Compared to the BM5500 the data signals on the MCL and AUX is connected to different pins on the Microcomputer in the MCL2AV, and might therefore have differences that makes them incompatible, so this might only work for certain Beomasters/Beocenters where the signals are internally connected.
That’s a logical explanation – I can’t think of any other reason for this anomaly. I would test this with mine but I don’t have a controllable input device other than the OneRemote radio which may behave differently. I don’t have a chance to test until next week, but will see what I can do.
EDIT: And great work fixing the MCL2AV!! 😀
