Installation of is for HO Scale Stewart Baldwin S-12 using a TCS WOW121 Decoder, AK-MB1 motherboard with Keep Alive™
and was performed by TCS.

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

Stewart Baldwin S-12 prior to installation.

To begin this installation, gently grasp the shell on the side and pulling outwards, lift the two part shell off the chassis.
You will notice the original LED lights were attached with a pressure fit connection onto the board.

Remove the original board, taking note of the wiring locations. Clip off these connectors from the wires, then trim, tin or lengthen them as necessary.

Trim the board mounting tabs (as shown in red in the above photo) level to accommodate the new AK-MB1 motherboard.


Shown with the board removed and the wires lengthened.

Using double sided foam tape, attach the AK-MB1 board to the chassis and solder the track and motor connections to it.

Solder new wires to the original lights leads and then onto the AK-MB1 board.

We have found that LED light output is brightest when shinning directly into the end of the light tube, but in some circumstances they may be placed along the length
of the tube as well with satisfactory results. In doing so, white light LED output would be least affected, while non white LED output will be more affected by placement.

Next, insert the 16mmx9.6mm speaker into the SH5-C Speaker enclosure, solder the wires to the motherboard and using double
sided foam tape, attach the assembly to the top of the shell.

Attach the WOW 121 Diesel decoder onto the motherboard.

Lastly, in order to keep the wires neat and prevent possible shorts, lace the wires into a bundle using lacing cord, which is a wax impregnated string 
used for wire bundling and making harnesses. There are many choices of lacing cord available from Digikey
We use part number 802534B BK032-ND

Reattach the shell. Your Stewart Baldwin S-12 is now WOWSound equipped and ready to run!

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

Like us on Facebook Subscribe to our YouTube Channel Join our newsletter
  Back To Top
Entire contents © Copyright Train Control Systems 2004-2018