This installation of TCS T1P-MH Digital Decoder is for HO Scale Atlas Silver Dash 8-40CW 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 Atlas Silver Dash 8-40CW with its shell on.

Remove the fuel tank by sliding both of its sides off as shown in the picture above. There are two screws underneath of the locomotive chassis that holds two couplers. Unscrew the front screw as well as the back one that hold the coupler pockets to the chassis and remove both coupler pockets.

Gently remove the metal chain that is placed between the shell and the trucks as shown in the picture above. Grasping the shell by the solid area between the grills, lift the shell straight up and off of the chassis.


Picture of the locomotive with its shell taken off and the original light board and DCC plug.


Here is a close-up of the original lighting board where DCC plug can be seen (circled in red)



Here is a picture of the completed T1P-MH (T1 with medium harness) decoder installation. Black, electrical tape was used to fix the decoder to the Locomotive chassis so that it stays in one place which makes shell placement easier.


When placing the shell back on one needs to be careful not to pinch any wires. All points that need extra attention are circled in red (picture above)


Here is a close-up of the front light contacts


When placing the shell back on the chassis make sure the front light connecting pads are properly lined up and make electrical contact with chassis shown above.

Hold the shell in one hand and the chassis in your other hand. Lining up the front of both pieces, lower the shell onto the chassis, keeping the lower edge of the shell parallel with the chassis. Do not forget to attach both couplers , and the metal chain back to the chassis.


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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