Hi TR,
As suggested by CJP you might have a problem with the VCA circuit.
The VCA heart is an SSM2056 chip which is at position IC34 on the
voice board (KLM-366) on the right-hand side with the top panel up.
As an initial check you could try switching the VCA chips from one
voice to another as they are socketed and can be removed without
soldering. There are six in total, one for each voice. If you swap
one and the problem shifts from one voice to another then this might
be the issue. However, if you own an osciloscope (or know someone who
does) I would suggest you check the VCA adjustment in the service
manual (let me know if you can't find a copy). This involves
adjustment of pot VR9 and comparing output waveforms. If you find you
need to replace IC34 I have seen them for sale on eBay or you could
try my old friend Senso at vintageplanet.nl
Also, the SSM series chips are CMOS based and sensitive to static
electricity. Make sure you take the precautions to earth yourself
before handling the internals. Drop us a line if you need any more
help...
Cheers,
Andy
--- In PolySix@yahoogroups.com, "toerag_man" <toerag_man@...> wrote:
>
> Hi,
>
> Every sixth note I play is louder than the rest. Is this a common
> problem? Easy to fix?
>
> Thanks,
> TR
>