Finally gained access to manuals, etc. which fortunately, already have.
Also, with respect the volume control on the master controller, I finally got to work with a tiny cleaning of the volume wheel from the rear side. The additional 5500 Master Controller that i sent for will have to go back--it's not working as promised.
Once you get these things set up--wow. Get sound and capabilities.
(I have the 5500 system with Beogram CD 5500, Beocord 5500 cassette, Beogram 5500 phono, and radio all working through the master controller to a pair of quite tall Beolab Penta speakers.