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    vizio vp322 powers on but weird pixelation

    I picked up this tv for free
    The lady was going to throw it in the trash

    I read previous posts on this model tv but nothing comes close to what im experiencing unless I misread something

    Anyways when I press the power button(no remote control) it powers up, psu clicks, tcon lights up and ysus turns on with a noticable buzzing noize.
    No logo shows up on the screen then this weird blue pixelation is going on.
    I hope the panel isnt defective

    I checked the fuses on the psu and they are good
    No visible faulty caps
    The y-sus board fuse is good

    Here are the voltage readings
    Connector on psu going to ysus board
    Va 59.6v
    Vs 190.4
    5.05v

    Connector on psu to main board
    5.08v
    12.11v
    16.41v



    After the tv has been on for a few minutes some of the blue pixels have disappeared. Not sure if this is good or bad

    The 7th and 10th picture are blue pixels just like the 6th picture. The lighting in my room caused a different color but its blue


    So what else should I test?
    Attached Files

    #2
    Re: vizio vp322 powers on but weird pixelation

    You need to find the voltage test points on the Ysus and xmain and see what they are. There is a sticker on the panel telling you all these voltages can you post a photo of that?

    Comment


      #3
      Re: vizio vp322 powers on but weird pixelation

      I did its pic number 11

      And I tested the voltages at the connector

      Comment


        #4
        Re: vizio vp322 powers on but weird pixelation

        You are missing VZB, the test point is on the Ysus the arrow points to the leg of a resistor. VSC is also on the Ysus he test point is below a large red capacitor.
        Last edited by Shinju; 01-12-2015, 10:02 PM.

        Comment


          #5
          Re: vizio vp322 powers on but weird pixelation

          i dont know why my camera flipped some of the pictures but i can retake pictures if needed

          Comment


            #6
            Re: vizio vp322 powers on but weird pixelation

            I believe the way this plasma is designed is the x and y are on the same board, smallest plasma made in the states as far as I know.

            I have only got to play with one, never had the chance to own one to tinker with.

            Comment


              #7
              Re: vizio vp322 powers on but weird pixelation

              Vzb is 79.4v

              Vsc is -103.2v
              Attached Files

              Comment


                #8
                Re: vizio vp322 powers on but weird pixelation

                Yeah, VSC should be -185 and VZB 140 as per sticker spec. You got a bad y/x board. Lucky for you these are cheap.


                Match your Ysus part number here and your are set.

                http://www.shopjimmy.com/vizio/vp322...o+VP322HDTV10A

                Comment


                  #9
                  Re: vizio vp322 powers on but weird pixelation

                  Just to be 100% sure let's try the test patterns, ok on your controller board you will see 3 copper ring holes near the bottom right of the board.

                  With the TV off and the LVDS unplugged from the controller board jump R241 and R211 with a jumper wire and plug in the TV and tell us what you see on the screen.
                  Last edited by Shinju; 01-12-2015, 10:19 PM.

                  Comment


                    #10
                    Re: vizio vp322 powers on but weird pixelation

                    i ordered the board

                    thanks for the help

                    what causes this problem on the ysus?

                    Comment


                      #11
                      Re: vizio vp322 powers on but weird pixelation

                      LVDS cable connects the mainboard to the controller board.

                      Comment


                        #12
                        Re: vizio vp322 powers on but weird pixelation

                        The red circle or purple circle is the lvds cable?
                        Attached Files

                        Comment


                          #13
                          Re: vizio vp322 powers on but weird pixelation

                          Purple.

                          Comment


                            #14
                            Re: vizio vp322 powers on but weird pixelation

                            Ok I jumpered the board like you said

                            I got several patterns with different colors but the patterns are distorted like the pictures I posted before of the blue pixelation

                            The paterns would go vertical and horizontal
                            Attached Files

                            Comment


                              #15
                              Re: vizio vp322 powers on but weird pixelation

                              Question, the longer you keep this unit on does the dark splotches start to go away?

                              Comment


                                #16
                                Re: vizio vp322 powers on but weird pixelation

                                if you look at my first post pictures number 6 and 7 are when i frist powered the tv

                                picture number 10 is after the tv has been on for more then 10minutes

                                so yes the blue pixels spots go away but not all

                                i hope i am making sense

                                Comment


                                  #17
                                  Re: vizio vp322 powers on but weird pixelation

                                  Also while you have your TV apart I would replace the 2 3300uf Caps on the power supply and the 470v as the caps for spots C205 C241 and C236 (cannot remember their values) these are located near the plug going to the mainboard.

                                  The will fail they are the other cause of these little plasma panels failures on the power supply.
                                  Last edited by Shinju; 01-12-2015, 11:32 PM.

                                  Comment


                                    #18
                                    Re: vizio vp322 powers on but weird pixelation

                                    So I should replace all the caps in the red circle right?

                                    And I should also order the ysus board right?
                                    Attached Files

                                    Comment


                                      #19
                                      Re: vizio vp322 powers on but weird pixelation

                                      Sure, those are them. This looks like a sustain failure if it was mine I would take a chance for 20.00 +ship, these are cool little 720p tvs.

                                      Comment


                                        #20
                                        Re: vizio vp322 powers on but weird pixelation

                                        I will order every thing tomorrow morning

                                        Thanks for all your help

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