Kenwood TK-2400 User manual

INSTRUCTION MANUAL
B62-2478-20 (K)
VHF FM TRANSCEIVER
TK-2400
UHF FM TRANSCEIVER
TK-3400

THANK YOU
We are grateful for your purchase of this KENWOOD product
and welcome you to the Business Radio Service (BRS).
Your KENWOOD 2-way Business Radio is called a “transceiver”,
meaning “transmitter & receiver”. We believe this easy-to-
use transceiver will provide you with dependable and reliable
communications. This KENWOOD transceiver is a precision
device. Treat it with care, and you will enjoy years of reliable
operation.
FEATURES
• 4 (K type) or 16 (K2 type) channels with 27 VHF (TK-2400) or
90 UHF (TK-3400) operating frequencies and each channel
can be set up with a QT tone or DQT code allowing you to
ignore unwanted calls.
• Built in voice scrambler gives you complete privacy for your
conversations.
• Hands free operation when using an optional headset.
• Voice announcement lets you know which channel you have
selected and which settings you have made when reassigning
key functions and channel settings.
OPERATING CONDITIONS
Condition TK-2400 TK-3400
Open locations
(no obstructions) Up to 6 miles (9.6 km)
In steel/ concrete
reinforced buildings Up to 220,000 square feet (20,440 m2)Up to 250,000 square
feet (23,220 m2)
In high rises Up to 13 floors Up to 20 floors
Note: The listed ranges are based on field testing and may vary with
your operating conditions and individual transceiver.
© 2015

i
FCC LICENSE INFORMATION
Your KENWOOD transceiver operates on communications
frequencies which are subject to FCC (Federal
Communications Commission) Rules & Regulations. FCC
Rules require that all operators using Private Land Mobile
radio frequencies obtain a radio license before operating their
equipment. Application for license must be made on FCC form
601, schedules D and H, and Remittance form 159.
FAX: Forms can be obtained by fax from the FCC Fax-On-
Demand system. Call 1-202-418-0177 from your fax machine
and request document number 000601 for the form, schedules,
and instructions.
MAIL: Forms can be ordered by telephone, and will be sent to
you by first class mail. Call the FCC Forms Hotline at
1-800-418-FORM (1-800-418-3676).
INTERNET: Form 601 and instructions can be downloaded
from the FCC Forms website at
http://www.fcc.gov/formpage.html
Before filling out your Form 601 application Technical Data
section, you must decide on which frequencies you will operate.
See the frequency charts on pages 14 and 15.
QUESTIONS? Call the FCC for license application questions
at 1-888-CALL-FCC (1-888-225-5322).

ii
One or more of the following statements may be
applicable:
FCC WARNING
This equipment generates or uses radio frequency energy. Changes
or modifications to this equipment may cause harmful interference
unless the modifications are expressly approved in the instruction
manual. The user could lose the authority to operate this equipment if
an unauthorized change or modification is made.
INFORMATION TO THE DIGITAL DEVICE USER REQUIRED BY THE
FCC
This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can generate radio frequency
energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However,
there is no guarantee that the interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment
off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment to an outlet on a circuit different from that
to which the receiver is connected.
Consult the dealer for technical assistance.
ATTENTION:
The RBRC Recycle seal found on KENWOOD lithium-
ion (Li-ion) battery packs indicates KENWOOD’s
voluntary participation in an industry program to collect
and recycle Li-ion batteries after their operating life
has expired. The RBRC program is an alternative to
disposing Li-ion batteries with your regular refuse or in
municipal waste streams, which is illegal in some areas.
For information on Li-ion battery recycling in your area, call (toll free)
1-800-8-BATTERY (1-800-822-8837).
KENWOOD’s involvement in this program is part of our commitment to
preserve our environment and conserve our natural resources.

iii
Terminal Descriptions
Speaker/ Microphone Jacks
It is possible to use a resin-based cover for the Speaker/ Microphone jacks.
NO. Name Description Impedance I/O
1 PTT / RXD External PTT Input / Serial
Data Input CMOS I
2 MIC External MIC Input 1.8 kI
3 MICIN Internal MIC Output 1.8 kO
4 OPTDET External Option Detect High Impedance I
5 5M 5V Output 100 O
6 AE GND GND −
7 TXD Serial Data Output CMOS O
8 NC No Connection −−
9 SPO Audio Input 8 I
10 SPI Received Audio Output 8 O
Antenna Terminal
50 impedance
Battery Terminal
The battery terminal uses a spring plate.
The negative terminal connects to the chassis ground.
The battery is mounted on the rear side of the transceiver using a latch
mounting method.
Firmware Copyrights
The title to and ownership of copyrights for firmware embedded in
KENWOOD product memories are reserved for JVC KENWOOD
Corporation.

iv
NOTICES TO THE USER
◆Government law prohibits the operation of unlicensed radio
transmitters within the territories under government control.
◆Illegal operation is punishable by fine and/or imprisonment.
◆Refer service to qualified technicians only.
Safety: It is important that the operator is aware of, and
understands, hazards common to the operation of any
transceiver.
PRECAUTIONS
• Do not charge the transceiver and battery pack when they are wet.
• Ensure that there are no metallic items located between the
transceiver and the battery pack.
• Do not use options not specified by KENWOOD.
• If the die-cast chassis or other transceiver part is damaged, do not
touch the damaged parts.
• If a headset or headphone is connected to the transceiver, reduce
the transceiver volume. Pay attention to the volume level when
turning the squelch off.
• Do not place the microphone cable around your neck while near
machinery that may catch the cable.
• Do not place the transceiver on unstable surfaces.
• Ensure that the end of the antenna does not touch your eyes.
• When the transceiver is used for transmission for many hours, the
radiator and chassis will become hot. Do not touch these locations
when replacing the battery pack.
• Do not immerse the transceiver in water.
• Always switch the transceiver power off before installing optional
accessories.
• The charger is the device that disconnects the unit from the AC
mains line. The AC plug should be readily accessible.
• To dispose of batteries, be sure to comply with the laws and
regulations in your country or region.

v
Turn the transceiver power off in the following locations:
• In explosive atmospheres (inflammable gas, dust particles,
metallic powders, grain powders, etc.).
• While taking on fuel or while parked at gasoline service stations.
• Near explosives or blasting sites.
• In aircrafts. (Any use of the transceiver must follow the instructions
and regulations provided by the airline crew.)
• Where restrictions or warnings are posted regarding the use of
radio devices, including but not limited to medical facilities.
• Near persons using pacemakers.
• Do not disassemble or modify the transceiver for any reason.
• Do not place the transceiver on or near airbag equipment while
the vehicle is running. When the airbag inflates, the transceiver
may be ejected and strike the driver or passengers.
• Do not transmit while touching the antenna terminal or if
any metallic parts are exposed from the antenna covering.
Transmitting at such a time may result in a high-frequency burn.
• If an abnormal odor or smoke is detected coming from the
transceiver, switch the transceiver power off immediately,
remove the battery pack from the transceiver, and contact your
KENWOOD dealer.
• Use of the transceiver while you are driving may be against traffic
laws. Please check and observe the vehicle regulations in your
area.
• Do not expose the transceiver to extremely hot or cold conditions.
• Do not carry the battery pack (or battery case) with metal objects,
as they may short the battery terminals.
• Danger of explosion if the battery is incorrectly replaced; replace
only with the same type.
• When operating the transceiver in areas where the air is dry, it is
easy to build up an electric charge (static electricity). When using
an earphone accessory in such conditions, it is possible for the
transceiver to send an electric shock through the earphone and to
your ear. We recommend you use only a speaker/microphone in
these conditions, to avoid electric shocks.

vi
Information concerning the battery pack:
The battery pack includes flammable objects such as organic
solvent. Mishandling may cause the battery to rupture
producing flames or extreme heat, deteriorate, or cause other
forms of damage to the battery. Please observe the following
prohibitive matters.
• Do not disassemble or reconstruct battery!
The battery pack has a safety function and protection circuit to
avoid danger. If they suffer serious damage, the battery may
generate heat or smoke, rupture, or burst into flame.
• Do not short-circuit the battery!
Do not join the + and – terminals using any form of metal (such
as a paper clip or wire). Do not carry or store the battery pack in
containers holding metal objects (such as wires, chain-necklace or
hairpins). If the battery pack is short-circuited, excessive current will
flow and the battery may generate heat or smoke, rupture, or burst
into flame. It will also cause metal objects to heat up.
• Do not incinerate or apply heat to the battery!
If the insulator is melted, the gas release vent or safety function is
damaged, or the electrolyte is ignited, the battery may generate
heat or smoke, rupture, or burst into flame.
• Do not leave the battery near fire, stoves, or other heat
generators (areas reaching over 80°C/ 176°F)!
If the polymer separator is melted due to high temperature, an
internal short-circuit may occur in the individual cells and the
battery may generate heat or smoke, rupture, or burst into flame.
• Do not immerse the battery in water or get it wet by other
means!
If the battery’s protection circuit is damaged, the battery may
charge at extreme current (or voltage) and an abnormal chemical
reaction may occur. The battery may generate heat or smoke,
rupture, or burst into flame.
• Do not charge the battery near fire or under direct sunlight!
If the battery’s protection circuit is damaged, the battery may
charge at extreme current (or voltage) and an abnormal chemical
reaction may occur. The battery may generate heat or smoke,
rupture, or burst into flame.

vii
• Use only the specified charger and observe charging
requirements!
If the battery is charged in unspecified conditions (under high
temperature over the regulated value, excessive high voltage or
current over regulated value, or with a remodeled charger), it may
overcharge or an abnormal chemical reaction may occur. The
battery may generate heat or smoke, rupture, or burst into flame.
• Do not pierce the battery with any object, strike it with an
instrument, or step on it!
This may break or deform the battery, causing a short-circuit. The
battery may generate heat or smoke, rupture, or burst into flame.
• Do not jar or throw the battery!
An impact may cause the battery to leak, generate heat or smoke,
rupture, and/or burst into flame. If the battery’s protection circuit
is damaged, the battery may charge at an abnormal current (or
voltage), and an abnormal chemical reaction may occur. The
battery may generate heat or smoke, rupture, or burst into flame.
• Do not use the battery pack if it is damaged in any way!
The battery may generate heat or smoke, rupture, or burst into
flame.
• Do not solder directly onto the battery!
If the insulator is melted or the gas release vent or safety function
is damaged, the battery may generate heat or smoke, rupture, or
burst into flame.
• Do not reverse the battery polarity (and terminals)!
When charging a reversed battery, an abnormal chemical reaction
may occur. In some cases, an unexpected large amount of current
may flow upon discharging. The battery may generate heat or
smoke, rupture, or burst into flame.
• Do not reverse-charge or reverse-connect the battery!
The battery pack has positive and negative poles. If the battery
pack does not smoothly connect with a charger or operating
equipment, do not force it; check the polarity of the battery. If the
battery pack is reverse-connected to the charger, it will be reverse-
charged and an abnormal chemical reaction may occur. The
battery may generate heat or smoke, rupture, or burst into flame.

viii
• Do not touch a ruptured and leaking battery!
If the electrolyte liquid from the battery gets into your eyes, wash
your eyes with fresh water as soon as possible, without rubbing
your eyes. Go to the hospital immediately. If left untreated, it may
cause eye-problems.
• Do not charge the battery for longer than the specified time!
If the battery pack has not finished charging even after the
regulated time has passed, stop it. The battery may generate heat
or smoke, rupture, or burst into flame.
• Do not place the battery pack into a microwave or high
pressure container!
The battery may generate heat or smoke, rupture, or burst into
flame.
• Keep ruptured and leaking battery packs away from fire!
If the battery pack is leaking (or the battery emits a bad odor),
immediately remove it from flammable areas. Electrolyte leaking
from battery can easily catch on fire and may cause the battery to
generate smoke or burst into flame.
• Do not use an abnormal battery!
If the battery pack emits a bad odor, appears to have different
coloring, is deformed, or seems abnormal for any other reason,
remove it from the charger or operating equipment and do not use
it. The battery may generate heat or smoke, rupture, or burst into
flame.

1
CONTENTS
UNPACKING AND CHECKING EQUIPMENT.......................... 1
PREPARATION .......................................................... 2
ORIENTATION ........................................................... 6
BASIC OPERATIONS ................................................... 8
VOICE OPERATED TRANSMISSION (VOX) .......................... 9
BACKGROUND OPERATIONS ........................................10
CHANNEL SETUP MODE.............................................. 11
KEY ASSIGNMENT MODE ............................................20
TROUBLESHOOTING GUIDE .........................................25
ALL RESET MODE.....................................................26
UNPACKING AND CHECKING EQUIPMENT
Carefully unpack the transceiver. If any of the items listed
below are missing or damaged, file a claim with the carrier
immediately.
SUPPLIED ACCESSORIES
• Antenna ..................................................................................1
• Battery charger/ AC adapter (KSC-35S) ................................1
• Li-ion Battery pack (KNB-45L)................................................1
• Speaker/ microphone jack cover ............................................1
• Speaker/ microphone locking bracket.....................................1
• Belt clip (KBH-10)...................................................................1
• Screw (M3 x 8 mm)..................................................................2
• Warranty card .........................................................................1
• Instruction manual ..................................................................1
Note: Refer to "PREPARATION" for accessory installation
instructions.

2
PREPARATION
INSTALLING THE ANTENNA
Antenna Screw the antenna into the connector on
the top of the transceiver by holding the
antenna at its base and turning it clockwise
until secure.
Note: The antenna is neither a handle, a
key ring retainer, nor a speaker/ microphone
attachment point. Using the antenna in these
ways may damage the antenna and degrade
your transceiver’s performance
INSTALLING/ REMOVING THE BATTERY PACK
◆Do not short the battery terminals or dispose of the battery by fire.
◆Never attempt to remove the casing from the battery pack.
1Align the battery pack with the
back of the transceiver, then
press the battery pack and
transceiver firmly together until
the release latch on the base of
the transceiver locks.
2To remove the battery pack, lift
the safety catch on the base of
the transceiver, then press the
release latch underneath the
safety catch.
3While pressing the release latch,
pull the battery pack away from
the transceiver.

3
CHARGING THE BATTERY PACK
The battery pack is not charged at the factory; charge it before
use. Average battery pack life (calculated using 5% transmit
time, 5% receive time, and 90% standby time) is 17 hours.
ATTENTION: Always switch OFF a transceiver equipped with a
battery pack before inserting the transceiver into the charger.
1Plug the AC adapter cable into the jack located on the rear
of the charger.
2Plug the AC adapter into an AC outlet.
3Slide a battery pack or a transceiver equipped with a battery
pack into the charging slot of the charger.
• Make sure the metal contacts of the battery
pack mate securely with the charger
terminals.
• The indicator lights red and charging
begins.
4When charging is completed, the indicator lights green.
Remove the battery pack or the transceiver from the
charging slot of the charger.
• It takes approximately 3 hours to charge the battery pack.
• When the charger will not be used for a long time, unplug the AC
adapter from the AC outlet.
Note:
◆When the indicator blinks red, the battery pack is either
defective or the battery pack contacts are not properly mated
with those of the charger.
◆When the indicator flashes green and orange, the battery pack
has not satisfied the charging start temperature. Remove the
battery pack from the charger and wait until it reaches a normal
temperature before charging it again.
◆The ambient temperature should be between 41°F and 104°F
(5°C and 40°C) while charging is in progress. Charging outside
this range may not fully charge the battery.
◆The battery pack life is over when its operating time decreases even
though it is fully and correctly charged. Replace the battery pack.
Indicator

4
INSTALLING THE BELT CLIP
If necessary, attach the belt clip using
the two supplied M3 x 8 mm screws.
Note: If the belt clip is not installed, its
mounting location may get hot during
continuous transmission or when left
sitting in a hot environment.
Do not use glue which is designed to prevent screw loosening when
installing the belt clip, as it may cause damage to the transceiver.
Acrylic ester, which is contained in these glues, may crack the
transceiver’s back panel.
INSTALLING THE CAP OVER THE SPEAKER/
MICROPHONE JACKS
Install the cap over the speaker/ microphone jacks when not
using an optional speaker/ microphone.
Note: To keep the transceiver water resistant, you must cover the
speaker/ microphone jacks with the supplied cap.
1Place the cap over the jacks so that the locking tabs
insert into the transceiver grooves.
2While holding the cap in place, push it towards the
bottom of the transceiver until the tabs on the cap click
into place.
• To remove the cap, hold the top of the cap in place
with your finger while inserting a
2 mm or smaller flat blade screwdriver under the
bottom of the cap. Slowly slide the screwdriver
in until its tip touches the tab inside the cap, then
gently pry the cap up (handle of screwdriver
moving away from the transceiver) to remove the
cap.
Belt clip

5
INSTALLING THE OPTIONAL SPEAKER/ MICROPHONE
(OR HEADSET)
Note: The transceiver is not fully water resistant when using a
speaker/ microphone or headset.
1 Insert the speaker/ microphone (or
headset ) plugs into the speaker/
microphone jacks of the transceiver.
2Place the locking bracket over the
speaker/ microphone (or headset) plugs
so that the locking tabs insert into the
transceiver grooves.
• Push down on the locking bracket to
slide it into place.
3While holding the locking bracket in
place, push it towards the bottom of the
transceiver until the tabs on the bracket
click into place.
• To remove the locking bracket, push
the bracket up from the base.

6
ORIENTATION
Channel selector
Rotate to change the operating channel.
• To change the operating frequency or QT/DQT settings of a
channel, refer to “CHANNEL SETUP MODE” on page 11.
LED indicator
For the LED indicator status, refer to page 8.
Power switch/ Volume control
Turn clockwise to switch the transceiver ON. To switch the
transceiver OFF, turn counterclockwise until a click sounds.
Rotate to adjust the volume level.
PTT (Push to Talk) switch
Press and hold, then speak around the microphone area to
transmit.
Battery pack
Antenna
Microphone Speaker

7
Side 1 key
Press to activate its programmable function.
The default setting is [None] (no function).
• For function descriptions and details on how to change the
function of the Side 1 key, refer to “KEY ASSIGNMENT MODE”
on page 20.
Side 2 key
Press to activate its programmable function.
The default setting is [None] (no function).
• For function descriptions and details on how to change the
function of the Side 2 key, refer to “KEY ASSIGNMENT MODE”
on page 20.
Speaker/ microphone jacks
Insert the Speaker/ microphone or Headset plug into this
jack.

8
BASIC OPERATIONS
1Turn the Power switch/ Volume control
clockwise to switch the transceiver power
ON.
• The LED indicator lights blue for 1 second
when turning the Power ON.
2Rotate the Channel selector to select your
desired channel.
• When you receive an appropriate signal, you
will hear audio from the speaker. Adjust the
volume as necessary.
3To make a call, press and hold the PTT
switch, then speak around the microphone
area using your normal speaking voice.
• Hold the microphone approximately 1.5 inches
(3 to 4 cm) from your lips.
4Release the PTT switch to receive.
Note: When the battery pack voltage becomes too
low, the Low Battery Warning sounds an alert tone
every 30 seconds and the LED indicator blinks red.
LED Indicator Status
Indicator Color Meaning
Lights red Transmitting
Lights green Receiving a call
Blinks red Battery power is low while transmitting
Blinks green Scanning
Blinks red/orange The selected channel has not been
programmed and cannot be used.

9
VOICE OPERATED TRANSMISSION (VOX)
VOX operation allows you to transmit hands-free. VOX can
only be used if you are using a supported headset. This
function can be turned off for specific channels.
To activate VOX and set the VOX Gain level, perform the
following steps:
1Connect the headset to the transceiver .
• The VOX function does not activate when a headset is not
connected to the accessory terminal of the transceiver.
2With the transceiver power OFF, press and hold the Side 1
key while turning the transceiver power ON.
3Continue to hold the Side 1 key until a beep sounds.
• The LED indicator lights turn orange.
• When the Side 1 key is released, the transceiver will announces
the VOX Gain level (the default level is OFF, so, a double beep
sounds).
4Press the Side 1 key to select the VOX Gain level of the radio
(from 1~10 or Off).
• Press the Side 2 key to enable or disable the VOX function for
the current channel (you can change this setting for each channel
by selecting a channel with the Channel selector). When turned
ON, a beep sounds. When turned OFF, a double beep sounds.
5Press the PTT switch to save the setting.
• A beep will sound.
• The transceiver announces the new VOX Gain level.
6Turn the transceiver power OFF and then ON again to
activate VOX.
Note:
◆The transceiver will automatically return to normal operation if
no action is performed for 20 seconds.
◆VOX Gain level 1 is the least sensitive and VOX Gain level 10 is
the most sensitive.
◆If a headset is connected to the transceiver while the VOX
function is switched ON and the VOX Gain level is configured
to a higher, more sensitive level, louder received signals may
cause the transceiver to start transmission.

10
BACKGROUND OPERATIONS
TIME-OUT TIMER (TOT)
The Time-out Timer prevent callers from using a channel for an
extended duration (60 seconds). If you continuously transmit
for the duration, transmission will stop and an alert tone will
sound. To stop the tone, release the PTT switch.
LOW BATTERY WARNING
While operating the transceiver, the Low Battery Warning
sounds an alert tone every 30 seconds and the LED indicator
blinks red when the battery needs recharged or replaced.