Hi 5thumbs (I'd *love* to hear you tapping a 5 string bass he he), thanks for sharing.
If someday you could post a couple of pictures, including some "guts", they will be welcome.
We can always learn more, anyday.
Hi Phatt
Yes, you are right.
Another error is the undefined connection between D42 and D45.
I usually fiund many "official factory" schematics, with dumb unexplained errors.
I guess that they are there on purpose, so any technician will recognize them as such, and in a service situation, the dead amp is there, on the bench, and the actual wiring can be checked, but a non-tecnician, who can read a schematic and solder but not really understand design, will fail when trying to clone something, based only on an Internet downloaded schematic.
Even worse are "reverse engineered" schematics, when some component is not accurately read or some tracks get mixed.