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SECTION V
SERVICE AND MAINTENANCE
SAFETY MESSAGE TO PERSONNEL SERVICING
FEDERAL SIGNAL ELECTRONIC SIRENS
AND LIGHT/SOUND SYSTEMS
People’s lives depend on your proper servicing of
Federal Signal products. It is important to read
and follow all instructions shipped with the
products. In addition, listed below are some other
safety
instructions and precautions you should follow:
• Read and understand all instructions in this
manual before servicing the electronic siren or
control head.
• To properly service an electronic siren or control
head, you must have a good understanding of
automotive electrical procedures and systems,
along with proficiency in the installation and
service of safety warning equipment. Always
refer to the vehicle service manuals when
performing service on a vehicle.
• Electronic repairs must be performed by a
qualified and competent electronics technician.
Your hearing and the hearing of others, in or
close to your emergency vehicle, could be
damaged by loud sounds. This can occur from
short exposures to very loud sounds or from
longer exposures to moderately loud sounds.
For hearing conservation guidance, refer to
federal, state, or local recommendations.
OSHA Standard 1910.95 offers guidance on
“Permissible Noise Exposure.”
• All effective sirens and horns produce loud
sounds (120 dB) that may cause permanent
hearing loss. Always minimize your exposure
to siren sound and wear hearing protection. Do
not sound the siren indoors or in enclosed areas
where you and others will be exposed to the
sound.
• Do NOT connect this system to the positive
terminal of the battery until servicing is
complete and you have verified that there are no
short circuits to ground.
• For the electronic siren to function properly,
the ground connection must be made to the
NEGATIVE battery terminal.
• After repair, test the electronic siren and speaker
system to ensure that it is operating properly.
• Federal Signal siren amplifiers and speakers
are designed to work together as a system.
Combining a siren and speaker from different
manufacturers may reduce the warning
effectiveness of the siren system and may
damage the components. You should verify or
test your combination to make sure the system
works together properly and meets both federal,
state and local standards or guidelines. Failure
to follow all safety precautions and instructions
may result in property damage, serious injury,
or death.Failure to follow all safety precautions
and instructions may result in property damage,
serious injury, or death to you or others.
5-1. GENERAL
Most of the component electronic parts used in
the Model PA4000 are standard items that can be
obtained from any radio or electronics supply shop.
In order to reduce equipment down-time, Federal
recommends that the entire Amplifier power
printed circuit board (Part No.2001191A-01) or
Amplifier logic circuit board (Part No. 2001191A-
02) be replaced. The printed circuit boards are
relatively inexpensive allowing you to keep an
adequate supply in your repair shop.
The factory can and will service your equipment
or assist you with technical problems, should any
arise, that cannot be handled satisfactorily and
promptly locally.
Communications and shipments should be
addressed to:
Service Department
Federal Signal Corporation
2645 Federal Signal Drive
University Park, IL 60466
1-800-433-9132
(In Illinois) 1-708-534-3400
