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Sony NSX-46GT1(Google TV) 2 x error code

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    Sony NSX-46GT1(Google TV) 2 x error code

    I have picked this TV up and when I turn it on nothing shows on the screen, the LED turns green for a couple of seconds and the that throws the 2 x error code.
    I haven't repaired to many LED TVs, so I'm not sure where to start.
    I have the standby voltage of 3.3V, power on is 3.3V and when I turn it on it drops to 0V.
    At the LEDs I'm not sure what should I get and how should I measure. From ground, one of them shows 200V and the other 3.6V. When I turn it on the 200V goes to around 230V then keeps dropping.
    The 3.6V one, it's hard to say(maybe I should use Min/Max), but shows negative voltages and for a second goes high-~200? then dropps back to -45V and keeps dropping.
    At this line(3.6V), some LED could be out?
    Any help would be appreciated.

    #2
    Re: Sony NSX-46GT1(Google TV) 2 x error code

    Hello,

    2 blinks is a power supply fault. There is 2 transistors that short and a fuseable resistor that opens. Sometimes the ic that drives the transistors need to be replaced as well. I'll try to find exact component locations later today for you.

    Comment


      #3
      Re: Sony NSX-46GT1(Google TV) 2 x error code

      There is a kit available at shopjimmy. Maybe it is easier to show me which one is from there. In there kitthey have a bunch of parts. Some of them I have checked and they seemed fine.

      Comment


        #4
        Re: Sony NSX-46GT1(Google TV) 2 x error code

        So usually it is fuseable resistor r6536 it should ready very low resistance. The q6101 and q6102 are usually short which cause that fuseable resistor to open. I do usually just buy the shopjimmy kit as it has all the parts needed to repair the fault and I had a hard time finding the ic that drive the transistors.

        Comment


          #5
          Re: Sony NSX-46GT1(Google TV) 2 x error code

          I have tested that fusible resistor and it shows 0.06, transistors look good to me.
          I have not tested the ICs, but I'm leaning toward bad LED.
          I have opened the line at each LED plug and I'm measuring 23,xx mA at one strip and 15,xx mA at the other strip, using Min/Max feature.
          How much should be there? I remember, Bud showing in a picture, 300 mA. It matters, which wire do I measure?
          There are OUt #1 and OUt#2. I have measured, pins #2 at both connectors.
          Last edited by tibimakai; 07-09-2015, 08:41 PM.

          Comment


            #6
            Re: Sony NSX-46GT1(Google TV) 2 x error code

            There's no set figure. Every set is different. The best you can hope for is to find a panel datasheet for your panel which gives you voltage and current figures for the backlight. Try searching here under "Panels":
            http://www.toms-service-manuals.com/
            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


              #7
              Re: Sony NSX-46GT1(Google TV) 2 x error code

              Is this your board?
              http://assets.shopjimmy.com/media/ca.../147424511.jpg
              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


                #8
                Re: Sony NSX-46GT1(Google TV) 2 x error code

                Yes.
                I have added the LED output location.
                There is a connector, that has wires going into both LEDs. So the line can be broken from there, but I don't really understand how is connected, because it is inside the panel.
                I'm adding a picture, found on Ebay about this connector.
                Bellow it, there are the two LED connectors, going into the power supply board.
                Attached Files
                Last edited by tibimakai; 07-10-2015, 12:24 PM.

                Comment


                  #9
                  Re: Sony NSX-46GT1(Google TV) 2 x error code

                  Any ideas, on what to check?

                  Comment


                    #10
                    Re: Sony NSX-46GT1(Google TV) 2 x error code

                    I have forced the power supply to turn on, with two resistors and at the LED connector CN6800 I'm getting 175V-both wires-, at CN6801 I'm getting 2.2V and 3V. Even with the disconnected connector, the voltage is around 6V, at CN6801.
                    So, I need to work on the power supply, which is better news, than taking apart the screen.
                    There are two LV5768, one for each channel and two ATP212 FETs. FETs don't seem shorted.
                    Last edited by tibimakai; 07-14-2015, 10:25 PM.

                    Comment


                      #11
                      Re: Sony NSX-46GT1(Google TV) 2 x error code

                      The two LED connectors should supply the same voltage, right? I'm guessing, since one has 175V, then the other one should have the same voltage, right?

                      Comment


                        #12
                        Re: Sony NSX-46GT1(Google TV) 2 x error code

                        Not always - could be a different number of LEDs on each group of strips.
                        Equal voltage is the most common, but it's not always the case.
                        Did you find your panel number?
                        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


                          #13
                          Re: Sony NSX-46GT1(Google TV) 2 x error code

                          I did not find a part number.
                          There is only one sticker and I don't believe it's the part number.
                          SCC October 2010
                          NSX-46GT1 SV-16773(U) 00
                          WO- 150004577
                          BAR CODE
                          *12-8036803*
                          The only board that I have not removed yet, is the T-con board.
                          I may have to remove that as well.

                          Comment


                            #14
                            Re: Sony NSX-46GT1(Google TV) 2 x error code

                            So that sticker on the back of the panel that looks exactly like a Samsung/SLCD panel sticker, with the two barcodes, is not?
                            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


                              #15
                              Re: Sony NSX-46GT1(Google TV) 2 x error code

                              http://www.shopjimmy.com/sony-1-857-...-con-board.htm

                              Panel Sticker Number: LTY[Z]460HM03-001
                              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


                                #16
                                Re: Sony NSX-46GT1(Google TV) 2 x error code

                                I will check it again, in a few, but I believe that Bud is right.
                                I have seen that code somewhere.
                                At shopjimmy, there is only one T-con board and one mainboard, so it must be that number.
                                Last edited by tibimakai; 07-17-2015, 03:16 PM.

                                Comment


                                  #17
                                  Re: Sony NSX-46GT1(Google TV) 2 x error code

                                  Datasheet:


                                  The WLED parameters are on page 9.
                                  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


                                    #18
                                    Re: Sony NSX-46GT1(Google TV) 2 x error code

                                    This may be some help in the future for older SONY TVs, may be TOM can upload to his site.
                                    https://www.badcaps.net/forum/showpo...&postcount=192
                                    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


                                      #19
                                      Re: Sony NSX-46GT1(Google TV) 2 x error code

                                      I couldn't find it there, but I have found it online.
                                      At the 4 pin connector, at pin #1 and #2, I should have 212 VDC.
                                      At the connector with 5 pins at pin#1 and #2 is the feedback.(p.#15)
                                      Definitely, I don't have 212 V there, the most is 178 V.
                                      Maybe some capacitors causing this?
                                      Last edited by tibimakai; 07-17-2015, 03:34 PM.

                                      Comment


                                        #20
                                        Re: Sony NSX-46GT1(Google TV) 2 x error code

                                        Is this your power supply board?
                                        http://www.shopjimmy.com/sony-1-474-...-ge6-board.htm
                                        It looks like the panel uses one big long sting of LEDs (the two strings are connected in series at the power supply/LED driver board), I can see one current sensing resistor, one Power MOSFET (Q681?) for the LED PWM, one boost conveter inductor L6800.
                                        Picture provided by shopjimmy.
                                        Need good pictures of the bottom side of the board, especially around the LED driver section.
                                        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

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