Hello Frank,
Here's an interesting request that isn't going away. As our Amateur Radio population purchases equipment that becomes 10 years old or older and the operator need service work performmed on the equipment, there isn't a service shop nearby or most Commerical Dealers with a service department won't touch an older rig because of parts availability and/or the time and cost to troubleshoot the failure itself.
I don't know if there's an answer for your request although since you're retired and probably living on a fixed income, I know there's a technical college in Prescott, AZ that teaches Electrical Engineering and perhaps you could contact the college for an undergraduate 3rd or 4th year student to troubleshoot and service your equipment. Your other option would be to look up in the Yellow Pages for a Kenwood Commercial Land Mobile Radio Shop in Flagstaff, AZ and ask them if you could bring the TS930S transceiver up to their shop so they could take a look at the problem.
There is one other option and this would be to contact Randy KK7TV in Phoenix, AZ and here's his web link:
http://www.kk7tv.com/index.html and then go to QRZ com for his Callsign look up and E-mail address.
If Randy can restore 40~50 year old Boat Anchor radio equipment, he most likely can repair your Kenwood TS930S transceiver.
I hope you were smart enough to purchase a Service Shop Manual for TS930S so any service facility would have the manual for the Schematics and Part numbers. Most likely Kenwood will
not have replacement Parts for that transceiver due to the age of the unit but any sharp service technician or engineer would be able to find alternate parts to repair your radio.
You have stated that the transceiver has an audio problem. I'll take a wild guess it's a receiver problem which could be caused by "intermittent" cold solder connections (through the printed circuit board) which is very common for Kenwood equipment and/or defective capacitors in the audio stage due to the age of the unit.
73,
Dan
WA9WVX