Vintage Synth Explorer Forums

Hello,
Just I bought and ensoniq SQR rack in auction and the module sound receive notes( I can see it on the synth screen),but I can't get any sound from outputs and earphones, only comes a buzz sound.
Anyone with the same experience? What can be the problem?
Thank you very much.

Bear in mind that I don't have an SQR, but no one else has taken a stab yet, so I guess I'll toss this out here and see what happens:

I would check the power supply voltages. There is likely a 5VDC digital line, and that's probably fine considering the CPU boots and works enough to write text to the display, etc. however, (and again, I don't have an SQR, so I could be wrong here) there is probably another set of voltages which power the analog/output section. So I'd check all the PSU output voltages to make sure they're within spec, particularly the +12 & -12 VDC which I'm assuming exists. If either of those are down then it might cause what you're seeing. Could be a whole slew of other things though.