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Subject: RE: [chromapolaris] Re: Just got a Chroma Polaris

From: "tkrotchko" <tkrotchko@...>
Date: 2005-12-14

I don't mind doing that; I'm pretty fair with soldering station; I haven't opened it up yet.
 
The questions I have are:
 
(a) how can I determine if that is the issue
(b) what value/type should I use? (A digikey part # would be great)
 
Also, what kind of circuit board is it?  Its not one of those 7 layer boards.  Does the thing have to come apart completely?
 
(appreciate the help, BTW)


From: chromapolaris@yahoogroups.com [mailto:chromapolaris@yahoogroups.com] On Behalf Of bkuris
Sent: Tuesday, December 13, 2005 4:35 PM
To: chromapolaris@yahoogroups.com
Subject: [chromapolaris] Re: Just got a Chroma Polaris

I have 3 Polaris keyboards, on 2 it has been necesary to replace the
sample-hold capacitors to fix detuned voices.  The process isn't for
the faint of heart (it requires replacing 12 or maybe even 24
capacitors) on the boards parts cost is about $24 but it takes almost 2
hrs to complete the repair.  Another sign of the problem are certain
notes that seem to slide into pitch.

I think I posted more on the issue about a year ago but I would
recommend to skilled solderers only.

-Ben



> After I played with it for about 1/2 an
hour, I pressed the "tune all"
> button.  Afterwards, certain notes
were out of tune with the others.
>
> I pressed the tune one
button, but it doesn't fix it.
>
> Any
ideas?