Insignia 26" power board need help

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #21
    Re: Insignia 26" power board need help

    If you look at the 12v POWER SUPPLY section, that transformer only has one winding for the 12v output, one end of the winding is tied to ground, another end is tied to the Common Cathode TO-220 case rectifier D950, the center pin output is connected to first filter cap and the inductor, the output side of the inductor is connected to another filter cap, this connection is then connected to one of the pin of the 12v output pin. Please look at the bottom of the board again and check that 12v on the connector.
    You are not going to have any 24v since that IC is blown, you can also take out that MOSFET for that 24v and check.
    You can expect the inverter board to go out in the future, too many transformers and fuses I had to replace in the CHIMEI inverter board. When you repair more than a thousand TV and monitors, you will see the pattern of what usually failed.
    Bad lamp wiring, yes,I fixed many of them also. It happens in all brand.
    http://s807.photobucket.com/albums/y...klight%20lamp/
    Main thing right now is to find out the P/N of that blown IC, without it, you will not get far. I already circle the MOSFET of the 24v power supply.
    Last edited by budm; 10-14-2012, 10:50 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

    • infringer
      Badcaps Member
      • Sep 2009
      • 244
      • United Frickin States

      #22
      Re: Insignia 26" power board need help

      The IC appears to be very similar if not the exact same thing as the other one on the bottom of the board ... IDK gotta check into it a bit further there are other projects deserving attention as well but gotta stick to this one as well.

      Again thanks and by the way I never doubted you just stated that I do have +5v but do not have +12v
      Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

      Comment

      • infringer
        Badcaps Member
        • Sep 2009
        • 244
        • United Frickin States

        #23
        Re: Insignia 26" power board need help

        IDK but to me it appears that this may work to replace the IC could be wrong here but been searching and have not turned up much else.
        Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #24
          Re: Insignia 26" power board need help

          The board of this thread is not the same as your board at all:
          https://www.badcaps.net/forum/showth...621#post274621
          The 117012 is not made for driving the MOSFET setup for your board.
          What is this Insignia model number? The dash after the model number is for that year model.
          i.e. NS-LCDVD26-09
          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

          • infringer
            Badcaps Member
            • Sep 2009
            • 244
            • United Frickin States

            #25
            Re: Insignia 26" power board need help

            yes correct made in 09
            Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #26
              Re: Insignia 26" power board need help

              The one I have, NS-LCDVD26-09, which has DVD player built-in does not use the same board as yours. So it looks like we will have to wait and see if anyone here has the same board as yours.
              This the one you have:
              http://www.shopjimmy.com/insignia-ad...upply-unit.htm

              This is the one I have:
              http://www.shopjimmy.com/megmeet-mip...t-inverter.htm
              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

              • infringer
                Badcaps Member
                • Sep 2009
                • 244
                • United Frickin States

                #27
                Re: Insignia 26" power board need help

                Ok well to make a long story short I found a psu for 27.99 ... After digging to try to find the chip I found out some useful information last night and purchased my power board. But for reference I will let you know this...

                FOUND IN MODEL #'S:
                ENVISION L32W961
                INSIGNIA NS-L32Q-10A
                INSIGNIA NS-L32Q09-10A
                INSIGNIA NS-LCD32-09
                VIZIO VA320M

                This power board is used for all of these TV's as you said in your case it may slightly differ but in my case it seems to hold true with the exception of the first model listed but other people swear this board is used in the that model so I will leave it there as an Xref.

                Hopefully the power board is the only issue I've already spent about a combined 60bux on parts and the board a hefty price for a TV only worth about a hundred bux in my eyes... Anyhow please do not remove this thread as there is a lot of good informational stuff here for people to reference.

                And thanks for the help hopefully this helps a hundred other people.
                Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #28
                  Re: Insignia 26" power board need help

                  I hope it is the right board, shopjimmy does not list those 32" model for the power supply 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

                  • infringer
                    Badcaps Member
                    • Sep 2009
                    • 244
                    • United Frickin States

                    #29
                    Re: Insignia 26" power board need help

                    U may be right I may have copied the wrong models in any case the power board number should find you the right thing as you listed I can no longer edit my posting above so hopefully they read this good catch... I did see the xrefs last nite but it was a late one oh well I will just say go by the board number and enjoy.
                    Last edited by infringer; 10-17-2012, 07:59 PM.
                    Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

                    Comment

                    • infringer
                      Badcaps Member
                      • Sep 2009
                      • 244
                      • United Frickin States

                      #30
                      Re: Insignia 26" power board need help

                      Well yes I screwed up copying the information and bought the wrong thing not the first time a late night shopping venture went south I am half tempted just to run jumper wires and make it work its just a power supply supply voltages they should have went with a standard for power supplies in TV's like they did in computers ATX for example there should have been a TV-ATX standard that was adhered to seeing how common power boards go out ...

                      Anyways so I got this 32" power board it has nearly the same two 8pin IC's are on it ...

                      The one in question is the LD7522PS do you think that this would be what I need a Pulse Width Modulator IC ? If so I can order these chips fairly cheap so if this seems correct let me know it may differ IDK... The other 8pin chip matches exactly the remaining 8 Pin chip. So I am assuming that this chip should be the same as well I know it is bad to assume but based on my assumption I figure I could either get somewhere or stand corrected.
                      Attached Files
                      Last edited by infringer; 10-20-2012, 11:47 AM. Reason: Still Need Help
                      Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

                      Comment

                      • infringer
                        Badcaps Member
                        • Sep 2009
                        • 244
                        • United Frickin States

                        #31
                        Re: Insignia 26" power board need help

                        I pulled two chips off the board I need to learn how to properly test these with a digital multi meter if possible....

                        I know for the N channel mosfet there is GDS or Gate Pin 1 Drain Pin 2 and Source Pin 3...
                        ST P10NK70ZFP

                        So set meter to Diode Test.
                        Put black probe on pin 3 or Source.
                        Put red probe on pin 2 or Drain.
                        You should read nothing. (But I read and get a beep .003)
                        Took red probe off Pin 2 Drain.
                        Touched to pin 1 Gate
                        Then back to pin 2 Drain with Red Probe.
                        Should read something more but it does not.

                        The other Schottky Barrier Diode Rectifier 60v 15A SB150 06 8C4? Dunno if proper but them are the numbers IDK How to properly test I guess...

                        I want to get this right and figure out how to properly test similar to testing a diode, bridge rectifier, or transistor ...

                        I guess I need that info or maybe its not possible IDK I wanna get this thing running without investing too darn much more loot in it already screwed myself should have just got a used TV at this rate so the education will make it worth it.

                        EDITED IMAGE ATTACHED
                        Attached Files
                        Last edited by infringer; 10-20-2012, 02:20 PM.
                        Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

                        Comment

                        • infringer
                          Badcaps Member
                          • Sep 2009
                          • 244
                          • United Frickin States

                          #32
                          Re: Insignia 26" power board need help

                          Thanks for the help looks like I need a new board for sure one of the pads came off of the SMT IC if it were mine I'd rig it and get it working but it is not so I will have to opt for a board but because it is my screw up I gotta replace it at my own expense. The fun of electronics repair...
                          Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.

                          Comment

                          • RonHarvey2
                            New Member
                            • Oct 2015
                            • 1
                            • U.S.

                            #33
                            Re: Insignia 26" power board need help

                            Don't know but the C940 cap in that picture looks like it has a bad solder connection.

                            Comment

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