Repair usb-c headphones connector

[Acer444]

My headphones stopped working because of broken wires, I took apart the USB-c connector to resoldier wires but accidentally scratched off the markings on PCB while removing compound and now I have no idea how to soldier 5 wires back in the correct order. Any ideas? The original headphones are for Huawei mate 20 pro smartphone.

[u666sa]

You gotta take out the rest of white gue and ring it to the actual USB-C connector, see what is what.

[DavidAlfa]

Nah, these headphones are way more elaborated,they have they own DAC, I had them.

[u666sa]

If you take off the gue, you will see where the ground is, 3 of them, and where the mic is, left right is going to be hit or miss.

[u666sa]

There is another approach. Find 3 grounds. Then find find left, then find right, by soldering and trying to play music. The remaining one would be mic.

[wasedadoc]

If DavidAlfa is correct that these headphones have their own DAC then there are no analogue signals on the connector and all the above posts by u666sa can be ignored.

[DavidAlfa]

Yes they do, the DAC is in that small board!

[amyk]

Plug it in, play test tone (different frequencies on left and right channels), probe with scope to find the left and right channels and ground.