Element 32le30q

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  • slickrickybobby89
    Senior Member
    • Jul 2016
    • 87
    • america

    #1

    Element 32le30q

    this set has a power supply issue, when the set os turned on everything starts fine. Screen comes on and looks great, then it faults and goes back to standby. I opened up the set and visually inspected the power supply and found a burned up ceramic capacitor it was a 6000v 15p, i swapped it with another i salvaged from another board, fired it up with fingers crossed, and i got the same problem. From there i proceded to disconnect the main board, and jump the pson pin and bkon pins to standbye, when plugged in the power supply powered on, then shut back off, i tried again this time disconnecting the backlights completely, and it still shuts down once powered. I removed the 5v from the bkon pin, and the power supply stayed on, and never faulted, allowing me to test all pins, and all of the voltages are correct. With no power at the backlights as i would assume should happen, since the backlights are not being told to turn on. Also telling me that the backlight circuit is the reason the power supply is faulting. Im still learning my way around a power supply but i am not afraid of testing, can anyone offer some guidance as to where i should look next? I've removed what i believe to be the inverter for testing, but cant find a pinout sheet online, but i do know there is a short between the two marked pins in the photo. Thanks for any offered help, ill be with the set all night if anyone has some free time.
    Attached Files
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Element 32le30q

    DCR of the transformer will show very low resistance.
    So the blue ballast cap you replaced have the same capacitance and Voltage rating?
    If you do not have ALL the working lamps connected, it will trip protection circuit, it will only take one bad lamp to trip the protection circuit.
    Did you also check the resistance of all four blue ballast caps to see if any one of them show leakage resistance?

    https://www.badcaps.net/forum/attach...0&d=1471213443
    You can which which two pins are for the primary.
    Since there is only one inverter transformer, it is hard to know if the secondary side wind is good or not. What resistance do you get on the secondary winding?
    Last edited by budm; 08-14-2016, 05:55 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

    • slickrickybobby89
      Senior Member
      • Jul 2016
      • 87
      • america

      #3
      Re: Element 32le30q

      The only method of testing i have is a DMM, i checked the resistance between the ballast caps and for the top 2 which are 10p 6000v i had around .030nf, i asume that is picofarads, and the other 2, which are 6000v 15p test at .022 nf, as for the inverter, there is no resistance across any pins whatsoever, i measured in ohms, is that correct?

      Comment

      • slickrickybobby89
        Senior Member
        • Jul 2016
        • 87
        • america

        #4
        Re: Element 32le30q

        I get a resistance of 1.5 ohms between the two pins that show shorted, im still not sure how to identify which pins are which on this inverter.

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: Element 32le30q

          https://www.badcaps.net/forum/attach...6&d=1471213443
          The transformer only has one primary winding, those two pins are the primary winding and it will show very low Ohms reading (DCR: DC Resistance), it also has only one winding for the Secondary high Voltage side.
          You can see how the wires are attached to the pins.
          The primary winding of the inverter transformer is being driven by that yellow transformer next to it, if you trace out the connections you can see how they are connected.
          Last edited by budm; 08-14-2016, 09:42 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

          • slickrickybobby89
            Senior Member
            • Jul 2016
            • 87
            • america

            #6
            Re: Element 32le30q

            So should i pull and test the inverter next to it? Based on what you said we can assume the inverter transformer to be good correct? I removed the ballast capacitors in question and placed them into a functioning power supply, and they operated the other power supply, i did this thinking that maybe my dmm is just to low quality to test such a low capacitance, but they appear to be fine. I have also tested mosfets, but they tested fine. Thanks for the help bud.

            Comment

            • slickrickybobby89
              Senior Member
              • Jul 2016
              • 87
              • america

              #7
              Re: Element 32le30q

              I retested the supply, and this time tested the output of the backlights, with them hooked up, i get 18v dc until the backlights actually kick on, when yhe backlights kick on the voltage spikes to 33v, and immediately begins dropping back to 0v, whit the lamps disconected, i get 33v on both outputs, untill it shuts off. Im pulling the tranformer to test now.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: Element 32le30q

                Originally posted by slickrickybobby89
                I retested the supply, and this time tested the output of the backlights, with them hooked up, i get 18v dc until the backlights actually kick on, when yhe backlights kick on the voltage spikes to 33v, and immediately begins dropping back to 0v, whit the lamps disconected, i get 33v on both outputs, untill it shuts off. Im pulling the tranformer to test now.
                Are you testing the DCV on the HV connectors CON5, CON6?
                Do not do that, when the circuit is working you will have about 2000VAC on the HV connectors, and you can easily blow out the meter.
                Can we see the pictures of the whole backside of the TV showing all the boards and how they are connected together?
                There are so many versions of this model.
                http://www.shopjimmy.com/catalogsear...lement+32le30q

                Which version of the power supply do you have?

                OK, it looks like you have version 3.1 Power supply based on you pictures.
                Last edited by budm; 08-15-2016, 09:45 AM.
                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

                • slickrickybobby89
                  Senior Member
                  • Jul 2016
                  • 87
                  • america

                  #9
                  Re: Element 32le30q

                  I have version 3.1, im also posting a closeup of the area where the original damage occured, notice the discolored connector, and the 2 newer blue ceramic capacitors. I did verify that the replacement was the exact same part before replacing, both were stamped 15j 6kv, if im correct that means 6000v 15 picofarads.

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #10
                    Re: Element 32le30q

                    Originally posted by slickrickybobby89
                    I have version 3.1, im also posting a closeup of the area where the original damage occured, notice the discolored connector, and the 2 newer blue ceramic capacitors. I did verify that the replacement was the exact same part before replacing, both were stamped 15j 6kv, if im correct that means 6000v 15 picofarads.
                    That is correct, 15pF 6000V.
                    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

                    • slickrickybobby89
                      Senior Member
                      • Jul 2016
                      • 87
                      • america

                      #11
                      Re: Element 32le30q

                      How do i identify this transformer, if that's what it is, i tried looking this part # up online and, i can't find anything relevant.
                      Attached Files

                      Comment

                      • slickrickybobby89
                        Senior Member
                        • Jul 2016
                        • 87
                        • america

                        #12
                        Re: Element 32le30q

                        Thank you bud, i know this isn't a set that is really all that valuable, but i am trying to teach myself the basics of electronics, and this is helping me to understand/identify what each component is doing or supposed to be doing. Your knowledge has helped me a great lot the last few weeks. I have no teacher lol.

                        Comment

                        • vinceroger69
                          Badcaps Legend
                          • Mar 2012
                          • 6714
                          • uk

                          #13
                          Re: Element 32le30q

                          Budm Could a failing/failed ccfl tube cause this?

                          Comment

                          • budm
                            Badcaps Legend
                            • Feb 2010
                            • 40746
                            • USA

                            #14
                            Re: Element 32le30q

                            Can I get a straight shot pictures of the bottom side of the board?
                            This one is cutout and dark on the edge.
                            https://www.badcaps.net/forum/attach...3&d=1471213443
                            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

                            • slickrickybobby89
                              Senior Member
                              • Jul 2016
                              • 87
                              • america

                              #15
                              Re: Element 32le30q

                              Bottom side pics
                              Attached Files

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #16
                                Re: Element 32le30q

                                Hmm, the pictures were taken before the Inverter transformer (T302) is removed?
                                I also see that you unsolder the Standby power transformer pins.
                                Last edited by budm; 08-15-2016, 11:35 AM.
                                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

                                  #17
                                  Re: Element 32le30q

                                  This is what I have so far.
                                  Picture provided by shopjimmy.
                                  Attached Files
                                  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

                                  • slickrickybobby89
                                    Senior Member
                                    • Jul 2016
                                    • 87
                                    • america

                                    #18
                                    Re: Element 32le30q

                                    Is there any way to tell if it might be the backlights and not actually the board? I hadn't considered the bulbs being bad, i assumed power board because of the blown capacitor.

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #19
                                      Re: Element 32le30q

                                      Not easy to test the LAMP in the LCD panel since you cannot see what the ends of the lamps look like, they turn black when lamps are worn out or light up with pink glow.
                                      See post 11 for example.
                                      https://www.badcaps.net/forum/showth...631#post680631
                                      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

                                      • slickrickybobby89
                                        Senior Member
                                        • Jul 2016
                                        • 87
                                        • america

                                        #20
                                        Re: Element 32le30q

                                        Ok, i will build this with and old bulb i have, the one question i have about it though, is on my setup, i have single wires for the lcds power, both are similar, when i attempt to power the circuit, should i use one wire to each side? Or do i need to build 2 test bulbs and hook them up independenly?

                                        Comment

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