Yamaha CS80 group photo

Yahoo Groups archive

Yamaha CS80

Index last updated: 2026-04-09 23:10 UTC

Message

CS-80 almost working again! (no aftertouch and missing a voice)

2009-03-30 by Heath Finnie

Thought I would update the list on my CS-80 work thats been going on. I had help in fixing some of these problems which is great since some of them to me were stumpers.

Here is what has been done:

Power supply rebuilt
Ring Modulator envelope fixed (bad IG00159)
Output hi/low switch rebuilt
constant pitch/loss of pitch controls (bad trace on the BA board)
Funky 3 would not sound (bad transistor on the BA board)

Some things that are left to do and a bit of a mystery:

No aftertouch. (The aftertouch worked when I got the synth but now I have none on any key on either channel which makes me think its something global. The voltages seem to be fine on the TKS board....)

No voice 3 on channel 2, but ONLY in panel mode???? This seems like a weird issue...

And last will be a full calibration.

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.