> Fernando Zarone <mailto:fernandozarone@...>
> February 12, 2011 11:22 AM
>
>
> Hello all.
> After switching the machine on, here is the problem:
> MIX I : everything works fine. I move the "channel" selector down to
> Mix II
> MIX II: panel and memory do work as well. Only the Preset buttons show
> the following fault:
> when I play the first note it does not work (sometimes it seems to
> fire a note, but at a very low level... ), the following 6 in a row do
> work. then the following does not work, and so on. 1 yes 6 no.
> Moreover, when I keep the first (faulty) key down, and play another
> key in a repeated sequential way, all of the notes are normally heard.
> I tried to move and check the boards' cables, no clue. The fact that
> all of the voices work when panel or memory 2-4 are switched on means
> that the voice board of the first note (21)
> is not faulty. Do I have to check at T54 or BA?
Hi Fernando.
It certainly seems like a problem with the first voice card for channel
II (M21). It's weird that it's OK from panel and not presets. Here's a
couple of ideas to narrow it down:
On the panel, turn off VCF level and put Sine level at maximum. Verify
all voices work ok.
Now turn down Sine and turn up VCF. Turn on pulse wave but turn off
sawtooth. Verify all voices.
Finally, turn off pulse and turn on sawtooth and repeat.
Let us know if that shows anything interesting.
David
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