drgonzo1969
Well-known member
Ive been trying to troubleshoot this El Sol PCB. The LED lights up when the effect is on but no signal. I get signal when the pedal is bypassed. Here are some photos of the pcb. The IC's are LM386N
It looks a bit ragged but it looks correct.Looks like you might have a wiring oopsie from footswitch to board. Doublecheck switch and ground from the footswitch to the board.
Right you are. I zoomed in more.It looks a bit ragged but it looks correct.
Is this your numbering order as your voltages are way off:I gave it a good scrub with brush and rubbing alcohol and reflowed all the solder points. still no signal. i got the multimeter out and this is what i got on the ic's.
Pin 1 - 0.74v pin 8 - 0.46v
pin 2 - 4.22v pin 7 - 0v
pin 3 - 8.94v pin 6 - 0.12v
pin 4 - 8.3v pin 5 - 0v
To me this image looks like center positive wiring. I always wire my negative on the big tab and works perfectly. I think @music6000 point about pin order. Or the power supply used is center positive ?Your wiring to your power jack is reverse. Swap these and test again. This should fix it if all is well.
View attachment 48628
It is wired Correctly.Your pin 4 has 8.3v and it should be 0v as it’s GND. Also you have 0.12v on pin 6 which should be your positive supply.
Your wiring to your power jack is reverse. Swap these and test again. This should fix it if all is well.
View attachment 48628
Hmmmm.Ya that is the order i read the pins. Double checked resistor and cap values. but still cant figure out why im getting those funny readings