This problem sounds like a component is overheating and shutting down. A capacitor could be leaking to ground. Have a tech look at the power circuit and then the cpu and the rest of the digital section. Is anything getting warm or hot
Fran

--- In oberheim@yahoogroups.com , Martin Ator <cyllall@...> wrote:
>
> Hi,
> What type of battery is it CR2032
> What is the part number of the original RAM, is it something like this on the
> end ******-15L
> Have you identified the CPU, is it in a socket, is there only one RAM chip, have
> you got a voltmeter
>
> Martin
>
>
>
>
> ________________________________
> From: sokkerkid10101 <sokkerkid10101@...>
> To: oberheim@yahoogroups.com
> Sent: Sat, 22 January, 2011 12:17:01
> Subject: [oberheim] Re: Oberheim Perf/x Drummer problem
>
>
> Thank you for the reply and info about the battery
>
> I put a 32k ram chip in there but the problem still persists. However I believe
> the problem is due to something with the RAM since I get the same messages when
> there is no RAM chip in it; except it takes a few moments to occur when there is
> a chip in it.
>
>
> Any other help would be appreciated, I can make a video if needed. Also
> considering taking it to a pro...
>
> --- In oberheim@yahoogroups.com , "Steve" <steve@> wrote:
> >
> > The battery keeps the data in the RAM alive. Without it, it would revert back
> >to factory
> > settings when you shut off the power. Today we would use Flash memory for
> >this, but battery backed RAM was one of the better options back then.
> >
> > As far as curing what ills your drummer, I can only suggest reseating anything
> >that is socketed, in case oxidation is making a bad connection somewhere.
> >
> > --> Steve
> >
> > --- In oberheim@yahoogroups.com , "sokkerkid10101" <sokkerkid10101@> wrote:
> > >
> > > Hey all, first of all- hi
> > > I was running out of options until I found this wonderful group!
> > >
> > > Secondly,
> > > I just purchased an oberheim drummer off ebay and it started giving me
> >problems immediately. The issue is that, if I let it sit and rest for a bit, it
> >starts up fine and works great, until after about 1-3 minutes when all of the
> >function become inaccessible. AKA it shows "0" for preset, and it is
> >unchangeable, as well as all other functions show "oF" and I cannot change it.
> >This will happen immediately if I just switch it from on to off.
> > >
> > > I have it opened up here (got scared that I had destroyed it on one or two
> >occasions while playing with the ram and eprom). I am trying a new battery but i
> >don't have my soldering iron here at school so it is just sitting between the
> >tabs.
> > >
> > > what does the battery do btw
> > >
> > > And I have a new 32K X 8 ram on its way.
> > >
> > > Any other suggestions
> > >
> > > Thank you!
> > >
> >
>