Reply To: Help With Audio Upgrade Board

[samson7point1]

Morpheus_79, thank you so much, that was just the information I needed to spot the gap in my understanding – everything is working perfectly now!

I tested continuity to the SCART conductors _before_ I removed the board and never re-tested them because I thought getting analog audio confirmed that they were connected. The process of removing the board weakened two of the wires (I really am going to stop using 30 AWG wrapping wire for stuff like this). When I went in to take pictures of the board and re-test continuity I found that the solder joints were fine but the wires had weakened on the ends, broken loose and were just loosely resting against the SCART conductors.

So the first mistake I made was not fully cutting those traces (because I eyeballed it instead of checking continuity) and the second was not re-testing continuity of all of the other connections AFTER reassembly.

What’s ironic is that I should have known better about the analog audio thing. I don’t know jack about electrical engineering so portions of it still seem like black magic to me, but in hindsight this was obvious. I had to refer to the 1.5 PCB diagram to figure out which pin on the IT6613 was the I2S so I could bypass the lifted pad, and I saw that all three of those traces were put to ground, but I didn’t realize what I was looking at until you said something.

Again, thanks for your advise, it was exactly what I needed!