Xpantastic!

Voice 1 seems to be bad, so I've turned it off.

With Voice 1 Off, This is the status of Autotune

VCOs- PASS
PW - PASS
RES- PASS
VCF- PASS
VCA- FAIL
(With VCO1 on, all the above tests FAIL.)

On Master Page, Page 2, Voices On.OFF, All Voices show FAIL

DAC Tests
 DAC Mono- Page 2 LED blinks about 2 times per second (Is this good or
bad? Nothing in the service manual about the blink Rate.

I hear a Buzz in the audio- which sounds like a sawtooth going about 5
times per second.

DAC OFFSET- Page 2 LED blinks about 2 times per second. Good or bad?

All other tests on the Service Page are OK

> Out of tune Points to the DAC, pray it's is not failed because it's
> even harder to find than the CEMs.


> Can you tell if the filter still sweeps well? Or - Turn off the VCO
> waves and turn the resonace all the way up,and the cutoff all the way
> down, Mod by keyboard to see if you can play the filter like a voice.

Self resonating? Yes.

> Once we know if it's the DAC or
> not we can go from there.

Also- after hitting untune on the DAC page, then doing auto tune, my
VCOs sound much better. In tune, that is.

So- it only looks like Voice 1 is fialing, and the VCA test.

Now what ?