Operating instructions
4
RailKing 4-Car Subway Set Operating Manual
RAILKING
PROTOSOUNDS® OPERATING
INSTRUCTIONS
The MTH ProtoSound® digital sound and train control system provides
the operator with unprecedented realistic operation on your model railroad.
In addition to actual Subway Set car CD-equivalent 16-bit digital sounds,
you get the following features:
Built-In DCRU Reverse Unit * Authentic Horn Sound * Authentic Bell Sound *
Squeaking Brake Sound * Subway Announcement Sounds * Self-Recharging
Battery Back-Up System With Automatic Battery Shut-Off * Remotely
Controlled Reverse Unit Lock-Out * Remotely Adjustable Engine Volume *
Each feature is described among the following pages. Though the system
is easy to use, we encourage you to read the instructions thoroughly.
PROTOSOUND® DCRU® REVERSE UNIT
As mentioned in the Basic Operating section, the car is controlled by a
ProtoSound® DCRU® reverse unit that contains the standard forward-
neutral-reverse states found on most reverse units. However, as described
earlier, when power is first applied to the track, the reverse unit begins in
RESET or what seems like a neutral state. Power must be interrupted again
to get the car to enter the forward state. It is this first RESET state that
gives ProtoSound® its unique, remote controlled functions. The system
will enter RESET whenever power to the track is off for three or more
seconds. NEUTRAL will be referred to as the state between Forward and
Reverse.
ProtoSounds® is equipped with a microprocessor, that, depending on the
amount of memory it is allotted, allows the user to utilize several remotely
activated functions. In the simplest terms, ProtoSounds® has its own
“Computer" controlling these functions. In fact, the power of this
microprocessor is the same as that of a 286 desktop computer! In order to
access many of these remotely controlled functions, the user must be in the
RESET state to do so. RESET is entered anytime power to the locomotive
has been off for more than 3 to 5 seconds. When the car first enters
RESET, the microprocessor initiates a system check to determine if the
system, transformer and car are operating correctly. This takes
approximately 2.2 seconds. In order for ProtoSounds® to properly initiate
the system check, do not advance the transformer throttle past 10 volts
when you first enter RESET, then slowly turn the transformer throttle to the