I see that there's a copper jumper on the Audio Shield board on connector pin 13 and it looks like it ultimately connects to pin 25 of the SGTL5000 signal I2S_DOUT. The 3.6 schematic shows pin 13 connected to the 3.6's LED. It looks like the 3.6 is driving into an output on the SGTL5000. Perhaps I did something wrong tracing this out. Can someone explain the intent for the jumper on the Audio Shield PC board copper jumper trace connected between pin 13 of the audio shield and pin 25 of the SGTL5000? I'm having a problem with the headphone audio output disappearing after a few seconds after power up. The 3.6 LED starts out bright and starts to flicker and fade coincident with the loss of audio. I'm thinking there's something about that jumper that I'm not understanding that could be causing my issue. In the attached schematic snippet that pin is labeled 'RX' on the SGTL5000, but the link for the SGTL5000 data sheet seems to indicate that pin 25 of the 32 QFN package is I2S_DOUT. I can't read the markings on the package so I can't verify the part against the data sheet.
Thanks.
- AG6GU
Thanks.
- AG6GU