Resources for learning about LFOs, specifically for a chorus

[drummer4gc]

Hey everyone,

I've got an older Guyatone Bass Chorus PS-028 that isn't chorusing. I've got a signal out of the mn3207, but no warble. I'm fairly certain the LFO is no good - I should be able to audio probe the op amp responsible and hear some popping on the output, right?

Anyways, I'm trying to understand a little more about how a two pot (depth and speed) LFO works in a chorus circuit. I don't have a schematic for this pedal, but it seems to be similar to the Japanese-made Boss chorus pedals, like a ce-2:



I've tried replacing the TL022 with no luck. I've done some searching on this forum and Geofex, but wasn't able to find anything that met me at my current level of understanding. I'm also totally open to suggestions about another place to start reading up to improve my understanding of op amps or whatever other knowledge is required to comprehend this type of LFO circuit.

Thanks!

[Kipper4]

hows this

http://circuitworkshop.com/forum/index.php?topic=215.0

http://www.diystompboxes.com/smfforum/index.php?topic=94459.0