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described as a CHA-CHUSHHH sound. The coupler doesn't have to be
fired in NEUTRAL. Once the coupler is armed it can be fired in Forward,
Neutral or Reverse. However, you may find that the coupler doesn't open
when firing the coupler at high
speeds. Reduce the voltage
setting on your transformer if
this occurs and run your engine
at a slower speed before firing
the coupler. If the coupler
continues to open erratically, try
lubricating the knuckle with
light oil as indicated in Fig. 5.
ENHANCED
NEUTRAL STEAM SOUNDS
The enhanced Neutral Sounds can be automatically heard whenever the
engine is in neutral. The sounds, which include Steam Pop-Off, Steam
Blow-Down, and Steam Injector sounds occur every 2 to 30 seconds. Each
of the three sequences will play at random intervals to eliminate repetitive
and boring sequences. While the sounds are selected to play randomly by
the microprocessor, there is no guarantee that you won't hear the same
message repeated twice or more times.
SQUEAKING BRAKE SOUNDS
ProtoSound equipped engines feature the ability to play the sound of
squeaking brakes whenever your engine slows in speed. There are two
settings for activating the squeaking brake sounds. The default setting
allows the brake sounds to play while the engine is in forward or reverse
and the transformer throttle is lowered from a high setting to a low setting
(14 volts to 8 volts or less). The second setting requires that a bell button be
used to "arm" the brake feature and is explained in more detail in the
"Activating Passenger Sounds"
section found later in this
manual. The sound itself is a
stored record on the ProtoSounds
software chip and will always
play the same brake sound for
the same three second length
MTH Blue Comet Operating Manual
Lubricate
Coupler
Knuckle
Figure 5: Lubricating The ProtoCoupler
Throttle Down From
High Voltage To Low
8
Listen For The
Squeaking Brake Sounds
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