One thing I've noticed is that there are two different CPU Units used in these rigs. They aren't readily interchangeable given the location of one of the connectors on the rear of the unit. The wiring harness in an older version is about 1/2" too short for the mating connector to plug onto its CPU Unit complement.
An FYI for those with a flaky CPU Unit. The newer one uses right-angle headers mounted on the vertical walls of the unit enclosure, while the older version used straight headers and a slightly larger PCB. An older CPU Unit SHOULD work in a newer radio, but double-check the identity of all connectors on the back of the unit
73 - Fred, N8YX
