Brown Betty

LanePw

New member
I'm having an issue with no sound when the effect is engaged. The indicator led works as should and I've got sound in bypass. Only L3 inside is lighting up dimly. I double checked the LED orientation on the rest and they're correct and worked on my breadboard after removing to check them.
I'm getting almost 6v on one side and 3v on the other of the one that's working and none on the others. All IC's are getting power. Kind of stumped on this.
 
Can you Test these matching Colour circles for Continuity:

View attachment 7848
All of those check out. I flipped L4 around making L3-4 symmetrical and now both light up. L2 pad K on component side has now pulled off when I removed to try the same thing I did on the presence circuit. I've got continuity from C6 to anode on L2. Jumped L2 A to L1 K to make the circuit whole again and still no lights on either L1 or L2 even with the gain pot rolled all three way up or down. IC 2 is sill sending to C6 and C6 to L2, but nothing.
 
I fixed the pad on L2. Everything in the gain circuit is passing signal.
All IC's are operating as they should. I'm at a complete loss on this one. I tested every component before installing even.
I'm totally baffled at this point
 
Can test for Continuity on the Matching colours & supply Voltages for each TL072 :
I'm not a Fan of those Op Amp Sockets!
Use Machined Pin type Only!
View attachment 7865
Curious thing happened when I was checking those pink and yellow circled pads. I had a probe on the pink on the gain pot and checked at C6 which is in-between the branches of that circuit, the LED's would come on. Bad pot maybe?
 
Back
Top