Sorry to interrupt into this great thread... I am really enjoying reading along following all of what is being looked at on the schematic.
I have a question that even the OP might have wondered as well... Can we take voltage tests off of pins 4 and 8 on all the op amp chips? I mean sure we can test voltage there to check but why would that not prove to be useful numbers?
I am following the idea of IC2 being lifted first and then checking IC7. I think something is telling us that +/-24V rails could have something tied into the problem too. Maybe looking at Q2 and Q3 closer(later on down the line of course) and D8 is in there too. IC7 is giving me that gut feeling even more now. Also, have we confirmed what is measured on the 24v rails? Excuse me if I missed something there, but just had to ask. Good luck on this amp and I bet you nail it soon!
I have a question that even the OP might have wondered as well... Can we take voltage tests off of pins 4 and 8 on all the op amp chips? I mean sure we can test voltage there to check but why would that not prove to be useful numbers?
I am following the idea of IC2 being lifted first and then checking IC7. I think something is telling us that +/-24V rails could have something tied into the problem too. Maybe looking at Q2 and Q3 closer(later on down the line of course) and D8 is in there too. IC7 is giving me that gut feeling even more now. Also, have we confirmed what is measured on the 24v rails? Excuse me if I missed something there, but just had to ask. Good luck on this amp and I bet you nail it soon!