david707: but Im sure the LX2500 should respond to either v.tape v.tape 2 v.aux or v.aux2.
Nope! Because the LX2500 and LX2800 were not sold with the Beolink 1000, they were sold with the V terminal. So there were no V.TAPE button!
There are 3 AUX inputs on those sets: 1 is the audio input from a stereo, 2 is the Scart and 3 is the 6pin DIN A/V input. On the Beolink 1000 you access them by pressing <SHIFT> <TV> and then the right number. If i remember correctly <SHIFT><TV> is the same as V.AUX on Beo4. So to access the scart with Beo4, press V.AUX and then 2.
It wasn't until the later models (LX2502 and LX2802) that V.TAPE was introduced.