Atlas O TMCC No Sound

I guess that depends on how much you're willing to "tear into it".  A simple test is to check the speaker and the boards.  You can plug in a different speaker to the motherboard to see if the speaker has failed.  The two RailSounds boards can be popped into another TMCC locomotive to see if they function.  Those are probably two of the most common failure points if you have checked the wiring.  With that TAS board, most of the connections to the RailSounds boards are internal, so there' not a whole lot that would totally silence them if it still runs properly.

Check volume pot, speaker, wiring connections, RS power and Sound boards.  If it is the Sound board, pull chips and clean and reinstall.  G

Thanks GRJ,

Can you please tell which boards are what?  How are the top 3 boards attached to the large board beneath?

Hi Goerge,

I am in need of guidance,  I'm not sure what boards are which.  Do you simply pull the top boards away from bottom board?

The two boards farthest from the smoke unit are the two RailSounds boards.  Also, if you decide to try to reseat the PLCC chips, you MUST use a PLCC extraction tool, don't pry at these with a screwdriver or other tool!

The boards simply pull straight up off the pins.  When replacing them, make SURE you don't get them off by a row of pins, that's a board killer.  As  rule, I just pull the chips straight up, then reseat them.  This will clear any oxidation between the socket and the chip.

George is right, check the volume control, it's the other part that can cause no sound.  I've included a link to the TAS manual for the EOB board, it will be useful in troubleshooting this issue.

TAS EOB Installation and Operation Manual