I started discussing this in another post, but I want to get input specifically on the TAS TMCC components.
My circa 2002 3rd Rail Niagara (seems to have never been run) has a TAS SAW board, with a "Rev 3" stamp on it. It has a fan driven smoke unit, and a TAS Puff-N-Chuff board. The smoke unit produces no smoke, and the fan does not function with the Railsounds chuffs.
The first steps I took were to reprogram it. Following the directions:
ENG + ## (any number from 1-99) + SET (under the bottom cover of your Cab-1) The horn will blow and the front light will flicker. Now press; ENG + ## (the one you just set) + AUX1 + Whichever number applies in the chart below. The horn will sound again.
I used "4" for steam with smoke. Of note, the horn (whistle) does not sound on the last step, unless "SET" is pressed. All the TMCC sound/control functions seem to wok properly, other than the smoke.
Below is a picture of the SAW board, and the closest SAW diagram I can find. They are slightly different. Mine does not have the 3 pin connector for the smoke unit; the connector at that location is a 2 pin connector (in red circle) with the brown wire. Also, the battery connection is soldered to the board, with no connector. The chuff input also varies.
I checked the voltage at what I believe to be the smoke unit hot lead (brown wire) with strange results. It reads 0.0 volts, and regularly flickers to 6-7 volts for an instant every second or so. What is going on here?
And for the second part of the problem, the fan does not run/pulse with the chuff. As my SAW board differs from the diagram, and does not have the "Chuff Output" pin, can anyone please advise me where the chuff output connection is.
I would like to see if these problems originate in the tender before I extract the smoke unit from the boiler.
Thanks,
Jim