This installation is for a HO-Scale Stewart VO-660 Phase 2 using a TCS WOW121-Diesel Decoder, KA4 and a UNIV-SH4-c speaker.
This install 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

HO-Scale Stewart VO-660 Phase 2 prior to WOW101-Diesel Decoder, KA4, and UNIV-SH4-C installation.
To start off this install, first lift the shell off by squeezing either side and lifting it upwards.

Shown with the shell off, we can now remove the original lighting board by gently lifting it off the motor mount tabs.

Shown with the original lighting board removed. Trim, tin and lengthen the wires as necessary.

Using the same motor mounting tabs, secure the AS-MB2 motherboard to the frame and solder the motor and track leads to it.

With this in place, securely mount the 25 X 14mm speaker into the SH4-C Speaker Enclosure and using foam double sided tape attach the speaker asssembly to the front of the frame as shown. With this in place we can solder it to the motherboard. We have found that a port in the enclosure greatly enhances the sound.
In this installation, the port should be facing down.

With the speaker assembly installed, using hot melt glue, mount the KA4 to the rear of the frame and solder the leads to the motherboard.

In this installation, we utilized the original lights that were in the locomotive and simply wired new leads to them.

Plug the WOW121 decoder.
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

Now you can 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. Your Stewart VO-660 Phase 2 is now WOWSound equipped and ready to roll!

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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