Re: Mad Bean Modulaterator
Posted by Ciaran Haslett on
URL: http://guitar-fx-layouts.238.s1.nabble.com/Mad-Bean-Modulaterator-tp32614p32751.html
Sorry man...was at a RHCP gig last night. Jesus they need John back
Well pin 3 and 6 are connected to each other so they should have the same voltage. They are also connected to the vbias network 9V > 100k > 100k > GND, where the junction is 4.5V.
So your pin 3 had 4.5v but 6 was 0? It must be a cold joint or a dead IC.
Putting a 1M between that row and ground fixed it? That almost sounds like the bottom 10K in vbias wasn't connected properly and the new 1M took its place. 9V > 100K > 1M > GND. Again sounds like a cold joint.
So I can only suggest reflowing your joints.
Clean between every strip, especially the IC pins
Personally i'd just build it again and socket the IC. You're already way more hours into debugging than it takes to make another.
URL: http://guitar-fx-layouts.238.s1.nabble.com/Mad-Bean-Modulaterator-tp32614p32751.html
Sorry man...was at a RHCP gig last night. Jesus they need John back
Well pin 3 and 6 are connected to each other so they should have the same voltage. They are also connected to the vbias network 9V > 100k > 100k > GND, where the junction is 4.5V.
So your pin 3 had 4.5v but 6 was 0? It must be a cold joint or a dead IC.
Putting a 1M between that row and ground fixed it? That almost sounds like the bottom 10K in vbias wasn't connected properly and the new 1M took its place. 9V > 100K > 1M > GND. Again sounds like a cold joint.
So I can only suggest reflowing your joints.
Clean between every strip, especially the IC pins
Personally i'd just build it again and socket the IC. You're already way more hours into debugging than it takes to make another.
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