Elevation motor stopped working....

My lx90 scope was working fine until the other night and the elevation motor stopped...the hand box indicated that the motor was not working.
I reset the system, and the elevation motor worked erratically, on, off, on, off....so I reset it again, and now no elevation motor function at all. The rotational motor (azimuth?) works ok... all speeds ok, but the altitude motor won't function.
I would like to get a hold of a break-away parts diagram and any help to get this motor running again.

wpyles@insightbb.com