Il giorno 12/feb/2011, alle ore 22.05, David Rogoff ha scritto:
> > 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.
>
Not only are all of the voices in the "panel" position working, but also in both the "memory 2 and 4" positions! Just in the fixed PRESET ones MIX II...
I have tested the way you indicated to me: all of the voices work, in PANEL position, both only sine (no VCF) and pulse and sawtooth.
I have also checked the wire connections between BA and T54 , and between T54 and M21. All are ok.
Mistery.
Fernando
> 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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>
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