I have a broken Quartet that is finally getting some attention.
At first, all the lights worked, but no audio was getting out. We replaced the CD4069 IC, and now we have quiet organ, slightly louder piano, and VERY quiet brass. The attack and sustain sliders also work. So progress is being made.
Here are the remaining issues.
Honky Tonk doesn't work.
Celeste doesn't work.
Strings don't work.
Vibrato doesn't work.
Brilliance doesn't work.
My tech has a (pretty sketchy) pdf of the service manual, but it doesn't seem to match this particular Quartet. So we are kind of stumped.
Are there different versions of the Quartet?
Do any of these problems sound familiar to anyone here?
Are there better manuals available online?