Ok, I reflowed and checked every pins, it doesn't help. But I found, that the top row of knobs effect on the sound though. So still, maybe I can check fv-1 without soldering? I slowly loose my faith, hope you can help me somehow))
Hi. Well, "Octogon" not working, just makes strange noise. I checked everything, analog part working properly, seems there's trouble with fv-1. So maybe I can check fv-1 without solder it off somehow? And yes, I bought it much earlier in other shop.