MOTM

I just finished the 410 tonight, the filters work fine as do the depth &
sweep controls however, I cannot get the internal LFOs to work. My rate
knob does nothing and upon further investigation I found that the TL074
op amp is getting VERY hot. Any ideas? I double checked all my
connections and solder joints, everything is in the right place and
facing the right way. I cannot figure it out, any help would be
appreciated. Thanks -Nate