How to find the serial communication location of Sony TV KD-55X8000C motherboard to read printing information

[yangliao]

Hello everyone, I met a Sony motherboard KD
-55X8000C model, the serial port location cannot be found. I want to read the printing information through the serial port. I don't know if this idea is feasible. I hope friends who know more can answer it to clear up my doubts. Thank you in advance!

[Davi.p]

Near the optical out there are 4 pads in a row, gnd, rx, tx, 5v (swap rx,tx eventually)

[yangliao]

Hello, I wired the wiring according to this diagram, but the mainboard and the programmer cannot communicate. I don’t know which link is the problem.

[Davi.p]

yes, of course, big error, you must always connect gnd wire.. , again try first, if no go swap tx,rx..first speed to try is 115200bps then decrease if necessary

[Diah]

Wrong wiring and location .. UART RX / TX always connected to R.

[Davi.p]

why you tinned the 5v+ pole? it is not needed..