MTHTrains RailKing NW-2 User manual

RAILKING NW-2 DIESEL ENGINE
OPERATING INSTRUCTIONS
Thank you for purchasing the RailKing® production of General Motors’
NW-2 diesel engine. The engine’s durable ABS body and die-cast trucks
are traditionally sized for operation on most O-27 Gauge track. The engine
should operate for years with most compatible AC transformers (see the
chart on page 31 for a list of compatible transformers) and is completely
compatible with most 3-rail locomotives, rolling stock and accessories.
The locomotive is equipped with either an electronic horn or the Proto
sound® Digital Sound and train control system which contains several
deluxe features that are simple and fun to operate. Each feature is described
among the following pages which should be read before the engine is
operated. For those of you who can’t wait to get started, theQuick Start
BasicOperatingInstructions found on Pages 3 and 4 should be read so that
you understand the basics of the operating system. Please note that some
features are only found in the Proto sound® models and are marked as such.
Features not marked as Proto sound® features are available in all models.

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RailKing NW-2 Operating Manual
Table Of Contents
QUICK START - BASIC OPERATION 3
PROTOSOUNDS®OPERATINGINSTRUCTIONS 4
Proto sound® ECRU® Reverse Unit Operation(All 3-Rail Models) 5
Horn Operation 5
Bell Operation 5
ProtoCoupler™ Operation 6
Squeaking Brake Sounds 7
Tips On Using Squeaking Brakes 8
Freight Yard Sounds (FYS) 9
Tips On Using The Freight Yard Sounds 14
Self-Charging Battery Backup System 15
Replacing The Battery 15
Proto sound® Volume Adjustment 16
OPERATING AND PROGRAMMING PROTO-SOUND® FEATURES 17
Entering RESET Options 18
Setting The Engine Volume 19
Programming For Squeaking Brake Operation 19
Programming For Horn In Neutral Operation 20
Programming For ProtoCoupler™ Operation 20
Programming For FYS Operation 21
Resetting All Proto sound® Options To Factory Defaults 22
Programming For Cab Chatter Sounds 22
OIL & LUBRICATION INSTRUCTIONS 23
TRACTION TIRE REPLACEMENT INSTRUCTIONS 24
LIGHT BULB REMOVAL & REPLACEMENT 25
TROUBLE SHOOTING PROTOSOUND™PROBLEMS 26
Proto sound® RESET Feature Chart 30
Transformer Wiring Chart 31
EXPLODED VIEWS AND PARTS LIST 32
O-27 OPERATION 34
SERVICE AND WARRANTY INFORMATION 36
HOW TO GET SERVICE 36
LIMITED ONE YEAR WARRANTY 36

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RailKing NW-2 Operating Manual
QUICK START - BASIC OPERATION
The RailKing NW-2 contains state-of-the art electronics with several
built-in automatic features for incredibly realistic operation. Despite these
advanced features, the NW-2 is easy to operate with any compatible
standard AC transformer (see the compatibility chart on page 31).
All models are controlled by a Proto sound® ECRU® electronic reverse
unit. The reverse unit operates in the same manner that all reverse units
function by using forward, neutral and reverse states that are entered each
time the throttle is turned on and off or by using the transformer direction
switch (if so equipped).
The reverse unit is designed to
ignore dirty track, dead spots on
switches or minor short circuits
without disrupting the engine
operation, even at slow, prototypical
speeds. Once the engine is placed
on the track, the throttle on the
transformer can be advanced. You
will see that only the engine’s lights
come on and that only two dings of
the Proto sound® bell occur
followed by the diesel start-up
sounds (on Proto sound® equipped 3-rail models). The engine does not
run. This is known as the RESET
state and is explained in more
detail beginning on Page 4. The
Proto sound® ECRU® will not
power the motors until the throttle
is turned OFF and then ON again.
At this point, the engine will now
function just like any other
electronic or mechanical E-unit. On Proto sound® equipped engines, the
diesel engine sounds will change in volume as the engine begins to move.
The horn can be activated by pressing the whistle button on the transformer
just as any horn would be activated. See the sections later in this guide,
beginning on page 5, for more information on activating the horn and bell
sounds.
DCRU® Electronic Reverse Unit
Lockout Switch
Figure 1: Proto sound® ECRU® Lockout Switch
RESET
Neutral
Reverse
Neutral
Forward
Figure 2: ECRU™ Cycle Phases

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RailKing NW-2 Operating Manual
PROTO SOUNDS® OPERATING
INSTRUCTIONS
The MTH Proto sound® digital sound and train control system provides
the operator with unprecedented realistic operation on your model railroad.
In addition to actual diesel engine, CD-equivalent 16-bit digital sounds,
you get the following features:
1. ∗Built-In Proto-sound® DCRU® Reverse Unit * Authentic Diesel Engine Horn
Sound * Authentic Diesel Engine Bell Sound * Squeaking Brake Sound * Freight
Yard Sounds * Operating Remote Controlled ProtoCoupler™ *
Self-Recharging Battery Back-Up System With Automatic Battery Shut-Off *
Remotely Controlled Reverse Unit Lock-Out * Remotely Adjustable Diesel
Engine Volume * Authentic Diesel Engine Start Up & Shut Down Sounds *
Random Selection of Four “Cab Chatter" Radio Transmission Sound Clips *
Each feature is described among the following pages. Though the system
is easy to use, we encourage you to read the instructions thoroughly.
Proto sound® DCRU® REVERSE UNIT
As mentioned in the Basic Operating section, the engine is controlled by a
Proto sound® 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 locomotive 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 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 engine first enters RESET, the
microprocessor initiates a system check to determine if the system,

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RailKing NW-2 Operating Manual
transformer and engine are operating correctly. This takes approximately 5
seconds during which you will hear the engine’s startup sounds begin. In
order for ProtoSounds® to properly initiate the system check, do not
advance the transformer throttle past 10 volts when you first enter RESET,
wait for the diesel startup sounds to begin and then slowly turn the
transformer throttle to the off position and then back on again to enter the
forward phase. Interrupting the power too quickly may cause the system to
re-enter RESET (signaled by two dings of the bell). Should this happen,
wait longer before interrupting the power to enter the Forward phase.
ProtoSounds® comes with several programmable functions, including
Engine Volume Adjustment, Separate Bell Button Operation
(pre-programmed at the factory), Cab Chatter On/Off Control, ProtoCoupler
On/Off Control and Horn-In-Neutral Operation. Each of these features are
described in more detail later. You will notice that when in RESET, your
engine will not respond to the whistle button with a horn blast or continuous
bell ringing. In fact, when in RESET and the whistle button is depressed,
only one single bell chime will be heard each time the whistle button is
pressed. If you don’t want to configure or change your locomotive using
any of these programmable features, simply leave RESET and wait 5
seconds before interrupting the power to put the engine in forward. After
you leave RESET, your engine will operate normally in all the direction
states of forward, neutral and reverse.
HORN OPERATION
Your RailKing NW-2 ProtoSound® equipped engine is equipped with a
digital recording of a diesel horn. The horn sound can be activated anytime
the engine is in forward or reverse by pressing the whistle button on your
transformer. The horn will continue to blow as long as the whistle button is
depressed. The horn will not function in RESET and must be configured
through a RESET option to allow the horn to work when the engine is in
neutral. See page 17 for information on horn programming in the Using
RESET To Program ProtoSounds® section of this manual.
BELL OPERATION
Your RailKing NW-2 ProtoSound® equipped engine is equipped with a
digital recording of an actual diesel bell. Unlike previous versions of
ProtoSounds®, the bell can be turned on or off with any separate bell
button, like the Lionel® Railsounds® No. 5906 Bell Button, by simply

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RailKing NW-2 Operating Manual
pushing the button. If you don’t have a separate bell button, the bell can be
controlled through your transformer’s whistle button whenever the engine
is in NEUTRAL. The bell will never ring continuously in RESET
(Remember NEUTRAL is the state between Forward and Reverse). Once
the bell is turned on, it will continue to ring when the engine is cycled into
forward or reverse until you press the bell button or re-enter NEUTRAL
and turn the bell off with the whistle button.
To turn the bell on using the transformer’s whistle button, turn on power to
the track and cycle the engine into NEUTRAL. Turn the throttle to 8 volts
or less (any higher voltage will arm the ProtoCoupler™) and press the
whistle button. The bell should begin chiming. To turn the bell off, press
the whistle button again. If you want to keep the bell on while running the
engine, simply interrupt the power with the transformer throttle or the
transformer directional switch and enter forward or reverse.
PROTO-COUPLER™ OPERATION
Your RailKing NW-2 ProtoSound® equipped locomotive has two
coil-wound ProtoCouplers™ for remote uncoupling action. The couplers
are mounted on the power trucks. Because the ProtoCoupler™ is controlled
through ProtoSounds® microprocessor, it doesn’t require an uncoupling
track section or modification to your layout to function. The three simple
steps below are required to operate the coupler.
1. Put your engine in NEUTRAL and turn the throttle all the
way up.
2. Press the transformer whistle button to “Arm" the coupler.
(You will hear a “Clank")
3. After arming the coupler, press the whistle button again to
open the coupler.
HH
Put Engine In Neutral
At Full Power
Press & Release
The Whistle Button Press & Release
The Whistle Button
Listen For The
Ca-ClunkSound
See The Coupler Open
And Listen For The
Cha-Chusshh Sound

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RailKing NW-2 Operating Manual
When the knuckle fires open you will hear the buzzing of the coil
energizing and the sound of the air lines coming apart. It can best be
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. 3.
For multiple heading purposes, only one of the two ProtoCouplers™ will
function at any one time. Use the coupler direction switch as shown in Fig.
5 on page 16 to select either the front or rear coupler. Simply slide the
switch toward the direction of the coupler you want to make active.
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 Freight Yard 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 each
Lubricate Coupler Rivet
Figure 3: Lubricating The ProtoCouplers
Throttle Down From
High Voltage To Low
Listen For The
Squeaking Brake Sounds

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RailKing NW-2 Operating Manual
time the voltage is reduced from high to low. Some practice may be
required to synchronize the playing of the brake sounds with the movement
of the engine. It is not uncommon for the engine to stop before the brake
sound is completed. Operators will find that by coordinating the movement
of the throttle setting from 8 volts to off will allow the engine to maintain its
movement while the brake sounds play. Note: The brake sounds will not
be heard if the transformer throttle is not set above 14 volts and/or not
reduced below 8 volts.
TIPS ON USING THE SQUEAKING BRAKE FEATURE
Users will find the squeaking brake feature to be a very realistic way to
simulate the sound of an engine slowing down for curves, crossings or coming
to a stop at a station, side track or switch yard. However, you may find that
your engine continues to play the brake sounds once your engine comes to a
stop, or that the sounds stop before the engine comes to a complete halt. For
example, if you simply run the engine and turn the throttle off quickly, the
brake sounds will likely continue playing even though the engine has come to a
complete stop.
This annoying effect can be eliminated by simply practicing with the brake
feature. In no time, you will quickly learn how to “feather" the throttle to keep
the engine moving while the brake sounds play and then turning the throttle off
just as the sounds stop.

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RailKing NW-2 Operating Manual
Operating Proto-Sound Freight Yard Sound
Effects
Freight Yard Sounds (FYS)
Proto-Sound® is equipped with operator controlled Freight Yard Sounds,
referred to as FYS. The FYS sequence is designed to simulate the arrival,
unloading, loading and departure of a freight train in a freight yard. This
easy-to-use feature allows you to play digitally recorded sounds of freight
yard operations while your engine is parked in the Neutral State. No
additional wires or modifications are needed to enjoy these amazing sound
effects. The sounds themselves are randomly “shuffled” by the
Proto-Sound® computer. This gives the system the ability to play the
various sounds in a different order each time FYS is enabled.
Quick Overview- FYS Sounds
The following is a quick over view on how you can operate FYS.
The train on track moving Forward or Reverse direction.
BPress and Hold Bell Button For 3+
Seconds, Listen For a Horn Blast or
Air Release, then Remove your Finger
from the Button.
BPress Bell Button Again Quickly to
Stop Bell Chime.
Your train is now ready for you to play the FYS.

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RailKing NW-2 Operating Manual
d
Bell
Horn
Whistle
Direction
OR
To Play FYS, Stop Train Direction.
This Can Be Done by Pressing the
DIRECTION Button or Cycling the
TransformerHandle.
At This Time the Train Will Stop in
Neutral.
In a Few Seconds, A Man Whistling
Plays, Followed by a Background
Noise.
STOP
d
Bell
Horn
Whistle
Direction
OR Change/Press Direction- The Train Will
Remain In Neutral. It Will Continue to
Play More Background Noises.
d
Bell
Horn
Whistle
Direction
OR
Change/Press Direction- The Train Will Remain
In Neutral. You Will Hear a Double Air Release,
A Man Whistling Plays, More Background
Noises.
d
Bell
Horn
Whistle
Direction
OR
GO
Change/Press Direction- The Train Will Remain In
Neutral. You Will Hear Closing Doors, Horn Blast,
a Few Bell Chimes and Engine Departs in the
Direction the Engine First Stopped.
For more detailed FYS instructions, read the following.

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RailKing NW-2 Operating Manual
Activating Freight Yard Sounds (FYS) - Detailed Instructions
Arming The Freight Yard Sounds Feature
Before the Passenger
Station sounds can be
heard, the feature must
be activated. The
feature can be activated
in one of two ways
Option 1:If you are using the Z-750™ transformer, or any transformer
with a separate bell button controller, you can activate the feature by simply
pressing and holding the bell button for at least three seconds (it does not
matter if you are in
forward, neutral or reverse).
You will hear the bell turn
on and, after three seconds,
you should hear a short
whistle blast or air release.
Once the whistle blast or air
release is heard, the bell
button can be released. The bell will continue to chime, so if you want to
turn off the bell ringing, simply press and release the bell button. If you
were in neutral, interrupt the transformer throttle to enter the next
directional state (either forward or reverse). (Note: the FYS will only play
in the first Neutral after it is armed. You cannot interrupt the power twice
to enter another direction and still have the FYS active.) You can now
trigger the sounds to begin playing when you next enter Neutral.
Option 2: If you do not have a separate bell button available, you can
activate the FYS using your transformer’s whistle button control. To arm
the FYS, turn on the transformer throttle and cycle your engine into Neutral
(not RESET). Once in neutral, set the transformer throttle to 8 volts or less
and press and hold the whistle button for at least three seconds. You will
hear the bell turn on and, after three seconds, you should hear a short
whistle blast. Once the whistle blast or air release is heard, the whistle
button can be released. The bell will continue to chime, so it you want to
turn off the bell ringing, simply press and release the whistle button.
Interrupt the transformer throttle to enter the next directional state (either
forward or reverse). (Note: the FYS will only play in the first Neutral after
Put Engine In Neutral,
Forward or Reverse
Press & Hold
The Railsounds® Bell Button
For 3 Seconds
Listen For The
Start Of The Bell Sound
Listen For The
Air Release Sound
After 3 Seconds
Put Engine In Neutral
At Low Power
Press & Hold
The Whistle Button
For 3 Seconds
Listen For The
Start Of The Bell Sound
Listen For The
Air Release Sound
After 3 Seconds
H

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RailKing NW-2 Operating Manual
it is armed. You cannot interrupt the power twice to enter another
direction and still have the FYS active.) You can now trigger the sounds to
begin playing when you next enter Neutral.
Triggering Freight Yard Sounds
Once the FYS feature has been activated, it will be played the next time the
engine enters neutral. At this point, Proto-Sound® will take over control of
your engine, disabling the bell and whistle button. In addition,
Proto-Sound® reconfigures the
way the reverse unit functions
during the operation of the FYS
feature. This forces the engine
to leave your freight yard in the
same direction as it arrived. The
following operator controlled
“Events” control the FYS’s
actions and sounds. (Note: The direction states shown assume the FYS is
entered from forward. If entering the freight yard in reverse, the
direction states shown will be reversed.)
Event 1: Interrupt the transformer throttle to cycle the engine from forward
into neutral. If the throttle was at 14 volts or higher, the squeaking brakes
sound will play. Once the engine is stopped, the throttle must be turned on
to keep it in the neutral state. Note: Failure to turn the throttle back on
within 3 seconds of leaving forward will disable FYS and shutdown
Proto-Sound®. The next time power is turned on, the engine will be in
the RESET position. See page 18 for additional information on RESET.
If the bell was not turned off after arming
FYS, it is now turned off automatically.
After entering neutral, Proto-Sound will
immediately play a horn blast or an air
release sound, followed approximately 2
seconds later by a man whistling and a
freight car door sliding open. At this point,
various freight yard sounds can be heard,
including loading and unloading
operations, engine sounds, yardman
“slang,” and additional freight car door sounds.
Put Engine In Neutral
At Low Power Listen For Air Release Sound
And Cab Chatter Message
Listen For Engine
Rumbling Sound
Interrupt Throttle To
Enter The Next Phase

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RailKing NW-2 Operating Manual
Event 2: Interrupt the transformer throttle
again to cycle the engine from neutral into
reverse. In order to have the engine leave the
yard in the same direction it entered
Proto-Sound® disables the motors in this
reverse state to prevent the engine from
running backwards. FYS confirms reverse is
entered by playing a sound highlight best
described as a rumbling sound. You may
have to go through the entire FYS sequence
several times before you clearly identify this sound. After the rumbling
highlight is played, the freight yard sounds heard in Event 1 will continue to
play.
Event 3: Interrupt the transformer throttle again to cycle the engine from
reverse back to neutral. FYS confirms that the engine is now in neutral by
sounding two quick air releases. This is followed approximately two
seconds later by a man whistling and continued freight yard loading and
unloading sounds.
Event 4: Interrupt the transformer throttle again to complete the FYS
feature and cycle the engine into forward. FYS confirms it has entered
forward by playing the sound of the freight car door closing. Within two
seconds, the whistle will sound two short blasts (three if entering reverse),
and the bell will begin to chime. After a few chimes of the bell, the engine
will begin moving in forward with the bell continuing to ring. A few
seconds later, the bell will turn off, and the
engine will resume normal operation.
Note: When entering Event 4, it is
important to set the transformer throttle at
a high enough setting that the engine will
begin to move when the motors are
activated. However, the throttle should
not be too high for the engine to maintain
a safe operating speed.
Listen For 2
Air Release Sounds
Interrupt Throttle To
Enter The Next Phase
Listen For The Sound
Of Box Door Closing
Interrupt Throttle To
Enter The Next Phase

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RailKing NW-2 Operating Manual
TIPS ON USING FYS FEATURES
FYS is a unique feature of Proto-Sound® that is completely controlled by the
operator. You decide how, when or if you want to utilize the feature. By
reviewing the following tips, you should find solutions or suggestions to the
various operating scenarios you might encounter when using FYS.
Tip#1: You can escape the FYS sequence by interrupting the transformer
throttle before the man’s whistle plays in Stage 1 (neutral).
Tip#2: You can exit FYS at anytime by turning the transformer throttle Off
for 15 seconds.
Tip#3: You do not have to be in Forward to utilize FYS. For example, if you
activate the FYS feature while in Reverse your train to leave the station/yard in
the same reverse direction that it arrived in.
Tip#4: You can use FYS even if you are double-heading with another engine
regardless of whether the second engine is equipped with an FYS programmed
Proto-Sound® module. If the second engine isn’t equipped with FYS, the only
thing to remember is not to turn up the transformer throttle very high when
entering Reverse in Stage 2. If the throttle is set too high, then the second
locomotive will begin vibrating on the track as its motors will be turning in
reverse. If your second engine is equipped with FYS, you may want to disable
the FYS when used in double-headed operations. To disable FYS, see the
section on programming RESET functions on page 18 of this manual.
Tip#5: You can leave any of the event stages at any time by simply
interrupting the transformer throttle. Any sound effects programmed to play in
that event will simply not occur. The only exceptions are Event 1 and Event 4.
In Event 1, interrupting the throttle has no effect on FYS until after the man’s
whistle has completed and the freight car doors have opened. In Event 4, you
cannot interrupt FYS until after the engine begins to move. Interrupting the
throttle before the engine begins to move has no effect on the locomotive’s
operation.

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RailKing NW-2 Operating Manual
SELF-CHARGING BATTERY BACKUP SYSTEM
Proto-Sound® includes a self-charging battery backup system for
improved performance at any speed. The battery ensures that power to the
sound system will remain on during directional changes, while setting
RESET options or when traveling over spots of dirty track and switches.
The self-recharging battery backup system is automatically turned on or off.
There no switches needed to enjoy the benefits of the automatic battery
backup system.
Proto-Sound® contains a warning alarm if the battery backup system fails
to automatically disengage when track power is turned off. Should the
backup system fail, you will hear a repeating whistle blast indicating that
this has occurred. Should this happen, unplug the battery from the
Proto-Sound® module (to prevent the battery from being run down) and
contact MTH for instructions on returning the train for repair.
REPLACING THE PROTOSOUND® BATTERY
The Proto-Sound® battery (located in the tender body), is a special NiCad
7-cell, 8.4v battery -NOT the 6-cell, 7.2v battery found in most convenience
stores. The battery is continually charged from the track when power is
applied above 11 volts. Should last for up to five years. In addition, the
NiCad battery is a dry battery and should not leak or cause any damage to
your locomotive during its lifetime. The 6-cell NiCad is NOT
recommended for use with Proto-Sound® applications.
If you notice that the sounds seem distorted or garbled at low voltages or
become immediately silent when power from the transformer is shut off, the
battery may be failing. Before replacing the battery, you should put the
engine in NEUTRAL and leave the transformer throttle set at about 12 volts
for 15 minutes. This should temporarily recharge the battery. If the garbled
or distorted sounds are reduced, then your battery charge has worn down.
You can give your battery a full charge by leaving the engine ON in the
NEUTRAL position for 6 hours.
Note: When charging the battery in neutral, if your trains contains a
Smoke Unit should be turned OFF to prevent damage to the wick and the
heating elements.
If you need to replace the battery, they are available from MTH
Proto-Sound® Electronics at 7020 Columbia Gateway Drive, Columbia,
MD 21046-1532. A standard 9v alkaline battery can be substituted as a
temporary fix, but, since alkaline batteries can’t take a charge, it will
eventually wear down.

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RailKing NW-2 Operating Manual
PROTOSOUND® VOLUME ADJUSTMENT
Your Proto-Sound® system has two types of volume adjustment. A
manual turn knob on the bottom of the chassis (See Fig. 13 below) allows
you to control all the sounds in the system and a remote control “RESET"
option (Option # 6) allows you to control the volume level of the engine
chuff sounds remotely from the transformer. Turning the volume
adjustment knob one direction will increase the volume. Turning it the
opposite direction will lower the volume of all sounds: bell, whistle, and
enhanced neutral sounds. For information on operating the RESET volume
adjustment option, see the section entitled “Programming Proto-Sound®
RESET Options” on the following pages.
Proto-Sound®
Volume Control
Figure 4: Adjusting The ProtoSound Volume and selecting the
ProtoCoupler™
ProtoCoupler™
Selection Switch
Figure 5: Proto-Coupler Selection Switch

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RailKing NW-2 Operating Manual
Operating & Programming Proto-Sound®
Programmable Features
As mentioned in the Basic Operating section, the engine is controlled by an
electronic DCRU® reverse unit that contains the standard
forward-neutral-reverse states found on most reverse units. However, when
power is first applied to the track, the reverse unit begins in RESET, similar
to a neutral state. Power must be interrupted again to get the locomotive to
enter the forward state. It is this first RESET state that gives Proto-Sound®
its unique, remote controlled functions.
Proto-Sound® is equipped with a microprocessor that allows the user to
utilize several remotely activated functions. In the simplest terms,
Proto-Sound® has its own “Computer" controlling these functions.
In order to access many of these remotely controlled functions, the unit
must be in the RESET state. RESET is entered anytime power to the
locomotive has been off for more than 3 seconds. When the engine first
enters RESET, the microprocessor initiates a system check to determine if
the system, transformer and engine are operating correctly. This takes
approximately 5 seconds during which you will hear the engine’s startup
sounds begin. In order for Proto-Sound® to properly initiate the system
check, do not advance the transformer throttle past 10 volts when you first
enter RESET, wait for the startup sounds to play, then slowly turn the
transformer throttle to the off position and back on again to enter forward.
Interrupting the power too quickly may cause the system to re-enter RESET
(signaled by two dings of the bell). Should this happen, wait longer before
interrupting the power to enter the forward phase.
Proto-Sound® comes with several programmable functions, including
remote Steam Chuff Volume Adjustment, Whistle In Neutral Operation,
ProtoCoupler® On/Off Control, Squeaking Brakes and Freight Yard Sound
Proto-Effects™. Each of these features is described in more detail in the
following sections. When in RESET, your engine will not respond as
normal to the horn/whistle or bell button. In fact, when in RESET only one
single bell chime will be heard each time the horn/whistle button is
pressed. If you don’t want to change your locomotives settings using any of
the programmable features, simply leave RESET (waiting 5 seconds before
interrupting the power) and put the engine into forward. Remember though,
that once power is turned off for more than 3 seconds, the next time power
is applied to the track, your engine will be back in RESET.

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RailKing NW-2 Operating Manual
USING RESET TO PROGRAM PROTO-SOUND®
Proto-Sound® is equipped with several programmable features which are
accessed in the RESET state by moving the transformer throttle up and
down between full voltage and low voltage (8 volts) without shutting the
transformer off completely. Each time this is done you advance, one
feature at a time, through the available options. An air-release sound is
heard each time the throttle is advanced and returned. In addition, there are
special sounds to tell you what RESET position you are in.
For example, if you want to select Feature 2, put the engine in RESET, and
move the throttle up and down from full throttle to low two times. After the
second advance, you will hear two “clinks" indicating that the computer is
now in Feature 2. Advance the throttle again and you will hear three
“clinks" for Feature 3. Advance it two more times and you will hear a
“clank" indicating that you are now in Feature 5. Advance the throttle two
more times and you will hear a “clank" and two “clinks" indicating Feature
7. ((5 throttle advancements = 1 clank) + (2 throttle advancements = 2
clinks)). “Clank” + “Clink" + “Clink" = Feature 7. You can advance the
throttle as quickly as you like and the computer will still remember the
number of times the throttle is advanced by playing back the number of
“Clinks" and “Clanks" to confirm the feature you’ve selected.
In RESET Mode
Move The Throttle
Up & Down From
High Voltage To Low
2 Times
Advance The Throttle
Up & Down From
High Voltage To Low
4 More Times
Listen For The
2 Clink Sounds
Listen For 1 Clank
And 1 Clink Sounds

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RailKing NW-2 Operating Manual
Remotely Adjusting The Engine Volume - Reset Feature 6 – (1
Clank, 1 Clink)
Reset Feature 6 allows you to change the volume setting of the chuff sounds
without affecting the volume of other sounds, such as whistle, bell,
enhanced neutral sounds, etc. To use, cycle to Reset 6 and press the
Whistle button. A single bell will play, and the chuff will begin at the
current volume. Each time the Whistle button is pressed, a bell will sound
and the volume setting will cycle down to the next level. The levels
available are 100%, 50%, 25%, and 0%. After 0%, pressing the whistle
button again will return
the chuff to 100%.
When the desired level
is reached, lock the
changes by interrupting
the throttle and cycling
the engine into forward
Programming For Squeaking Brake Operation- Reset
Feature 45 –(9 Clanks, 0 Clinks)
Reset Feature 45 allows you to determine if and how the Squeaking Brakes
recording will be activated. To use, cycle to Reset 45 and press the Whistle
button. The engine will play a series of bells. This indicates the current
setting. Each time the Whistle is pressed, Proto-Sound® will cycle to the
next available setting and provide the appropriate bell indicator. The
settings for Reset 45 are 1 Bell = On Demand (Enabled when FYS is
activated), 2 Bells =
Always On, 3 Bells = Off.
When the desired setting
is reached, lock the
changes by interrupting
the throttle and cycling
the engine into forward.
In RESET Mode
Move The Throttle
Up & Down From
High Voltage To Low
6 Times
Listen For 1 Clank
And1ClinkSounds
PushTheWhistleButton
Until You Reach The
Setting You Desire
Interrupt The Throttle
To “Lock-In”
The Volume Setting
H
In RESET Mode
Move The Throttle
Up & Down From
High Voltage To Low
45 Times
Listen For 9 Clank
And 0 Clink Sounds
Push The Whistle Button
Until You Hear The
Appropriate # Of Dings
Interrupt The Throttle
To “Lock-In”
The Brake Setting
H

20
RailKing NW-2 Operating Manual
Programming For Horn In Neutral Operation-Reset Feature 25
-(5 Clanks)
Reset Feature 25 allows you to operate the Horn while the engine is in the
Neutral state. When ON, pressing the Horn/Whistle button while in
Neutral, with 10V AC or less on the track, will cause the Horn recording to
sound. To use, cycle to Reset 25 and press the Horn/Whistle button. The
engine will play a series of bells. This indicates the current setting. Each
time the Horn/Whistle button is pressed, Proto-Sound® will cycle to the
next available setting and
provide the appropriate bell
indicator. The settings for
Reset 25 are 1 Bell = OFF, 2
Bells = ON. When the
desired setting is reached,
lock the changes by
interrupting the throttle and
cycling the engine into
forward.
Programming For Proto-Coupler® Operation -Reset Feature
10-(2 Clanks)
Reset 10 allows you to turn
the operation of the
Proto-Coupler® on or off.
When OFF, the coupler will
not arm or fire from Neutral.
To use, cycle to Reset 10
and press the Whistle
button. The engine will
play a series of bells. This
indicates the current setting.
Each time the Whistle
button is pressed, Proto-Sound® will cycle to the next available setting and
provide the appropriate bell indicator. The settings for Reset 10 are 1 Bell =
ON, 2 Bells = OFF. When the desired setting is reached, lock the changes
by interrupting the throttle and cycling the engine into forward.
In RESET Mode
Move The Throttle
Up & Down From
High Voltage To Low
25Times
Listen For 5 Clank
And 0 Clink Sounds
Push The Whistle Button
Until You Hear
2 Bell Dings
Interrupt The Throttle
To “Lock-In”
The Horn Setting
H
In RESET Mode
Move The Throttle
Up & Down From
High Voltage To Low
10 Times
Listen For 2 Clank
And 0 Clink Sounds
Push The Whistle Button
Until You Hear
2 Bell Dings
Interrupt The Throttle
To “Lock-In”
The Coupler Setting
H