PCB308 Octave no sound

[masonlewisdiesel]

been going down the octavia rabbit hole lately. put together a Octa-M

ayer rather quickly, having some problems out of the gate.

I denfitly rushed this build so any advice would be appreciated, I decided to table the toubleshooting until today. Starting this post at the same time.

Here is what I KNOW out of the gate:
Bypass works
continuity @ tip input jack to output jack tip (switched)
NO Continuity @ tip to ground
LED always on but brightness reduces 50% when switched.
Now, NO LED(although I think its just toast from me shorting it while starting to test) although Voltage at led pads
*Important note* when i first tried it out I made the mistake of not terminating D100. applied voltage for 20 seconds or so then realized that I spaced out it. Then terminated it. In other words there was voltage to circuit WITHOUT D100 for a breif moment....Amature hour.


I'm still pretty green with effects pedals, that being said is there a flow chart or some advice anyone could give me for troubleshooting?
diagnostic flow chart?
voltage test points?

anything would be amazing! Part of me hopes someone will see a obvious flaw right away, but I would really like to go though the motions so I understand these systems a little better.
Thanks again!
-M Lewis

 

[Stickman393]

First off: your pots are mounted to the wrong side of the board.

The components need to be facing outwards, away from the direction of the pot shafts. Which means that your switch wiring is likely in the reverse order.

 

[masonlewisdiesel]

First off: your pots are mounted to the wrong side of the board.

The components need to be facing outwards, away from the direction of the pot shafts. Which means that your switch wiring is likely in the reverse order.

oh my god. I can't belive I did that. I hope i didn't smoke anything. thanks @Stickman393 !! I'm such a F***-up, haha

 

[Stickman393]

oh my god. I can't belive I did that. I hope i didn't smoke anything. thanks @Stickman393 !! I'm such a F***-up, haha

Easy enough to make that mistake. Just be careful with de-soldering the pots, it's easy to overheat those connections and lift a pad.

You're probably fine. I doubt ya fried anything.

 

[masonlewisdiesel]

Easy enough to make that mistake. Just be careful with de-soldering the pots, it's easy to overheat those connections and lift a pad.

You're probably fine. I doubt ya fried anything.

swapped those pots, new LED. no problem. My neighbor is playing right now so i'm about to walk next door and see if it fires up. As i'm leaving my bench I threw it on a power supply. Same thing with the LED(short video attached). Any guess? in the meantime i'm going to roll the dice and see if it works. I tell ya, a scope and a signal generator is starting to sound nice!

 

[Robert]

The LED isn't switching properly because your PCB is upside down. The connections between the PCB and breakout board are reversed.

 

[Erik S]

Looks like you used one of the LED relocation breakout boards on your stomp switch. Did you put an LED there, and populate the one on the board? I've never used one of those LED switch boards, but I think usually you'd just run an LED in one spot or the other.

 

[masonlewisdiesel]

The LED isn't switching properly because your PCB is upside down. The connections between the PCB and breakout board are reversed.

View attachment 84012

@Robert, wow thats embarrassing. Thank you! works great now