I replaced transistor TR20 and that fixed the LFO, but the manual trigger still didn’t work. I found that I had lifted the collector trace on TR20. I fixed that and everything works now and the LFO can be triggered manually as well. I used a 2N3904 and I’ll bet many other general purpose NPNs would ...

Don’t know if you still have the Juno or if you ever figured out what happened but I did the exact same thing the other day. The LFO still modulates the PWM but will no longer affect the DCO or the VCF (the sliders at those locations don’t do anything). I’ll have the synth back together soon and wil...

I suppose I should have mentioned that the LFO was working correctly before I shorted pin 18 to ground.

It would both modulate the PWM and and affect the DCO as well as the VCF - Both LFO sliders had an effect.

I see no waveforms on pin 20 of the bender board (LFO signal pin).

Hi! New here and just picked up a Juno-60. During cleaning, I noticed that the LFO trigger on the bender board wasn’t working. Took a look at the service manual and figured I would just short the high side of the LFO trigger (pin 18) to ground. Upon further inspection, I realized that the pin is not...