- Written by Josh Baakko
- Category: DCC Projects
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Installing an NCE DA-SR Decoder in a Genesis SD75M
NCE includes amazing instructions, but here's a quick illustration anyways. This install applies to all early run Genesis SD70 series locomotives, to include: SD70, SD70I, SD70M, SD75M, SD75I, and SD70MAC. Later run locomotives look slightly different. Locomotives from the 2007 are quick plug equipped.
As stated, NCE included some great instructions with this decoder. This is mostly intended to be a visual aide to the NCE instructions.
I'm installing this decoder in Athearn's stock number ATHG6176, SD75M, BNSF/Heritage II #8258. At the same time I'll be replacing the lighting (most likely), detailing, and weathering the unit.
Removing DC power board
To install the DA-SR you'll have to remove the DC power board. I use a set of needle nose pliers to pull the black plastic friction caps off. There should be 8 large, end caps, and 2 small side caps. Be sure to keep them separate, and save them for later. Use your fingertip of tweezers to pull the wires out. Then use your finger to press the clips holding the board towards each other, this should release the old board. Discard the board (I sell mine!).