Federal Signal Corporation MB1 Manual

25500112
REV. A1 0920
Printed in U.S.A.
© Copyright 2015-2020 Federal Signal Corporation
Model MB1
LED Message Board
Installation, Maintenance,
and Service Manual

blank page
Limited Warranty
This product is subject to and covered by a limited warranty,
a copy of which can be found at www.fedsig.com/SSG-Warranty.
A copy of this limited warranty can also be obtained by written
request to Federal Signal Corporation, 2645 Federal Signal Drive,
University Park, IL 60484, email to [email protected] or
call [phone].
This limited warranty is in lieu of all other warranties, express or
implied, contractual or statutory, including, but not limited to the
warranty of merchantability, warranty of tness for a particular
purpose and any warranty against failure of its essential purpose.
2645 Federal Signal Drive
University Park, Illinois 60484-3167
www.fedsig.com
Customer Support
Police/Fire-EMS: 800-264-3578 • [phone]
Work Truck: 800-824-0254 • [phone]
Technical Support 800-433-9132 • [phone]
All product names or trademarks are properties of their respective owners.

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Installation, Maintenance, and Service Manual
Federal Signal www.fedsig.com
Table of Contents
Safety Message to Installers and Service Personnel of Warning Lights .......................................... 4
Overview of the Model MB1 LED Message Board............................................................................... 6
Unpacking the LED Message Board..................................................................................................... 7
Mounting the LED Message Board ....................................................................................................... 7
Wiring the LED Message Board System in the Vehicle ...................................................................... 9
Wiring the Standalone-Mount Message Board .......................................................................................................9
Wiring the Message Board Control Head............................................................................................................... 10
Safety Message to Operators of Warning Light Equipment............................................................. 12
Operating the LED Message Board Controls..................................................................................... 13
Testing the Message Board System ................................................................................................... 13
Setting Conguration Options ............................................................................................................ 14
Entering the Standard Menu ...................................................................................................................................... 15
Entering the Security Menu ........................................................................................................................................ 15
Exiting the Standard or Security Menu.................................................................................................................... 15
Fleet Password and Security...................................................................................................................................... 15
Maintaining the Message Board.......................................................................................................... 17
Replacing the Internal 15 A Fuse................................................................................................................................17
Getting Technical Support and Service.............................................................................................. 18
Getting Repair Service ..................................................................................................................................................18
Ordering Replacement Parts............................................................................................................... 19
List of Tables
Table 1 Dimensions: Model MB1 Message Board ..............................................................................6
Table 2 Dimensions: Control Head ......................................................................................................6
Table 3 Standalone kit contents...........................................................................................................7
List of Figures
Figure 1 LED Message Board with mounting hardware .................................................................... 7
Figure 2 LED Message Board wired to control head ....................................................................... 10
Figure 3 Convergence Network connections with siren...................................................................11
Figure 4 Fuse location on PCB ......................................................................................................... 17

44 Model MB1 LED Message Board
Federal Signal www.fedsig.com
Safety Message to Installers and Service Personnel of Warning Lights
Safety Message to Installers and Service Personnel of Warning Lights
People’s lives depend on your proper installation and servicing of Federal Signal
products. It is important to read and follow all instructions shipped with this product.
Listed below are some other important safety instructions and precautions you should
follow:
Before Installation or Service
Qualifications
• To properly install or service this equipment, you must have a good understanding of
automotive mechanical and electrical procedures and systems along with proficiency
in the installation and service of safety warning equipment. Always refer to the
vehicle’s service manuals when performing equipment installations on a vehicle.
Light Hazards
• To be an eective warning device, this product produces bright light that can be
hazardous to your eyesight when viewed at a close range. Do not stare directly into
this lighting product at a close range, or permanent damage to your eyesight may
occur.
• Do not install the light system in an area that would block, impair, or blind the driver’s
vision. Ensure that the light system is mounted in a position that is outside of the
driver’s field of vision, so the driver can safely operate the vehicle.
• Federal Signal power supplies and light heads are designed to work together as
a system. Combining light heads and a power supply from dierent manufacturers
may reduce the warning eectiveness of the lighting system and may damage the
components. Verify or test your combination to ensure that the system works together
and meets federal, state, and local standards or guidelines.
Electrical Hazards
• A light system is a high current system. In order for the system to function properly,
a separate negative (–) connection and positive (+) connection must be made. All
negative connections should be connected to the negative battery terminal, and a
suitable fuse should be installed on the positive battery terminal connection as close
to the battery as possible. Ensure that all wires and fuses are rated correctly to handle
the device and system amperage requirements.
• Never attempt to install aftermarket equipment that connects to the vehicle wiring
without reviewing a vehicle wiring diagram available from the vehicle manufacturer.
Ensure that your installation will not aect vehicle operation or mandated safety
functions or circuits. Always check the vehicle for proper operation after installation.
• The lighting system components, especially light bulbs, strobe tubes, LEDs, and the
outer housing, get hot during operation. Disconnect power to the system and allow
the system to cool down before handling any components of the system.
• Do not mount a radio antenna within 18 inches (45.7 cm) of the lighting system. Placing
the antenna too close to the lighting system could cause the lighting system to
malfunction or be damaged by strong radio fields. Mounting the antenna too close to
the lighting system may also cause the radio noise emitted from the lighting system to
interfere with the reception of the radio transmitter and reduce radio reception.
• Do not attempt to wash any unsealed electrical device while it is connected to its
power source.

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Installation, Maintenance, and Service Manual
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Safety Message to Installers and Service Personnel of Warning Lights
During Installation and Service
• DO NOT get metal shavings inside the product. Metal shavings in the product can
cause the system to fail. If drilling must be done near the unit, place an ESD-approved
cover over the unit. Inspect the unit after mounting to ensure that there are no
shavings in or near the unit.
• DO NOT connect this system to the vehicle battery until ALL other electrical
connections are made, mounting of all components is complete, and you have verified
that no shorts exist. If the wiring is shorted to the vehicle body or frame, high current
conductors can cause hazardous sparks, resulting in electrical fires or flying molten
metal.
• DO NOT install equipment or route wiring (or the plug in cord) in the deployment path
of an airbag.
• Before mounting any components, check the manual to ensure that the component
you are installing is suitable for use in that area of the vehicle. Many components
are not suitable for use in the engine compartment or other extreme environmental
exposure areas.
• When drilling into a vehicle structure, ensure that both sides of the surface are clear
of anything that could be damaged. Remove all burrs from drilled holes. To prevent
electrical shorts, grommet all drilled holes through which wiring passes. Ensure that
the mounting screws do not cause electrical or mechanical damage to the vehicle.
• Refer to the manual packed with the lighting system for proper electrical connections,
additional precautions, and information.
• Locate the light system controls so the VEHICLE and CONTROLS can be operated
safely under all driving conditions.
After Installation or Service
• After installation, test the light system to ensure that it is operating properly.
• Test all vehicle functions, including horn operation, vehicle safety functions, and
vehicle light systems, to ensure proper operation. Ensure that the installation has not
aected the vehicle operation or changed any vehicle safety function or circuit.
• If a vehicle seat is temporarily removed, verify with the vehicle manufacturer if the
seat needs to be recalibrated for proper airbag deployment.
• Scratched or dull reflectors, mirrors, or lenses will reduce the eectiveness of the
lighting system. Avoid heavy pressure and use of caustic or petroleum based products
when cleaning the lighting system. Replace any optical components that may have
been scratched or crazed during system installation.
• Do not attempt to activate or deactivate the light system control while driving in a
hazardous situation.
• Frequently inspect the light system to ensure that it is operating properly and is
securely attached to the vehicle.
• After installation and testing are complete, provide a copy of these instructions to
instructional sta and all operating personnel.
• File these instructions in a safe place and refer to them when maintaining and/or
reinstalling the product.
Failure to follow all safety precautions and instructions may result in property damage,
serious injury, or death.

66 Model MB1 LED Message Board
Federal Signal www.fedsig.com
Overview of the Model MB1 LED Message Board
Overview of the Model MB1 LED Message Board
The Federal Signal LED Model MB1 Message Board is a supplemental messaging
device. The 1.9 inch by 28.6 inch display is created by 772 blue, high brightness, wide
angle LEDs. It operates at a nominal input of 13.6 Vdc (11 Vdc minimum). The functions
of the Message Board are controlled through the CAT5 serial communication cable
and a special control head. The Message Board and control head use the Federal
Signal Convergence Network and can therefore operate alongside other Federal Signal
Convergence Network products. For programming and operating instructions, refer to
Federal Signal doc. no. 25500056.
The Message Board housing is coextruded polycarbonate with polycarbonate end caps
and elastomer seals. It has 30-foot power, ground, and communication cables connected
to the Message Board through a single IP67 connector. Mounting hardware is supplied.
The Message Board has an operating temperature range of –30°C to +65°C (–22°F to
+149°F).
Table 1 Dimensions: Model MB1 Message Board
Length 35.2 inches (89.4 cm)
Height 3.0 inches (7.6 cm)
Width 3.3 inches (8.4 cm) – Message Board body
4.8 inches (12.2 cm) with standalone bracket
Net Weight 7.0 lb (3.2 kg)
Table 2 Dimensions: Control Head
Length 6.8 inches (17.3 cm)
Height 3.3 inches (7.6 cm)
Width 3.3 inches (8.3 cm)
1.6 inches (4.1 cm)
Net Weight 0.8 lb (0.4 kg)
System Shipping Weight 10.0 lb (4.5 kg)

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Unpacking the LED Message Board
Unpacking the LED Message Board
After unpacking the LED Message Board, inspect it for damage that may have occurred
in transit. If it has been damaged, do not install it. File a claim immediately with the carrier,
stating the extent of damage. Carefully check all envelopes, shipping labels, and tags
before removing or destroying them. Ensure that the parts listed in kit contents list are
included in the package. If you are missing any parts, contact Customer Support
at 1-800-264-3578, 7 a.m. to 5 p.m., Monday through Friday (CT).
Table 3 Standalone kit contents
Qty. Description Part Number
4 Bolt,Carriage,1/4-20 SS 70100531-12
2 Bolt,Carriage, 3/8-16 SS 7004A024-16
4 Nut, Keps®,1/4-20 SS 7058050
2 Nut, 3/8-16, Hi-Corr. Resistant 7059124
4 Washer, Flat, 1/4-inch, SS 7072A024
2 Washer, Flat, 3/8-inch, SS 7072A035
2 Washer, Flat, 9/16-inch, SS 7072A140
2 Lockwasher, Split, 3/8-inch, SS 7074A046
2 Bracket, Standalone Mt., Msg. Brd B 865200625
2 Screw, 8-32, Thread-Forming, Black 70000143-06
Mounting the LED Message Board
To mount the Message Board to the vehicle:
1. Determine the appropriate spacing for the mounting holes for your application.
2. Adjust the locations of the mounting brackets. See Figure 1.
Figure 1 LED Message Board with mounting hardware
CABLE
FERRITE
CABLE CONNECTOR
FROM MESSAGE
BOARD TO
CONTROLLER
1/4" x 20 CARRIAGE BOLT (4)
1/4" FLAT WASHER (4)
9/16" FLAT WASHER (2)
3/8" CARRIAGE BOLT (2)
1/4-20 KEPS NUT (4)
3/8" FLAT WASHER (2)
MOUNTING BRACKET (2)
3/8-16 NUT (2)
3/8" LOCKWASHER (2)
290A7192C
8-32 THREAD-FORMING
SCREW (2)

88 Model MB1 LED Message Board
Federal Signal www.fedsig.com
Wiring the LED Message Board System in the Vehicle
3. Secure the mounting brackets to the Message Board with the 1/4-inch hardware.
4. Start one 8-32 thread-forming screw in each sliding bracket, in the end most easily
accessed. Do not tighten the screws at this time.
5. Mark the locations of the 3/8-inch mounting holes.
DRILLING PRECAUTIONS: When drilling holes, check the area you are drilling
into to ensure that you do not damage vehicle components while drilling. All
drilled holes should be deburred, and all sharp edges should be smoothed. All
wire routings going through drilled holes should be protected by a grommet or
convolute/split loom tubing.
6. Drill the marked mounting holes with a 13/32-inch drill, and drill an appropriate cable
hole as needed.
7. If the mounting surface is less than 1/8-inch thick, use the 9/16-inch flat washers
between the mounting brackets and surface. Loosely assemble both sides with the
3/8-inch hardware.
8. Route the cable.
9. Level the Message Board and tighten the nuts.
10. Tighten the 8-32 thread-forming screws just enough to keep the Message Board from
sliding on the mounts. Do not pierce the polycarbonate housing with the screws.

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Wiring the LED Message Board System in the Vehicle
Wiring the LED Message Board System in the Vehicle
The LED Message Board is completely wired at the factory and does not require any
additional internal wiring. It has two 14 AWG power conductors (red and black) and a
connection for a Convergence Network communication cable. The conductors necessary
to control the Message Board are contained in the Convergence Network cable, which
connects to a compatible Federal Signal Message Board Control Head.
INSTALLATION PRECAUTIONS: The warning system and/or two-way radio
system may operate improperly if a two-way radio antenna is installed on or
within 18 inches of the light bar. Before permanently installing the light bar or
a two-way radio antenna, test the warning system and two-way radio system.
Some installations may require the relocation of the two-way radio antenna
to the trunk or fender. DO NOT drill holes in the light bar or install auxiliary
devices on the light bar, or the warning system may fail.
LOCATING OPERATOR CONTROLS: The controls for the light system must be
located so that the VEHICLE and CONTROLS can be operated safely under all
driving conditions.
EXPLOSION HAZARD: To avoid a battery explosion, always disconnect the
negative battery cable rst and reconnect it last. Avoid causing a spark when
connecting near or to the battery. The gases produced by a battery can cause
a battery explosion that could result in vehicle damage and serious injury.
REVERSE POLARITY/MISWIRING: Reverse polarity may damage the siren
amplier. To avoid damage to the siren/amplier, ensure that the battery
voltage is the same voltage as the rating of the light and that the correct
polarity is observed.
Wiring the Standalone-Mount Message Board
The Message Board draws approximately 50 mA in standby. To avoid excessive battery
drain, use an ignition-switch source for the Message Board only.
To wire the Standalone-Mount Message Board:
1. Ensure that the lines are adequately fused. Route the Convergence Network cable
from the Message Board into the cab or trunk of the vehicle and to the planned
location of the Message Board control head. See Figure 2.

1010 Model MB1 LED Message Board
Federal Signal www.fedsig.com
Wiring the LED Message Board System in the Vehicle
Figure 2 LED Message Board wired to control head
290A7198D
12 V BATTERY
+
−
CAT5
BROWN (OPTIONAL)
DEFAULT MESSAGE
RED
100 mA
RED
BLACK
BLACK
5 A
20 A
22 AWG
22 AWG
14 AWG
14 AWG
22 AWG
22 AWG
YELLOW + IGN
+ IGN
CONTROL HEAD
LED MESSAGE BOARD
2. Route and connect the 14 AWG black lead to the ground (-NEG) terminal of the vehicle
battery.
3. Route and connect the 14 AWG red lead through a 20 A fuse at an appropriate circuit
in the vehicle that provides +12 V when ignition is activated.
Wiring the Message Board Control Head
For the Message Board to operate properly, the power wires from the control head must
be wired directly to battery power and not to a switched power source. Failure to do so
may reduce the lifetime of its internal battery required to keep accurate time. The control
head also includes an IGN sense wire that, when disengaged, turns o the control head
after 15 seconds. If preferred, the control head includes an active-low wire that activates the
default message (Message One) when battery ground (-NEG) is applied to it. For the wiring
diagrams, see Figures 2 and 3.
To wire the Message Board control head:
1. Ensure that the lines are adequately fused.
2. WITHOUT A FEDERAL SIGNAL SIREN: f you are installing the Message Board system
without a Federal Signal Convergence Network siren, insert the Convergence
Network connector from the Message Board into one of the two modular connectors
in the back of the control head. See Figure 2 on page 10.

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Wiring the LED Message Board System in the Vehicle
WITH A FEDERAL SIGNAL SIREN: See Figure 3.
a. If you are installing the system in a vehicle with a Federal Signal
Convergence Network siren, plug the Convergence Network connector from
the Message Board into one of the available modular connectors in the back
of the siren
b. Carefully route the included 25-foot CAT5 cable from another open
connection on the siren through the vehicle to where the control head will
be mounted.
c. Using the additional modular connector on the back of the Message Board
control head, plug in any additional Convergence Network control heads.
Figure 3 Convergence Network connections with siren
LED MESSAGE BOARD
25 ft CAT5
290A7199B
SMARTSIREN
CONTROLLER
LED MESSAGE BOARD
CONTROL HEAD
SMARTSIREN
CONTROLLER
OR
PA300-CN
CAT5
CAT5
3. Route and connect the 22 AWG black lead to the ground (–NEG) terminal of the
vehicle battery.
4. Route and connect the 22 AWG red lead through a 5 A fuse at the source to the
positive (+BAT) terminal.
5. Route and connect the 22 AWG yellow lead to an appropriate circuit in the vehicle
that provides +12 V when ignition is activated.
6. OPTIONAL: For default message activation (message number one), route and connect
the 22 AWG brown lead through an installer-supplied switch with a capacity of 100
mA to an appropriate circuit in the vehicle that provides battery ground (-NEG) when
default message activation is required.

1212 Model MB1 LED Message Board
Federal Signal www.fedsig.com
Safety Message to Operators of Warning Light Equipment
Safety Message to Operators of Warning Light Equipment
People’s lives depend on your safe use of our products. Listed below are some important
safety instructions and precautions you should follow:
• Do not attempt to activate or deactivate the light system control while driving in a
hazardous situation.
• Although your warning system is operating properly, it may not be completely
eective. People may not see or heed your warning signal. You must recognize this
fact and continue driving cautiously.
• Situations may occur that obstruct your warning signal when natural and man-made
objects are between your vehicle and others, such as raising your hood or trunk lid. If
these situations occur, be especially careful.
• All eective sirens and horns produce loud sounds that may cause, in certain
situations, permanent hearing loss. You and your passengers should consider taking
appropriate safety precautions, such as wearing hearing protection.
• In order to be an eective warning device, this product produces bright light that can
be hazardous to your eyesight when viewed at a close range. Do not stare directly
into this lighting product at a close range, or permanent damage to your eyesight may
occur.
• It is important that you fully understand how to safely operate this warning system
before use.
• Operate your vehicle and its light/sound system in accordance with your department’s
Standard Operating Procedures.
• If a selected function does not perform properly or if any of the lamps remain illuminated
when the control is o, disconnect the power connector from the control unit and
contact the nearest service center.
• At the start of your shift, ensure that the entire warning light system and the siren
system is securely attached and operating properly.
• Suction cup mounting is for temporary applications only. The unit should be removed
from the window and stored securely when not in use. Temperature changes and
sunlight can cause suction cups to lose holding power. Periodically check the unit to
ensure that the suction cups have a firm grip on the mounting surface. An improperly
secured light could fall o of the vehicle causing injury and damage.
• The holding power of magnetic mounting systems is dependent upon surface finish,
surface flatness, and thickness of the steel mounting surface. Therefore, to promote
proper magnetic mounting:
• Keep the mounting surface and magnets clean, dry, and free of foreign particles
that prevent good surface contact.
• Ensure that mounting surface is flat.
• Do not use a magnet mounting system on vehicles with vinyl tops.
• To prevent sliding of light assembly on mounting surface, avoid quick acceleration
and hard stops.
Failure to follow these precautions may result in property damage, serious injury, or death.

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Operating the LED Message Board Controls
Operating the LED Message Board Controls
The Message Board is controlled entirely with the control head either through the
numeric keypad or by activating wires in the back of the control head. To activate a
message, use the numeric keypad to enter a message or use the arrow keys to scroll
up or down to select a message, then press ENT(ER). Alternatively, you can activate the
default message wire to turn on Message One, the default message.
Testing the Message Board System
LIGHT HAZARD: To be an eective warning device, an emergency warning
system produces bright light that can be hazardous to your eyesight when
viewed at close range. Do not stare directly into the lights at close range, or
permanent damage to your eyesight may occur.
To test the Message Board system:
1. Follow all the instructions in “Wiring the LED Message Board System in the Vehicle”
on page 8.
2. Cycle IGN and verify that the control head powers up when IGN is activated and
turns o after 15 seconds when IGN is deactivated
3. Enter a message number through the numeric keypad to activate a message, and
press ENT. The LCD screen should display the activated message; the Message
Board should display the message as well. If there is an error, the LCD screen may
notify you.
4. OPTIONAL: Verify that the default message (Message One) is activated when the
default message wire of the control head is activated.
5. After the installation, check the entire system to make sure the lights are flashing
properly and all light system functions are operating properly.

1414 Model MB1 LED Message Board
Federal Signal www.fedsig.com
Setting Conguration Options
Setting Conguration Options
All Message Board settings and options are configured through various menus accessed
through the numeric keypad and LCD screen of the control head while it is operational.
There are two menus, Standard and Secure, that allow dierent information to be viewed
and configuration options to be set. To prevent unwanted access and changes to the
system, the Security Menu is accessible only with a numeric Fleet Password created by
the installer during installation of the Message Creation software. For more information,
see “Fleet Password and Security” on page 15.
To navigate menus, use the up/down arrows, or simply press the number associated with
that menu. If you do not press a key within 15 seconds, the menu times out and returns to
normal operation.
The Standard Menu has these menu items:
0. Adjust Keypad Backlight Level
1. Adjust LCD Contrast Level
2. View Date & Time
3. View Control Head Firmware Version
4. View Message Sign Firmware Version
5. Enter Security Menu
6. Update Messages via USB Flash Drive
7. Exit Standard Menu
The Security Menu has these menu items:
0. Change Date
1. Change Time
2. Adjust Message Board Intensity
3. Reset Fleet Password
4. Update Control Head Firmware
5. Exit Security Menu

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Setting Conguration Options
Entering the Standard Menu
To enter the Standard Menu:
1. Make sure that the control head is powered up and running.
2. Press and hold the ESC(APE) key for at least three seconds to enter the menu. The
control head beeps once you enter the Standard Menu and display the first menu
entry.
3. Use the up/down arrows or press the number associated with that menu to go the
menu item you want to view or change.
4. If you can change the menu item, use the keypad to enter your change, and press
ENT to confirm it.
Entering the Security Menu
To enter the Security Menu:
1. Put the control head in the Standard Menu as described in the previous section.
2. Use the up/down arrows or press 5 to navigate to the Security Menu option within the
Standard Menu.
3. The display notifies you whether the Security Menu is locked or unlocked.
• If unlocked, press ENT to enter the Security Menu.
• If locked, the display prompts you to enter the numeric Fleet Password created by
the installer during installation of the Message Creation software.
You have three attempts to enter the Fleet Password correctly. The fourth attempt locks
the menu. Battery power must be cycled to the control pad to try again. See more
information on “Fleet Password and Security” below.
Exiting the Standard or Security Menu
To exit the Standard or Security Menu, navigate the Exit Settings, press ENT, or wait
15seconds for the keypad to exit the configuration menus.
Fleet Password and Security
The control head ships from the factory unlocked (i.e., no Fleet Password set) and with
a default message set. The control head uses a numeric fleet password to prevent
unauthorized message set downloads. When the Message Creation software is installed,
a numeric fleet password is created by the installer. The password is stored into every
message set created by the installation. If the control head is unlocked, the first message
set loaded transfers the numeric Fleet Password to the keypad. Any subsequent message
sets loaded must match the Fleet Password from the original file; otherwise, the keypad
will not accept the file. The Fleet Password is also used to access the Security Menu to
change configuration options.

1616 Model MB1 LED Message Board
Federal Signal www.fedsig.com
Setting Conguration Options
There are two ways to reset the Fleet Password:
If you know the Fleet Password
Navigate to the Security Menu (see page 14) and use the Reset Fleet Password menu
option.
If you do not know the Fleet Password
To unlock the control head:
1. Disconnect and apply +12 V (+BAT) on the yellow, blue, and orange wires.
2. Apply ground (-NEG) on the brown and black wires. Finally apply 12 V to the red wire.
3. After a few seconds press ENT to confirm resetting the Fleet Password.

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Maintaining the Message Board
Maintaining the Message Board
Establishing a regular maintenance schedule for the LED Message Board extends its life
and ensures safety. Periodically verify that the Message Board operates properly and
that all mounting hardware is securely fastened to the vehicle. Inspect the reflectors for
cracks, crazing (hairline cracks), discoloration, and other defects.
Replacing the Internal 15 A Fuse
The Message Board is protected with an internal 15 A blade fuse on the upper rear corner
of the driver-side PCBA. See Figure 4. To see if the fuse is bad, inspect the horseshoe-
shaped wire in it to see if it has burned through and broken the circuit.
Figure 4 Fuse location on PCB
DRIVER-SIDE END CAPS
PHILLIPS PLASTITE
SCREW (4)
ALUMINUM CARRIER
15 A BLADE FUSE
ON PCB
290A7196B
STATIC-SENSITIVE DEVICE: The light bar circuitry can be damaged by
electrostatic discharge (ESD). Follow anti-static procedures while installing the
light bar.
To replace the fuse:
1. Remove the four Phillips PLASTITE®screws from the driver-side end of the Message
Board.
2. Remove the two end caps.
3. To access the fuse, slide the aluminum carrier and PCBs out approximately two inches.
4. Pull the fuse straight out to avoid damaging the connector.
5. Gently press a new fuse of the same type and amperage into the connector. Ensure
that all pins are properly seated.
6. Reassemble the Message Board. Use caution to prevent stripping the threads in the
polycarbonate housing.

1818 Model MB1 LED Message Board
Federal Signal www.fedsig.com
Getting Technical Support and Service
Getting Technical Support and Service
For technical support and service, please contact:
Service Department
Federal Signal Corporation
Phone: [phone]
Email: [email protected]
www.fedsig.com
Getting Repair Service
The Federal Signal factory provides technical assistance with any problems that cannot
be handled locally.
Any units returned to Federal Signal for service, inspection, or repair must be
accompanied by a Return Material Authorization (RMA). Obtain a RMA from a local
Distributor or Manufacturer’s Representative.
Provide a brief explanation of the service requested, or the nature of the malfunction.
Address all communications and shipments to the following:
Federal Signal Corporation
Service Department
2645 Federal Signal Drive
University Park, IL 60484-3167

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Ordering Replacement Parts
Ordering Replacement Parts
To order replacement parts, please contact your local dealer/distributor or:
Customer Support
Federal Signal Corporation
Phone: [phone]

2645 Federal Signal Drive
University Park, Illinois 60484-3167
www.fedsig.com
Customer Support
Police/Fire-EMS: 800-264-3578 • [phone]
Work Truck: 800-824-0254 • [phone]
Technical Support 800-433-9132 • [phone]