Thank you, Ernst, for your reply and suggestion.
While exploring the guts of my machine I notices that the belt was looking pretty sick. I ordered a new one, spent the better part of my day studying the manual and anything else on the Internet relevant to its replacement, as well as looking for scanner information. With your information I'll deal with the scanner once the belt arrives and I get to play surgeon on my baby Z.
Stay tuned. When this event happens, I'll need all the cheering squad I can get.
Howard