> 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@...