tycobre octavia debugging 1 year later

[edad]

after a year Im back at this project.I got no sound ,but I do have by pass.
This is a ggg pc board with 3pdt 9 volt,dc jack,led.
what  transistors should I have there becuase Im not sure? Ive got 2 np7519 and 1 oc75.Is that correct or should I swap them out.
also my germ diodes are in and the dark line is closest to the out side of the board,away from the transformer.
Also when I use a audio probe should I have the 9 volt in or out.I dont get how this tester is usefull,exactly how do you use this.dont forget I dont know anything.whats the difference on the board between pos and neg ground.
Sorry for all the questions

[aron]

You use the audio probe and start from the input jack, then move your way through the circuit. The Tycobrahe is a very complicated pedal for one of the first builds. You debug with the 9V in, so you can tell if the circuit is working. Before all of this though you should look up those transistors and verify that they are the correct type and see the what to do when it doesn't work sticky thread.