Rhodes Chroma Polaris

> From: ijbandman
> 
> My unit started acting up. 2 to 3 notes dont play on the 
> patches. What real mysterious, different patches give me a 
> whole new set of notes that dont play. eg... patch A1 (notes 
> F# and D wont play) Patch A2 (notes A and C wont play) ?????? 
> Anyone know whats happening. Dude from Synthtronic says it an 
> Osc CEM3374??? Anybody recently have the same problem.

I can't imagine any mechanism that would consistently make the same notes
fail on one patch, while consistently making a different set of notes fail
on another. First of all, the autotune usually removes bad channels, so you
simply get fewer notes of polyphony. If there's a failure that doesn't show
up in autotune, then you usually get a pattern of good/bad notes that
repeats every six notes as you play a scale (or fewer if the autotune
removed a completely bad channel). If this is what's happening, the most
likely problem is that the volume offset calibration is waaay out of whack.
That's something you can fix yourself without opening the unit up. It's
described here:

http://www.rhodeschroma.com/?id=polarisserviceadjustmentscheckout#volumeoffs
et

A more remote possibility is that the analog switch that directs the output
of each channel either to the output bus or the autotune bus has gone bad on
one or more channel. If all channels tune, then they work, at least well
enough to make sound, but it's possible that one of these switches is
permanently routing the output of a channel into the autotune bus, so you
never hear it.

I doubt that there's a problem in a 3374. If that was bad, then the autotune
would almost certainly fail on that channel.

-- 

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...