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Rhodes Chroma Polaris

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RE: [chromapolaris] Re: Polaris stubborn tuning problems

2015-07-10 by Paul D. DeRocco

> From: GMM
> 
> Next plan is to dig into the service manual description of the Timer 
> Interface Serial I/O section, particularly as it relates to 
> the tuning process.

If the working channels end up in tune, then the timer circuitry is
probably fine.

> I'm starting to think that the voices are working correctly, but some 
> are receiving bad information.  We'll see.

The only thing outside the channels that isn't common to the channels are
the various decoded lines that enable the S&H switches and that clock the
data latches. Have you tried replacing the chips that generate those lines
(Z31, Z32, Z60, Z61, Z62)?

-- 

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

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