[sdiy] serge bi-directional-router wiring help needed...

[Ken Stone]

Official kit instructions (which amusingly fail to mention power! - that is
covered in the general instructions.)
http://www.cgs.synth.net/synth/serge/kit/bi-di_switch.html
Wiring as taken direct from my unit:
http://www.cgs.synth.net/synth/serge/bi_di_router.html

It has internal regulators giving the chip +7 and -7 volts. There is NO
ground connection. -7 volts is used instead of 0 volts.

Ken

>
>Hey guys, I'm halfway through upgrading and re-paneling this serge system
>and I'm stumped on the bi-directional router.  All serge pcb's i've seen
>have ground connected at a pad labeled "W".  This baord doesn't have a W
>pad.  It only has X,Y & Z..  which would be +12, +5 & -12v respectively.
>Even more troubling is there are only 11 other pads besides X,Y & Z and
>the bidirectional router has 12 I/O on the front panel!
>
>The previous owner had Z connected to ground, Y part of the router and X
>at +12v but it didn't seem to work right.  Thought I'd ask on list before
>calling Rex.  I've started reading the lm3900 application notes, but
>there's so many ways to use them and I'm not exactly a wizard with
>schematics.
>
>Anyway, if anyone knows how this pcb expects to be powered that'd be super
>useful...
>
>-anthony
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>