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Vizio E321VL

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    Re: Vizio E321VL

    Awesome! I wonder how the cable became so damaged in the first place? Factory/assembly error?
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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      Re: Vizio E321VL

      That is great news and I am glad you did not give up on it. I wonder if your EEPROM is the problem or not from the beginning.
      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


        Re: Vizio E321VL

        Originally posted by tom66 View Post
        Awesome! I wonder how the cable became so damaged in the first place? Factory/assembly error?
        Could have been, could have been the previous owner. Those ribbon cables (at least the small ones) are not that tough. Now the bigger one leading to the TCon appears to be pretty strong, I also ran a continuity check on it. Thanks for all your help.
        Have you ever stopped to think and then forget to start thinking again?

        As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

        Comment


          Re: Vizio E321VL

          Originally posted by budm View Post
          That is great news and I am glad you did not give up on it. I wonder if your EEPROM is the problem or not from the beginning.
          That is a question I thought of. But it might have been all three the LDO's, EEProm and the cable. Who knows. Just glad it is repaired. This is something to remember when one of the symptoms is the remote does not work. Thanks for all your help.
          Have you ever stopped to think and then forget to start thinking again?

          As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

          Comment


            Re: Vizio E321VL

            Killian, you said that you reflowed the solder on U48. I can't seem to locate U48 could you give me some help in locating it? Thanks in advance!

            Comment


              Re: Vizio E321VL

              Not sure it was KP who said that it is here:

              https://www.badcaps.net/forum/attach...5&d=1332356189

              Middle sized chip in the white box - may need spacialist equipment?
              Please upload pictures using attachment function when ask for help on the repair
              http://www.badcaps.net/forum/showthread.php?t=39740

              Comment


                Re: Vizio E321VL

                Originally posted by rgb62901 View Post
                Killian, you said that you reflowed the solder on U48. I can't seem to locate U48 could you give me some help in locating it? Thanks in advance!
                It is the large square chip has a white rectangle around it and other components. It is the main video chip on the main board I believe. Should be sort of left middle of the board. Has MediaTek written on it.
                Have you ever stopped to think and then forget to start thinking again?

                As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                Comment


                  Re: Vizio E321VL

                  I didnt have the same problem as the OP.. But I found this post because I was searching for E320VL.. My problem was TV would power on and work for about 10 minutes and shut off (sleep timer off). Sometime it would do this, and then start powering on and off by its self... So I recapped the board because I had the caps handy and still had the same problems.. I did A LOT of digging on the net and found a tip that a guy said that he had similar problem.. He said for some unknown reason, if he went to the audio settings and changed from Dolby to PCM it cured the problem.. Well holy crap, it does work... My tv has been running for 36 hrs straight and going strong.. I have since went ahead and did a total factory setting reset.. Just a tip for others that may find this thread with similar problems to mine..

                  Comment


                    Re: Vizio E321VL

                    Vizio E321VL, with AmTR board 3632-1512-0150 (4D)

                    I have 5.05 volts at power supply board and no 12 volts, but can turn on 12 volts with the 3 volt input to the power supply board, therefore think the power supply board is ok.
                    There appears to be low voltage problems on the mainboard at the regulators, but without the schematic I do not know which parts affect the others.

                    I have not seen anyone report the resistance readings at all three of these regulators, but here are my readings in ohms, measured from pins 1, 2, and 3 relative to ground:
                    U4 74.7, 17.1, 1000+
                    U5 46.7, 136.6, 0.3
                    U8 0.1, 1.2, 0.3

                    Since pin 3 is the voltage input to these regulators, it appears there might be a short somewhere. There is no voltage in standby mode on either U5 or U8, but U4 seems to have some good readings.

                    Should there be voltages at U4, U5, and U8 in standby mode (without the 12 volt supply on)?

                    Does anyone have a schematic for this board?

                    Comment


                      Re: Vizio E321VL

                      I'm far from an expert, but are those readings taken with the black lead of the DMM to chassis ground, and the red lead to each of the three leads, using dc voltage 200v setting? If so, something is way off. The input voltages should be near 5v or 3.3v or something low like that. It almost looks like something is flaky with what you're using for ground, or you have it on ohms?

                      Comment


                        Re: Vizio E321VL

                        One bad thing about Digital Ohm meter when you try to read resistance on the board that still have residue DC voltage still left charge the caps, it will mess up the reading. Put the meter in lowest DC scale and take the reading, it is has as small as 0.5V reading, when you do the Ohm reading on that same spot, the resistance will be way off because the DC voltage of the circuit will mess up the input circuit of the meter (it does not damage the meter). So make sure to discharge the caps.
                        Also the adjustable LDO will have low value resistor (100~200 Ohms) between the ADJ pin and the output pin, and another low value between the Adj pin and Ground, so the output resistance will be at least the value of those two resistors in series.
                        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


                          Re: Vizio E321VL

                          Thanks Worminizer for your comments. As I mentioned in the post these readings are in ohms, and that there is no voltage measured at U4 and U5 (zero volts). Could be bad regulators, or other shorts on the board I suspect.

                          Comment


                            Re: Vizio E321VL

                            Thanks budm for your comments. No voltages were measured on U4 or U5 so something must be shorted somewhere. This failed during a storm, so maybe a spike came in through the cable connection and did some damage to this board. Without a schematic, I may not waste any time with this.

                            Comment


                              Re: Vizio E321VL

                              Originally posted by missouri44 View Post
                              Thanks Worminizer for your comments. As I mentioned in the post these readings are in ohms, and that there is no voltage measured at U4 and U5 (zero volts). Could be bad regulators, or other shorts on the board I suspect.
                              Correction: I meant to say U5 and U8 measured zero volts on all pins, and U4 measured normal voltage.

                              Comment


                                Re: Vizio E321VL

                                Originally posted by missouri44 View Post
                                Thanks budm for your comments. No voltages were measured on U4 or U5 so something must be shorted somewhere. This failed during a storm, so maybe a spike came in through the cable connection and did some damage to this board. Without a schematic, I may not waste any time with this.
                                Correction: I meant to say U5 and U8 measured zero volts on all pins, and U4 measured normal voltage.

                                Comment


                                  Re: Vizio E321VL

                                  Originally posted by lilmonk3 View Post
                                  I didnt have the same problem as the OP.. But I found this post because I was searching for E320VL.. My problem was TV would power on and work for about 10 minutes and shut off (sleep timer off). Sometime it would do this, and then start powering on and off by its self... So I recapped the board because I had the caps handy and still had the same problems.. I did A LOT of digging on the net and found a tip that a guy said that he had similar problem.. He said for some unknown reason, if he went to the audio settings and changed from Dolby to PCM it cured the problem.. Well holy crap, it does work... My tv has been running for 36 hrs straight and going strong.. I have since went ahead and did a total factory setting reset.. Just a tip for others that may find this thread with similar problems to mine..
                                  Well it lasted about 2 months and started shutting off again and the above fix wouldnt fix it again.. So I guess its something else now..

                                  Comment


                                    Re: Vizio E321VL

                                    Normally I just lurk around these forums in silence, but I just wanted to say I've fixed three of these tvs simply by reflowing the ram, main control ic, and the eeprom using my rework station and some good ol' rosin flux (yes I used flux cleaner afterwards). One froze at startup. The second one would not react to the power button being pressed at all. And the last one would start sometimes. The only one I did something different on was the one that would not start up at all. I replaced all of the adjustable regulators using part number AS1117. All have been working great thus far.

                                    Comment


                                      Re: Vizio E321VL

                                      Thanks for sharing that I have been thinking besides the old voltage regulators going bad that all these main board failures with Vizio must have a common problem, maybe that's it..

                                      Comment


                                        Re: Vizio E321VL

                                        killian thanks for starting this thread and not giving up cuz i might never have thought to check the IR board but lo and behold that was the problem!
                                        Don't fear the repair...

                                        Comment


                                          Re: Vizio E321VL

                                          Exact same thing happened to me on a Philips brand. No continuity on half the ribbon to IR, Found one on ebay and bam, got me a 40" for my garage now.

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