This installation of TCS T1 Decoder is for HO Scale Stewart F3A IV 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

      

Stewart F3A IV with its shell on.

    

Spread the shell at the tanks and slip it off the chassis by tilting it forward to clear the front coupler

 

Disconnect track power pick up wires from the copper power rails (circled in red ) and remove forward light's bulb (circled in red )

Place copper power rails back, solder four (circled in red) power pick-up wires and isolate the power rails from motor pads (see the picture below) so that they do not touch each other causing a short.

Cut out Yellow, Green, and Purple wires off of decoder's socket and solder black and red wire to the power rails of the Locomotive ( as shown below ). Keep in mind that the red wire goes to the right side of the frame when the train goes forward ( Engineer side ) and black goes to the left (fireman side)

Solder the Gray wire ( that comes off of the decoder's socket ) to the left ( "black side") motor's contact and solder the Orange wire to the right ("red side") motor's contact and make sure those two wires do not touch the frame at any points. Use a small piece of electrical tape to keep aluminum bulb's tube in its place and insert the bulb in the left tube's end as shown in the picture above.

Solder the White wire to the Diode's Cathode (-) and blue wire to its Anode (+) and isolate them with kapton tape. Insert T1 decoder into the socket, make sure all the wires are neatly placed on the locomotive's chassis, inspect for any possible shorts and place the shell back on . Test the Locomotive on the track.


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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