So I'm having this weird problem where the audio section gets very hot when anything is connected via the mini jack. It starts in the DAC and then spreads west from there. No problems on 1/4" output and it doesn't happen if the other end of the cable is left floating, only when it's actually connected to another device.
Now, there is a problem with this board: one of the electrolytics, C46, is missing (probably my fault — I have two, and this is the board I am not careful with.) Given its position I can imagine all kinds of stuff going wrong, but I don't quite have the chops to figure out whether it is involved here and what the impact would be.
So, I guess that's my question: would this be causing the DAC to pass a lot of current or something like that? If not, any ideas about what could cause the problem I've described? (I did also solder a header along the GPIO, and I don't see any bridging, but are there any risks there?)
Finally, I don't have any SMD components (nor the patience to solder them) but is there any reason I shouldn't drop a 10µ through-hole electrolytic on there? The leads will be parasitic and I'm not sure I have any low-ESRs around... my instinct is to yolo it but I figured I'd ask since I'm posting.
TIA for any help.