They have them here http://www.futurlec.com/ICADC.shtml ________________________________ From: Eric Frampton <eric@...> To: chromapolaris@yahoogroups.com Cc: sukhoy27@... Sent: Monday, February 25, 2013 10:50 AM Subject: Re: [chromapolaris] Osc 2 mod issues on just one voice 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 >> >
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Re: [chromapolaris] Osc 2 mod issues on just one voice
2013-02-25 by K S3