regarding test 8: the powersource doesnt has to be 5V. The specifications states >2.5V, so maybe a coincell battery or two AA will do for testing.
Regarding test 12: single components may not work because og the difference in Audio Link, And Audio Aux lin. Dont know which the DVD use though, so might be something working.
Regarding test 13: Take a look on the diagram of the BS1 in the servicemanual. Pin 7 is called dataOut, so might control a tape recorder. Pin 6 is called data in, so I guess its not two way communicationif it works at all. Actually pin 6 and 7 is stated as not connected in the specifications for the BS1. Therefore its only on the diagram its shown
Thanks for all this Mads – very useful.
I don’t hold out much hope for the BS1, but who knows with B&O!