Great! your layout has showed me the differencies! In my whole setup I have only one old BEO4 and this is why I wondered is it “kaputt”?
Well, now I know and accept the functions it offers: as I sad as a bathroom radio remote.
Thank you all for the support and the patience to help me with the problem. It is, also in new form, the best B&O forum.
best regards Ruedi