Need help to find what's wrong

Discontinued DIY products Shruthi
#1

Hello all,
I assembled my shruthi-1 last night but it doesn’t seem to work well:
When the pole jumper JP3 is at position 2, I have some sound.
When the jumper is at position 4, I only have a ‘pop’ when pressing a key and a very very small sound.
When I’m trying to tune the Reso trimpot there is no oscillation at all at both position 2 and 4.

I double checked the position of all componments and solder bridge.

I haven’t sleep enough the two last weeks because of work, and that’s probably the main problem.

thank you.

#2

Check for bad soldering joint or wrongly oriented parts around IC9 (the second LM13700). It looks like the first 2 poles of the filter are working, but the next 2 ones (handled by IC9) are kaput.

#3

The platypus that came with the kit found the problem, wich was a bad soldering joint but in the front side of the board (don’t ask me how I did that ).
Anyway thank you!

This little beast has a fat sound!