Hi Roman, this was great, many thanks.
I have found that the sixth voice had a faulty SSM2056 (EG) chip.
When I moved just the 2056 to another voice, the fauly note appeared
on the new voice, when I moved just the 2044, the faulty voice was
still no.6 (it hadnt been moved at this point and 2056 was still in
voice 6)
There appears to be a number of adjustable pots (I think thats what
they are, and I'm assuming it's one of these that you adjust for
tuning, however, a little unsure as to what you mean by "adjust the
voice to tuning procedure" as I don't know what the correct
procedure is, so I think I'll just change the chip and hopefully
that will solve my problem.
Thanks again for the help... Rob
--- In PolySix@yahoogroups.com, Sowa Roman <roman.sowa@u...> wrote:
Hi,
looks to me like you have problem with one voice.
It requires trimming, and if it doesn't help, the chips in that
voice may be faulty.
I suggest the following:
1. find the faulty voice - there's a LED in each voice, so you know
for sure which of the 6 are faulty when you play it.
2. adjust the voice according to tuning procedure
3. if it doesn't help, replace filter chip (SSM2044) and envelope
generator (SSM2056?) with chips from any other voice. If the problem
occurs with that other voice now, you know you have faulty chips.
4. check also connections between voice and CPU board. Best is to
disconnect and reconnect them several times.
5. if that sounds too techy for you, give the P6 to someone who can
fix it.
Roman