DS-1 Clone not working after attempting to Mod it

[Linac Guy]

Hey Guys,

Sorry but I could use some help with this pedal again. I took a working pedal and wanted to mod it (BAD idea).

Here is the link to the project and documentation
https://aionelectronics.com/project/comet-boss-ds1-distortion/

https://dl.dropboxusercontent.com/content_link/NtXjqybxYpPvVJj19BXvtUm79T2djUYsfqR8JlWxcZUhZ4FIscg0tsfkEVLjWzFP/file?dl=1

Pg.3 Big Muff Mod @ the bottom of pg.3 of the documentation.
It was only 3 components (100n cap, 2-1n914). I only had to de-solder the power wire to the DC plug to get the board out to work on it.

After the "mod" I put it together and all I got was just a hum/fuzz/noise sound out of the amp when switch pressed. In by pass it works great.
In my wisdom I figured if I undo the mod I can go back to a working pedal. So I removed the 3 components and it is the same as it was with the mod. Real bummer!

I checked all grounds and they are good.
IC voltages are same as when working
1-3 = 3.12v
4 = 0v
5-7 = 3.12v
8 = 9.4v

Not sure what I did but I definitely messed it up somewhere. 
The board looks the same as it did with the last picture I put on Imjur but if you would like a new one I would be happy to upload one and post the link.

Thanks
Bobby

[garcho]

the drop box link is 403'd.
go ahead and take another pic. it might look the same to you, but then again, you're the one who isn't sure what's wrong, so it might not be obvious, and considering you don't have to pay for it to be developed and then wait a week to get it back...
the voltages look fine, depending on where the virtual ground (Vr, Vb, Vcc/2, etc.) is supposed to be
do you know what an audio probe is?

I took a working pedal and wanted to mod it (BAD idea).

ha! now you know.         forget about "modding", almost any circuit that people mod out there is simple and easily made from scratch anyway. get a breadboard!

[Linac Guy]

Hi Garcho,

thanks for viewing my post Sorry for the late reply (had to repair my daughters car). I have 4 pictures at the links here. http://imgur.com/TiB5EBp
http://imgur.com/TdqGGjs
http://imgur.com/fO5rC2E
http://imgur.com/wWULkDB

I do not have the power wire from the jack to the board soldered. I was using alligator clips so I could take the board out easily. Please let me know if you want pics of the board removed. Or anything else.

Bobby

[aion]

Here's the correct Dropbox link - I'm guessing the earlier one was an account-specific one:

https://www.dropbox.com/s/k3d93su9d48k8cd/aion-comet-ds1-documentation.pdf?dl=0

[Linac Guy]

Thanks Kevin, you have any thoughts as to what I might have done?

Side note:
This was only my second pedal to ever build. Both pedals I have built were Aion projects which I really like! I know there are a few other PCB's suppliers but Aion has great documentation which helps us new to this. Plus the people here on this forum are patient, helpful and seem to have fun.

Bobby