Discussion about the Korg PolySix synthesizer

Hi Aniello,

I¹d doubt very much if it is the 366 at fault. The data and PIO bus have
transitioning logic states on them so it is not really a good idea doing a
DC check on them as the result are meaningless. You¹d be better off using a
scope or even a logic probe (one with with CMOS and a pulse train setting).
However, having 0v on the whole PIO bus doesn¹t sound good. I can only give
you general advise here as you haven¹t got all the test gear, but if you
have had a battery leak and still have the original blue 40 pin CPU holder
installed it might be worth checking for damage underneath it. I have seen
some very bizarre problems before in the past and have had to resort
removing, cleaning up and then replacing it with a new socket. The
programmable IO bus  (P lines) are connected directly to the CPU! If you are
really at the end of your patience with the board and can¹t get any further,
drop me a private message as I may be able to help you.

Cheers,
Andy


On 18/09/2010 19:34, "aniello iaccarino" <ani.bliss@gmail.com> wrote:

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> Ok the problem should not be on the KLM 371
> I checked all "Pxx" and "Dxx" and all works good.
> 
> So the problem should be in the KLM 366?
> 



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