I like the sound of the F90 but every 20 minutes or so it produces a medium loud "popping" sound.
So I went ahead and purchased a cap/transistor replacement kit from a guy in Australia(!). Although I haven't checked the kit, I doubt it includes the component shown in the pic, which is the only component that looks bad visually to me.
Diode I guess? I have the service manual but I am not trained in electronics and this schematic is a bit complicated for me, I am really just a DEOXIT technician :)
Can anyone advise? Certainly looks bad. It is not broken or crumbly, just has that ugly crust on it.
I do have schematics in the sm I could photograph...
