Rhodes Chroma Polaris

One voice of my Polaris is out of tune (voice 1) after perforing AutoTune.

I can also hear a slight portamento on that voice which makes me think the S+H multiplex thing is going on which seems to be a known / common problem.

Can someone point me to info about which caps to check? Should I try reseating the chips as well? Anything else to try?

Thanks!

The capacitors in the S&H circuits are not the kind that fail 
and you should not replace them, IMO.   If there really is an S&H issue,
it's much more likely to be a 4051 analog switch IC.

Bob

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On Sun, 11/13/16, dmxkrew@... [chromapolaris] <chromapolaris@yahoogroups.com> wrote:

 Subject: [chromapolaris] Tuning problem / S+H capactiors?
 To: chromapolaris@yahoogroups.com
 Date: Sunday, November 13, 2016, 11:56 AM
 
 
 
 
 
 
 
 
 
 
         
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 One voice of my Polaris is out of tune (voice 1)
 after perforing AutoTune.I can also hear
 a slight portamento on that voice which makes me think the
 S+H multiplex thing is going on which seems to be a known /
 common problem.Can someone point me to
 info about which caps to check? Should I try reseating the
 chips as well? Anything else to try?
 Thanks!

Each voice has two 4051B's in the S&H circuit, plus two quad op amps.
I am looking at figure 9-13 in the service manual.

I would look into those parts on the bad voice.   Not the polypropylene S&H caps.

Paul D is the expert here.

Bob