This installation of TCS EU621 Decoder is for HO Scale Trix Tenderlokomotive T12 K.P.E.V. and was performed by A.G.
The three upper pictures show the beautiful and very well made Trix Tenderlokomotive T12 K.P.E.V. with its shell on, prior to the TCS EU621 Installation.
Remove the plastic cab as shown.
Remove the front plastic tank that is marked in green.
Remove both phillips crews marked in green.
Gently lift the locomotive shell off of the chassis as shown above.
Be careful not to damage the wires that connect the motor with the forward light.
Remove the rear phillips screws that are marked in green.
Using small phillips screw driver, remove right screw.
Using small phillips screw driver, remove left screw.
Remove the weight shell as shown in the picture above.
Here is the close-up of the original light board.
Gently remove the plastic light pipe.
Plug our TCS EU621 decoder exactly as shown above.
This picture is a close up with the TCS EU621 decoder installed.
This is the completed installation with the light pipes reinstalled. After this just reverse the steps you followed to remove the shell. Your locomotive is ready to run!
Important Soldering Tip
Please do not use any flux either liquid or paste on the mother board. Over time, the acidic properties of liquid or paste flux will begin eating away at the fiberglass PCB and will damage it. Use only Rosin-core solder or no-clean flux approved for electronics use.
TCS recommends the use of Kester "44" Sn63 Pb37, .015" diameter Rosin-core solder. Kester part number 24-6337-0007.
You can order this solder from the following retailers:
Digikey - PN:KE1110-ND
Techni-Tool - PN:488SO6775
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