SoundTraxx Tsunami TSU-GN1000 Installation and operating instructions

Athearn Genesis GP38-2
Tsunami Digital Sound Decoder Installation Notes
Overview
This application note describes how to install a
TSU-GN1000 digital sound decoder into an Athearn
Genesis HO GP38-2.
Skill Level 2:The entire installation can be completed in
one to two hours with no modification required to the
model.
Bill of Materials
Part No. Description
828058 TSU-GN1000 for EMD 645 Non-Turbo
810113 16mm x 35mm Oval Speaker
Evergreen P.N.
9040 1mm Sheet Styrene
175 2.5mm Strip Styrene
For your convenience, Evergreen part numbers have been
listed above. Please visit their website at
www.evergreenscalemodels.com.
Tools You Will Need
■ 25W Soldering Iron
■ Rosin Core Solder
■ Wire Strippers
■ Wire Cutters
■ X-Acto Knife
■ Miniature Screwdriver Set
■ #55 Miniature Drill Bit
■ Pin Vise or Electric Drill
■ Aquarium Sealant / Silicone
■ Liquid Plastic Cement (Tenax 7R or equivalent)
■ Masking Tape
■ Small Pliers
■ 6”28 Gauge Wire
■ Miniature Saw for Plastics
■ File for Plastics
■ Metal Straight Edge
■ Dial Calipers

Installation
1. Start by removing the Phillips screws holding
the coupler boxes in place at each end of the
locomotive. Remove the coupler boxes and set
aside. (Photo 1)
2. Gently remove the shell from the frame. The
shell should just lift off of the frame to expose
the factory circuit board. (Photo 2)
3. Familiarize yourself with the locomotive’s
wire placement and mark with masking tape.
Remove the small black clips holding the wires
to the circuit board. Pull the wires out of the
mounting tab on the circuit board.
The model that we used for this document did
not have ditch lights. However, some models
may have the ditch light wires attached to the
headlight output. If the ditch lights have not
already been separated, do so now and mark
both wires for each lamp.
Note: To determine which wires are for which
lights, use a 1.5V battery (AA) to apply power to
one wire on the positive terminal and to each
of the wires on the negative terminal one at
a time until a light illuminates. This will help
determine which wires lead to which light.
Use masking tape to mark the wires’functions
accordingly.
4. Remove the circuit board by using a small
flathead screwdriver to press on the tabs that
hold the board in place. Then, lift the board out
of the model. (Photo 3)
5. Remove the weight from the back of the
locomotive frame by removing the two screws
and lifting off. (Photos 4 and 5)
Photo 1
Photo 2
Photo 3
Photo 4
Photo 5

10. To install the speaker, start by soldering a
3”piece of 28 gauge wire to each speaker
terminal. (Photo 8)
11. Lay the speaker face down on your work
surface. Use the baffle template located at
the end of this document to build the walls of
speaker baffle from the sheet styrene. Drill two
small holes in the indicated side big enough to
allow the speaker wires to be threaded through
it. Cut the pieces as indicated and attach them
to the sides of the speaker using liquid plastic
cement. Thread the wires through the holes.
(Photo 9)
12. Next, cement the top of the enclosure to seal
the speaker baffle completely.
13. Seal the four holes on the front of the speaker
and any gaps with silicone. Allow to fully dry.
14. Solder the wires to the S+ and S- terminals (5
and 6) on the decoder. (Photo 10)
6. Install the TSU-GN1000 using the mounting
tabs for the factory circuit board. Place the
decoder over the mounting tabs and gently
press down. (Photo 6)
7. Attach the track pickup (1, 4, 9, and 12)
and motor (7 and 8) wires to the correct
tabs following the diagram at the end of
this document. We recommend that these
connections be soldered. After soldering, you
can use the plastic clips removed in Step 3 to
cover the connection.
8. Test the decoder for operation by placing the
locomotive on your mainline, selecting address
3, and running it in both directions. There will
be no lights at this time.
9. Next you will need to fashion a support for the
speaker assembly. Cut two 36mm pieces of
2.5mm strip styrene. Silicone into place over
the rear driveline of the model. Set the model
aside and allow to fully dry. (Photo 7)
Photo 7
Photo 8
Photo 9
Photo 10
Photo 6

16. Cement the speaker, facing up, to the top of the
styrene“frame”above the rear driveline using
plastic cement. (Photo 11)
17. This decoder is designed for use with 1.5V
lamps without the need for additional resistors.
Attach the wires for the lights to the decoder.
The headlight and backup light wires attach to
the two center tabs on each end of the decoder
(2, 3, 10, and 11).
18. Attach one wire from one ditch light to FX5 (14)
and one wire from the other to FX6 (16). Attach
the remaining wires to the corresponding
common tabs (13 and 15).
19. Replace the shell and reinstall the coupler
boxes removed in Step 1. Be sure not to get the
wires pinched between the shell and the motor
or driveline. Tape them up inside the shell if
necessary.
20 . Take the decoder for a test spin, by placing it on
a DCC-equipped track and selecting address 3,
and running it to ensure that it is functioning
properly and the lights are operating.
Note: The decoder is not defaulted to operate
in analog (DC).
Photo 10

Baffle Dimensions:
14mm 14mm 14mm 14mm 18mm
®
New Dimensions in Digital Sound Technology
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All Rights Reserved
141 Burnett Drive • Durango, CO 81301
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Email: supp[email protected] • Website: www.soundtraxx.com
Front
Right Pickup
Front
Left Pickup
Rear
Right Pickup
Rear
Left Pickup
Headlight Backup Light
FX6 1.5V FX5 1.5V
5 6 7 8
Speaker +
Speaker -
Motor
Motor -
Motor +
TSU_GN1000_INSTALL_1.EPS
1 2 3 4
9
10 11 12
F5 F6S+
S- M- M+
16 15 14 13
TSU-GN1000 Wiring Diagram:
16mm
37mm 37mm
Factory Decoder Diagram:
Front
Right Pickup
Front
Left Pickup
Headlight
Rear
Right Pickup
Rear
Left Pickup
Backup Light
Motor
Motor -
Motor +
FX6 1.5V FX5 1.5V