Hi. I have an Orchestrator that’s fully functional except the piano and harpsichord sounds don’t work on 6 or 7 keys. Does someone know which circuit board needs to be replaced, and if that’s a difficult job to perform? Thank you!
Replacement boards are a non starter.
First you need to find out of the problem is mechanical or electrical.
open the synth up and look for burnt capacitors, funny smells.
Then open the unit up and see if this explains your issues.
https://forum.vintagesynth.com/viewtopic.php?t=62712
if not, then look to see if its a problem, with poor contacts with the slider pots.
If not then your looking a failed IC chips, but start with the other areas first.
This fell off my radar for about a year, but now I want to try to fix it! Considering the strings and brass sounds are working on these keys which don’t have piano/harpsichord/bass output I doubt it’s a mechanical issue, right? Which boards will likely need replacing? The board dedicated to each of the keys with this issue?
As per my previous reply, you will never find replacement boards, they do not exist.
You need to find which component(s) have failed, either electrical or mechanical.
You need to take it to a qualified technician.