The plot thickens! I've pulled the cover completely off and I've got two more wires on the back of the voicing board. One runs from pin 9 of IC11 to pin 9 of IC28, and the other runs from pin 10 of IC11 to pin 9 of IC31.

I realize I'm going to have to have a good hard look at the schematic here rather than get everyone else to do my homework for me, but as these things are a little over my head, if someone knows off the top of their head what this mod might be for, and whether it might be the one that's f***ing up the hand clap / tambourine signal, I'd appreciate the benefit of your background knowledge.

I'm tempted to just give those two wires a snip as my (de)soldering skills suck...

thanks!
ryan

--- In tr-707@yahoogroups.com , "monks_r_us_771" <monkey_rye@...> wrote:
>
>
>
> Hey, belated thanks Sebastien et. al.!
>
> Here's a sample of what the noise on the main outs and headphone outs sounds like:
>
> http://ryanmead.net/samples/tr707mainOutsNoise.mp3
>
> As you can hear, it's sort of a general crackly cloudiness. I reckon it's more than just a dusty or faulty slider, as it wasn't dispelled or diminished in the slightest by a squirt of contact cleaner, and the noise gets smoothly louder and quieter as I adjust the main volume slider. Nevertheless, I guess you've given me a hint about where to look.
>
> In this clip you'll also hear that the Hand Clap & Tambourine are excessively loud. Also, their slider doesn't seem to do anything.
>
> Here's where the mod wires run to:
>
> http://i250.photobucket.com/albums/gg241/monkslut/707mod-3.jpg
> http://i250.photobucket.com/albums/gg241/monkslut/707mod-2.jpg
> http://i250.photobucket.com/albums/gg241/monkslut/707mod-1.jpg
>
> As you can see they run to various places labeled D3XX on the switch board. Anybody know which mod this might be
>
> Again, thanks to all those who replied to my first post.
> ryan
>
>
> --- In tr-707@yahoogroups.com , Sebastian Schünemann <plusworx@> wrote:
> >
> > hi ryan,...
> >
> > answers inline:
> >
> >
> > >
> > > 1/ There's this weird crackly noise that comes out of both the
> > > headphone jack and the main L+R outputs. However, the individual
> > > instrument outputs are fine.
> > >
> >
> > check the volume poti,.....
> >
> > >
> > > 2/ At some point in this beast's history, someone has tried to mod it.
> > > There's this 15-pin jack coming out the back. Anybody have any idea
> > > what this mod might be Can I take advantage of it Might it be
> > > related to the problem of noisy main outs If I wanted to undo it,
> > > would that be onerous
> > >
> >
> > There are several different mods for this little beast,....you have to
> > open it and try to figure out wich mods were done,... the cable coming
> > out of your machine is for use with a diy brakeoutbox,..... use a copy
> > of the service manual
> >
> > keep us informed,
> >
> > greets
> >
> > sebastian
> >
> > www.tecpuls.com
> > >
> > >
> > > Here are a couple of pics of the jack:
> > >
> > > http://i250.photobucket.com/albums/gg241/monkslut/707-1.jpg
> > > http://i250.photobucket.com/albums/gg241/monkslut/707-2.jpg
> > >
> > > Thanks in advance for any light you might be able to shed on this!
> > > ryan
> > >
> > >
> >
>