NC in this case is No Connection. It is listed in the revision history of the schematics. https://files.pine64.org/doc/PinePhone/P...ematic.pdf
It's just below U700 https://files.pine64.org/doc/PinePhone/P...191031.pdf
Have not seen anyone actually do it.
https://wiki.pine64.org/wiki/PinePhone_1...rdware_Fix
Found this image http://www.zuendmasse.de/files/pinephone-pcb-r1318.png
There are a few more in the folder. Don't know whose it is, or if it was successful.
It's just below U700 https://files.pine64.org/doc/PinePhone/P...191031.pdf
Have not seen anyone actually do it.
https://wiki.pine64.org/wiki/PinePhone_1...rdware_Fix
Found this image http://www.zuendmasse.de/files/pinephone-pcb-r1318.png
There are a few more in the folder. Don't know whose it is, or if it was successful.