" IC on main board

                  The best picture seems to be from SJ, the ic seems to be a TI ldo, these markings look similar (this ic's pinout is different)
                  Attached Files

                  Comment


                    #10
                    Re: Vizio E55-D0 help identifying "smoked" IC on main board

                    The ic might be a Ti TPS54331 or TPS54231, the tps54231 has 12Vin, 3.3vout using a 10µH coil? Check if the resistors are close for this voltage
                    Last edited by R_J; 09-26-2020, 09:10 PM.

                    Comment


                      #11
                      Re: Vizio E55-D0 help identifying "smoked" IC on main board

                      Originally posted by R_J View Post
                      The ic might be a Ti TPS54331 or TPS54231, the tps54231 has 12Vin, 3.3vout using a 10µH coil? Check if the resistors are close for this voltage
                      The TV is put back together for now...I have 60 TVs to tear down. It's first on the list once that's done.
                      They call me......."threadkiller"

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