[sdiy] Fatman question - stuck notes?

[Phil Lockwood]

Thanks for the great suggestions regarding the Fatman.  I've opened it up,
reseated the chips, and also tried a couple different power supplies.  So
far, no improvement.  I'm going to measure the supply pins next, and, if
they're ok, I'll try replacing the optoisolator.  I'll post my findings
afterwards.

Thanks!
Phil



On Wed, 6 Nov 2002, Scott Gravenhorst wrote:

> sasami at hotkey.net.au (Ken Stone) wrote:
> >It sounds like you need to reseat the chips.  Pop it open, and push the
> >chips back into their sockets.
>
> This is a good idea.
>
> I had something like that happen once while I was developing an additional
> VCO for mine.  The load on the power supply was too much and the +5 supply
> would dip too far below 5 volts, crashing the firmware.  Using a separate
> supply fixed it.  You might be wise to check +5 at the power pins of the
> firmware chips to make sure it's all there.
>
>
> >Ken
> >
> >>Hi folks,
> >>
> >>I dusted off my Paia Fatman after moving, and tried to use it in
> >>cubase but every 4 measures or so it gets a stuck note!  It seems to stick
> >>on a pitch that I didn't play - very odd.
> >>
> >>I tried playing a basic sequence (no timecode / sync) and it still
> >>chokes.  Does anyone else experience this?  Any suggestions?
> >>
> >>Btw, this rom release is circa 95.
> >>
> >>Thanks,
> >>Phil
> >>
> >>
> >_______________________________________________________________________
> >Ken Stone   sasami at hotkey.net.au
> >Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> >Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
> >
>
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