Sony KD65X85005C, no boot, hdmi IC suspected

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  • Davi.p
    Hobbist Tech
    • Sep 2009
    • 4308
    • Italy - Milan

    #21
    Re: Sony KD65X85005C, no boot, hdmi IC suspected

    In your second picture on the right bottom corner there is a 4 pins unpopulated connector, that is almost surely a serial port, make a picture of that area only, but anyway 1 pin is gnd, at the side, the other side is 5v output, if your adapter doesn't need it dont connect it, the center 2 pins are tx , rx, you must probe at tv start which one has a tension, that is tx and must be connected to rx of adapter. Then set the port at 112500 and open terminal in pc, start tv and watch characters come in, if them are readable, speed is ok if not change speed to a lower. Found the log , turn off tv, set the terminal to record the text, start tv again until it stops sending, then close the file , turn off and upload here the txt file.

    Comment

    • Formaster
      Senior Member
      • Jul 2021
      • 68
      • Switzerland

      #22
      Re: Sony KD65X85005C, no boot, hdmi IC suspected

      Originally posted by Davi.p
      In your second picture on the right bottom corner there is a 4 pins unpopulated connector, that is almost surely a serial port, make a picture of that area only, but anyway 1 pin is gnd, at the side, the other side is 5v output, if your adapter doesn't need it dont connect it, the center 2 pins are tx , rx, you must probe at tv start which one has a tension, that is tx and must be connected to rx of adapter. Then set the port at 112500 and open terminal in pc, start tv and watch characters come in, if them are readable, speed is ok if not change speed to a lower. Found the log , turn off tv, set the terminal to record the text, start tv again until it stops sending, then close the file , turn off and upload here the txt file.
      Did you mean these 4? Just for sure i have that programmer below. Hope its ok.
      Attached Files

      Comment

      • Davi.p
        Hobbist Tech
        • Sep 2009
        • 4308
        • Italy - Milan

        #23
        Re: Sony KD65X85005C, no boot, hdmi IC suspected

        Yes CN8004, pins are 5 but 2 are gnd. The programmer is ok, must be know how to set in serial mode, yellow jumper go to pins 2-3 i think.

        Comment

        • Formaster
          Senior Member
          • Jul 2021
          • 68
          • Switzerland

          #24
          Re: Sony KD65X85005C, no boot, hdmi IC suspected

          Originally posted by Davi.p
          Yes CN8004, pins are 5 but 2 are gnd. The programmer is ok, must be know how to set in serial mode, yellow jumper go to pins 2-3 i think.
          yes, 2-3 is TTL serial. Tomorrow will check it... Big reputation, thank you

          Comment

          • Formaster
            Senior Member
            • Jul 2021
            • 68
            • Switzerland

            #25
            Re: Sony KD65X85005C, no boot, hdmi IC suspected

            Originally posted by Davi.p
            which one has tension
            On pin X measured 144mV, on pin Y is 157mV. Is it must be correct?

            Comment

            • Davi.p
              Hobbist Tech
              • Sep 2009
              • 4308
              • Italy - Milan

              #26
              Re: Sony KD65X85005C, no boot, hdmi IC suspected

              What is pin X? You have two pins to measure, one is tx from where you can see data sent by the microprocessor, the other is for receive so it must be free from potential i think, unless there is a pullup, anyway this test is not so useful, you can simply swap the wires if you don't see data in.. but keep in mind some brands like Samsung needs the port to be activated for debug but this is enabled via service menu and you don't have access to that..

              Comment

              • lotas
                Badcaps Legend
                • Jan 2016
                • 4562
                • Russia

                #27
                Re: Sony KD65X85005C, no boot, hdmi IC suspected

                You need to install zero resistances or jumpers.
                Attached Files

                Comment

                • Formaster
                  Senior Member
                  • Jul 2021
                  • 68
                  • Switzerland

                  #28
                  Re: Sony KD65X85005C, no boot, hdmi IC suspected

                  been unlucky, maybe debugging must be turn on via service menu. Soldered jumpers between, after double checked the curcuits, but no voltage on both.

                  Other way to check the nand is JTAG, while don't want to buy an expensive emmc reader. I just found this tutorial, but on the programmer what i have, it has no CMD, LSP BV and D0 pins. Am i wrong?

                  Here is the JTAG points down below
                  Attached Files
                  Last edited by Formaster; 08-22-2021, 02:40 AM.

                  Comment

                  • lotas
                    Badcaps Legend
                    • Jan 2016
                    • 4562
                    • Russia

                    #29
                    Re: Sony KD65X85005C, no boot, hdmi IC suspected

                    It's not NAND, you have an EMMC.

                    Comment

                    • Davi.p
                      Hobbist Tech
                      • Sep 2009
                      • 4308
                      • Italy - Milan

                      #30
                      Re: Sony KD65X85005C, no boot, hdmi IC suspected

                      Can you show us a photo of the jumpers?

                      Comment

                      • Formaster
                        Senior Member
                        • Jul 2021
                        • 68
                        • Switzerland

                        #31
                        Re: Sony KD65X85005C, no boot, hdmi IC suspected

                        Originally posted by Davi.p
                        Can you show us a photo of the jumpers?
                        Curcuits ok and pins not shorted.
                        Attached Files

                        Comment

                        • Davi.p
                          Hobbist Tech
                          • Sep 2009
                          • 4308
                          • Italy - Milan

                          #32
                          Re: Sony KD65X85005C, no boot, hdmi IC suspected

                          Forgot to tell that must be connect tx, rx, and gnd .. is it so for you?

                          Comment

                          • Formaster
                            Senior Member
                            • Jul 2021
                            • 68
                            • Switzerland

                            #33
                            Re: Sony KD65X85005C, no boot, hdmi IC suspected

                            Originally posted by Davi.p
                            Forgot to tell that must be connect tx, rx, and gnd .. is it so for you?
                            GND tooked from one of the 4 big square pin directly from board. Is it false? (looks like the pins take from there too)
                            Last edited by Formaster; 08-22-2021, 06:35 AM.

                            Comment

                            • Formaster
                              Senior Member
                              • Jul 2021
                              • 68
                              • Switzerland

                              #34
                              Re: Sony KD65X85005C, no boot, hdmi IC suspected

                              Guys we are wrong, found a schematics. Thats a blind miniUSB port. Under the link is the schematics from site 184-187 if somebody else need it. I will chech it.

                              link: https://drive.google.com/file/d/1slO...R0EuDrVdQ/view

                              need to be downloaded and you can able to zoom in normal PDF viewers.

                              Comment

                              • Davi.p
                                Hobbist Tech
                                • Sep 2009
                                • 4308
                                • Italy - Milan

                                #35
                                Re: Sony KD65X85005C, no boot, hdmi IC suspected

                                Try Cn8301 pins 18,19+gnd

                                Comment

                                • Formaster
                                  Senior Member
                                  • Jul 2021
                                  • 68
                                  • Switzerland

                                  #36
                                  Re: Sony KD65X85005C, no boot, hdmi IC suspected

                                  did'nt success... Soldered the MB tx to programmer rx, but no data. Checked few rates also and curcuits are ok. putty correct so?
                                  Attached Files

                                  Comment

                                  • Formaster
                                    Senior Member
                                    • Jul 2021
                                    • 68
                                    • Switzerland

                                    #37
                                    Re: Sony KD65X85005C, no boot, hdmi IC suspected

                                    Originally posted by Davi.p
                                    Try Cn8301 pins 18,19+gnd
                                    18 need it too? I thought MB RX is to receive data's.

                                    Comment

                                    • Davi.p
                                      Hobbist Tech
                                      • Sep 2009
                                      • 4308
                                      • Italy - Milan

                                      #38
                                      Re: Sony KD65X85005C, no boot, hdmi IC suspected

                                      seems all correct... try swap 18-19

                                      Comment

                                      • Formaster
                                        Senior Member
                                        • Jul 2021
                                        • 68
                                        • Switzerland

                                        #39
                                        Re: Sony KD65X85005C, no boot, hdmi IC suspected

                                        swapped, also on the adapter side, did nothing where i'm wrong ...

                                        Comment

                                        • Davi.p
                                          Hobbist Tech
                                          • Sep 2009
                                          • 4308
                                          • Italy - Milan

                                          #40
                                          Re: Sony KD65X85005C, no boot, hdmi IC suspected

                                          Try to find on the main board a chip of approximately 14pins , sometimes it is marked GD75xxx, or MAX2323, or search its datasheet, it can be a level shifter that adapts internal low volt to a standard 12v uart, in this case a pc with RS232 port or an usb adapter is needed.

                                          Comment

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