Page 1
3000A
Fire Apparatus
Intercom System
A Division of Sonetics Corporation
INSTALLATION &
OPERATOR'S
MANUAL
Rev.3
Page 2
3000A
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
COMPONENT IDENTIFICATION ..................................................... 1
SYSTEM DESCRIPTION ................................................................. 2
PRE-INSTALLATION........................................................................ 2
Determine System Mounting Locations
INSTALLATION
Modular Cables......................................................................... 3
Interface Connections ............................................................... 3
Intercom Unit ............................................................................ 3
Headset Module/HM-1 .............................................................. 5
TYPICAL CONFIGURATION............................................................ 4
OPERATION
Headsets .................................................................................. 5
Headset Adjustments................................................................ 5
Headset Volume ....................................................................... 6
Intercom Unit ............................................................................ 6
Digital Message Recorder (DMRTM) .......................................... 6
SYSTEM SETUP & TEST ................................................................ 6
TROUBLESHOOTING ..................................................................... 7
TECHNICAL DATA
Installation Requirements ......................................................... 8
Alternator Whine and other Distracting Noises ......................... 9
Technical Notes ........................................................................ 9
SPECIFICATIONS ...........................................................................10
Warranty ..................................................................................10
OPTIONS and ACCESSORIES....................................................... 11
EXTENDED TROUBLESHOOTING ................................................12
Intercom 3000A shown with
optional Dual Radio Interface
Please Read this Manual CompletelyPlease Read this Manual Completely
Please Read this Manual Completely
Please Read this Manual CompletelyPlease Read this Manual Completely
Before Starting InstallationBefore Starting Installation
Before Starting Installation
Before Starting InstallationBefore Starting Installation
The information in this document is subject to change without notice.
No part of this document may be copied or reproduced in any form without
prior written consent of Sonetics Corporation.
Sonetics Corporation
7340 SW Durham Rd. • Portland, Oregon 97224
1-800/527-0555 • 503/684-6647
www.firecom.com
sales@firecom.com
Optional “Behind-the-Helmet” Headset
©1994 Sonetics Corporation. All Rights Reserved. PRINTED IN U.S.A.
Page 3
3000A
COMPONENT COMPONENT
COMPONENT
COMPONENT COMPONENT
IdentificationIdentification
Identification
IdentificationIdentification
Radio Transmit Headset showing red
at top of ear dome.
Headset Module showing headset modular
cable input from intercom
radio transmit button
Jumpseat showing black
at top of ear dome
Modular Cable and Plug
intercom transmit button
1
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3000A
SYSTEM DESCRIPTIONSYSTEM DESCRIPTION
SYSTEM DESCRIPTION
SYSTEM DESCRIPTIONSYSTEM DESCRIPTION
OVEROVER
OVER
OVEROVER
The FIRECOM system is designed specifically for Fire
Apparatus use. It improves voice communications between apparatus personnel and provides hearing protection from high noise levels. It also augments normal
radio communications by interfacing directly to the apparatus radio(s). Six headset connections are provided,
and three have radio transmit capabilities.
VOICE VOICE
VOICE
VOICE VOICE
The Intercom 3000A includes a state-of-the-art squelch
circuit which cancels background noise until you speak.
This circuit quickly activates to include the first spoken
syllable. In addition, the audio signal is processed to
reduce wind, siren, horn, and engine noise. Mic muffs
are included with headsets to aid in wind noise reduction.
COMPCOMP
COMP
COMPCOMP
The Intercom 3000A is compatible with all UHF/VHF Fire
service radios, including 24 volt applications.
CONTINUOUS RADIO MONITCONTINUOUS RADIO MONIT
CONTINUOUS RADIO MONIT
CONTINUOUS RADIO MONITCONTINUOUS RADIO MONIT
All personnel on the intercom will hear the radio traffic
regardless of other intercom activity.
INTERCOM CONTROL FUNCTIONSINTERCOM CONTROL FUNCTIONS
INTERCOM CONTROL FUNCTIONS
INTERCOM CONTROL FUNCTIONSINTERCOM CONTROL FUNCTIONS
DUAL-RADIO INTERFDUAL-RADIO INTERF
DUAL-RADIO INTERF
DUAL-RADIO INTERFDUAL-RADIO INTERF
If you need to interface the intercom to more than one
radio in a vehicle, FIRECOM can provide a solution
through our Dual Radio Interface. For more information,
please contact our technical staff at:
Digital Message Recorder Digital Message Recorder
Digital Message Recorder (DMRTM)
Digital Message Recorder Digital Message Recorder
The “Digital Message Recorder”, a one megabit voice
memory card, provides up to 32 seconds of voice recording. You can record radio or intercom communications and play them back immediately. FIRECOM technology provides you with unlimited instantaneous replays
of incident address, apparatus assignments, and other
critical information.
VIEWVIEW
VIEW
VIEWVIEW
INSTINST
ALLAALLA
INST
INSTINST
NO wire tangles...NO soldering..EASY to followNO wire tangles...NO soldering..EASY to follow
NO wire tangles...NO soldering..EASY to follow
NO wire tangles...NO soldering..EASY to followNO wire tangles...NO soldering..EASY to follow
Squelch:
Volume Control:
TION OF THIS SYSTEM IS MODULAR!TION OF THIS SYSTEM IS MODULAR!
ALLA
TION OF THIS SYSTEM IS MODULAR!
ALLAALLA
TION OF THIS SYSTEM IS MODULAR!TION OF THIS SYSTEM IS MODULAR!
step-by-step instructionsstep-by-step instructions
step-by-step instructions
step-by-step instructionsstep-by-step instructions
ACTIVACTIV
ACTIV
ACTIVACTIV
AA
TIBILITYTIBILITY
A
TIBILITY
AA
TIBILITYTIBILITY
noise levels.
phone/headset sensitivities with ample reserve
volume. Volume control does not affect apparatus radio volume.
AA
TED with Noise CancellationTED with Noise Cancellation
A
TED with Noise Cancellation
AA
TED with Noise CancellationTED with Noise Cancellation
ORINGORING
ORING
ORINGORING
Adjusts for a wide range of background
Easily adjusts to varying micro-
ACEACE
ACE
ACEACE
1-800/527-0555
The FIRECOM Digital
Message Recorder
Board is a solid-state
device with no moving
parts.
PRE-INSTPRE-INST
PRE-INST
PRE-INSTPRE-INST
DETERMINE SYSTEM MOUNTING LOCADETERMINE SYSTEM MOUNTING LOCA
DETERMINE SYSTEM MOUNTING LOCA
DETERMINE SYSTEM MOUNTING LOCADETERMINE SYSTEM MOUNTING LOCA
When locating the system installation, consider areas
which will provide ease of operation. (See illustrated
examples of typical installations on page 4.)
When mounting the system components, verify that
drilling through surfaces will not cause damage to
adjacent wiring or equipment.
When selecting your intercom unit location, be sure to
leave at least three inches behind it for cable clearance.
The mounting surface should be flat, fixed, and without
excessive vibration. The surfaces should be able to accept #8 sheet metal screws.
INTERCOM
Intercom Rear Spacing Diagram
The Intercom 3000A is provided with a mounting bracket
for dashboard, center console, or overhead mounting.
The mounting bracket slots permit limited rotation of the
Intercom Unit.
Behind-the-head or over-the-shoulder mounting of the
headset modules is usually most convenient. Locate a
flat area that permits surface mounting for each module.
It will be useful to mount a hook or hanger nearby for
storage when the headset is not in use.
ALLAALLA
ALLA
ALLAALLA
CAUTION CAUTION
CAUTION
CAUTION CAUTION
UNIT
TOP VIEW
TIONTION
TION
TIONTION
3 inches
TIONSTIONS
TIONS
TIONSTIONS
25-Pin
Connector
Modular
Cables
2
Page 5
3000A
If you wish to have an uncovered plug-in module near a
pump panel, for example, FIRECOM has a waterproof enclosure available. The modular connectors used in the
system are gold-plated to resist corrosion. The cabling
may be installed on the surface, or you may choose to hide
it behind panels, headliners, door sills, etc. Protect any
cabling run through bulkheads or other sheet metal by use
of grommeted holes to prevent damage to the cables.
Prior to securing the system components in place, verify
the layout for:
• Control accessibility
• Headset storage
• Headset cable reach
• Interconnect cable length
• Ease of installation
Stow any excess cable length behind panels or other outof-the-way locations. Additional interconnect cables may
be ordered from FIRECOM if needed.
NOTENOTE
NOTE
NOTENOTE
Headset modules may be daisy-chained to the same
intercom connection, but multiple headsets on one
chain may reduce the received audio. This permits
multiple location use of each intercom channel.
INSTINST
INST
INSTINST
apparatus master switch before working on circuitry.
MODULAR CABLESMODULAR CABLES
MODULAR CABLES
MODULAR CABLESMODULAR CABLES
Cables are fabricated at the factory in set lengths. Do
not cut these cables unless you are familiar with phone
plug crimping techniques and have the proper tools.
Additional cables may be ordered from FIRECOM if
needed.
ALLAALLA
ALLA
ALLAALLA
To avoid damage or injury, always turn OFF the
TIONTION
TION
TIONTION
W W
ARNINGARNING
W
ARNING
W W
ARNINGARNING
INTERFINTERF
INTERF
INTERFINTERF
The Intercom 3000A includes a 25-pin connector and
interface cable for connection to the fire apparatus. Connections to power and to the radio are made through this
cable. We recommend that these connections be made
by a qualified radio technician.
See the section on Technical Information for specific
INTERCOM UNITINTERCOM UNIT
INTERCOM UNIT
INTERCOM UNITINTERCOM UNIT
After selecting your mounting location, mark where you
want to set the mounting bracket.
Be sure to observe the location criteria mentioned in
1. Remove the mounting bracket and set the intercom
2. Set the mounting bracket in the place marked and
3. Drill two holes for the #8 sheet metal screws.
4. Mount the bracket.
5. Attach the intercom to the mounting bracket and in-
ACE CONNECTIONACE CONNECTION
ACE CONNECTION
ACE CONNECTIONACE CONNECTION
NOTENOTE
NOTE
NOTENOTE
details on wire and pin locations and assignments
NOTENOTE
NOTE
NOTENOTE
the section on PRE-INSTALLATION.
unit aside
mark the location for the mounting screw holes.
stall all the cables. Be sure to tighten the screws on
the 25-pin interface connector.
Sheet Metal
Screws
NOTENOTE
NOTE
NOTENOTE
Read the Pre-Installation section before attempting
installation. All cables should be installed prior to final
placement of other system components. Be sure to have
all system component locations pre-selected and
marked.
Observe that there are three INTERCOM/TRANSMIT
ports and three INTERCOM ONLY ports at the rear of
the Intercom 3000A (see photo). In a typical installation
this would allow the Officer, Engineer/Driver, and Pump
Panel positions to be connected to the INTERCOM/
TRANSMIT side and the jumpseat positions to the INTERCOM ONLY side.
Intercom
Bracket
Intercom Mounting Bracket
3
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3000A
TYPICAL CONFIGURA-TYPICAL CONFIGURA-
TYPICAL CONFIGURA-
TYPICAL CONFIGURA-TYPICAL CONFIGURA-
Officer
& Driver
Jump
Seat(s)
Tailboard
(Apparatus
Backup
Assist)
Pump Panel
Pump
Panel
Driver
Firefighter
Dashboard Installation
TOP VIEW OF APPARATUS CAB
Officer
Headset
Jack Module
Intercom
Driver
Pump Panel
Officer
Firefighter
Overhead Installation
TOP VIEW OF APPARATUS CAB
4
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3000A
HEADSET MODULEHEADSET MODULE
HEADSET MODULE
HEADSET MODULEHEADSET MODULE
Note that the modular cables plug into each module on
the side below the label. The connector on the opposite
side is for daisy-chaining. Headset modules may be
daisy-chained to the same intercom connection, but only
one headset may be used at a time on each chain.
Plug Socket for Daisy Chain
OPERAOPERA
OPERA
OPERAOPERA
TIONTION
TION
TIONTION
Headset
Jacks
Mounting
Hole(2)
Label
Plug
Cable from
Intercom
Headset Module
TOP VIEW
Do a final location check to ensure that the headset cable
lengths and mounting clearances are adequate before
securing the modules.
Reminder: Reminder:
Reminder: HM-1 Headset Modules should be placed in
Reminder: Reminder:
the cab with the following in mind.
→→
→
Locate the modules close enough to the side window
→→
to enable the driver and engineer to have an unobstructed
view out the windows without putting a strain on the
cables.
→→
→
If possible, locate the modules so that the jacks face
→→
in the direction of exit from the cab. This can prevent
damage if the headset wearer inadvertently forgets to
remove the headset when exiting.
1. Mark the desired location of the module mounting
holes.
2. Drill two holes and secure the modules using two #8
sheet metal screws (provided).
3. Plug unused, exposed connections with silicone
sealant to avoid problems from salt air or excessive
moisture.
Headset modules mounted in exposed locations such
as a pump panel should be contained in a water proof
enclosure. Waterproof enclosures containing headset
modules with cables attacked are available from Firecom.
Plug Socket
HEADSETSHEADSETS
HEADSETS
HEADSETSHEADSETS
The FIRECOM system offers two types of headsets:
Radio Transmit Headset and Jumpseat Headset. Refer
to photos on page 1. Other optional headsets may also
be supplied.
All headsets must be plugged into a Headset Module for
operation.
Radio TRadio T
Radio T
Radio TRadio T
Radio TRadio T
Radio T
Radio TRadio T
intercom and radio communications at all times. It is
also hands-free, voice-activated to the intercom. When
you wish to transmit over the radio, simply depress and
hold the
is typically located at the Driver, Officer, and Pump Panel
positions.
Jumpseat Headset:Jumpseat Headset:
Jumpseat Headset: This headset receives both inter-
Jumpseat Headset:Jumpseat Headset:
com and radio communications at all times, but it is not
radio transmit capable. It is typically located at the
jumpseat position. Due to the higher ambient noise level
at this location (engine noise, etc.) it is not voice-activated. When you wish to speak over the intercom, depress and hold the
HEADSET ADJUSTMENTSHEADSET ADJUSTMENTS
HEADSET ADJUSTMENTS
HEADSET ADJUSTMENTSHEADSET ADJUSTMENTS
All “FH” headsets have adjustable headbands with slide
mechanisms located at each side above the ear domes.
Adjust for a comfortable fit. If the adjustment slides become loose, gently tighten the self-locking hex nuts. All
“UH” (Under-the-Helmet) headsets have an adjustable
velcro head strap. Adjust either type of headset to position the liquid-filled ear seals for best noise reduction and
comfort. Washable cloth covers are provided to absorb
moisture. Replacement covers are available from Firecom.
ransmitransmit
ransmit
ransmitransmit
ransmit Headset:ransmit Headset:
ransmit Headset: This headset receives both
ransmit Headset:ransmit Headset:
RED RED
RED Push-To-Talk (PTT) button. This headset
RED RED
JumpseatJumpseat
Jumpseat
JumpseatJumpseat
BLACK BLACK
BLACK PTT button.
BLACK BLACK
5
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3000A
IMPORTIMPORT
IMPORT
IMPORTIMPORT
This is a
outside noise level to voice level. To operate properly,
it must be positioned at the corner of your mouth and
Noise-cancelling MicrophoneNoise-cancelling Microphone
Noise-cancelling Microphone. It compares
Noise-cancelling MicrophoneNoise-cancelling Microphone
no more than 1/8 inch from your lips.no more than 1/8 inch from your lips.
no more than 1/8 inch from your lips.
no more than 1/8 inch from your lips.no more than 1/8 inch from your lips.
ANT NOTE!ANT NOTE!
ANT NOTE!
ANT NOTE!ANT NOTE!
1/8"
from mouth
To playback, set the toggle switch to PLAY, and press
the START button. The recording will be replayed each
time you press the START button, as many times as desired. To stop the playback before the message is completed, set the toggle switch to RECORD and quickly back
to PLAY again. The message will not be erased unless
the START button is pressed while in the RECORD mode.
Disconnecting power will erase the recording.
The DMR
or PLAY mode.
SYSTEM SETUP & TESTSYSTEM SETUP & TEST
SYSTEM SETUP & TEST
SYSTEM SETUP & TESTSYSTEM SETUP & TEST
TM
may be left idle and ready in either RECORD
A mic muff on each headset microphone is provided to
help reduce wind noise.
Each headset has two plugs of different size which correspond to the appropriate connectors on the Headset
Module.
HEADSET VOLUMEHEADSET VOLUME
HEADSET VOLUME
HEADSET VOLUMEHEADSET VOLUME
Preset each headset volume to the highest setting (full
clockwise). Set the radio volume to a level above the
normal comfortable listening level but at a level which
does not cause distortion. Reset the individual headset
volume for best listening level.
INTERCOM 3000AINTERCOM 3000A
INTERCOM 3000A
INTERCOM 3000AINTERCOM 3000A
Volume: This is a master intercom volume control to all
headsets on the system. Adjust it to match the radio
volume adjusted above.
Squelch: This control is adjusted from the Driver or Officer position, while wearing a Radio Transmit Headset.
Adjust it with the apparatus engine running, so that “normal” background noise is present. Start with this control
fully clockwise; then slowly rotate counterclockwise until
the background noise is no longer heard. Do not set this
control any further than necessary. Once set correctly,
additional adjustment should not be required.
NOTENOTE
NOTE
NOTENOTE
These controls do not affect the radio
squelch control setting.
DIGITDIGIT
ALAL
DIGIT
DIGITDIGIT
To record, set the toggle switch to RECORD, and press
the START button. The red LED confirms you are set to
the recording mode. The yellow LED indicates the DMR
has been started. To make a new recording, switch to
PLAY and back to RECORD, and press the START button. A new recording replaces any previous one. To
stop recording before the 32 second time limit is reached,
simply set the toggle switch to PLAY.
MESSAGE RECORDER MESSAGE RECORDER
AL
MESSAGE RECORDER (DMRTM)
ALAL
MESSAGE RECORDER MESSAGE RECORDER
TM
The Intercom 3000A radio transmit level has been preset to a nominal level at the factory. In most installations,
satisfactory performance is obtained without having to
re-adjust this level. However, if it is necessary, optimal
RF carrier modulation level may be set by adjusting the
“Transmit Level Adjustment” potentiometer. This control
is located on the interface circuit board of the System
3000A Intercom and can be accessed by removing the
top metal case of the System 3000A Intercom. See interface Circuit Board layout below.
This adjustment should be performed by a qualified radio technician with access to a suitable RF communications test set.
Intercom 3000A
Internal Circuit Board
Transmit Level Adjust
Intercom 3000A Interface Circuit Board Layout
Power OnPower On
Power On
Power OnPower On
1. Turn on the Intercom 3000A at the apparatus master switch
2. Confirm that power is applied to the system by placing the RECORD/PLAY switch to RECORD and
observing that the red LED illuminates.
3. Install a Radio Transmit Headset at the Officer’s or
Driver’s HM-1 position.
Adjust headset(s)Adjust headset(s)
Adjust headset(s)
Adjust headset(s)Adjust headset(s)
4. Adjust the headset headband for a comfortable fit.
6
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3000A
5. Adjust the microphone boom to place the microphone at the corner of your mouth and approximately
1/8” from your lips.
6. Speak into the microphone to confirm intercom operation. You should hear yourself through the headset.
Adjust VAdjust V
Adjust V
Adjust VAdjust V
7. Preset the headset volume and the Intercom Unit
8. Adjust intercom volume for a comfortable listening
9. Test radio communications by pressing the Push-
TT
est Digital Message Recorderest Digital Message Recorder
T
est Digital Message Recorder
TT
est Digital Message Recorderest Digital Message Recorder
10. With the RECORD/PLAY switch in RECORD (red
Repeat at Other StationsRepeat at Other Stations
Repeat at Other Stations
Repeat at Other StationsRepeat at Other Stations
11. Check the intercom and radio functions at each In-
12. Connect a Jumpseat Headset at an intercom only
13. Adjust the headset for a comfortable fit and micro-
14. Press the Push-To-Talk button and verify intercom
15. Test the intercom function at each intercom only sta-
System Dynamic TSystem Dynamic T
System Dynamic T
System Dynamic TSystem Dynamic T
16. Start the apparatus engine.
17. At an Intercom/Transmit station, located close to the
If static or noise is present on the circuit, it may be due
18. With the radio volume adjusted to the desired level,
19. Adjust the intercom Volume for best level in the in-
olumeolume
olume
olumeolume
squelch controls fully clockwise.
level.
To-Talk button on your headset and speaking into
the microphone. Adjust your headset volume control for best listening volume while monitoring radio
traffic.
LED on), press the START button (yellow LED on)
and speak into the microphone. Stop the recording
by placing the RECORD/PLAY switch to PLAY. Press
the START button and listen for a recording of what
you just said/
tercom/Transmit station as above.
station.
phone position.
operation by listening to your own voice.
tion.
estest
est
estest
Intercom Unit, check the operation of the intercom
and radio functions.
NOTENOTE
NOTE
NOTENOTE
to improper grounding.
(See the Technical Data section)
adjust your headset volume for best listening level.
tercom mode while speaking into the microphone.
20. Adjust the intercom Squelch Control counterclockwise just until the engine noise cannot be heard. Do
not over-adjust, or you may not be able to hear the
normal intercom traffic.
Final adjustment of these controls will be required under
actual apparatus operating conditions.
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTING
TROUBLESHOOTINGTROUBLESHOOTING
If Unit Doesn’t WIf Unit Doesn’t W
If Unit Doesn’t W
If Unit Doesn’t WIf Unit Doesn’t W
√√
√ Check that apparatus master switch is on.
√√
√√
√ Check fuse or circuit breaker
√√
√√
√ Check system wiring and interconnections
√√
√√
√ Check that the headphones are plugged in all the
√√
way
√√
√ Check intercom and headset control settings
√√
√√
√ Check for corrosion on headset plugs
√√
√√
√ Check that the headsets are plugged into the cor-
√√
rect headset modules. A Radio Transmit Headset must be plugged into an Intercom/Transmit
headset location in order to transmit. A Jumpseat
Headset will not transmit under any circumstances
and is designed to be plugged into an Intercom
Only location.
Excessive Static or Noise:Excessive Static or Noise:
Excessive Static or Noise:
Excessive Static or Noise:Excessive Static or Noise:
→→
→ See the section on Technical Data.
→→
TROUBLESHOOTING?TROUBLESHOOTING?
TROUBLESHOOTING?
TROUBLESHOOTING?TROUBLESHOOTING?
ork as Expected:ork as Expected:
ork as Expected:
ork as Expected:ork as Expected:
If you have a problem or just a question,
call our Technical Support Staff
1-800/527-05551-800/527-0555
1-800/527-0555
1-800/527-05551-800/527-0555
7
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3000A
TECHNICALTECHNICAL
TECHNICAL
TECHNICALTECHNICAL
INSTINST
ALLAALLA
INST
ALLA
INSTINST
ALLAALLA
The FIRECOM System uses only seven wires for total apparatus/radio connection. The signals required are: Mic HI,
Spkr HI, Spkr LO, Radio PTT, Radio PTT Ref, Power, and GND. These signals provide easy connection to a wide variety
of apparatus radios whose input and output circuits are referenced to ground (or other system reference via A-). See
Functional Block Diagram below.
HEADSET PTT
PTT REF (10)
PTT TO RADIO (8)
TX HEADSET MIC
TX AUDIO HI (17)
TION REQUIREMENTS:TION REQUIREMENTS:
TION REQUIREMENTS:
TION REQUIREMENTS:TION REQUIREMENTS:
DA DA
DA
DA DA
PTT
TT
T
TT
AA
A
AA
TX Audio
Adjust
PTT1
Squelch
Volume
A+
A-
(21) SPEAKER HI
(FROM RADIO)
(13) SPEAKER LO
(FROM RADIO)
HEADSET AUDIO
(20) 12-24 VDC
(1) SIGNAL GROUND
Functional Block Diagram: Intercom 3000A
WW
ires & Connections ires & Connections
W
ires & Connections
WW
ires & Connections ires & Connections
Connector Pin # Wire Color System Function System Connection
10 Orange Radio PTT Ref. Connect to radio PTT Ref
8 Black Transmitter Key Connect to radio PTT input
17 White Transmit Audio Connect to radio Mic HI
21 Green Receive Audio Connect to Radio Speaker HI
13 Blue Receive Audio Connect to Radio Speaker LO
20 Red Power Supply Connect to switched and fused +12V to + 24VDC
1 Shield System GND Connect this wire to radio signal GND
Are Identified Are Identified
Are Identified
Are Identified Are Identified
As Follows:As Follows:
As Follows:
As Follows:As Follows:
Use 1/2 amp fast blow fuse (See System Specifications)
to minimize EMI/RFI problems.
8
Page 11
3000A
TECHNICALTECHNICAL
TECHNICAL
TECHNICALTECHNICAL
ALAL
TERNATERNA
AL
TERNA
ALAL
TERNATERNA
AND OTHER DISTRACTING NOISESAND OTHER DISTRACTING NOISES
AND OTHER DISTRACTING NOISES
AND OTHER DISTRACTING NOISESAND OTHER DISTRACTING NOISES
Because of the level of ambient noise present with the
apparatus motor running, alternator whine and other
noises may not be noticed in the communications systems until an intercom is added. A noisy system will always be apparent, however, once an intercom is installed.
Alternator whine and other noises on the communications circuit are due to two main causes:
→→
→ Improper installation.
→→
→→
→ A faulty alternator.
→→
Generally, the problem is not caused by the alternator. It
is usually the result of a difference in signal potential between the apparatus radio signal ground and the intercom signal ground. Additional sources may also exist in
the apparatus electrical system
TT
o reduce or eliminate alternator whine, performo reduce or eliminate alternator whine, perform
T
o reduce or eliminate alternator whine, perform
TT
o reduce or eliminate alternator whine, performo reduce or eliminate alternator whine, perform
the following:the following:
the following:
the following:the following:
❑ Connect the apparatus radio to the cleanest power
source possible; a source without motors (e.g., heaters, windshield wipers, etc.), sirens, strobes, or flashers.
❑ Use the same precautions when connecting the in-
tercom power.
❑ Ensure that all radio power and ground connections
are clean and tight.
❑ Ensure that the radio power and ground wires are of
sufficient gauge to prevent a signal developing
across them.
❑ Keep all battery connections clean and free from
dirt and corrosion.
❑ Use noise filters on radio and intercom power if
needed.
TT
OR WHINEOR WHINE
T
OR WHINE
TT
OR WHINEOR WHINE
DA DA
DA
DA DA
TT
T
TT
A-A-
A-
A-A-
cont.cont.
cont.
cont.cont.
TECHNICAL NOTES:
TECHNICALTECHNICAL
TECHNICAL
TECHNICALTECHNICAL
Our technical staff is just a phone call away. Contact us
at 1-800/527-0555.
ASSISTASSIST
ASSIST
ASSISTASSIST
ANCEANCE
ANCE
ANCEANCE
9
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3000A
SPECIFICASPECIFICA
SPECIFICA
SPECIFICASPECIFICA
HEADSET/All FH- and UH- models
Sensitivity .............. 104 dB re .0002 microbar @ 1000 Hz 1 mW
Frequency Response .......... 150-5,000 Hz + 5 dB in 6cc coupler
Impedance ............ 600 ohms nominal, 150 to 1200 ohm source
Weight ..................................................................................19 oz
Shielding ........................ Full floating shield w/independent gnd.
Noise Reduction Rating ...................................................... 24 dB
NOISE REDUCTION DATA
MEAN ATTENUATION IN dB 19.3 24.7 32.7 37.2 31.3 35.3 37.5 33.9 32.3
MEAN DEVIATION IN dB 3.1 4.1 3.5 2.5 2.9 3.6 3.7 3.7 4.4
NRR = 24
TIONSTIONS
TIONS
TIONSTIONS
INTERCOM
Size ..................... 7-3/8”L x 6-1/2”W x 2-3/8”H with mounting bracket
Weight .......................................................................................... 48 oz
Output ............................................... 375 milliwatts into each of up to
...................................... six 150 ohm headsets. Sound level remains
............... constant regardless of the number of headsets connected.
Power Requirements ........................ .016 amps, 12-24 VDC external
Fuse ......................................................... 1/2 amp fast blow type 3AG
MICROPHONE/Part No: A-7A
DC Bias Supply ..................... 8 to 16 volts, not polarity sensitive
Source Resistance .......................................... 220 to 2200 ohms
Output Voltage ............ 370 mV @ 114 dB spl re .0002 microbar
Frequency Response ...................... Optimized for speech clarity
Max. Amb. Noise Level ................. 125 dB spl re .0002 microbar
Weight ..................................................................................02 oz
125 250 500 1000 2000 3000 4000 6300 8000
Use this laboratory-derived data for comparison only. The amount of protection afforded in field
use is often significantly lower depending on how the headset is fitted and worn.
and noise reduction
One-YOne-Y
ear Limited Wear Limited W
One-Y
ear Limited W
One-YOne-Y
ear Limited Wear Limited W
Sonetics Corporation warrants to the original purchaser of its products, that they will be free from defects in materials and
workmanship, under normal and proper use, for the period of one year from date of purchase. Sonetics Corporation will repair
or replace, at its option, any parts showing factory defects during this warranty period, subject to the following provisions. This
warranty applies only to a new product which has been sold through authorized channels of distribution. All work under warranty
must be performed by Sonetics Corporation. All returned products must be shipped to our address, freight prepaid, accompanied by a dated proof of purchase. The purchaser voids this warranty if he or others attempt to repair, service or alter the product
in any way. This warranty does not apply in the event of accident, abuse, improper installation, unauthorized repair, tampering,
modification, fire, flood, collision, or other damage from external sources, including damage which is caused by user replaceable
parts (leaking batteries, etc.). This warranty does not extend to any other equipment or apparatus to which this product may be
attached or connected. The foregoing is your sole remedy for failure in service or defects. Sonetics Corporation shall not be
liable under this or any implied warranty for incidental or consequential damages, nor for any installation or removal costs or
other service fees. This warranty is in lieu of all other warranties, express or implied, including the warranty of merchantability or
fitness of use, which are hereby excluded. To the extent that this exclusion is not legally enforceable, the duration of such implied
warranties shall be limited to one year from date of purchase. No suit for breach of express or implied warranty may be brought
after one year from date of purchase.
arranty to Original Purchaserarranty to Original Purchaser
arranty to Original Purchaser
arranty to Original Purchaserarranty to Original Purchaser
10
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3000A
OPTIONS OPTIONS
OPTIONS
OPTIONS OPTIONS
Headsets:Headsets:
Headsets:
Headsets:Headsets:
FH-1:FH-1:
FH-1:
Headset with Radio Transmit PTT
FH-1:FH-1:
adjustable headset with 24dB noise reduction, liquid filled
ear seals, adjustable microphone boom, electret microphone and volume control.
FH-2:FH-2:
FH-2:
Intercom Only Headset
FH-2:FH-2:
jump seat positions.
UH-1:UH-1:
UH-1:
UH-1:UH-1:
corporates all the features of the standard Radio Transmit Headset/FH-1 Headset, but is specially designed for
wearing under the helmet.
UH-2:UH-2:
UH-2:
UH-2:UH-2:
rates all the features of the standard Jumpseat Headset/
FH-2 Headset, but is specially designed for wearing under the helmet.
FH-1S:FH-1S:
FH-1S:
FH-1S:FH-1S:
the Radio Transmit Headset/FH-1 except has only one
earphone with an over-the-head band.
FH-2:FH-2:
FH-2:
FH-2:FH-2:
Jumpseat Headset/FH-2 except has only one earphone
with an over-the-head band.
Under the Helmet Radio Transmit Headset
Under the Helmet Jumpseat Headset.
Single Ear Radio Transmit Headset.
Single Ear Jumpseat Headset.
andand
and
andand
ACCESSORIES ACCESSORIES
ACCESSORIES
ACCESSORIES ACCESSORIES
. A high quality
. Specially designed for
. In-
Incorpo-
Same as
Same as the
Consumable and Replacement ItemsConsumable and Replacement Items
Consumable and Replacement Items
Consumable and Replacement ItemsConsumable and Replacement Items
CC-1:CC-1:
CC-1:
Cloth Comfort Covers.
CC-1:CC-1:
bands which slip over the headphone ear seals providing comfort and hygiene for the wearer.
MM-1:MM-1:
MM-1:
Microphone Muff.
MM-1:MM-1:
microphone providing wind noise reduction.
A-7A:A-7A:
A-7A:
Replacement Microphone for all FH and UH se-
A-7A:A-7A:
ries headsets.
Cloth covers with elastic
A foam muff used over the
Headset Modules and AccessoriesHeadset Modules and Accessories
Headset Modules and Accessories
Headset Modules and AccessoriesHeadset Modules and Accessories
HM-1:HM-1:
HM-1:
Headset Module.
HM-1:HM-1:
for connecting headsets into the intercom system. Nonwaterproof.
PP-2:PP-2:
PP-2:
Pump Panel Headset Modules, waterproof.
PP-2:PP-2:
waterproof headset module designed for use in environments subject to weather and water spray. (Includes an
attached modular cable.)
CA*:CA*:
CA*:
Modular Cable.
CA*:CA*:
vide signal paths between a headset module and the Intercom Unit. Standard lengths include 6, 12, and 20 feet.
They may also be custom ordered to any length.
(* insert cable length in place of *.)
HE-15:HE-15:
HE-15:
HE-15:HE-15:
cord providing extended length between the headset
module and the headset.
FS-1:FS-1:
FS-1:
FS-1:FS-1:
handsfree transmit capability is desired.
HH-Series:HH-Series:
HH-Series:
HH-Series:HH-Series:
Check for availability of radio model interface.
Headset Extension, 15 foot coiled cord.
Heavy Duty PTT Foot Switch.
Hand-held Radio-to-headset Interface.
Provides a convenient location
A
Interconnect cables used to pro-
A coiled
Used when
11
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3000A
EXTENDED TROUBLESHOOTINGEXTENDED TROUBLESHOOTING
EXTENDED TROUBLESHOOTING
EXTENDED TROUBLESHOOTINGEXTENDED TROUBLESHOOTING
If Things Go WIf Things Go W
If Things Go W
If Things Go WIf Things Go W
The FIRECOM Apparatus Intercom System, when installed properly and adjusted according to specifications,
will perform to industry standards and offer you the finest
in hearing protection and enhanced communication.
However, occasionally you might experience a malfunction.
The following recommendations cover potential trouble
areas.
Find the symptom which you are experiencing and follow the trouble-shoot steps in the sequence given.
If the symptoms you are experiencing are not covered in
this document, call the FIRECOM Customer Service
Department at 1-800-527-0555.
Definitions:Definitions:
Definitions:
Definitions:Definitions:
Intercom unit 3000A Intercom with or without
Radio Interface Port 25 pin d sub jack on the rear of
Radio Interface Cable Cable which mates with the ra-
Intercom Port Any one of six modular jacks on
Intercom/Tx Port One of the three intercom ports
HM-1 Black plastic module with a
PP-2 A mic jack and a speaker jack
CA Cable Flat six conductor cable with six-
Headset Location Any combination of “CA” cables
rongrong
rong
rongrong
the DMR.
the intercom unit.
dio interface port.
the rear of the intercom unit.
capable of keying and transmitting over the apparatus radio
through the Radio Interface
Port.
speaker jack and a smaller microphone jack used to connect
headsets into the intercom system
in a water resistant enclosure.
wide modular plugs on each end
used to make connections between HM-1’s or PP-2’s and the
intercom unit
and HM-1’s or PP-2’s connected to a single port on the
rear of the intercom unit.
How to verify that a headset location has a badHow to verify that a headset location has a bad
How to verify that a headset location has a bad
How to verify that a headset location has a badHow to verify that a headset location has a bad
component and troubleshoot to either a badcomponent and troubleshoot to either a bad
component and troubleshoot to either a bad
component and troubleshoot to either a badcomponent and troubleshoot to either a bad
headset, bad cable or bad HM-1headset, bad cable or bad HM-1
headset, bad cable or bad HM-1
headset, bad cable or bad HM-1headset, bad cable or bad HM-1
(A) Examine the headset’s label to determine if the head-
set is a jumpseat type or a radio transmit type headset.
1. If the headset is a radio transmit type, the speakers should always be active. The mic should always be active. Pressing the red PTT button on
the eardome should key the radio only if that headset location is plugged into an intercom/tx port,
otherwise the PTT button will have no effect.
2. If the headset is a jumpseat type headset, the
speakers should always be active. The mic should
be active only when the black PTT button on the
eardome is pressed. The headset should never
cause the radio to key once installed in any headset location.
(B) Unplug the headset location from the intercom unit
and exchange intercom ports with a known good
headset location. If the headset fails to perform properly, the headset location has a faulty component
and you should continue troubleshooting the headset location
(C) Plug the headset into another good headset loca-
tion. If the headset fails to perform properly in the
new location, the headset is faulty and needs to be
repaired.
(D) If the headset is not at fault, check the HM-1 by ex-
changing it with a known good one from another
headset location, and checking for proper operation
of the headset location. Check the modular plug of
the HM-1 for bent or stuck pins. If the pins look
good and the HM-1 fails to perform properly, it will
need to be replaced.
(E) If the HM-1 is not at fault, check the intercom port
the headset location is connected to by plugging a
known good headset location into that port. If the
new headset location operates properly, the cable
of the original headset location is bad and will need
to be replaced. It is possible that the problem with
the cable will be at the modular connector and that a
new one could be crimped on and thus solve the
problem with the headset location. A modular cable
crimping tool is required to attach new modular ends.
12
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3000A
EXTENDED TROUBLESHOOTINGEXTENDED TROUBLESHOOTING
EXTENDED TROUBLESHOOTING
EXTENDED TROUBLESHOOTINGEXTENDED TROUBLESHOOTING
TT
roubleshooting an intercom system that hasroubleshooting an intercom system that has
T
roubleshooting an intercom system that has
TT
roubleshooting an intercom system that hasroubleshooting an intercom system that has
been working properly but has failedbeen working properly but has failed
been working properly but has failed
been working properly but has failedbeen working properly but has failed
(A)(A)
There is no sound in the headset from either in-There is no sound in the headset from either in-
(A)
There is no sound in the headset from either in-
(A)(A)
There is no sound in the headset from either in-There is no sound in the headset from either intercom or radio.tercom or radio.
tercom or radio.
tercom or radio.tercom or radio.
1. Check the headset location for proper orientation
and replace any faulty components.
2. If the headset location checks good, verify that
power is present at pin 20 and that ground is
present at pin 1 by verifying a voltage of at least
11.5 volts between those two pins. If power is
present the red LED on the intercom faceplate
will light when the toggle switch is in the RECORD
position (the green LED will always light on an
intercom without a DMR). If power is not present,
check the wiring to the intercom and any switches,
fuses, or circuit breakers in the power circuits to
the intercom and correct any faults.
3. If there is power to the intercom and it doesn’t
work, the intercom unit is bad. Remove it for repair. Contact
(B) There is no sound in the headset from the radio, but
the intercom is okay.
1. Verify that the receive audio is present by listening to the radio’s speaker. If there is no audio
from the radio’s speaker, disconnect the radio interface port connector from the back of the intercom unit. If there still is no audio from the radio’s
speaker, the radio or wiring is at fault.
2. If the radio is putting out receive audio, check the
connections to pins 13 and 21 of the intercom.
An open will cause no receive audio.
3. If no wiring fault is found, try swapping the intercom unit with a known good one to verify that the
problem is not the wiring. If no fault can be found
in the wiring, then the intercom unit is bad and
should be removed for repair.
(C)(C)
There is no sound in the headset from the inter-There is no sound in the headset from the inter-
(C)
There is no sound in the headset from the inter-
(C)(C)
There is no sound in the headset from the inter-There is no sound in the headset from the intercom, but the radio is okaycom, but the radio is okay
com, but the radio is okay
com, but the radio is okaycom, but the radio is okay
1. Verify that the headset location is good, replace
any faulty headset location components.
2. If the headset location checks good, the fault must
lie in the intercom unit. Remove it for repair.
(D)(D)
There is no sound in one earThere is no sound in one ear
(D)
There is no sound in one ear
(D)(D)
There is no sound in one earThere is no sound in one ear
1. The headset is faulty. Remove it for repair.
FIRECOMFIRECOM
FIRECOM
FIRECOMFIRECOM
for return authorization.
..
.
..
..
.
..
(E)(E)
YY
ou can hear others on the intercom but theyou can hear others on the intercom but they
(E)
Y
ou can hear others on the intercom but they
(E)(E)
YY
ou can hear others on the intercom but theyou can hear others on the intercom but they
cannot hear you.cannot hear you.
cannot hear you.
cannot hear you.cannot hear you.
1. If the headset is a jumpseat type headset, be sure
that the black PTT button is fully depressed when
trying to talk on the intercom.
2. Verify that the headset location is good. If it appears that the headset is the faulty component,
check the phillips head set screws on the mic element for proper tightness before removing the
headset for repair.
(F)(F)
YY
ou can’t hear others on the intercom but theyou can’t hear others on the intercom but they
(F)
Y
ou can’t hear others on the intercom but they
(F)(F)
YY
ou can’t hear others on the intercom but theyou can’t hear others on the intercom but they
can hear you.can hear you.
can hear you.
can hear you.can hear you.
1. Verify that the headset location is good. Replace
any faulty headset location components.
2. If the headset location checks good, the fault must
lie in the intercom unit. Remove it for repair.
(G)(G)
There is a loud squeal in the intercom systemThere is a loud squeal in the intercom system
(G)
There is a loud squeal in the intercom system
(G)(G)
There is a loud squeal in the intercom systemThere is a loud squeal in the intercom system
when intercom volume is turned up.when intercom volume is turned up.
when intercom volume is turned up.
when intercom volume is turned up.when intercom volume is turned up.
1. Check for an open mic too near the speakers of a
headset. Feedback problems are often fixed by
turning the intercom volume down, moving the mic
away from the headset speakers, or unplugging
the smaller jack on the headset’s com-cable when
not in use.
2. If the problem persists, unplug the headset locations one at a time from the rear of the intercom
unit until the squeal stops. Most likely there is a
short in that location’s cabling. The cable should
be unplugged from both its HM-1 and the intercom unit and checked for shorts between conductors. If any are found, the cable will need to
be replaced.
(H)(H)
The radio receive is weak.The radio receive is weak.
(H)
The radio receive is weak.
(H)(H)
The radio receive is weak.The radio receive is weak.
1. Check the setting of the radio’s volume control.
The radio’s volume control is the only adjustment
for receive audio level in the intercom systems.
2. Verify proper connection of radio interface pins
13 and 21.
3. If no fault is found and another intercom unit is
available, try swapping a known good intercom
with the suspect one. If the problem goes away,
the fault is in the suspect intercom unit. Remove
it for repair. If the problem persists, call
COM COM
COM technical support for assistance.
COM COM
FIRE-FIRE-
FIRE-
FIRE-FIRE-
13
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3000A
EXTENDED TROUBLESHOOTINGEXTENDED TROUBLESHOOTING
EXTENDED TROUBLESHOOTING
EXTENDED TROUBLESHOOTINGEXTENDED TROUBLESHOOTING
(I)(I)
The radio keys but has no transmitter audio (car-The radio keys but has no transmitter audio (car-
(I)
The radio keys but has no transmitter audio (car-
(I)(I)
The radio keys but has no transmitter audio (car-The radio keys but has no transmitter audio (carrier but no audio).rier but no audio).
rier but no audio).
rier but no audio).rier but no audio).
1. Verify radio interface pin 17 (transmit audio) for
proper connection.
2. If pin 17 is properly connected, verify that the transmit audio adjustment inside the intercom unit is
not set for zero output by setting it to mid-range.
3. If no fault is found and another intercom unit is
available, try swapping a known good intercom
with the suspect one. If the problem goes away,
the fault is in the suspect intercom unit. Remove
it for repair. If the problem persists, call
COM COM
COM technical support for assistance.
COM COM
(J)(J)
The radio doesn’t keyThe radio doesn’t key
(J)
The radio doesn’t key
(J)(J)
The radio doesn’t keyThe radio doesn’t key
1. Verify that the headset location is good. Replace
any faulty headset location components.
2. If the headset location checks good, verify proper
connection of radio interface pins 8 and 10.
3. If no fault is found and another intercom unit is
available, try swapping a known good intercom
with the suspect one. If the problem goes away,
the fault is in the suspect intercom unit. Remove
it for repair. If the problem persists, call
COM COM
COM technical support for assistance.
COM COM
(K)(K)
Alternator and/or strobe noise is present in trans-Alternator and/or strobe noise is present in trans-
(K)
Alternator and/or strobe noise is present in trans-
(K)(K)
Alternator and/or strobe noise is present in trans-Alternator and/or strobe noise is present in transmit audio onlymit audio only
mit audio only
mit audio onlymit audio only
1. Verify that radio interface pin 1 is connected to
mic low and all connections are clean and tight.
2. Verify that the intercom transmit audio level adjustment is not set too high. Too much gain here
will cause excessive background noise to be
transmitted along with the voice. In the worst case,
the voice will be somewhat distorted when transmitting from a quiet place and will become unreadable in the presence of background noise.
(L) Alternator and/or strobe noise is present in all(L) Alternator and/or strobe noise is present in all
(L) Alternator and/or strobe noise is present in all
(L) Alternator and/or strobe noise is present in all(L) Alternator and/or strobe noise is present in all
intercom audio.intercom audio.
intercom audio.
intercom audio.intercom audio.
1. Review the set up and operation of the intercom
volume and squelch controls. Possibly the intercom volume is set too high.
2. Inspect the headset microphones, making sure
that all the slots on both sides of the mic are clean
and unobstructed. Obstruction of these slots will
hamper the noise cancelling characteristics of the
mics.
3. Disconnect any exterior mounted headset locations. If the noise stops, inspect that location for
water or other contamination is present, contact
FIRECOMFIRECOM
FIRECOM
FIRECOMFIRECOM
..
.
..
for return of the unit.
..
.
..
FIRE-FIRE-
FIRE-
FIRE-FIRE-
FIRE-FIRE-
FIRE-
FIRE-FIRE-
(M)(M)
Engine noise and sirens are present in transmitEngine noise and sirens are present in transmit
(M)
Engine noise and sirens are present in transmit
(M)(M)
Engine noise and sirens are present in transmitEngine noise and sirens are present in transmit
audio.audio.
audio.
audio.audio.
1. Verify that the intercom transmit audio level adjustment is not set too high. Too much gain here
will cause excessive background noise to be
transmitted along with the voice. In the worst case,
the voice will be somewhat distorted when transmitting from a quiet place and will become unreadable in the presence of background noise.
(N)(N)
Intercom volume control has no effect.Intercom volume control has no effect.
(N)
Intercom volume control has no effect.
(N)(N)
Intercom volume control has no effect.Intercom volume control has no effect.
1. Call
(O)(O)
Intercom squelch has no effect.Intercom squelch has no effect.
(O)
Intercom squelch has no effect.
(O)(O)
Intercom squelch has no effect.Intercom squelch has no effect.
1. Call
(P)(P)
Cannot seem to set the squelch level (squelchCannot seem to set the squelch level (squelch
(P)
Cannot seem to set the squelch level (squelch
(P)(P)
Cannot seem to set the squelch level (squelchCannot seem to set the squelch level (squelch
is too touchy).is too touchy).
is too touchy).
is too touchy).is too touchy).
1. First review the set up and operation of the squelch
2. Call
(Q)(Q)
DMR does not workDMR does not work
(Q)
DMR does not work
(Q)(Q)
DMR does not workDMR does not work
1. Review proper operation of DMR switches
2. Call
(R)(R)
DMR has a noisy playback.DMR has a noisy playback.
(R)
DMR has a noisy playback.
(R)(R)
DMR has a noisy playback.DMR has a noisy playback.
1. Call
(S)(S)
DMR playback is weak.DMR playback is weak.
(S)
DMR playback is weak.
(S)(S)
DMR playback is weak.DMR playback is weak.
1. Call
FIRECOM FIRECOM
FIRECOM technical support for assistance
FIRECOM FIRECOM
or return authorization
FIRECOM FIRECOM
FIRECOM technical support for assistance
FIRECOM FIRECOM
or return authorization
control. Note that is important to speak in a loud
clear voice and keep the mic very close to the
speaker’s mouth.
FIRECOM FIRECOM
FIRECOM technical support for assistance
FIRECOM FIRECOM
or return authorization
FIRECOM FIRECOM
FIRECOM for return authorization.
FIRECOM FIRECOM
FIRECOM FIRECOM
FIRECOM for return authorization.
FIRECOM FIRECOM
FIRECOM FIRECOM
FIRECOM for return authorization.
FIRECOM FIRECOM
14
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3000A
EXTENDED TROUBLESHOOTINGEXTENDED TROUBLESHOOTING
EXTENDED TROUBLESHOOTING
EXTENDED TROUBLESHOOTINGEXTENDED TROUBLESHOOTING
Use this section to check out items identifiedUse this section to check out items identified
Use this section to check out items identified
Use this section to check out items identifiedUse this section to check out items identified
as bad before sending them out for repairas bad before sending them out for repair
as bad before sending them out for repair
as bad before sending them out for repairas bad before sending them out for repair
Bad headset:Bad headset:
Bad headset:
Bad headset:Bad headset:
Bad mic circuit -
1. Using a #0 phillips screwdriver, check that the set
screws in the mic element are snug.
2. Exchange mic elements with a working headset
to check that the mic element is not bad.
3. If neither of these solves the problem, call for a
return authorization and send the headset in for
repair.
Bad speaker or PTT circuit:Bad speaker or PTT circuit:
Bad speaker or PTT circuit:
Bad speaker or PTT circuit:Bad speaker or PTT circuit:
1. Send the headset in for repair.
..
.
..
Bad intercom:Bad intercom:
Bad intercom:
Bad intercom:Bad intercom:
1. Check all intercom ports for bent or stuck pins.
Bad HM-1 or PP-2:Bad HM-1 or PP-2:
Bad HM-1 or PP-2:
Bad HM-1 or PP-2:Bad HM-1 or PP-2:
1. Send HM-1 or PP-2 in for repair.
Bad CA CableBad CA Cable
Bad CA Cable
Bad CA CableBad CA Cable
1. If tools are available, try replacing the modular
plug on both ends of the CA cable. Note that
there is one correct way to assemble these cables.
The order of the wire colors must be opposite at
each end.
15
Page 18
Sonetics Corporation
7340 SW Durham Rd. • Portland, Oregon 97224
1-800/527-0555 • 503/684-6647
www.firecom.com • sales@firecom.com
©1995 Sonetics Corporation. All Rights Reserved. PRINTED IN U.S.A.
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