I see, thanks Ken
I found the diode just after the +15V was dead, so that's why I had a continuity and the same voltage on the C pad
btw, my PSU delivers +15,48V on the positive rail and -15,54V on the negative. As the +14,4V only relies on the diode resistance apparently, I have +15,19 instead of +14,4 (and -0.74V instead of -0.6V). Would that be a problem for the circuit or the chips ?
Another question I had about the WRS: I don't find anything in the docs or the schematic aboutt how should I wire the pots for the inputs. Are they supposed to be simple attenuators, or sending fixed voltages in parallel with the inputs (as there a 8 of those) ?
Thanks
Philippe