vizio E320-A1 not working

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  • mhoward
    Member
    • Jun 2013
    • 11
    • USA

    #1

    vizio E320-A1 not working

    I plug the tv in white light blinks lower left then goes out
    I can push the power button and light will come on steady and stay on
    but nothing else happens
    I have tested the power at out put plug and they match the stated voltages next to plug

    I also have seen that they have problems with voltage regulators and to of them have an out put of 3.3 volts with a part number of 17-33
    and according to data sheet I found it should be 3.3 v
    one other slightly lager one part number 1234dg or 1084 has 3.2 volts out
    connected to another one 912T63 that has 3.3 volts in and 1.19 volts out

    is there anything else I can check or would it be easier to replace main board which I think is bad

    the video board is 715G5660-M0E-000-004K

    thanks for any help
  • retiredcaps
    Badcaps Legend
    • Apr 2010
    • 9271

    #2
    Re: vizio E320-A1 not working

    Originally posted by mhoward
    one other slightly lager one part number 1234dg or 1084 has 3.2 volts out
    connected to another one 912T63 that has 3.3 volts in and 1.19 volts out
    Assuming your multimeter is accurate, both the readings above are out of specification and could be causing your problem. See

    https://www.badcaps.net/forum/showthread.php?t=22231

    as to why.
    Last edited by retiredcaps; 06-16-2013, 10:46 PM.
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    Comment

    • mhoward
      Member
      • Jun 2013
      • 11
      • USA

      #3
      Re: vizio E320-A1 not working

      okay I have retested them

      1084
      1234DG
      pin 1 2.05 volts
      pin 2 3.3 volts
      pin 3 5.23 volts

      connected to the out put of first one is

      0283
      912T63
      pin 1 ground
      pin 2 1.19 volts
      pin 3 3.3 volts

      25D
      17-33
      pin 1 ground
      pin 2 3.29 volts
      pin 3 5.25 volts

      25D
      17-33
      pin 1 ground
      pin 2 3.29 volts
      pin 3 5.23 volts
      Attached Files

      Comment

      • retiredcaps
        Badcaps Legend
        • Apr 2010
        • 9271

        #4
        Re: vizio E320-A1 not working

        Originally posted by mhoward
        0283
        912T63
        pin 1 ground
        pin 2 1.19 volts
        pin 3 3.3 volts
        The above is correct. I was looking at the wrong datasheet. The correct one is

        https://cdn.badcaps-static.com/pdfs/...25e4855b99.pdf

        which specifies it is a fixed 1.2V regulator.

        25D
        17-33
        pin 1 ground
        pin 2 3.29 volts
        pin 3 5.25 volts

        25D
        17-33
        pin 1 ground
        pin 2 3.29 volts
        pin 3 5.23 volts
        The above two are good. When you reort just 3.2V it implies 3.200000V. Obviously, when you report 3.29, you can see what a difference it makes.
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        Comment

        • mhoward
          Member
          • Jun 2013
          • 11
          • USA

          #5
          Re: vizio E320-A1 not working

          okay thanks
          but any ideas what else I could check as to why it will not turn on at this point

          Comment

          • retiredcaps
            Badcaps Legend
            • Apr 2010
            • 9271

            #6
            Re: vizio E320-A1 not working

            On the connector from power board to the main board, measure the DC voltages and report them like this.

            pin 1 = legend says 12V, I get 11.99V
            pin 2 = etc
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            Comment

            • mhoward
              Member
              • Jun 2013
              • 11
              • USA

              #7
              Re: vizio E320-A1 not working

              okay I have

              pin legend reading

              13 on/off 247.5 ohms to ground
              12 Dim 6.78 ohms to ground
              11 +12v 12.38v
              10 +12v 12.38v
              9 GND 0.0 ohms to ground
              8 GND 0.0 ohms to ground
              7 GND 0.0 ohms to ground
              6 +24v 24.75v
              5 +24v 24.75v
              4 ps_on 4.83v
              3 5.2v 5.25v
              2 5.2v 5.25v
              1 nc

              the pin 13 never seems to see any voltage not sure if it will at some point or not, same with the 12 pin for dim

              thanks
              Attached Files

              Comment

              • retiredcaps
                Badcaps Legend
                • Apr 2010
                • 9271

                #8
                Re: vizio E320-A1 not working

                Originally posted by mhoward
                13 on/off 247.5 ohms to ground
                12 Dim 6.78 ohms to ground
                Pin 13 is likely backlight on/off. If there is no voltage, the backlight will not come on. The main board controls this functionality.

                Hookup a source (like a DVD player) and see if you have picture and/or sound.
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                We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                Please do not post inline and offsite as they slow down the loading of pages.

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                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #9
                  Re: vizio E320-A1 not working

                  "13 on/off 247.5 ohms to ground
                  12 Dim 6.78 ohms to ground"
                  The readings are in Ohms instead of Volts, what are the voltage reading on these two pins?
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                  Comment

                  • mhoward
                    Member
                    • Jun 2013
                    • 11
                    • USA

                    #10
                    Re: vizio E320-A1 not working

                    there is no voltage on the pins 12 and 13

                    I also hooked up the TV to my cable box by way of the RCA audio and video plugs
                    and I have nothing no sound at all

                    Comment

                    • Cosmo66
                      Senior Member
                      • Nov 2012
                      • 87
                      • USA

                      #11
                      Re: vizio E320-A1 not working

                      Does the backlight come on?

                      Comment

                      • mhoward
                        Member
                        • Jun 2013
                        • 11
                        • USA

                        #12
                        Re: vizio E320-A1 not working

                        no the back light does not come on

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: vizio E320-A1 not working

                          Those two signals:bl_on (or ON/OFF) and the backlights dimming control are generated by the main board, that is why there is no backlights even though you have 24V feeding the inverter board. The PS_ON signal from main board is working otherwise you will not get the 24VDC for the inverter board. You will have to work on the main board next, I am not sure if this VIZIO series is one of those with the bad EEPROM pronblem or not.
                          Never stop learning
                          Basic LCD TV and Monitor troubleshooting guides.
                          http://www.badcaps.net/forum/showthr...956#post305956

                          Voltage Regulator (LDO) testing:
                          http://www.badcaps.net/forum/showthr...999#post300999

                          Inverter testing using old CFL:
                          http://www.badcaps.net/forum/showthr...er+testing+cfl

                          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                          http://s807.photobucket.com/user/budm/library/

                          TV Factory reset codes listing:
                          http://www.badcaps.net/forum/showthread.php?t=24809

                          Comment

                          • ecking767
                            Badcaps Veteran
                            • Oct 2009
                            • 492
                            • USA

                            #14
                            Re: vizio E320-A1 not working

                            this Vizio 32" has LED back-lighting. you need to upload pictures of the power supply and LED driver board section.

                            Comment

                            • mhoward
                              Member
                              • Jun 2013
                              • 11
                              • USA

                              #15
                              Re: vizio E320-A1 not working

                              here is some pics of the power supply and main board
                              Attached Files

                              Comment

                              • mhoward
                                Member
                                • Jun 2013
                                • 11
                                • USA

                                #16
                                Re: vizio E320-A1 not working

                                does anybody have any other ideas?

                                Comment

                                • bmolke
                                  Member
                                  • Jul 2012
                                  • 21
                                  • usa

                                  #17
                                  Re: vizio E320-A1 not working

                                  mhoward did you ever figure this one out? I have the same issue

                                  Comment

                                  • mhoward
                                    Member
                                    • Jun 2013
                                    • 11
                                    • USA

                                    #18
                                    Re: vizio E320-A1 not working

                                    no I ended up just replacing the main board

                                    Comment

                                    • Beester
                                      New Member
                                      • Jul 2013
                                      • 2
                                      • United States

                                      #19
                                      Re: vizio E320-A1 not working

                                      I have the exact same issue and same TV. I wish there was a known solution to the problem.

                                      Comment

                                      • mhoward
                                        Member
                                        • Jun 2013
                                        • 11
                                        • USA

                                        #20
                                        Re: vizio E320-A1 not working

                                        the board was $69 on ebay and the guy gave me $20 back for giving him the old one

                                        Comment

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