Hi Don,
Best thing to do measure pin 4 on the CPU at switch on.
The output from the comparator should drop active low for
about a second and then swing back to five volts. I had
a very similar problem a while back which looked like this.
One end was coming off the ceramic resonator! So do check the
REST pulse and draw you conclusions.
Cheers,
Andy
On 18 May 2010, at 14:14, "longenough2002" <
backshall1@bellsouth.net>
wrote:
> I've got a Polysix here that doesn't seem to initialize properly on
> cold mornings. Symptoms range from mild to bizarre. Sometimes I turn
> it on and the lights all come on, then it switches to just A,1,Poly
> like it should, but doesn't seem to have loaded all of patch A1
> parameters properly. Hit the "1" button again and it's fine. Other
> times, none of the lights go off and hardly any knobs respond. If I
> leave it on for a few minutes, then turn it off and back on, it
> fires up properly. The Reset adjustment procedure was done after it
> was warmed up, as per instructions. Could it need tweaking for cold
> starts? How exactly does it work? With that big C21 and a zener, it
> looks like it just delays the initial reset until the 5v supply is
> up to snuff.
> Don B.
>
>
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