Reply 20 of 36, by Frunzl
Replaced U22. Works perfectly now.
Thank you both for your extremely valuable help.
I am pretty surprised that this issue is not discussed in detail anywhere else, since even I myself have a second model with exactly the same problem. So it seems to be fairly common.
I found a handful of forum threads describing a similar or the same defect, but there never was a solution. If anyone has a similar issue, drop me a pm, I do have 8 spare opamps 😀
Below is the new opamp in place, please excuse the bad soldering job especially for R62, as well as the flux residues. Everything will be nice and clean, but I still need to replace the line-in jack 😀