A digital samling synthesizer. 16 bit up to 44.6Khz. Multi-track sequencer.
Always verify power supply voltages if problem looks like it could remotely be power supply related. Interconnect solder tends to get cracked I see. esr still looks good on capacitors. R5 got cracked from overheating so replaced that with one that has same rating and bigger guage leads anyway. That one goes to ground from something from the transformer I think. I'd love to see a schematic which the service manual doesn't have.
Syntaur has many parts for Ensoniq specifically. Let me know if you need a specific part from my listings in the parts section that you don't find elsewhere or whatever.
Contact Sound Doctorin'