>
> At 11:09 PM 2/18/2011, you wrote:
> >Another question
> >
> >When my oberheim drummer triggers my drum
> >machine, it is quieter than when I press the
> >pads myself. Is this normal? I suppose it could
> >be a voltage problem or my midi components wearing down.
>
> It's not a matter of voltage level or worn out parts.
> The Drummer is probably sending notes with some
> default velocity value less than maximum. Your
> drum machine responds to the lower velocity value
> by playing notes more softly. I don't know if
> the Drummer has a setting for the velocity, but
> if you are able to crank it up, you should be
> able to get your drum machine to play louder.
>
>
> >--- In
> ><mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com,
> >"sokkerkid10101" <sokkerkid10101@> wrote:
> > >
> > > Oh god I hope not...those were the crappiest
> > solder joints; I am surprised it even turned on. But it did!
> > >
> > > --- In
> > <mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com,
> > Martin Ator <cyllall@> wrote:
> > > >
> > > > Well done. You will be building your own synthesisers next.
> > > >
> > > >
> > > >
> > > >
> > > > ________________________________
> > > > From: sokkerkid10101 <sokkerkid10101@>
> > > > To: <mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com
> > > > Sent: Tue, 15 February, 2011 7:29:06
> > > > Subject: [oberheim] Re: Oberheim Perf/x Drummer problem
> > > >
> > > >
> > > > Fixed! Replaced voltage regulator
> > > > thanks
> > > >
> > > > --- In
> > <mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com,
> > "sokkerkid10101" <sokkerkid10101@> wrote:
> > > > >
> > > > > Anyone happen to know the
> > voltage/amps/current of the perf/x unit's power
> > > > >adapter?
> > > > >
> > > > > thanks
> > > > >
> > > > >
> > > > > --- In
> > <mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com,
> > Martin Ator <cyllall@> wrote:
> > > > > >
> > > > > > There's some test points on the PCB
> > near the Intel CPU. +5 and GND. You can
> > > > > > check the function of the regulator
> > here and monitor any changes in voltage.
> > > > > > The PC900 could cause midi problems.
> > According to the datasheet the LED
> > > > >that's
> > > > >
> > > > > > inside the PC900 decreases in
> > luminosity by 50% after 5 years of use. You
> > > > >could
> > > > >
> > > > > > possibly test the Midi by using Midi
> > thru socket instead of the Midi in(if it
> > > > >
> > > > > > has a midi thru socket) Try a sysex
> > dump out and send it back in with the
> > > > >midi
> > > > >
> > > > > > in port to test that if it doesn't work
> > properly try the thru. I don't know
> > > > >if
> > > > >
> > > > > > the cyclone has a verify sysex
> > function. You should use that and not load
> > > > > > directly into memory if poss. You could
> > maybe change the Midi in 220 ohm
> > > > > > resistor (R4?)to 150 or 120 ohm.
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > ________________________________
> > > > > > From: sokkerkid10101 <sokkerkid10101@>
> > > > > > To: <mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com
> > > > > > Sent: Sat, 29 January, 2011 9:42:30
> > > > > > Subject: [oberheim] Re: Oberheim Perf/x Drummer problem
> > > > > >
> > > > > >
> > > > > > Read through some other google links
> > > > > > do you think it could possibly be the photocoupler (pc900)
> > > > > > I will also start testing the regulator, since that
> > > > > > is what some have claimed to cause them problems. It's not
> > > > > > the power supply and all solder points and resistors look good...
> > > > > >
> > > > > > --- In
> > <mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com,
> > "cyllall" <cyllall@> wrote:
> > > > > > >
> > > > > > > I'm looking at some pictures of a
> > Cyclone I found online as I don't have
> > > > >any
> > > > >
> > > > > > >Perf/x stuff.
> > > > > > >
> > > > > > > Check that all the legs in any
> > socketed chips are actually in the socket.
> > > > >It is
> > > > >
> > > > > > >possible when putting a chip in, to
> > bend the legs back on themselves in a
> > > > >"U"
> > > > >
> > > > > > >shape and it looks like they are in and they're not.
> > > > > > > There may be something wrong with
> > your display showing 3 instead of 8.
> > > > > > > You can check for cracked solder or a short circuit by the
> > > > >display/resistors
> > > > >
> > > > > > >and underneath.
> > > > > > > This could be a power supply problem.
> > > > > > > You need to check the +5v and GND test points on the board.
> > > > > > > If you clip a crocodile clip to the
> > regulator(as a heatsink) and it then
> > > > >takes
> > > > >
> > > > > > >longer to go funny then it could be the regulator.
> > > > > > > Make sure your power adapter is the
> > correct voltage and unless it's the
> > > > >same
> > > > >
> > > > > > >mah rating as the original(or is the original) it should be a
> > > > >regulated/switched
> > > > >
> > > > > > >mode supply, so as not force too much current in.
> > > > > > > I would take the battery out for now
> > as it could hold corrupted data in the
> > > > >
> > > > > > >RAM.
> > > > > > > Wait a few minutes and do a hard reset.
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --- In
> > <mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com,
> > "sokkerkid10101" <sokkerkid10101@> wrote:
> > > > > > > >
> > > > > > > > narfman96:
> > > > > > > > No nothing seems to be getting too
> > hot but that seems like a very logical
> > > > >
> > > > > > >possibility and would explain why
> > there is a delay for it reverting to a
> > > > >state
> > > > >
> > > > > > >of 0 ram, maybe the bad component is dealing with the ram
> > > > > > > >
> > > > > > > > Martin:
> > > > > > > > The original battery was a DL2032,
> > I tore that out and have in it now a
> > > > > > >CR2032. The original ram (8k one)is#
> > made by hyuandai, I replaced it with a
> > > > >32k
> > > > >
> > > > > > >of HM62256LP-10.
> > > > > > > >
> > > > > > > > One thing to note is that when the
> > version displays on startup, it says
> > > > >3.3,
> > > > >
> > > > > > >although the manual says it should be at least 3.8
> > > > > > > >
> > > > > > > > Yes the CPU (and the ROM for that
> > matter) both appear to be in correctly
> > > > > > > >
> > > > > > > > Yes there is only one ram chip
> > > > > > > >
> > > > > > > > And yes I have access to a
> > voltmeter (and one of those displays that show
> > > > >
> > > > > > >current and stuff-i know I sound like
> > an idiot, I can't remember the name of
> > > > >
> > > > > > >them right now) I am not keen on circuitry however
> > > > > > > >
> > > > > > > >
> > > > > > > > Thank you
> > > > > > > >
> > > > > > > > --- In
> > <mailto:oberheim%40yahoogroups.com>oberheim@yahoogroups.com,
> > "narfman96" <narfman96@> wrote:
> > > > > > > > >
> > > > > > > > > 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
> > <mailto:oberheim%40yahoogroups.com>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:
> > <mailto:oberheim%40yahoogroups.com>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
> > <mailto:oberheim%40yahoogroups.com>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
> > <mailto:oberheim%40yahoogroups.com>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!
> > > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> >
>
