SoundTraxx Kato HO P42 Installation and operating instructions

Kato P42
Tsunami Digital Sound Decoder Installation Notes
Overview
This application note describes the procedure for
installing a TSU-KT1000 Digital Sound Decoder into a
Kato HO P42 locomotive.
Skill Level 2:This installation can be completed in 1
to 2 hours with minimal modification required to the
model.
Bill of Materials
P.N. Description
828068 TSU-KT1000 for HO Kato P42
810053 Two 20.5mm Round Speakers
810109 Two 20.5mm Speaker Baffles
810118 20.5mm Speaker Gasket Kit
810037 Shrink Tube Assortment
Tools You Will Need
■ 25W Soldering Iron
■ Rosin Core Solder
■ Flux for Electrical Work
■ Wire Cutters
■ Wire Strippers
■ Hobby Knife with #11 Blade
■ Metal Straight Edge/Ruler
■ Miniature Screwdriver Set
■ Electric Drill
■ 1/8”Drill Bit
■ Small Pliers
■ Heat Gun or Blow Dryer
■ Liquid Plastic Cement (TENAX-7R™ or equivalent)
■ Double-sided Foam Tape

Installation
1. Gently spread bottom of shell and lift from
frame. (Photo 1)
2. On the factory light board, there is a screw on
each end holding the board in place. These
screws double as rail pickups. Remove both
screws and set aside, then remove the light
board.(Photos 2 and 3)
3. Remove the white plastic clip and GPS
dome from the front of the factory installed
light board and place the GPS dome in the
corresponding hole on the TSU-KT1000 P42
decoder. Set the decoder aside. Note: The
white clip situated over the GPS dome on the
factory board will not be used with the decoder,
so it can either be saved with the factory board
or discarded. (Photos 4 and 5)
4. Firmly grab the truck assemblies and pull down
to separate them from the frame. Be sure to
note which is the front and which is the rear
truck; they are labeled on the bottom with
F (front) and R (rear) and an arrow pointing in
the direction of the adjacent coupler. (Photo 6)
Photo 1
Photo 2
Photo 3
Photo 4
Photo 5
Photo 6

7. Thread one set of orange and gray motor
harness wires through each of the holes drilled
out in Step 6.The motor harnesses should be
situated so that the ends of the wires are routed
down through the holes out of the bottom of
the chassis. (Photo 10)
8. Connect the motor harness wires to the motors
as follows. First, slide a 1/8”to 1/2” piece of
heat-shrink tubing over each orange and gray
motor harness wire. Then, solder the harness
wires to the existing truck wires. For the front
truck, solder the orange motor harness wire to
the red wire and the gray motor harness wire
to the black wire. The polarity of the rear truck
is opposite that of the front truck. Thus, reverse
the procedure for the rear truck and solder
the gray harness wire to the red wire and the
orange harness wire to the black wire. Slide
the heat-shrink tubing in place over the solder
joints and heat to insulate the connections.
Reattach both trucks. (Photos 11 and 12)
5. Using pliers, gently pull free the brass strips
attached to the inside of each truck; this will
separate the motors from the rail pickups. Clip
the wires and discard the brass strips.
(Photos 7 and 8)
6. From under the chassis, there is an indentation
at each end corresponding to the inner edge
of the speaker mounting location on that end.
Using a 1/8”drill bit, drill out each indentation
to allow the motor harness wires to be routed
through. (Photo 9)
Photo 7
Photo 8
Photo 9
Photo 10
Photo 11
Photo 12

9. Assemble the speaker baffles using liquid
plastic cement to secure components. Use one
enclosure ring for the front speaker and two
for the rear speaker. Wire the speakers in series
as described in Step 10 prior to placing the
speakers in the baffles.
10. Wire the speakers in series as follows. First,
trim 6.5”from the left purple speaker wire and
thread one end of the trimmed piece through
the backside of each speaker baffle end plate.
Next, thread the wires that remain attached to
the speaker harness through the backsides of
the baffle end plates: thread the short segment
through the end plate for the front speaker
and the untrimmed segment through the end
plate for the rear speaker. Solder one end of
the trimmed 6.5”wire segment to the inner
terminal of each speaker. Finally, solder the
short harness wire to the outer terminal of
the front speaker and the untrimmed harness
wire to the outer terminal of the rear speaker.
(Figure 1)
11. Finish the speaker assemblies by pressing
the speakers up into the baffles and securing
the mounting flanges in place. Place the
finished speaker assemblies face down in
the predetermined mounting locations. If
the speaker fit seems loose, affix a gasket or
small amount of double-sided foam tape to
the edges of the mounting flanges and press
securely into place; ensure that no adhesive
is applied to or covers any part of the speaker
diaphragm.
12. Attach the TSU-KT1000 P42 decoder to the
locomotive using the screws removed from the
factory light board in Step 2. (Photo 13)
13. Plug each wire harness into the appropriate
2-pin connector. The motor harness connectors
are located in the middle of the decoder and
labeled F (front) and R (rear) for reference. The
speaker harness connector is located at the
front of the decoder and labeled SPKR.
(Photo 14)
14. Your installation is now complete! Place the
model on the mainline, select Address 3 and
test to ensure proper operation.
15. Tuck any loose wires into the space between
the decoder and the frame and replace the
shell, making sure to line the light pipes up with
the LEDs on the board.
Figure 1
Photo 13
Photo 14

TM
New Dimensions in Digital Sound Technology
Programming Notes:
Due to the unique features of the Kato P42 locomotive, the following CV optimizations have been made from the traditional
Tsunami default values.
CV 3 = 25
CV 4 = 25
CV 63 = 40
CV 209 = 40
CV 210 = 55
CV 212 = 192
CV 213 = 31
CV 214 = 12
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