Test #1 - feel if any chip is getting hot. If it is, replace it.
Ken
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
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Ken
>when i wanted to test my bin-n-tic, i incidently switched + and -_______________________________________________________________________
>power supply. after i fixed the problem, I have no sound whatsoever.
>I measured 1.1 volt between pin6 of the ca3140.
>Is there any part(s) that is the most likely to be damaged ?
>thx,
>steven
>
>--- In cgs_synth@yahoogroups.com, "kopernig" <6079smith@...> wrote:
>>
>> yes, i noticed the diode and put in a jumper... but still no joy. i
>> don't have a scope (yet) but the voltage on pin six of the ca3140
>is
>> just under 1 volt. with an audio probe i can (barely) hear a cv
>click.
>> so the vco is not oscillating. i can't figure out why the 2n2
>> capacitor seems to be shorted... there's no resistance between the
>> source and drain of the fet. nothing is physically shorted. a dead
>> fet? any ideas?
>> andrew.
>>
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Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>