This installation is for N Scale Atlas GP38 and uses TCS AMD4 Decoder and was performed by Jim Starbuck of Clinton, Iowa

Before AMD4 decoder installation. Photo shows original light board.

  AMD4 decoder installed.

Photo below shows loco frame disassembled.  Although it looks like a big job it is actually very simple. Once the two screws are removed,  the frame separates. The original light board is easily removed and the AMD1 decoder easily installed. Use care in alignment of the frames, motor mount, and gears when re assembling.  The trucks can be put on last, they snap into place.

 

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