My Suggestion is just to removes the wires and resolder fresh
ones.....coroded wires is a real bitch to solder, it just won't stick
(join)....

Ryan

--- In tr-707@yahoogroups.com , "imz0rro" <the_arm2@...> wrote:
>
> Thanks for getting back so quick guys and for the great advice.
> I've got a good idea what the problem is now. When i went to put
> batteries in the 707 i noticed the contacts were a little corroded but
> these cleaned off really easily with just some cotton buds and i
> thought they'd be fine.
> However, when i went back to check the contacts tonight after reading
> your replies i noticed that at the edges where you have the little
> holes where you can see up into the machine the contacts are corroded
> up inside there too. Hopefully opening it up and cleaning these will
> solve my problem.
>
> Any tips on doing this and/or whats best to use
>
> Thanks again for all your help,
> Ciaran.
>
> --- In tr-707@yahoogroups.com , "plutoniq9" <Plutonique9@> wrote:
> >
> > Like Gregory said, it could be that the wires going from the batteries
> > to the board are either disconnected/broken, or coroded from a battery
> > leak....it's not always obvious, so the best way to check is with a
> > continuancy meter from the battery terminals to the board.
> >
> > Also, looking at the schematics, the battery power first goes through
> > diode "D9" before reaching the RAM, if that was bad....you wouldn't be
> > getting any power to your RAM. A multimeter with a diode check would
> > be able to test that.
> >
> > Good Luck!
> >
> > Ryan
> >
> > It's normal for all the junk paterns to fill memory when the RAM is
> > not battery backed, 606's, 808's, 303's....they all do it too.
> >
> > --- In tr-707@yahoogroups.com , "gregory zifcak" <foleymachine@> wrote:
> > >
> > > i'm pretty sure it means the batteries aren't working for whatever
> > > reason. if you've put fresh batteries in and it's still
happening, the
> > > battery wires might have come loose or something. i had one that did
> > > this, and while it might be something very simple and obvious if you
> > > open it, i couldn't figure out my problem at all. the wires were
> > > obviously connected, and i couldn't see any problems in the circuit
> > > paths. i just ended up backing everything up onto cassette and then
> > > loading it back in before every show. it was actually quite
reliable,
> > > a lot less picky about levels than an mmt-8 with a similar
problem. i
> > > finally got a memory cartridge, which was a lot faster and less
> > > nervewracking. you could use the cassette jack to back stuff up
into a
> > > computer audio recorder or minidisc too. there may be some type of
> > > sysex, but i've never heard of it. my current machine doesn't have
> > > this problem, but i mainly just improvise with it anyway.
> > >
> > > good luck,
> > > greg
> > >
> > > --- In tr-707@yahoogroups.com , "imz0rro" <the_arm2@> wrote:
> > > >
> > > > Hi all,
> > > > I recently bought a 707 and have had a bit of time lately to
have a
> > > > good play around with it. I've noticed is has problem with the
> > > > internal memory in that it wont keep my patterns for very long
> (i dont
> > > > know how long exactly.. it'll keep them for 10 minutes but
certainly
> > > > not 10 hours). Now, the weird part is.. when i switch the
machine on
> > > > its filled with 'hits' thats is to say that all instruments are
> being
> > > > played at the same time and the grid is 'full'. It clears fine
and i
> > > > can get on with programming it but like i say it wont keep the
> > > > patterns. I found out how to reset the unit and it went back
to the
> > > > default patterns and i thought that would be the end of it but yet
> > > > again after some hours of being turned off, turning it back on the
> > > > grid is 'full' again. I'd have thought if the internal battery was
> > > > done then it'd just keep resetting itself back to the default
rather
> > > > than having this weird tendency to fill up the grid with every
hit
> > > > though maybe the weak battery is corrunpting the memory I've
really
> > > > no idea.. the first dealings i've had with this machine is when i
> > > > bought it.. perhaps this is a common problem when the internal
> battery
> > > > dies
> > > >
> > > > Any help you guys could give me would be much appreciated.
> > > >
> > > > Thanks in advance,
> > > > Ciaran.
> > > >
> > > > P.S. i HAVE put fresh batteries in the back since buying it ;)
> > > >
> > >
> >
>