[EdHolland]

With the covers off, it was immediately clear that there was quite a bit of preparation needed before accessing the main board. The first order of business was to label the wire harness elements with the corresponding connector numbers - quite a few must be detached to remove and turn over the PCB. That is now completed, and I can see the solder side of the board. That lets me note the pin-out configuration of the filters. One test I could do is to bypass a filter with a 2k resistor, which will help ID the culprit. That approach worked very nicely on the other radio which had a similar problem.

Cheers

Ed