REPAIR UPDATE:
Sharp GF-9191 FM no longer intermittent, tape deck plays at correct speed! FINALLY 100%!
Sharp GF-666: Picked up from technician plays out of both channels, cracked solder isolated and repaired, power switch replaced ($90 bill).
Sanyo M9990: Belts replaced, deck and radio sound GREAT. Scored a power cord for it from the technician who fixed the GF-666, which was an issue due to the batt/AC switch being very sensitive... The box is 96%, Issues are LCD has a couple of segments out, it is missing one of the little chrome caps on a switch up top, and it has a red-tip replacement antenna. Sounds awesome, though..
Panasonic RX-F9: finally got into the deck, All belts were there and actually looked good. Something deep inside is jamming and the take up reels can't keep up with the capstans... Ran out of time, gonna use the Digisette on this one.
GE - BenzBox: I'll be using line-in on that one only. Radio does not tune, tape deck needs belts and possibly more.
I'm bringing 11 boxes total, only two have non-working decks!!!! That's a ratio I can live with!
See you guys in about 32 hours!
JT