This installation is for a HO-Scale Bachmann GP30 using a TCS WOW121-Diesel Decoder, IB-MB1 Motherboard and 35mm X 16mm WOWSpeaker.

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 Bachmann GP30 prior to WOW121-Diesel Decoder, IB-MB1 Motherboard and 35mm X 16mm WOWSpeaker.       

To start off this install, we must first remove the two screws indicated above that are located underneath the fuel tank.

Next, remove the two screws on the frame under the tank as indicated above.

With the board off, take note of the wiring to be sure to replace it in it's correct location. At this point, remove the screws located at each end of the
original lighting board as highlighted above. Unsolder the wires and remove the board.

Shown with the original lighting board removed. Trim, tin or lengthen the wires as neccessary.

Underneath the locomotive chassis are three hardwired yellow resistors, carefully remove these, leaving the larger two ones in place.

One each end of the top of the frame there are two metal nibs. Trim these off with snippers to allow for the installation of the IB-MB1 motherboard.

Using foam, double sided tape, mount the IB-MB1 to the top of the frame and solder the motor and track leads in place.

With this done, solder the speaker wire leads to the IB-MB1 motherboard and place the 35mm X 16mm speaker into the UNIV-SH1 enclosure. Using the same foam, double sided tape, securing it to the frame as shown.
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.
Plug in your WOW121-Diesel decoder.

Taking the original lighting board, remove the original led from the board.


Solder new wires leads to each led and with a dab of hot melt glue, mount each one to the rear of the light lens at each end of the shell.

Solder the lighting wire leads as indicated in your wiring diagram to the IB-MB1 motherboard. This board comes with LED resistors already in place for this purpose.

Lastly, in order to keep the wires neat and prevent possible shorts, lace any loose wires into a bundle using waxed lacing cord.
Now you can close up the locomotive and reinstall the tank assembly. Be sure to be mindful of wire routing and reassembly of the shell as to not damage or foul the installation. Your Bachmann GP30 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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