Replacing the Sound Module in a Bachmann Spectrum EM-1 Locomotive.

Need to replace a Bachmann Spectrum EM-1 sound module? Be careful!

Fig 1 Standard 21 Pin Decoders Not Compatible

The key take away here is that standard 21 pin(Soundtraxx Economi, Tsunami2, TCS 21 pin, etc.) are not compatible with the sound module that accompanied the EM-1. One option is to install a Soundtraxx TSU-2200 decoder. How to do this is explained in this video from Soundtraxx.

Another option is to install a DecoderBuddy motherboard by NixTrainz and the 21 pin decoder of our choice.

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