Athearn SD40-2

Scale:
HO Scale


This installation uses the following decoder:

T1



This installation of TCS T1 Digital Decoder is for HO Scale Athearn SD40-2 and was performed by A.G.

Shown with the shell on, prior to decoder installation.
Shown with the shell on, prior to decoder installation.


Front of the locomotive.
Front of the locomotive.


Back of the locomotive.
Back of the locomotive.


Remove the circled in red "part of the shell"
Remove the circled in red "part of the shell"


Remove the original "dummy" plug.
Remove the original "dummy" plug.


Here is a picture of the original light board.
Here is a picture of the original light board.


Connect the T1 decoder and place it in the shell as shown above.
Connect the T1 decoder and place it in the shell as shown above.



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