Goodnight.
First of all excuse my bad English.
Im from Venezuela, and I only dominate Italian and Spanish.

I have a Big muff PI deluxe Vintage pedal (the big one)

while using my pedal the glorious sound changed by a great hellish noise.

(I have a small and basic knowledge of electronics and pedals)

*While the pedal is off the guitar sounds normal
*The Three Pots modify the noise.(sustain,fuzz volume,tone)
*the led light works normal
*the capacitors are in good condition
*the resistances seem to be in good condition
*The integrated 4558 TL072 I have no idea if they are working

https://youtu.be/0ghRAcZbV74 enter here to hear the noise
Video problem!

I live in a dictatorship, and the best electronics professionals have left the country.
Does anyone have the schematic – diagram of this pedal?
on its internal plate says EH-1330A

Please Help
I want my pedal back
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