Rhodes Chroma Polaris

I just got my polaris back from a repair shop that did some surgery to
replace the assignable slider and swap a front panel that had switch
problems. ( parts from another polaris) note It appears that the
circuits now work and the controls work but there now is this odd
DETUNE? problem. As you play through an octave the notes sound sour
and progressively more off till there is a ppoint when one sounds
markedly flat then seems to return to being more tonal by the next
octave, this occurs on almost all presets, some very bad others less
so. ( possibly noticeable in all sounds to some degree) I tried
the 'tune all' voice reset button , no improvement, and also the
detune slider seems to have some effect but when centered this effect
is still present, moving the detune slider modifies it but it sounds
wrong regardless of setting. Couild the ossillators be out of sync?
Is there a way to adjust them? the unit plays but as a friend
says.. "it sounds like you are playing a sour blues scale when you
play c major." so far the repair shop is reluctant to repond to my
complaints and I wonder if anyone has a clue as to what may have
happenned.

I just got my polaris back from a repair shop that did some surgery to
replace the assignable slider and swap a front panel that had switch
problems. ( parts from another polaris) note It appears that the
circuits now work and the controls work but there now is this odd
DETUNE? problem. As you play through an octave the notes sound sour
and progressively more off till there is a ppoint when one sounds
markedly flat then seems to return to being more tonal by the next
octave, this occurs on almost all presets, some very bad others less
so. ( possibly noticeable in all sounds to some degree) I tried
the 'tune all' voice reset button , no improvement, and also the
detune slider seems to have some effect but when centered this effect
is still present, moving the detune slider modifies it but it sounds
wrong regardless of setting. Couild the ossillators be out of sync?
Is there a way to adjust them? the unit plays but as a friend
says.. "it sounds like you are playing a sour blues scale when you
play c major." so far the repair shop is reluctant to repond to my
complaints and I wonder if anyone has a clue as to what may have
happenned.

> From: spistrich
>
> I just got my polaris back from a repair shop that did some surgery to
> replace the assignable slider and swap a front panel that had switch
> problems. ( parts from another polaris) note It appears that the
> circuits now work and the controls work but there now is this odd
> DETUNE? problem. As you play through an octave the notes sound sour
> and progressively more off till there is a ppoint when one sounds
> markedly flat then seems to return to being more tonal by the next
> octave, this occurs on almost all presets, some very bad others less
> so. ( possibly noticeable in all sounds to some degree) I tried
> the 'tune all' voice reset button , no improvement, and also the
> detune slider seems to have some effect but when centered this effect
> is still present, moving the detune slider modifies it but it sounds
> wrong regardless of setting. Couild the ossillators be out of sync?
> Is there a way to adjust them? the unit plays but as a friend
> says.. "it sounds like you are playing a sour blues scale when you
> play c major." so far the repair shop is reluctant to repond to my
> complaints and I wonder if anyone has a clue as to what may have
> happenned.

There's no alternative but to poke around with a scope. It sounds like the
usual bad capacitors in the sample-and-hold circuits, but step one is always
to make sure the power supply is stable.

--

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