Vizio VX42L U33 Part Replacement ?

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  • gtrplayr1976
    New Member
    • Jan 2012
    • 5
    #1

    Vizio VX42L U33 Part Replacement ?

    I have what seems to be the same issue in some of these posts with this Vizio. I checked the VO on U33 ,and it reads 2.1 VDC. I just need to know where to find a replacement ,and is this a fixed ,or adjustable regulator. I have not found this manufacturer at Mouser, or Digikey.
    Part is marked AMC1117 F07131.

    Thanks, Tom
    Tags: None
    • Scenic
      o.O
      • Sep 2007
      • 2640
      • Germany
      #2
      Re: Vizio VX42L U33 Part Replacement ?

      If there's no voltage designation on the chip (like 1117-33 for 3.3V for example) and there are resistors connected to the leftmost (ADJ/GND) pin, it's most likely an adjustable version.

      The 1117 series voltage regulators are pretty much a jellybean part, much like the 78xx series.

      http://www.alldatasheet.com/datashee...K/AMC1117.html

      edit: Assuming it is an adjustable version:
      http://www2.mouser.com/Semiconductor...cing|0&FS=True
      just make sure the package matches the one you have..
      Last edited by Scenic; 01-09-2012, 08:00 PM.

        Comment

        • gtrplayr1976
          New Member
          • Jan 2012
          • 5
          #3
          Re: Vizio VX42L U33 Part Replacement ?

          Originally posted by Scenic
          If there's no voltage designation on the chip (like 1117-33 for 3.3V for example) and there are resistors connected to the leftmost (ADJ/GND) pin, it's most likely an adjustable version.

          The 1117 series voltage regulators are pretty much a jellybean part, much like the 78xx series.

          http://www.alldatasheet.com/datashee...K/AMC1117.html

          edit: Assuming it is an adjustable version:
          http://www2.mouser.com/Semiconductor...cing|0&FS=True
          just make sure the package matches the one you have..
          Thanks a bunch. That's the exact number off the part.

            Comment

            • gtrplayr1976
              New Member
              • Jan 2012
              • 5
              #4
              Re: Vizio VX42L U33 Part Replacement ?

              Update : Replacing U33 seems to have fixed the issue. I have a blue screen with no signal box floating around ,and it turns off ,and on with the remote.

              Thanks for the help.

                Comment

                • shelby5041
                  Badcaps Legend
                  • Feb 2009
                  • 1504
                  • united states of america usa
                  #5
                  Re: Vizio VX42L U33 Part Replacement ?

                  Had vizio lcd tv power on...backlight only..no power off

                  Tested u33 per youtube video....and replaced it...cost .76

                  Tv now fixed

                  Thank you badcaps and especially you tube

                    Comment

                    • shelby5041
                      Badcaps Legend
                      • Feb 2009
                      • 1504
                      • united states of america usa
                      #6
                      Re: Vizio VX42L U33 Part Replacement ?

                      If anyone needs part # contact me..

                        Comment

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