--- In
PolySix@yahoogroups.com, "hjulskov" <hjulskov@...> wrote:
>
> --- In PolySix@yahoogroups.com, "nanomole39" <nanomole39@> wrote:
> > Hi,
> >
> > just a thought,in the group there are lots of posts askin how to
set up
> > and tune the P6,perhaps one of our more expert members could post
> > a "newbies guide" ?.just a thought and it would help alot of
> > members,myself included.
>
> I agree, I tried Johannes Hausensteiners guide:
> http://launch.groups.yahoo.com/group/PolySix/message/1604
>
> But my P6 still sounds terrible (and I replaced the octo-coupler).
Sorry, no newbies guide, but it sounds like your problem isn't tuning
but some sort of malfunction.
If you lift pin 12 (VCO) of CN05 (the link between the patch storage
and voice/key assign boards) by unclipping that pin from the socket
shell you may or may not still have the problem. This line carries a
sum of all the signals that are intended to vary the pitch of all the
oscillators.
If you still have modulation with the pin lifted, the problem is most
likely on the KLM-366B, which still holds secrets for me, so I'll pass
no further comments on how to fault find or fix it.
If the modulation goes away, your most likely culprit is the KLM-367
or just maybe the control panel. To find of the signal is coming from
the control panel you can look at pin 2 of CN06 which is marked VIB
with a 'scope or lift this pin.
If there is battery leakage on the KLM-367, you might want to look
very closely at the VIB pin on CN06, as it's right next to the LFO pin
and any leakage would modulate the oscillators with the LFO. That
battery leakage goo is amazingly conductive and likes to live actually
inside the PCB material, it seems. Cutting tracks and using
point-to-point wiring or replacement tracks made of glued down
insulated wire seems to be the only way to work around it but there
may be some way of cleaning/grinding(!) it off.
--
phil