This installation of TCS EU621 Decoder is for HO Scale Trix BR 290 Epoche V Diesel Locomotive 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

The three upper pictures show the beautiful and very well made Trix BR 290 Epoche V Diesel Locomotive with its shell on, prior to the TCS EU621 Installation.


Here is the picture of the locomotive with its shell removed and original light board shown.


Close up of the 21Pin plug.


Remove the 21 Pin Plug.


Insert our EU621 decoder exactly as shown above.



This picture is a close up with the TCS EU621 decoder installed.

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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