This installation of TCS A4X Decoder is for HO Scale Atlas GP7 and was performed by A.G.


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

The three upper pictures show the beautiful Atlas GP7 with its shell on.

 

Here is the picture of the original light board

 

Remove plastic isolations from all pins and remove all wires including wired LEDs

 

Here is the picture of the original light board removed from the chassis.

 

Place A4X on the chassis' clips and using the manual that came with the decoder, solder all wires as shown in the picture above. Both LED lights came with voltage limiting resistors.


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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