Hi Mat I have most of those.
I'm most interested in the schematics for these:
SL 542 EQ
SL 511 Line In
SL 555 (Non F Version)
SL 557 (Non F Version)
SL 594 Subgroup Module
I may even have some of these in my storage, as I have an original 5000 service manual, but with 100s of boxes to go through after
a move 4 years ago. Who knows when I will find them. Opening up the storage door is like hitting a brick wall. And then the climing.