I'm refurbushing a 1980 II Europlus. Re-capped PSU working fine now, Applesoft coming up. I've spent a long time cleaning the keyboard, using contact cleaner and lots of key presses. I now seem to have a fully functional keyboard... But - CTRL-C, or CTRL-anycharacter doesn't work. CTRL-RESET works fine, so it's not mechanical.
I've traced through the circuit, and the CTRL key feeds into a NAND gate, whose output feeds the AY-5-3600-931-B6 encoder.
So, I'm pretty much convinced the encoder is faulty. Two questions for you, my esteemed technical friends;
1. Has anyone got any other ideas?
2. Does anyone have a AY-5-3600-931-B6 for sale? Or know where I can get one? I'd like to keep machine as original as possible.