--- In chromapolaris@yahoogroups.com, Eric Frampton <eric@...> wrote:

>
> Yep, I've done the whole service routine, and it all calibrated up just fine.
>
> Unfortunately, I don't have any spare ADC0804's to toss in there. Where would I find one now?
>
> e
>
> On Feb 25, 2013, at 7:41 AM, sukhoy27@... wrote:
> > Hi , did you try to follow the test as indicated in the Service Manual , just like
> > Lower Function D , 4 and look if led over Master Volume slider
> > Turn on ?
> > I had many strange problem on my Polaris , like slider malfunction and test many IC's with scope and signal tracer, but simply replacing the ADC0804 all problems gone away !!!
> > Ciao
> > Mario
> >
> >
> > --- In chromapolaris@yahoogroups.com, Eric Frampton wrote:
> > >
> > > Hi folks -
> > >
> > > So I'm finally making some progress getting this Polaris back up and on its feet. This one last issue has me stumped, tho'.
> > >
> > > On one voice only (#2 of the 6), the mod routings accessed via the Assignable Control (Osc 2 Vibrato, Osc 2 Env, Detune) aren't working right. Pulling the control positive for Osc 2 Env creates this strange band-modulated sort of thing as the oscillator sweeps down, then pulling the slider negative, instead of creating a rising pitch like the other oscillators, starts with silence and fades in. Detune doesn't do anything at all, and Vibrato creates some sort of waveform that's different from the other 5 oscillators and just plain wrong. By itself - unmodulated - the oscillator runs and tracks just fine.
> > >
> > > Again, this behavior is only on one voice - the other 5 are fine.
> > >
> > > The oscillator seems to pass the Autotune routine - at least, the Tune light blinks 6 times.
> > >
> > > Using a shotgun approach, I've tried individually swapping out the two 4051's on that voice, the LF347 for Pitch B, and the 3374 itself. No change for any of it.
> > >
> > > Any thoughts?
> > >
> > > Thanks,
> > > Eric
> > >
> >
>

Hi Paul , I agree with You .
I do not know Eric did all service check !
I think that swapping out the two 4051's is a great idea.

Ciao

Mario