Home Forums GuitarPCB Build Support D’lay: producing unexpected (and bad) noise effect Reply To: D’lay: producing unexpected (and bad) noise effect

#13365
Billy
Moderator

Hello J,

Post some pictures of both sides of the board and offboard wiring so that it can be traced

Pin 1 of the PT2399 should be getting around 5v

Check the op amp voltages which should be around half the power supply 4.5v for inputs and outputs pins 1,2,3,5,6,7 with pin 4 ground and pin 8  +9v all the points on the schematic marked VR should be half power supply

I suspect your problem may lie in the buffer / mixer area IC1A and B pin voltages will tell us for sure

Expected voltages are also noted in the build document

Just in case you don’t know here’s how IC pins are laid out dot or notch indicating pin 1 then down around and up in a U shape same for any number of pins