manuel432

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  • manuel432
    Member
    • Sep 2012
    • 11
    • la

    #1

    manuel432

    ns-l37q-10a mainboard 715g-3269-1 i need to chek the volts from the mainboard to the t-com board i dont kwno haw to optain the information,
    the firs 4 pins show 12 v the rest 1v +- or 0.
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: manuel432

    The T-CON board will have surface mounted fuse on it, since you are getting 12 from the main board to the T-CON, next thing will have to find out if the fuse on the T-CON board is good or not. The other pins of the T-CON are small signals that you will need the scope to see.
    By the way, what is the problem with this TV? Brand?
    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

    • manuel432
      Member
      • Sep 2012
      • 11
      • la

      #3
      Re: manuel432

      the brand is a insignia ns-37q-10a power board is good all volts goin to the
      mainbord are good, in the dark the lcd fires up for 3 or 4 seconds, and the
      the please whait comes on and a faint liaght wheare the t-com board is
      located stay on for 2 more seconds,it comes from a blue diode on the t-com board that light up very bright blue and go off.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: manuel432

        Boy, I never seen LED on the T-CON board before.
        So the backlights go away or they stay on but no pictures on the screen?
        Do you get any sound?
        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

        • manuel432
          Member
          • Sep 2012
          • 11
          • la

          #5
          Re: manuel432

          no i dont have any sound at all, I had sound at the beging when the problem stared, then it whent awy after i mess whid it, I toock the back cover off
          moved some comection put it al back and it work for a few hourd and it
          stop working at all. please the t-com board # is 6870c-0247a i was thinking
          to buy a new t-com bord when i save the mony but i don know if is that the problem i dont whant to spend the mony if is not nessesary.
          and last where is the fuse on the board located????.

          manuel432

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: manuel432

            Please take good pictures of the T-CON board and use Go Advanced to attach the pictures.
            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

            • manuel432
              Member
              • Sep 2012
              • 11
              • la

              #7
              Re: manuel432

              I toock some pictures, let see if i do this right.
              Attached Files

              Comment

              • Mr Bill
                Badcaps Veteran
                • Nov 2011
                • 648
                • USA

                #8
                Re: manuel432

                The fuse on the tcon is in the lower left corner of the picture (F1). I did notice that D5 looks burnt. Is it crispy?
                Attached Files

                Comment

                • kevinm34232
                  Badcaps Legend
                  • May 2012
                  • 1884
                  • USA

                  #9
                  Re: manuel432

                  I would agree, look at D4 looks very different.

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #10
                    Re: manuel432

                    Check the fuse, those two Diode for the dual switching power suppliers. Check the voltages of the US4 1.8V regulator (look at the VCC1.8V pad next to the regulator), the P12V and the VCC test pads.
                    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

                    • manuel432
                      Member
                      • Sep 2012
                      • 11
                      • la

                      #11
                      Re: manuel432

                      I check the fuse and it check good, check the diodes set the meter dial to
                      diode k2 the red lead at the white band of the diode and got .583 _+1
                      reverse the leeds and got .091_+1 on D4. did the same for D5 and got 0 no
                      reading at all, reverse the leads got.098_+1it seems that I have to replace
                      D5 but I dont have a schematic of the board I dont know the value of the diode or part # or were to buy it they are very small about less than a 1/8"
                      of a inch by 2/8" long they have a # 3197 on top( help on this ) about the
                      regulator do they have the #220 E3 on top end,? how do I check them, they
                      have for legs do I check them up and down or across the legs whid the power
                      on the board (help on this to.) and the vvc pad is that the small square on the bord nex to it.
                      Last edited by manuel432; 10-11-2012, 11:32 AM. Reason: forgot about the pad.

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #12
                        Re: manuel432

                        Just check the voltages at the pad as suggested in post10
                        "look at the VCC1.8V pad next to the regulator), the P12V and the VCC test pads"
                        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

                        • manuel432
                          Member
                          • Sep 2012
                          • 11
                          • la

                          #13
                          Re: manuel432

                          hi!!! had time to work on the t-com as per instruction I check as you said
                          the 12v pad check out good 12V . the regultor pad checks 1.8V. the us4 leg in 3.25V w/ground at the Tv frane, w/ ground at the base of the regulator is 1.45 V and the out of the regulator 1.8V.
                          Sorry I did not have time to work at all this weakend.
                          manuel432.

                          Comment

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