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Vizio Eeprom location on main board??

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    #1

    Vizio Eeprom location on main board??

    I have a Vizio XVT553SV with the main board being a 0171-2272-3237, white sticker is 3655-0122-0150(7F). The problem started as most, back light comes on and can not turn off TV without pulling the plug. I traced down the problem to a 1117 reg. I replaced the 1117 and got the video to finally come back up. But now it's stuck at the Vizio Logo Screen. I searched around to find out it is most likely the eeprom corrupted. So I got to looking at mine and the eeprom closest to the processor is location U40 and not U14 or U18 like most post are suggesting to check. I have searched to find a U40 eeprom and can not find one, just U18 or U14 on the bay. How do I go about find or getting one? Are the U18/U14 the same as what I need? Thanks for any heads up!
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    #2
    Re: Vizio Eeprom location on main board??

    How did you know the regulator was bad and which one was it? I had the same model vizio tv with a main board problem that had backlights on, had sound, but no picture.

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      #3
      Re: Vizio Eeprom location on main board??

      Originally posted by Glitcher View Post
      How did you know the regulator was bad and which one was it? I had the same model vizio tv with a main board problem that had backlights on, had sound, but no picture.
      From budm

      https://www.badcaps.net/forum/showth...999#post300999

      and this is from my notes. It it helps me out when I get confused

      Testing voltage regulators.*

      This is the way to figure out if the adjustable regulator is good or not:
      Notes: we are looking at the regulator with the Big tab up (the big tab is tied internally to the center pin).
      Adjustable regulator will have two resistors attached to it, one resistor (Rfb) is between pin1 and pin2, another resistor (Rg) is between pin1 and ground. Pin3 is an input pin.*
      The voltage between the Adjust pin (left pin) and the center pin (Pin2, output) will always be 1.25V +/- 2% (this is the precision voltage reference), if it is not, it is bad.
      To figure out what the output voltage should be: measure the voltage between pin 1 and ground and add 1.25V to that number, that is the output voltage on pin 2 but you have to make sure you do have 1.25 between pin 1 and 2 as noted above.
      See my Voltage calculator spreadsheet here, post #6:
      Did I leave the soldering iron on?

      Comment

        #4
        Re: Vizio Eeprom location on main board??

        U18 U40 and so on are just the location descriptions on the board.
        The eeprom itself should have a part number on it and that is what you should be looking for.
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

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          #5
          Re: Vizio Eeprom location on main board??

          Vizio XVT553SV is a smart TV with Internet Apps copying the eeprom requires very expensive programmer. All eeprom on the Internet for sale are not smart TVs. You will have to replace your main board
          Last edited by ecking767; 01-22-2014, 10:05 AM.

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            #6
            Re: Vizio Eeprom location on main board??

            I was thinking the same thing ecking767. Thanks for verifying that.
            Last edited by minuteman3282; 01-22-2014, 05:46 PM.

            Comment

              #7
              Re: Vizio Eeprom location on main board??

              Just to clarify something that is clearly sounding confusing at best: the eeprom type has nothing to do with whether the TV is smart or not.

              "Eeprom" is, in fact, even not the proper term for the memory because it can be different type, but that's another story.

              The point is that smart TVs can use regular eeprom ICs with as little as 8 pins and regular TVs can use NAND flash memories with partitioning.

              The programmers for those are more expensive at the moment, but time will sure take care of that too.

              Besides, they are not THAT much more expensive.

              Definitely not at DIY level yet though.

              Comment

                #8
                Re: Vizio Eeprom location on main board??

                Originally posted by freakaftr8 View Post
                From budm

                https://www.badcaps.net/forum/showth...999#post300999

                and this is from my notes. It it helps me out when I get confused

                Testing voltage regulators.*

                This is the way to figure out if the adjustable regulator is good or not:
                Notes: we are looking at the regulator with the Big tab up (the big tab is tied internally to the center pin).
                Adjustable regulator will have two resistors attached to it, one resistor (Rfb) is between pin1 and pin2, another resistor (Rg) is between pin1 and ground. Pin3 is an input pin.*
                The voltage between the Adjust pin (left pin) and the center pin (Pin2, output) will always be 1.25V +/- 2% (this is the precision voltage reference), if it is not, it is bad.
                To figure out what the output voltage should be: measure the voltage between pin 1 and ground and add 1.25V to that number, that is the output voltage on pin 2 but you have to make sure you do have 1.25 between pin 1 and 2 as noted above.
                See my Voltage calculator spreadsheet here, post #6:

                This RIGHT HERE ^^^^^^^^^^^^ is GOLD !!! Thank YOU!!! this solve problems in hundreds of tv's !

                Comment

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