Hello, I am searching for some help around here, I bought a non working Twin Famicom (non turbo version), fixed a rather trivial fault (bad connection between the main PCB and FDS drive) and it's working again, but the guy who sold it to me was using it for some experiments so, as I found out, some of the capacitors were already exchanged, the 2C33 is socketed and there may be something else exchanged, that I cannot tell...
The problem is that the Disk system part sounds like it's missing one of the audio channels - listen to this Zelda tune recorded from it:
I tried to exchange the capacitors that seemed leaking, but I forgot where to put them back so I asked Drakon for help and I got this image for the right type of capacitors: https://i.imgur.com/ncXTdZk.jpg
Anyway exchanging caps for new and correct ones haven't repaired the missing channel problem.
Any idea what might be causing this? Thanks for any help!
Some detailed pictures of my board (big size):