The first step would to be to find out why it is not oscillating, so
investigate the circuit around that area - and that means the speed pot and
the shape pot. Getting two wires to a pot swapped could well kill it.
Ken
output voltages don't seem to fluctuate at all... (I did not do an audio
check, nor do I have a scope)
present), what would be the methodology to start hunting for bugs ? Which
points should/could I measure first ? What would be good deductive steps to
undertake to pinpoint the problem ?
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
investigate the circuit around that area - and that means the speed pot and
the shape pot. Getting two wires to a pot swapped could well kill it.
Ken
>...more specifically the Utility LFO, to start with.-4V on most and even -8V on some other outputs (the Vari's, I think). The
>
>Wired it up, with Join/Swap switches. +/-12V feed, banana jacks.
>LEDs don't flash, but a quick DVM measuring at the outputs gives me app.
output voltages don't seem to fluctuate at all... (I did not do an audio
check, nor do I have a scope)
>joints, no short circuits at first sight, and that tricky little jumper is
>Apart from the obvious basic legwork (IC's put in correctly, no bad solder
present), what would be the methodology to start hunting for bugs ? Which
points should/could I measure first ? What would be good deductive steps to
undertake to pinpoint the problem ?
>_______________________________________________________________________
>
>tia !
>
>_guy
>
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>