This installation is for a HO-Scale Atlas GP39-2 Phase 1 using a TCS WOW121-Diesel Decoder, AK-MB1 Motherboard with built in Keep Alive™, and UNIV-SH1-C WOWSpeaker kit.


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
The WDK-ATL-3 WOWKit was used for this installation:

AK-MB1 Motherboard

WOW121-Diesel


UNIV-SH1-C WOWSpeaker Kit


Click here for more information on the WDK-ATL-3 and the rest of the WOWDiesel Kits line.

HO-Scale Atlas GP39-2 Phase 1 prior to WOW121-Diesel Decoder, AK-MB1, and UNIV-SH1-C installation.

To start off this install, we must first remove the front and rear couplers and their housings. Once that is complete, the shell will lift off of the chassis.

With the shell off, we can now remove the factory light board. First remove any wire clips and disconnect the wires from the board.

Once the wires are loose, the factory light board can easily be unclipped from the motor mount.

Now with the factory light board removed, we can now clip in the AK-MB1.

Next, solder the lights, motor, and track pickup wires to the AK-MB1 according to the wiring diagram in your motherboard manual. This can all be done without removing the front weight, but if you find it too cramped soldering under the weight you can remove it by removing the screw at the very front of the weight.

This engine comes supplied with LED's. The AK-MB1 is configured for LED use and has built in current limit resistors in series with the light outputs for LED use so we added no additional resistors.

With the AK-MB1 mounted, we can now solder some wire leads to our speaker and place our speaker inside the UNIV-SH1-C speaker housing.

With our speaker mounting in the housing we glued the complete package up into the shell as seen below.

NOTE: You must be very careful to avoid getting glue on the speaker cone. Glue on the speaker will ultimately cause it to produce no sound and fail.



Lastly, solder your speaker wires to the AK-MB1 and plug in your WOW121-Diesel decoder.

With all three main components mounted, we can now close up the locomotive and reinstall the coupler assemblies.

Be sure to be mindful of wire routing and reassembly of the shell as to not damage or foul the installation.


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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