Stewart F7A Early Phase I

Scale:
HO Scale


This installation uses the following decoder:


This installation documentation is for the HO Scale Stewart F7A Early Phase I. This installation uses the MC2P-UK decoder, and was performed by A.G.





The pictures above show the locomotive prior to the decoder installation.
The pictures above show the locomotive prior to the decoder installation.


Detach the front coupler by removing the screw circled in red.
Detach the front coupler by removing the screw circled in red.


Detach the rear coupler by removing the screw circled in red.
Detach the rear coupler by removing the screw circled in red.


The picture above illustrates the original light board after the shell removal.
The picture above illustrates the original light board after the shell removal.


Remove the 8-pin "dummy" plug.
Remove the 8-pin "dummy" plug.


Plug in the decoder so that the Orange wire lines up with Pin #1 of the socket. Pin #1 will be designated with a "1" or a small arrow/chevron.
Plug in the decoder so that the Orange wire lines up with Pin #1 of the socket. Pin #1 will be designated with a "1" or a small arrow/chevron.


Here is a close-up picture of the decoder installation. Re-install the shell and couplers to complete the installation.
Here is a close-up picture of the decoder installation. Re-install the shell and couplers to complete the installation.



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

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