Digitrax sound decoder install problem

[MichaelT]

Evening,

So I got spunky and picked up a Digitrax SDN1440A0 Sound FX decoder and installed it in my Atlas Mopac GP38-2...installation went pretty well, checked everything when I got the decoder installed before putting the shell back on.

After I put the shell back on and ran it, the engine runs for about five seconds then resets, runs about ten or so seconds and resets...runs for a bit (couple minutes) then resets...

I'm a little perplexed at what might be happening...I'm guessing something is shorting out but I'm not sure where to start looking???

OH, the sound is SO COOL!!!!

[ednadolski]

Sometimes the factory capacitors on these things are just too small, and installing a larger capacitor can make a difference.

If you do install an electrolytic capacitor, make sure you observe correct polarity.

Ed

[ednadolski]

These are for a different decoder, but still may be of interest:

http://www.trainboard.com/grapevine/entry.php?2287-Install-the-Digitrax-SDN144K1E-sound-decoder-into-your-N-scale-FVM-GEVO-part-1-of-3
http://www.trainboard.com/grapevine/entry.php?2288-Install-the-Digitrax-SDN144K1E-sound-decoder-into-your-N-scale-FVM-GEVO-part-2
http://www.trainboard.com/grapevine/entry.php?2289-Install-the-Digitrax-SDN144K1E-sound-decoder-into-your-N-scale-FVM-GEVO-part-3


Ed