Did several things.
1. In A unit, odesy was on, turned it off. Smoke was on, turned that off too. In fact all the switches underneath seem to be installed backwards so on is off and vice versa. The turn-off problem seems to be intermittent since in the last run it shut off properly.
2. The B unit. Seems to be a major problem. Took off body and attempted to run it from wires touching roller and wheel. Worked for moment then stopped. Took straight 12 vDC and connected directly to motor input. Both motors ran perfectly in both directions. Pulled the AC plug to the board where rollers come in, put AC there. Nothing happened, saw smoke, heard "POP" and then nothing. Checked every wire and all were in place, not shorting, not loose. My opinion, main board is toast.
I'll take it to Roundhouse Trains and have them evaluate. This unit never ran very well or very long. It's no longer a new unit, and warranty is no longer an option.
I still like MTH DCS in conventional.
Thanks for all the input.
