Vintage Synth Repair

Thanks Hugh,

OK I've uploaded a JPeg of the relevant part of the circuit.
I've called it S900_DAC... it's in our photo's section here.

So I am getting around 3volts on pins 14 & 19 of the BA9221 (IC107)
on faulty voice channels.

On good voices there is just millivolts on those pins.

Would you suspect the BA9221....?

Cheers,
TOM




--- In vintagesynthrepair@yahoogroups.com, Hugh Vartanian <bouncev@...> wrote:
>
> What pins have the abnormal voltage readings on the 'good' and 'bad' DACs?
>  Schematic of that area?
> 
> Hopefully this will lead us to figuring out if it is the DACs or some other
> part of the circuit.
> 
> OK, Hugh
>