SoundTraxx Tsunami TSU-AT1000 Application Note Download Page 3

9.  Unclip the retainer holding the worm gear to 

the top of one of the gear towers by spreading 
out the sides and lifting them free. Pull out the 
driveline from the fl ywheel.  (Photos 11 and 12)

10.  Lift out the motor and the other driveline will 

fall out from the fl ywheel.  (Photo 13) 

11.  Note that the bottom of the motor is an 

uninsulated clip, which is separated from the 
frame by a small air gap.  If this gap is bridged, 
the decoder could be damaged.  To ensure 
that this will not happen, place a small strip of 
electrical insulative tape along the bottom of 
the frame as shown.  This will guarantee the 
motor is fully insulated from the frame. 
(Photo 14)

6.  Once the clip has been removed, solder a 

3” piece of 30-32 gauge wire to the top of the 
clip so that it extends over the long end.  After 
soldering the wire on, wrap the connection 
with insulative tape to protect the connection.  
Be sure the area where the spring contacts the 
clip is not covered with tape, or the motor will 
not function.  (Photo 8) 

7.  Once done, remount the clip to the motor. 

(Photo 9) 

8.  Steps 8 through 10 are recommended to 

ensure the reliable operation of the decoder.  
Remove the motor by removing the four screws 
under the body that hold the motor mounts to 
the frame.  (Photo 10) 

Photo 8

Photo 9

Photo 10

Photo 13

Photo 11

Photo 12

Photo 14

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