Vizio E321VL

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #41
    Re: Vizio E321VL

    Originally posted by killian6pk
    Well you can officially put me into the dumber than a rock catagory. It was in backwards. Took it out and resoldered it and now I am getting 171.9 volts at the Filter Cap. However I am not able to get the voltage to increase by pushing the on/off button. So I guess now I should check for 5V, 12V and 24V at the cable to the Main Board?
    The cap is probably ruined by that, I'm very surprised it didn't vent or blow the fuse.
    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.

    Comment

    • killian6pk
      Badcaps Veteran
      • Apr 2010
      • 502
      • USA

      #42
      Re: Vizio E321VL

      Originally posted by tom66
      The cap is probably ruined by that, I'm very surprised it didn't vent or blow the fuse.
      So I need to pull it and check ESR and capacitance or just replace 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

      • killian6pk
        Badcaps Veteran
        • Apr 2010
        • 502
        • USA

        #43
        Re: Vizio E321VL

        Decided to check the Vizio light on the front. It is steady Orange where I had no light before. Must be some progress. However, there are no backlights or nothing changes when I push the power button. At this time all the boards are connected to each other.
        Last edited by killian6pk; 06-04-2012, 01:26 PM.
        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

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #44
          Re: Vizio E321VL

          Ok Now you have the DC standby voltage of 170Vdc, since when you turn the power switch of the TV and the voltage did not go up to 400Vdc, it can mean two things: It is not getting the PS_ON from the Main board or the PFC IC circuits are not working. I will need you to get the P/N of the PFC IC and the SMPS IC so we check the VCC pins.
          Last edited by budm; 06-04-2012, 02:15 PM.
          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

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #45
            Re: Vizio E321VL

            @TOM, the cap should be OK, since the Didoe is put in backward, the diode never conducts. You can see the diagram I made.
            Killian, you may want to recheck all the parts you have installed, just to be sure.
            Last edited by budm; 06-04-2012, 02:16 PM.
            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

            • killian6pk
              Badcaps Veteran
              • Apr 2010
              • 502
              • USA

              #46
              Re: Vizio E321VL

              Originally posted by budm
              Picture of that D100 as mounted will help also.
              Bud check post #40 and the third page for Tom66 reply on Filter Cap etc.
              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

              • killian6pk
                Badcaps Veteran
                • Apr 2010
                • 502
                • USA

                #47
                Re: Vizio E321VL

                Originally posted by budm
                Ok Now you have the DC standby voltage of 170Vdc, since when you turn the power switch of the TV and the voltage did not go up to 400Vdc, it can mean two things: It is not getting the PS_ON from the Main board or the PFC IC circuits are not working. I will need you to get the P/N of the PFC IC and the SMPS IC so we check the VCC pins.
                Ok the part # for the PF IC is LTA100 over PQU18 (could not find a datasheet under either number. I will check DigiKey and Mouser to see if I get a hit on either number.

                Part # for SMPS IC is: L6599AD
                Data Sheet is: https://cdn.badcaps-static.com/pdfs/...d758189067.pdf
                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

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #48
                  Re: Vizio E321VL

                  The Cap is fine, if you look at the diagram, when you put in that Diode backward, the diode was never turn on, it was in reverse bias mode. you are OK, no need to change that cap.
                  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

                  • selldoor
                    Slow Learner
                    • Dec 2010
                    • 7870

                    #49
                    Re: Vizio E321VL

                    if we are now looking for smaller errors Killian6pk You did say you had resoldered some traces - I have been looking but could only see what I thought was one and it looked ok but of you want us to check you will have to mark where to look.
                    Anyway whilst looking I did find what appeared to be two broken traces. it may be the picture or shadow but please can you check where marked in attached.
                    Attached Files
                    Please upload pictures using attachment function when ask for help on the repair
                    http://www.badcaps.net/forum/showthread.php?t=39740

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #50
                      Re: Vizio E321VL

                      I need closed up pictures of the bottom side of the board acround the pfc ic and the SMPS IC so I can trace out the connections, also need the cloased up pictures of the connector on the power supply board so i can see the lables on them, I need to find ot which pin is PS_ON pin, this will be the next step.
                      Last edited by budm; 06-04-2012, 02:45 PM.
                      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

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #51
                        Re: Vizio E321VL

                        Again, SELLDOOR with his GREAT eyesights and software! Killian needs to really re-check his works really well.
                        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

                        • killian6pk
                          Badcaps Veteran
                          • Apr 2010
                          • 502
                          • USA

                          #52
                          Re: Vizio E321VL

                          Originally posted by selldoor
                          if we are now looking for smaller errors Killian6pk You did say you had resoldered some traces - I have been looking but could only see what I thought was one and it looked ok but of you want us to check you will have to mark where to look.
                          Anyway whilst looking I did find what appeared to be two broken traces. it may be the picture or shadow but please can you check where marked in attached.
                          If you keep the board oriented in the direction of the picture and look at C608 in the upper left of the board. Go to Buds redline of the picture and look above the number 4 that he placed on the picture. The second location is on the far middle right of the board next to a large black arrow at D331 also look at the scratch across the black arrow to see if that could be a problem. Copper is showing thru.
                          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

                          • killian6pk
                            Badcaps Veteran
                            • Apr 2010
                            • 502
                            • USA

                            #53
                            Re: Vizio E321VL

                            Originally posted by budm
                            I need closed up pictures of the bottom side of the board acround the pfc ic and the SMPS IC so I can trace out the connections, also need the cloased up pictures of the connector on the power supply board so i can see the lables on them, I need to find ot which pin is PS_ON pin, this will be the next step.
                            Ok I will work on those for you. Back in a few minutes.
                            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

                            • killian6pk
                              Badcaps Veteran
                              • Apr 2010
                              • 502
                              • USA

                              #54
                              Re: Vizio E321VL

                              Originally posted by budm
                              I need closed up pictures of the bottom side of the board acround the pfc ic and the SMPS IC so I can trace out the connections, also need the cloased up pictures of the connector on the power supply board so i can see the lables on them, I need to find ot which pin is PS_ON pin, this will be the next step.
                              Attached are the pictures you wanted. Kind of gloomy outside today so I hope this is clear enough.
                              On the Inverter Connector picture Pin one is at the top.

                              On the Main Board Connector Pin one is at the bottom.
                              Attached Files
                              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

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #55
                                Re: Vizio E321VL

                                OK, I will look at the pictures tonight, I cannot find any info on that PFC IC P/N L100 either, it may be difficuit to figure out the VCC pin of that IC, will see after I look at the pictures.

                                OK, picture#3 post 54, CN101 Pin 11 is PS_ON PIN, please check the voltage onthat pin, it should be around 3VDC or higher when TV is switched on.
                                Last edited by budm; 06-04-2012, 03:57 PM.
                                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

                                • selldoor
                                  Slow Learner
                                  • Dec 2010
                                  • 7870

                                  #56
                                  Re: Vizio E321VL

                                  Originally posted by killian6pk
                                  If you keep the board oriented in the direction of the picture and look at C608 in the upper left of the board. Go to Buds redline of the picture and look above the number 4 that he placed on the picture. The second location is on the far middle right of the board next to a large black arrow at D331 also look at the scratch across the black arrow to see if that could be a problem. Copper is showing thru.
                                  The repairs look ok and the scratch is not a problem. Its getting late here now, Im off to bed. If you get a chance check out the trace damage if there is any, by doing an ohms test between joints along the trace.
                                  Please upload pictures using attachment function when ask for help on the repair
                                  http://www.badcaps.net/forum/showthread.php?t=39740

                                  Comment

                                  • killian6pk
                                    Badcaps Veteran
                                    • Apr 2010
                                    • 502
                                    • USA

                                    #57
                                    Re: Vizio E321VL

                                    Originally posted by budm
                                    OK, I will look at the pictures tonight, I cannot find any info on that PFC IC P/N L100 either, it may be difficuit to figure out the VCC pin of that IC, will see after I look at the pictures.

                                    OK, picture#3 post 54, CN101 Pin 11 is PS_ON PIN, please check the voltage onthat pin, it should be around 3VDC or higher when TV is switched on.
                                    It is 0.0V using common to ground pin on that connector and also to the ground screw by the AC Input.
                                    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

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #58
                                      Re: Vizio E321VL

                                      OK, you do not have the PS_ON signal from the main baord when you trun on the TV, that is why the PFC and the 12/24 Vdc power supply do not turn on. So we need to find out where the fault is on the main board.
                                      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

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #59
                                        Re: Vizio E321VL

                                        You may want to read this thread also:
                                        https://www.badcaps.net/forum/showth...t=19666&page=3
                                        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

                                        • selldoor
                                          Slow Learner
                                          • Dec 2010
                                          • 7870

                                          #60
                                          Re: Vizio E321VL

                                          Maybe re check pson test as in
                                          https://www.badcaps.net/forum/showpo...2&postcount=26
                                          Please upload pictures using attachment function when ask for help on the repair
                                          http://www.badcaps.net/forum/showthread.php?t=39740

                                          Comment

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