for positive trigger outputs, you need to convert the internal
s-triggers to v-triggers. there is a schematic in the files section:
http://f6.grp.yahoofs.com/v1/IPxxRAZe6HzEMH85z7hrHfGTlVm_-3u_S6oayQwfF0NILIoDP36Kg1r-8trpIV2cro-E_nXvVk_c4xfHY8qd9TF1qiugT_qwPeBp/s-trig%20to%20v-trig.txt
you don't need to use a battery though; i just connected the + points
to 5v inside the 707. they're not perfect triggers for some reason.
the sh101 doesn't like them. but the drum circuits i've used are never
picky. you could also try using the internal s-triggers to fire a 555
in monostable mode, and adjust the timing of that pulse for an optimum
trigger.

--- In tr-707@yahoogroups.com , "creekree2000" <creekree@...> wrote:
>
> i hereby announce that there is another working 707 on this planet.
>
> i successfully repaired the defective one i recently got off ebay.
> repairs included cleaning the PCBs from some gooey residue (beer,
> cola, whatever), replacing IC1 (7805) and R49 (strange resistor...),
> replacing 2 volume sliders, replacing a couple of capacitors that
> looked quite suspect to me, and general cleaning of the unit.
> the LCD gave me some headache, it wouldnt want to turn on. only after
> fully disassembling and cleaning of both the LCDs PCB and the rubber
> bars which make contact with the display itself the thing would work
> again.
> i noticed that (for some reason only the roland corp. will understand)
> the legend for the connecion cable for the LCD is reversed: pin 1
> connects to pin 13 on the voiceboard we īll never find out who was
> the genius behind that.
>
> so, i īll move on to the fun part now: modding the beast. there are
> some instructions and ideas on the web, and i already tried shorting
> some pins on IC34 - great noises in there!
> i dont think that i will harm the machine by drilling lots of awfull
> holes in the case - a nice and clean extra box to put the mods in is
> more appealing to me.
>
> did someone succeed in isolating the trigger pulses for the individual
> instruments yet right now it is just an idea, but it should be
> possible to build analogue sound circuitry a la 808 (see
> http://xlargex.xl.funpic.de/ for an excellent 808 clone) and use the
> 707 with them.
> i shall investigate.... one of the next days. right now i am about to
> play a little with my new friend... time to get out the stompboxes! i
> love individual outs....
>
> bleep, creekree
>