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troubleshooting old Fatpants V2

Started by jtn191, April 18, 2022, 01:10:26 PM

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jtn191

Hey all,
I'm trying to troubleshoot an old Fatpants V2 build...it's making some weird noises and my first guess is that it's something power or jfet related. thought maybe the jfet pinout was off but my J201 is positioned like how the board shows it. Maybe the charge pump?
measuring voltages...for one it doesn't seem like I'm getting the 17v past D3. Will look for other posted voltages...
thanks for any help!
It does respond to volume and body controls

Project doc
https://drive.google.com/file/d/1qMvatorv5eq7WHIRFC80zhYsmbXY8ATm/view?usp=sharing

Odd sounds I'm getting:
[soundcloud]https://soundcloud.com/user-991616480/monday-at-8-54-am?utm_source=clipboard&utm_medium=text&utm_campaign=social_sharing[/soundcloud]


jtn191

#1
fixed! just swapped out the MAX 1044 for another

I think what had happened is that I have the 17v pad tapped for an output...and using that to power my OCD probably messed up the 1044, I read in another post that it's probably not the right polarity or something...so I'll be cautious of trying that again