This installation of TCS A4X Decoder is for HO Scale Athearn Genesis F3A and was performed by Benton Barlett of Brevard,NC

Important Soldering Tip:
Please do not use any flux either liquid or paste on the mother board. It will damage it. Use only Rosin core solder approved for electronics use.
We recommend to use only Kester "44" rosin core, SN63PB37, .015" diameter, part number 24-6337-0007.
This can be ordered from Techni-Tool under Techni-Tool part number 488SO157

http://www.techni-tool.com

This is a photo of the installation of an A1X (now the A4X)decoder in an Athearn Genesis F3A.  The installation is very simple. The decoder installation in a B-unit is the same except no lighting to deal with.  Athearn wire clips do not fit your board ( or probably anyone else's). Therefore I wound up soldering the leads to the decoder board. Since you have to remove the Athearn board I guessed properly that one needed  to add a resistor. Unfortunately I found that 560 ohm was not enough. So I installed a Miniatronics 1.5v bulb with a 620ohm resistor and  it works fine.

 

Athearn Genesis F3A A4X Decoder Installation


Other solder tips: When stripping wire, only strip a tiny little bit of the insulation. Strip no more then a 1/64 of an inch. When the wire gets tinned with solder the insulation will shrink back more. Try to not expose any more wire then half the length of the solder pad at most. In no case should solder or exposed wire wire ever be outside the boundary of the the solder pad you are attaching a wire to.
Click here for important information on properly Stripping and Tinning wire

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