Caesar Chorus

[cable-effect]

I've got an odd issue with this build. What does R102 do in this layout? Smelled something hot and low and behold that resistor is torched. Never had anything like this before. Can post photos if needed.

 

[cable-effect]

Test for continuity across D101 first to see if that's the problem, you could check C104 while you are there. With the new zener you can use the diode tester on your MM to confirm it is a functioning diode but I don't understand zener magic completely. E.g., It won't read 9.1 V. Yes, 1N14739 is a 9V zener.

Okay, a couple things. Uninstalled zener reads 1 on MM when positive terminal is on anode and negative is on cathode and .780 when reversed. Installed zener reads .702 when positive is on anode and negative on cathode but .570 when reversed. Does that seem correct? C104 has continuity with D101.

 

[Bio77]

Diodes should only give you a reading in one orientation. Seem like they are bad. Does the installed diode have continuity through its leads? I.e. does current flow across the part? It shouldn't and that would confirm your problem.

 

[cable-effect]

Diodes should only give you a reading in one orientation. Seem like they are bad. Does the installed diode have continuity through its leads? I.e. does current flow across the part? It shouldn't and that would confirm your problem.

It isn't beeping to indicate continuity, but the voltage I posted were correct. I just swapped out the diode for the one that was reading correctly and the voltages are now similar to the one previously installed. Figured I would try firing up the pedal and no dice.