I greatly appreciate you posting the service manual for it. I went straight to the schematics and tested the switches. I started with the vibraphone switch, for a baseline, since it was the only voice working and I needed to determine which terminals were which. OK, so it turned out to be pretty sta...

I bought a PS-3 for the princely sum of $8.56 US. It didn't have a power supply, but I have a 12 volt Dell power supply that is the correct polarity that I'm also using to power a small guitar practice amp. Anyway, when I brought it home, only the keys on the left 1/3 of the board worked (black and ...