everything ok - worked great - just like yesterday!!!
i have tried all outputs - they work, so it must be the factory
eproms failing slowly but surely. if there isn´t a risk of damaging
the sp12 i would rather wait until the eproms eventually die out
completely, before we start replacing them.
if you haven´t got anything to add, we can close the topic!!!
AND START A NEW ONE!!!!
--- In emulatorII-list@yahoogroups.com, "Simon Wotton"
<simonabsent@g...> wrote:
> hey rob!!!
>
> here is what the former owner of the sp12 had to say to the
problem.
> meanwhile it has worked again: yesterday everything was fine and
so
> i gave it a "one-day-test-run" - had it on all day, it got quite
warm (like
> all my other emus :-) but did the job. lets see what happens when
i
> power on again today...
>
> here the email from the former user:
>
> Simon:
>
> I'm sorry to hear this is happening. When I bought the SP-12 in
> 1998, it had a dead internal backup memory battery, and as a
result would
> not hold user samples in memory for more than a minute or so after
power
> off. I also experienced the strange distortion noises at that
time if I
> powered off and on again after a few minutes, but the distortion
went away
> after clearing all memory once powered on. This lead me to
believe the
> distortion was due to the dead internal battery, since the ROM
sounds are
> loaded into RAM, similar to the user samples, but are not
automatically
> reloaded into RAM on each power up to avoid overwriting a user
sample that
> might have been previously placed in one of the factory sound bank
> locations. So I concluded the distortion was due to corruption of
the RAM
> data after power off and capacitors discharging, etc. due to no
backup
> memory power from the dead battery. What is confusing to me about
the
> problem you are experiencing is that after I recently replaced the
> internal battery I didn't experience the distortion problem
anymore after
> powering off and on again later, and the user samples held their
memory as
> well. Before I packed the SP-12 to ship it I powered it up to do
a final
> check of everything (including obscure features like the cassette
save and
> SMPTE functions), and to do a final recording of the SP-12 sounds
using a
> high quality sound card I got a few months ago, to make a mini
sample
> library for myself, and I didn't experience any problems.
>
> Since you mentioned you tried clearing all memory and that didn't
work,
> one idea I can think of at the moment is perhaps to wait 5-10
minutes
> after the SP-12 is powered on, then clear all memory and try the
sounds.
> Perhaps a warm up time may be useful, but this is a guess, but let
me know
> the result. Also, if you have a voltmeter and feel comfortable
opening up
> the SP-12, with the power off and power cord disconnected you can
measure
> the voltage of the internal battery (yellow cylinder type). It
should be
> above 2.5 V or so. Be sure to ground yourself or simply touch the
metal
> frame before probing with the voltmeter to avoid static discharge.
>
> Nate
>
>
>
>
> ----- Original Message -----
> From: Rob Keeble
> To: emulatorII-list@yahoogroups.com
> Sent: Tuesday, April 29, 2003 11:11 PM
> Subject: RE: [emulatorII-list] Re: SP12 fails!!! - - - why
always me :-(
>
>
> Hi,
> First check to see if the problem is on one particular channel
(listen to
> the individual outs with ROM and RAM sounds). If ROM and RAM
sounds always
> cause problems on a channel then its a sample replay problem in
the analog
> circuit for that channel.
>
> If all the RAM sounds are always okay and some of the ROM sounds
are
> distorted/high pitched, particularly if mid way through - then
suspect the
> factory EPROM's. EPROM chips do eventually die (yes including
the EII and
> SP-12 boot EPROM's....). You can easily get a new set of EPROM's
burnt by a
> service centre - I have the binaries. Some E1 users have already
encountered
> boot ROM death, and EII users will see this happening over the
next 5 - 10
> years. Lucky we have all the EPROM binaries available to
recreate them!
>
> A service centre would also swap the sample EPROM's about to see
if the
> problem is the chip or the replay electronics. Please don't
attempt repairs
> without thr right equipment/training and the power OFF.
>
> Rather Off Topic...if any one is interested in the factory SP-12
samples in
> LM-4 format....let me know!
>
> Regards
> Rob
> www.emulatorarchive.com
>
> i have tried it again today...
>
> looks like these noisy sounds have now become a permanent error
on
> my sp12. when i switched it on again today, there were the same
> things going wrong as yesterday. i can say more about the problem
> now, because i have tested a few things:
>
> - tried to put user sounds on the "failing" drum-buttons, that
works
> fine. i also have a list of all the factory-drums making the
> described problems.
>
> snare1 (completely)
> snare2 (completely)
> ride1 (completely)
> ride2 (completely)
> crash (just a slight bit of the end)
>
> i have recorded the failure and will send you an email, with an
mp3
> attached. you can answer me via email if you want - or in the
forum,
> depending on your oppinion wether this could be of any interest
for
> other users...
>
> thanx in advance and please don´t destroy all my hopes of me,
> eventually haveing all my emu´s working 100% - ok :-(
>
> simon
>
>
>
> [Non-text portions of this message have been removed]