Did it work before you sent it to Denver? and did the same bloke look at the Beosound 9000????
The servo pcb is part of the cd module. The pcb drawings and cd set up procedure are in the manual but I'm not sure what part. It is page 5-13 of the manual.
The parts are available from any good electronics store. C2103 is originally 33microfarads 16volt but these are hard to come by. I use 47micro 25volt as replacements.
There have been several other threads on this on the forum if you do a search.