Hi Lee,
I did a very quick look is all.... Replaced the two counter belts so a tape will continue to play. There is a motion sensor driven by the counter belt. If the sensor does not detect motion it turns the play function off after a couple seconds. The FF and RWD don't work hopefully just because the idle wheel rubber material is very hard.
The right channel output pegs the output meter with non-tape signal (ie even when the tape is stopped) and the left channel is similar but much lower in level. Not sure what is going on but did not have any more time to investigate. Did not try the record function.
I downloaded a CTF9191 service manual and it looks to be fairly similar so that is good. It looks cool with the other Pioneer RTR decks.
Thanks,
Robert