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TAS Ucub board

CS Chuck SartorOGR Forum Member

It has been awhile since I worked on one of these. Got one brought to me for repair. A couple of questions. With this add on board for MTH protosound 1 to add TMCC capability (In this case a Railking Doodlebug).  I can't get the motor sound to idle as there is always around 12 volts to the board. I can turn the Cab 1 remote dial counterclock wise and it will go to an idle sound for a brief moment, then it jumps back to medium speed running sound again (while the doodlebug is stopped or running slow)  2nd, does the PFA get forfeited with this board? I can't get the PFA to operate at all. Am I not operating this right? Can't get either of the functions mentioned to operate in conventional either. Any help is welcomed. Thanks.

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gunrunnerjohngunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

I found these boards to be pretty finicky as to operation, and I also had some PS/1 boards that they didn't seem to play well with the UCUB.  I liked the concept, but the execution left something to be desired.  I recall you had to have reset the PS/1 board to a specific state before installing, perhaps that's where the issue lies?

The guy that should know is Mike Reagan, perhaps he'll have better insight?

CS Chuck SartorOGR Forum Member

Yes, the Protosound board has to be locked in forward, which I did.  I can get the single horn honk  while holding the bell button down while I am operating in cab one TMCC to engage the PFA. The problem is when I hit the direction button the activate the PFA sequence, the doodlebug goes into reverse instead.

From doing some online reading, I guess there was a original UCUB, and later a UCUB2 which worked better for MTH protosounds boards. I guess I have the original version.

Last edited by Chuck Sartor

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