To SCLJA: Thanks for the quick answer Scott. I don't quite understand the need for an adaptor cable since the alpine unit has a 10 point plug in. Do you mean the chm-s630 does not have the 10 pt. plug. Maybe that's it. What is m-bus? I haven't tried your way of removing the cartridge but will let you know how it worked later.
Thanks for help!

The adapter converts the cars 10 pin rectangular connector to the alpine 8 pin round din connector. Alpine M-bus is the earlier cd changer format and Ai-net is the later format (units that are ai-net have an A in the model # and M-bus has an M in the model #)

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