Pro-10 Blue no sound when on! help please

[kweefthief]

Hey guys! I just finished putting my pro-10 blue together very slowly (build 4!). I plugged in, dry signal works, switch and led works. When on it makes a quiet hum that changes with turning of the pots. There's a tiny hole in the pcb (bottom left on back of pcb) with printed wiring connected to it but it isnt labeled and doesnt show up on the pdf. Could that be the source of the problem?

 

[Robert]

That's a through-hole via, it's just a junction where a trace passes from the top to bottom side of the board.

You can ignore that, it's not a problem.

 

[kweefthief]

Any help is much appreciated! This bummed me out. Shoulda spent my time studying for exam instead...

 

[Robert]

Your opamps are both installed upside down.

 

[kweefthief]

Your opamps are both installed upside down.

LOL i didnt know they were directional. I'll test this out later! Thanks so much!

 

[Robert]

Yep, hopefully they're still good.

If it doesn't work after flipping them around you might need to replace them. Sometimes they survive, sometimes they do not.



Just to clarify, they're installed in the correct locations, they just each need to be rotated 180 degrees.

 

[kweefthief]

Yep, hopefully they're still good.

If it doesn't work after flipping them around you might need to replace them. Sometimes they survive, sometimes they do not.



Just to clarify, they're installed in the correct locations, they just each need to be rotated 180 degrees.

good thing i got extras

 

[music6000]

good thing i got extras

This Identifies the Direction with the Notch & the Dot to Pin 1, has One or the Other or Both!:

 

[kweefthief]

All is well now. I feel joy. Thanks guys!