Miami Joe, thanks for your response. And I am feeling better, every day.
First, though this was a 10-6, I am not sure when the waste-retention toilets were installed, whether any of the old 10-6's got in on that or not.
Perhaps somebody can answer that since I seem to have forgotten at least for the moment.
I am not sure if the designation "heritage equipment" had yet been applied. I do know the Crescent was definately Amtrak at this point, no longer Southern R.R.
What I do know is that a mechanic actually got on, probably in Gainesville (I was en route from ATl to NYP) and actually stayed on the train until the next stop up the line, probably Toccoa, during which time I sat in a not-yet-occupied roomette, or probably also went to the lounge car. He tried diligently to repair it, whatever was wrong with it, but he finally gave up, saying, I guess, it would have to be fixed in NYP.
At which point I was escorted to a lovely double bedroom, my first time to ride in one.
I remember asking the conductor if I would have to go back to a roomette the next morning as people gradually began deboarding up the N.E. corrider and he said, "No, this your room for the rest of the trip".
While I cannot answer your question mechanically,I must say I was impressed with Amtrak's efforts, getting some kind of trouble shooter to board the train and attempt to repair it en route like that.