Kenwood TK-3140 Service Manual

UHF FM TRANSCEIVER

TK-3140

SERVICE MANUAL

E · E3 versions

Knob (PTT)
(K29-9131-03)

Key top
(SW1,SW2)
(K29-9132-03)

Helical antenna
(T90-0798-05):E
(T90-0800-05):E3

Knob (ENC)
(K29-9134-03)

Knob (VOL)
(K29-9133-03)

© 2002-5 PRINTED IN JAPAN

B51-8631-00 (S) 582

CONTENTS

GENERAL ............................................................ 2

SYSTEM SET-UP ................................................ 2

OPERATING FEATURES .................................... 3

REALIGNMENT................................................. 13

CIRCUIT DESCRIPTION .................................... 17

SEMICONDUCTOR DATA ................................ 23

COMPONENTS DESCRIPTION ........................ 24

PARTS LIST....................................................... 25

EXPLODED VIEW.............................................. 34

PACKING ........................................................... 35

ADJUSTMENT .................................................. 36

TERMINAL FUNCTION..................................... 48

PC BOARD VIEWS

TX-RX UNIT (X57-6412-XX) (B/3),(C/3) ..... 49

TX-RX UNIT (X57-6412-XX) (A/3) .............. 53

SCHEMATIC DIAGRAM.................................... 59

BLOCK DIAGRAM............................................. 63

LEVEL DIAGRAM.............................................. 65

KSC-25,KNB-24L,KNB-25A,KNB-26N .............. 66

KBP-5,KMC-25................................................... 67

SPECIFICATIONS........................... BACK COVER

Packing
(4 keys)
(G53-1540-12)

Cabinet assy
(4 keys)
(A02-3653-14)

TK-3140

GENERAL / SYSTEM SET-UP

INTRODUCTION

SCOPE OF THIS MANUAL

This manual is intended for use by experienced technicians
familiar with similar types of commercial grade
communications equipment. It contains all required service
information for the equipment and is current as of the
publication date. Changes which may occur after publication
are covered by either Service Bulletins or Manual Revisions.
These are issued as required.

PERSONNEL SAFETY

The following precautions are recommended for personnel

safety:

●

DO NOT transmit until all RF connectors are verified secure
and any open connectors are properly terminated.

●

SHUT OFF and DO NOT operate this equipment near
electrical blasting caps or in an explosive atmosphere.

●

This equipment should be serviced by a qualified technician only.

ORDERING REPLACEMENT PARTS

When ordering replacement parts or equipment information,
the full part identification number should be included. This
applies to all parts : components, kits, or chassis. If the part
number is not known, include the chassis or kit number of
which it is a part, and a sufficient description of the required
component for proper identification.

SYSTEM SET-UP

Merchandise received

Choose the type of transceiver

Transceiver programming

A personal computer (IBM PC or compatible), programming
interface (KPG-36), and programming software (KPG-74D (M2))
are required for programming.
(The frequency, conventional system features, TX power HI/LOW,
and signalling data are programmed for the transceiver.)

SERVICE

This radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and alignment
procedures contained within.

Frequency range (MHz) RF power Type

TX/RX 440~470
TX/RX 400~430

4.0W

4.0W

TK-3140 E
TK-3140 E3

Are you using the speaker microphone?

NO

Delivery

2

YES

KMC-25

Speaker microphone

(Option)

OPERATING FEATURES

TK-3140

1. Operation Features

The TK-3140 is a UHF FM Radio designed in both 5tone
Model and DTMF/2tone/DMS Model. The programmable
features are summarized.

This transceiver can handle up to 250 groups with 250
channels in each group.

Model 5Tone Basic

Full
Full (Special Setting)

DTMF/2tone/DMS

1-1. 5tone Model

In this model, you can program Basic or Full level features.
When you select Basic level, only 1frame 5tone can be
programmed, and various functions are limited.
When you select “Special setting” in the Full Level, you
can use Encode/Decode format. Using Encode/Decode
format, you can further program the transceiver to run the
script.

1-2. DTMF/2tone/DMS Model

You can use Option signalling which is DTMF or 2tone(only
for Decode) or DMS(Digital Message System -FFSK
signalling) for every channel.

2 Rotary encoder

Rotate this encoder to activate its programmable function:
Channel Up/ Down (default) or Group Up/ Down. For further
details, contact your dealer.

3 POWER switch/ VOLUME control

Turn clockwise to switch ON the transceiver. Rotate to
adjust the volume. Turn counterclockwise fully to switch
OFF the transceiver.

4 LED indicator

This LED lights red during transmission and green while
receiving a signal. During Selective Call Alert, the LED
flashes orange. If programmed by your dealer, when the
battery pack power is low, the LED flashes red during
transmission. Replace or recharge the battery pack at this
time.

5 Auxiliary (orange) key

Press to activate its auxiliary function.
This key has no default setting.

6 Battery pack safety catch

Flip this catch to prevent accidentally pressing the battery
pack release latch.

2. Transceiver Controls and Indicators

2-1. Physical Layout

16

8

9

10

Microphone Speaker

2-2. Panel controls

The key on the top and front panel is momentary-type push
buttons. The functions of these keys and knob are explained
below.

1 Antenna connector

Connect the antenna here.

32

4

57

11
12
13
14

15

7 Battery pack release latch

Press this latch to release the battery pack.

8 PTT (Push-To-Talk) switch

Press this switch, then speak into the microphone to call a
station.

9 Side 1 key

Press to activate its auxiliary function. The default setting
of this key is Monitor.

0 Side 2 key

Press to activate its auxiliary function. The default setting
of this key is Call 1 for the 5-Tone model. The DTMF/2­Tone/DMS model has no default setting.

- S key

Press to activate its auxiliary function. The default setting
of this key is Selcall Entry for the 5-Tone model. The DTMF/
2-Tone/DMS model has no default setting.

= A key

Press to activate its auxiliary function. The default setting
of this key is Receive Entry for the 5-Tone model. The DTMF/
2-Tone/DMS model has no default setting.

3

TK-3140

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OPERATING FEATURES

~ 2 B keys

Press to activate its auxiliary function. This key has no default
setting.

! C 3 keys

Press to activate its auxiliary function. This key has no default
setting.

@ Universal connector

Connect the (optional KMC-25) speaker/ microphone here.
Otherwise, keep the supplied cover in place.

2-3. Programmable keys

Keys 2, 5, and 9 to ! {pages 3 to 4} can be programmed
with the auxiliary functions listed in the following table. The
keys can only be programmed with functions, depending on
the model purchased. Please contact your dealer for further
details on these functions.

1

To access these functions, press and hold the appropriate
key for more than 1 second.

2

These functions can be programmed only on key 2, the
encoder.

3

This function can be programmed only on key 5, the
Auxiliary (orange) key, and on the programmable function
key of the optional KMC-25 speaker/ microphone.

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■ Auto Dial

To transmit the stored DTMF code automatically.
Press the [Auto Dial] key to enter the “Auto Dial Mode”.
Select the desired number to send. It is used the selector

knob to select.

Press the [Auto Dial] key to transmit the numbers.

■ Channel Name

Press this key to switch between the “Channel Name” and
“Grp#/Ch#” for the display. If no channel name is programmed,
the transceiver automatically displays the group#/channel#.

■ Channel Up/Down

When this key is pressed each time, the channel number
to be selected is increased/decreased. If the “Hold” option
(Continuous Up/ Down operation) in the Key Assignment
window of the FPU is selected, press and hold the channel
Up or Down key for more than 1 second to repeat the operation
continuously. If you select the “Hold Delay” options in the
Key Assignment window of the FPU, the hold delay time can
be programmed. Although the default hold time is 3000 ms,
you can adjust the time between 100 and 5000 ms.

■ Call 1 to 6 (5tone)

Press the [CALL #] key to transmit the 5tone code that is
programmed to “Call #” in the System Parameters.

■ Emergency Call

Pressing this key causes the transceiver to enter the
emergency mode. The transceiver jumps to the programmed
“Emergency group/channel” and transmits for programmed
“Duration of Transmission time”.

The transceiver disables mic mute while transmitting. After
finishing transmission, the transceiver receivers for
programmed “Duration of Receiving”. The transceiver mutes

OPERATING FEATURES

TK-3140

the speaker while receiving. Following the above sequence,
the transceiver continues to transmit and receive.

You can select whether or not the emergency ID is

transmitted in the emergency mode.

■ Fixed Volume

This function is used for changing the volume level, it is
Power on Tone, Control Tone, Warning Tone, Alert Tone, AF
Volume Type.

If these Tone is set up in “Fixed”, the Tone level can be
changed when [Fixed Volume] key is pressed.

When [Fixed Volume] key is pressed, Tone level changes
in turn to Low (Tone Volume Low), High (Tone Volume High)
and Off.

■ Group Up/Down

When this key is pressed each time, the group number to
be selected is increased/decreased. If the “Hold” option
(Continuous Up/ Down operation) in the Key Assignment
window of the FPU is selected, press and hold the Group Up
or Down key for more than 1 second to repeat the operation
continuously. If you select the “Hold Delay” options in the
Key Assignment window of the FPU, the hold delay time can
be programmed. Although the default hold time is 3000 ms,
you can adjust the time between 100 and 5000 ms.

■ Home Channel

Press this key once, the channel switches to the pre­programmed home channel.

■ Key Lock

Key Lock prevents accidental operation of the transceiver.
When Key Lock is activated, all keys other that PTT,
Emergency, Monitor, Monitor Momentary, Shift, Squelch,
Squelch Momentary, Lamp, Volume are locked.

“LOCKED” appears momentarily when the Key Lock key
is pressed.

■ Lamp

Press the [Lamp] key to toggle the display backlight ON or
OFF. The backlight automatically turns OFF approximately 5
seconds after it is switched ON.

Press any key other than [Lamp] while the backlight is ON
to reset the 5-second timer. The timer will reset and the
backlight will remain on for 5 seconds.

■ Low Power

When you press this key, “LO” appears and the transceiver
switches to RF Low Power.

If you press this key while “LO” is displayed, the Power
status reverts to the preset default setting. If “TX Power” is
set to ‘Low Power’, no change occurs.

■ Monitor

●

Model = DTMF/2tone/DMS:

When this key pressed once, “MON” icon lights and
squelch unmutes if a carrier is present, regardless of the
specified Signalling (including Option Signalling).
If pressed again, “MON” icon goes off and squelch mutes.

●

Model = 5tone:

Depend on Monitor Function and Monitor Key Action in
the System Parameters.
You can select either QT/DQT or 5tone decoding to be
canceled when Monitor key is pressed.
When Monitor function is activated, “MON” icon appears.

■ Monitor Momentary

●

Model = DTMF/2tone/DMS:

While pressing this key, “MON” appears and the squelch
unmutes if a carrier is present, regardless of the specified
Signalling (including Option Signalling).
If released, “MON” disappears, and the squelch mutes.

●

Model = 5tone:

Depend on Monitor Function in the System Parameters.
You can select either QT/DQT or 5tone decoding to be
canceled while pressing Monitor key.
When Monitor function is activated, “MON” icon appears.

■ Operator Selectable Tone

When this key is pressed, the “OST” appears and Encode/
Decode QT/DQT is switched to the OST Tone pair. If pressed
again, the “OST” display goes off and Encode/Decode QT/
DQT returns to transceivers pre-set.

When this key is held down for 1 sec, the transceiver enters
“OST Select Mode”. In this mode, the display shows OST No.
or OST Name which is set to the channel and operator can select
one of OST Tone pair using, the selector knob.

If pressed this key again, the displayed OST code is memorized
to the channel, the transceiver exits from the OST Select Mode,
returns to normal channel display and “OST” display.

38 kinds of OST Tone pairs can be programmed in the
Operator Selectable Tone window.

While in the OST Select mode, the transceiver does not
look back at the priority channel in the scan resume mode.

■ Queue

Press [Queue] key to toggle Queue mode ON or OFF.

When it is ON, you will see the contents of the Queue
buffer. You can scroll the Queue buffer using the selector
knob.

When you are in Queue mode, [C] key to toggle the Selcall
and Status displays.

When you are in Queue mode, press the [B] key to toggle
the Code and Selcall/Status displays.

Hold down the [C] key to delete the top stack of the Queue
buffer.

Hold down the [B] key to cancel Queue mode and return to
normal operation.

5

TK-3140

OPERATING FEATURES

■ Radio Password

Back up is done even if the power supply is cut off.

A lock isn’t canceled unless a proper password is inputted.
The character which can be inputted is to 6 digits with the
number of 0 - 9. A lock is canceled if it is the same as Code
set up at “Optional Feature - Radio Password”.

If the entered Radio Password is incorrect, the “Key Input
Error Tone” sounds and the transceiver remains in “LOCK 1”
screen.

■ Receive Entry (5tone)

Press [Receive Entry] key to enter the desired Selcall code
you want to receive.

This function can be activated only when “RX Address” is
set to the channel and “Selectable Receive Digit” has been
entered.

When you enter Receive Entry mode, the “RX Address”
number appears on the LCD.

You use the channel selector to select the number. Then
press [B] key to enter the selected number. The selected digit
will shift left to enter the next digit.

Press [C] key to move the cursor 1 position right.

Hold down [C] key to clear the entered number.

■ Scan

Press the [Scan] key to toggle scanning the channels ON
and OFF. When the transceiver is scanning, “Revert CH
Display” is temporary disabled and the SCN icon and “-SCAN-”
appear.

■ Scan Delete/Add

Press the [Scan Del/Add] key to temporarily delete or add
each channel from/to the SCAN list.

When a channel is added to the SCAN list, (∞) appears on
LCD.

When the transceiver exits SCAN mode, the added or
deleted channels are erased from the SCAN list.

The original SCAN list is restored.

■ Selcall Entry (5tone)

Press [Selcall Entry] key to enter the desired Selcall code
you want to call.

This function can be activated only when “TX Address” is
set to the channel and “Selectable Selcall Digit” has been
entered. When you enter Selcall Entry mode, the “TX Address”
number appears on the LCD.

■ Selcall List

Press [Selcall List] key to enter Selcall List mode.

●

Model = 5tone:

Select the check box of “Selectable Selcall Digit”. The

number of digit you selected in “Selcall List” will be

displayed on LCD. If “Selcall List” has not been

programmed, same digits of Selcall List code that you

checked as “Selectable Selcall” digits will appear on LCD.

●

Model = DTMF/2tone/DMS:

The ID List code of DMS will appear on LCD.

To select the Selcall List, use the selector knob.

■ Selcall+Status Entry

Select the selcall number you wish to call.
Press [Selcall + Status Entry] key to enter “Selcall Entry

Mode”.

If you press [Selcall + Status Entry] key again, it works as

“Status Entry Mode”.

■ Selcall+Status List

Select the selcall number you wish to call.
Press [Selcall + Status List] key to enter “Selcall List Select Mode”.
If you press [Selcall + Status List] key again, it works as

“Status List Select Mode”.

■ Single Tone (1750Hz)/Single Tone (2135Hz)

While [Single Tone (1750Hz)] key is pressed and held, the

1750Hz tone is transmitted.

While [Single Tone (2135Hz)] key is pressed and held, the

2135Hz tone is transmitted.

■ Shift

It allows you to enable [Shift + Function] key access. When

[Shift] key is pressed, SFT appears on LCD.

■ Squelch Level

Press [Squelch Level] key to enter “Squelch Level

Adjustment Mode”.

The squelch level can be adjusted by the selector knob.
Press [Squelch Level] key again to store the adjusted

squelch level.

■ Squelch Momentary

Press [Squelch Momentary] key to force the squelch
unmute. “MON” icon appears on LCD and BUSY LED (Green)
lights.

If released, the squelch unmutes and “MON” disappears.
Also, BUSY LED (Green) goes off.

■ Squelch Off

Press [Squelch Off] key to force the squelch unmute.
“MON” icon appears on LCD and BUSY LED (Green) lights. If
the key is pressed again, the squelch unmutes and “MON”
disappears. Also, BUSY LED (Green) goes off.

■ Status Entry (5tone)

It allows the operator to input the status and transmit it to
the base station.

Both TX Address and “Selectable Status Digit” must be
programmed to perform the operation.

Press [Status Entry] key to access Status Entry mode.

“TX Address” of the channel appears on LCD.

6

OPERATING FEATURES

TK-3140

Selector knob to select the desired number and press [B]

key to enter. The cursor moves to next position.

■ Status List (5tone)

Press [Status List] key to enter Status List mode.

Select the check box of “5tone - System Parameters ­Selectable Status Digit”. The number of digit you selected in
“5tone - Status List” will be displayed on LCD. If “Status List”
has not been programmed, same digits of Status List code that
you checked as “Selectable Status” digits will appear on LCD.

To select the Status List, use the selector knob.

■ Talk Around

When Talk Around function is activated, “TA” appears and
the transceiver transmits on the receive frequency, using
receiver’s QT/DQT code.

The operator can call the other party directly (without
repeater).

■ None

When you press this key, the transceiver emits the “Key
Input Error Tone” (no function is performed).

2-4. Display

3. Scan Operating

1) Scan types

●

Single Group Scan

You can scan all valid (ADD) channels in the displayed group

that can be selected with the group selector.

●

Multiple Group Scan

You can scan all valid (ADD) channels in the all valid (ADD)

group.

2) Scan Start Condition

One or more non-priority channels must be added to all
channels that can be scanned. The transceiver must be in
normal receive mode (PTT off).

When you activate the key programmed to the scan
function, the scan starts. The scan icon “SCN” lights and
“-SCAN-” or revert channel (programmable) is indicated on
alphanumeric display.

3) Scan Stop Condition

The scan stops temporarily if the following conditions are
satisfied.
1 A carrier is detected, then signalling matches on channels

for which receive the signalling is set by the programming
software.

2 A carrier is detected on the channel for which receiving

signalling is not set by the programming software or when
the monitor (signalling cancel) function is activated.

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1 Priority channel is the most important channel for the scan,

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stops temporarily.

2 Non-priority channels detects a signal during scan. For the

channels that can be selected with the group or channel
selector when the scan does not occur, adds an indicator
(∞) lights.

5) Priority Channel Setting

A priority channel can be set as follows with the
programming software (KPG-74D (M2)).

1 Specify a priority channel as a fixed priority channel.
2 Make a selected channel a priority channel.

6) Scan Type According to the Priority Channel

1 When no priority channel is set : Only the non-priority

channels are scanned.

If a non-priority channel stops temporarily, it stops until

there is nosignal on the channel.

2 When priority channel is set : Either priority channel is

scanned.

If a non-priority channel stops temporarily, a priority channel

signal is detected at certain intervals.

If a priority channel stops temporarily, it stops until there

is no signal on the priority channel.

7

TK-3140

OPERATING FEATURES

7) Revert Channel

The revert channel is used to transmit during scanning and
set by the programming software (KPG-74D (M2)).
1 Priority

The transceiver reverts to the priority channel.

2 Priority with talkback

The transceiver reverts to the priority channel.

If you press PTT during a resume timer (dropout delay time,
TX dwell time) or calling, you can transmit on current
channel to answer to the call however revert channel is
set to priority channel.

After resume time, scan re-starts and transmission channel
is return to priority channel.

3 Selected channel

The transceiver reverts to the channel before scanning or
the channel that you changed during scan.

4 Last called channel

The transceiver reverts to the last called channel during
the scan.

5 Last used channel

The transceiver reverts to the last used (transmitted)
channel during scan. “Last used” revert channel includes
talkback function.

6 Selected with talkback

The transceiver reverts to the channel before scanning or
the channel that you changed during scan.

8) Scan End

When you reactivate the key programmed to the scan

function during scan mode, the scan ends.

The scan icon “SCN” and “-SCAN-” or revert channel

(programmable) display goes off.

9) Temporarily Delete/Add

It is possible to delete or add channel temporarily during
scan. When scan stops on unnecessary channel for example
by interference of the other party, activate the delete/add
function (for example press the key), then that channel is
deleted temporarily and scan re-start immediately.

When you would like to add the deleted channel temporarily
to scan sequence, select the desired (deleted) channel during
scan, activate the delete/add function (for example press the
key) before scan re-start.

That channel is added temporarily to scan sequence. The
temporary deleted or added channels are returns to pre-set
delete/add, when the transceiver exits from scan mode.

2) Sub LCD display

You can use 3-digit the display to display the channel number
or group number. It is useful when the main (12-digit) display
indicates, group or channel name or other functions.

3) Selective Call Alert LED

You can select whether or not the LED on the transceiver
flashes in an orange color when selective call was occurred.

4) PTT ID

PTT ID provides a DTMF or FFSK (DMS : Fleet-ID) ANI to
be sent with every time PTT (beginning of transmission, end
of transmission, or both).

You can program PTT ID “on” or “off” for each channel.
The contents of ID are programmed for each transceiver.

The timing that the transceiver sends ID is programmable.

BOT : DTMF ID (BOT)/FFSK ID is sent on beginning of
transmission.
EOT : DTMF ID (EOT)/FFSK ID is sent on end of
transmission.
Both : DTMF ID (BOT)/FFSK ID is sent on beginning of
transmission and DTMF ID (EOT)/FFSK ID is sent on end of
transmission.

5) Radio password

When the password is set in the transceiver, user can not
use the transceiver unless enter the correct password.

This code can be up to 6 digits from 0 to 9 and input with
the selector knob, and [Side 2] key.

6) Minimum Volume

The minimum volume is programmable (off (0) to 31). The
transceiver remains the minimum volume level however the
mechanical volume position is set to zero.

7) “TOT” Pre-Alert

The transceiver has “TOT” pre-alert timer. This parameter
selects the time at which the transceiver generates “TOT”
pre-alert tone before “TOT” is expired.

“TOT” will be expired when the selected time passes from
a TOT pre-alert tone.

8) “TOT” Re-Key Time

The transceiver has “TOT” re-key timer. This timer is the
time you can not transmit after “TOT” exceeded. After “TOT”
re-key time expired you can transmit again.

4. Details of Features

1) Time-out timer

The time-out timer can be programmed off or in 1 second
increments from 30 seconds to five minutes. If the transmitter
is keyed continuously for longer than the programmed time,
the transmitter is disabled and a warning tone sounds while
the PTT button is held down. The alert tone stops when the
PTT button is released.

8

9) “TOT” Reset Time

The transceiver has “TOT” reset timer. This timer is the
minimum wait time allowed during a transmission that will
reset the “TOT” count.

“TOT” reset time causes the “TOT” to continue even after
PTT is released unless the “TOT” reset timer has expired.

OPERATING FEATURES

TK-3140

10) OST (Operator Selectable Tone)

The transceiver is capable to have “OST” function and 38

tone pair (QT/DQT) with max 10-digit name for each tone pair.

• “OST” Back Up

The transceiver is programmable the selected “OST” code
is memorized or not. If you set to Disable (no memorized), the
“OST” function always starts at “off”.

• Selectable No Tone

“TONE OFF” can be selected in the OST Select mode when
you select the “Selectable No Tone” option in the Operator
Selectable Tone window. When it is unchecked, the TONE
OFF setting is ignored.

11) Clear to Transpond

The transceiver waits the transpond of 5tone/2tone/DTMF
if channel is busy until channel open. This feature prevents
the interference to other party.

12) Battery Warning/Status

The battery warning function checks the battery voltage
level automatically. If the battery voltage drops to a
predetermined value, the operator will be notified.

The Battery Status function shows the current remaining
battery capacity in 4 different levels (High, Sufficient, Low and
Very low).

Unless the Battery Warning/Status function is set to OFF,
the low battery warning function is activated when the
transceiver detects the low battery voltage. The transceiver
either beeps, the “Lo” icon blinks, the red LED blinks or the
Very Low indicator (Battery) blinks, depending on the
transceiver’s settings.

Then more low voltage is detected during transmission,
the transceiver does not transmit and the warning tone beeps
while the PTT key is pressed.

Measurements given by this function should be used just
as a reference.

15) Com Port

This function selects the external serial port function at the
universal connector (TXD/RXD). PC programming is accepted,
regardless of this setting.

5. Option Signalling (DTMF/2tone)

Built-in DTMF decoder is available for option signalling.

Built-in 2-Tone decoder is available for option signalling.

It is possible to use individual call, group call, stun, kill. Stun
and kill are used with DTMF only.

Preset operation is triggered when matches with Option
Signaling

When Option Signaling matches on a Group Channel where
set to Yes, the Option Signaling display flashes and Option
Signaling is canceled. Settings after this will cause
“Transpond” or “Alert” to sound.

Setting the Selective Call Alert LED will make an orange
LED start flashing.

Mute or Unmute is triggered by the ID/QT/DQT/Carrier when
option signaling is a match (when Option Signal is deactivated
by a transmission).

AND/OR

Option Signaling match conditions can be selected with
AND/OR logic.

Alert/Transpond AF Mute Open

AND

match with DTMF.

by receiving the carrier.

Triggers at match with QT/ Triggers at match with QT/
DQT/ID+DTMF (2tone);Both

OR

Triggers only for match with
DTMF (2tone) : Opt QT/DQT/ID;Signaling

Even if set for OR, AF mute cannot be canceled just by a

In channels not set with QT/DQT, signaling is a match just

DQT/ID+DTMF (2tone);
Triggers only for match with

Both

13) Battery Save

Battery Saver becomes active when the squelch is closed.
The receiver circuit power is toggled ON and OFF to prolong
battery life, except in Scan mode.

The “ON” time is automatically selected by the signal
conditions.

The “OFF” time is selectable as [OFF], [Short](200ms),
[Med](400ms) and [Long](800ms).

14) Auto Light on

You can use the transceiver to turn on the backlight
automatically when a key is pressed.

You can turn off the back light by pressing the [Lamp] key
while the backlight is ON. You can manually turn on the light
at any time by pressing the [Lamp] key.

Auto Reset

When Option Signaling matches on a Group channel where
set to Yes, Option Signaling is canceled when it matches a
group channel set to Yes.

After Option Signaling is a match, Option Signaling can
automatically set to Reset after a specified time.

Stun/Kill

If the Stun code matches, a predetermined action will occur.
Whether option signalling is activated or not, when stun code
matches on any channel, the transceiver will become stun or kill.

While stun is active (“LOCK 2” appears), if the stun code +
“#” code is received, stun will disactive.

While kill is active (“ERROR” appears), the transceiver will
be disable all functions. The transceiver must be
reprogrammed by the FPU (KPG-74D (M2)) to operation again.

9

TK-3140

OPERATING FEATURES

6. Alphanumeric Two-way Paging Function
(Digital Message System)

■ General

The Alphanumeric Two-way Paging Function (DMS) is a
Kenwood proprietary protocol. It enables a variety of paging
functions.

■ ID Construction

A radio unit ID is defined by a combination of 3-digit Fleet
and 4-digit ID numbers. Each radio unit must be assigned its
own Fleet and ID numbers.

■ Digital Message System [DMS]

●

Inter-fleet Call

Configure the transceiver to respond calls from stations that

have a different fleet number.

■ PTT ID

A pre-programmed unique ID can be sent at the beginning
of transmission and/or the end of transmission to identify which
radio unit is on air.

■ Selective Call (SELCALL)

This is a voice call to a particular individual or group of stations.

●

Example of call types;

[100][ALL ] : <Group Call>

All the units whose fleet number is “100” are called.

[100][1000] : <Individual Call>

The unit, whose the fleet number is “100” and ID number

is “1000”, is called.

[ALL][ALL ] : <Broadcast Call>

All the units are called.

[ALL][1000] : <Supervisor Call>

All ID “1000” are called regardless of their fleet number.

●

Unit ID Encode Block

This function limits the usable IDs using the Block function.

If Inter-fleet Call is enabled, block ID setting affects each

fleet group.

■ Status Message

Using a 2-digit number, you can send and receive a Status
message which may be decided in your talk group. Each Status
may be displayed with 16 alphanumeric characters if
programmed in the radio. A maximum of 15 received messages
can be stored in the stack memory, and it can be reviewed
after reception. If the message memory becomes full, the
oldest one will be erased. The stack memory will be cleared
by turning radio power off.

●

Automatic Status Response

If you pre-select a status number and leave the radio in the
Status Mode, it can automatically respond with the selected
status number upon request from the base station. (The
request function is initiated by serial control on the base
station (Optional).)

■ Short Message (Optional)

A maximum of 48 characters can be sent (External
equipment is required). Received Short Messages will be
displayed in the same manner as a Status Message. A
maximum of 15 received messages can be stored in the stack
memory. In the Stack Mode, 3-digit LCD indicates the received
Short Message as “Q1”~”Q15”.

■ Long Message

A maximum of 4096 characters can be sent (External
equipment is required). Received Long Message will not be
displayed or stacked in the radio memory but is output through
the COM (Data) port.

■ Emergency Function

Emergency status 99 will be sent at the beginning of each
emergency transmission.

●

Emergency Status response

“Alert” can be selected for the called radio unit’s response

to reception of status 99 which is used as an emergency

status.

■ Other Functions

●

Data TX with QT/DQT

Whether programmed QT/DQT is modulated or not with a

data transmission except for Selcall. A radio unit can receive

a data message regardless of QT/DQT if the receiving unit

is not scanning.

●

DMS Baud Rate

FFSK data baud rate setting. The same rate must be set as

a communication partner.

1200bps :

Data communication is made in 1200bps. The

communication area is much wider than 2400bps.

Recommended for repeater operation.

2400bps :

Data communication is made in 2400bps. The

communication area is narrower than 1200bps, but it will

decrease the data traffic. Data rate 2400bps may not work

properly depending on the repeater’s characteristic.

●

Inter-fleet call

●

Status/Short/Long Message on Data Group/Channel

Status/Short/Long Message transmission is made whether

on the Data Group/Channel.

10

OPERATING FEATURES

●

Status/Short/Unit ID Message Serial Output

Whether a received Status/Short message or PTT ID is
outputed or not to serial port.

■ Parameters

●

GTC Count

Number of “Go To data Channel” messages to be sent
before transmitting a data message if it is being made on
Data Group/Channel. If a radio unit receives a GTC message,
it will move to the Data Group/Channel of the current Group.
Increase this item to make sure the called radio unit moves
to the Data Group/Channel.

●

Random Access (Contention)

When a channel is busy, radio unit will not transmit
(depending on its Busy Channel Lockout setting). As soon
as a channel is cleared, some transmissions may crash.
Random access is used to avoid this by employing a random
transmission sequence.

TK-3140

7. 5tone

When you select 5tone Model, you can set the following

options.

When you select Basic level features, only 1 frame 5tone

format can be programmed.

When you select Full level features, up to 3 frame 5tone

format can be programmed.

Enabling “Setting Level” on each menu, you can also use

“Encode/decode format”.

Using “Encode/decode format”, you can further program

the transceiver to run the script.

■ 5tone Standard

The selected 5tone Standard is used for 5tone encoding

and decoding.

Range:

ZVEI, CCIR, EEA, PZVEI, DZVEI, PCCIR, PDZVEI, ZVEI-2,

EIA, Natel, AP-369, Kenwood

●

Number of Retries

Number of Retries is the maximum number of retry
transmission when no acknowledgement is received in the
Maximum ACK Wait Time. Increase this item to improve
data communication reliability.

●

TX Busy Wait Time

TX Busy Wait Time is the maximum amount of time before
giving up the data transmission when the channel is busy.
Also, this timer affects if it expires during Random Access
period.

●

Maximum ACK Wait Time

Maximum ACK Wait Time is the maximum amount of time
to wait for an acknowledgement from the called radio unit.
It is used as an interval time of retries. It must be set greater
than the ACK Delay Time of the called radio unit.

●

ACK Delay Time

ACK Delay Time is the amount of time from the end of
receiving a data to the beginning of sending an
acknowledgement. It should be adjusted as the repeater’s
hang-up delay time. Also, it must be set less than the
Maximum ACK Wait Time of the calling radio unit.

●

TX Delay Time (RX Capture)

TX Delay Time is the amount of unmodulated transmission to
let the called unit stop scanning or exit its battery save mode.
It is used only when starting a data communication sequence.

●

Data TX Modulation Delay Time

Data TX Modulation Delay Time is the amount of time from
the beginning of transmission to the beginning of a data
modulation. It is used every time data is transmitted.

■ Monitor Function

You can select either QT/DQT or 5tone decoding to be
canceled when [Monitor] or [Monitor Momentary] key is
pressed.

When Monitor function is activated, “MON” icon appears.

When the transceiver is set up in “QT/DQT, cancels the
decoding in QT/DQT Decode.

The squelch is controlled by the signal carrier only.

When the transceiver is set up in “5tone”, cancels the
decoding in 5tone Decode.

The squelch is controlled by QT/DQT Decode only.

If QT/DQT code is programmed in QT/DQT Decode, incoming
signal must match the QT/DQT code to open the squelch.

■ Busy Channel Lockout

You can inhibit the transmission while the channel is busy.
You can program the following different conditions.

When the transceiver is set up in “Lockout 1”:

Do not transmit when the transceiver is receiving the carrier.
Transmit when the transceiver is not receiving the carrier.

When the transceiver is set up in “Lockout 2”:

Do not transmit when the transceiver is receiving the carrier
and QT/DQT code does not match.

Transmit when the transceiver is not receiving the carrier
or receiving the QT/DQT code matches.

■ Selectable Receive Digit

Select the check box to change Receive Code (maximum 8
digits) manually when receiving Decode Code. You cannot
select Selectable Receive Digit, Store Selcall Digit and Store
Status Digit at the same time.

For example, the transceiver receives 5tone code, #59401
when you have 4th and 5th digit checked in Selectable Receive
Digit menu. In this case, #01 is stored as Receive Code.

Press [Receive Entry] key to enter Receive Entry mode.

11

TK-3140

OPERATING FEATURES

When you enter Receive Entry Mode, you can change the

Receive Code, #01.

You can receive the Receive Code after the modification.

■ Selectable Selcall Digit

Select the check box to change Selcall Code (maximum 8
digits) manually when transmitting Encode Code. You cannot
select Selectable Selcall Digit and Selectable Status Digit at
the same time.

For example, the transceiver receives 5tone code, #59401
when you have 4th and 5th digit checked in Selectable Selcall
Digit menu. In this case, #01 is stored as Selcall.

Press [Selcall Entry] key to enter Selcall Entry mode.

When you enter Selcall Entry Mode, you can change the
Selcall Code, #01.

You can transmit the Selcall after the modification.

■ Selectable Status Digit

Select the check box to change Status Code (maximum 8
digits) manually when transmitting Encode Code. You cannot
select Selectable Selcall Digit and Selectable Status Digit at
the same time.

For example, the transceiver receives 5tone code,
#5940167 when you have 6th and 7th digit checked in
Selectable Status Digit menu.

Press [Selcall Entry] key to enter Status Entry mode.

When you enter Status Entry Mode, you can change the
Status Code, #67.

You can transmit the Status code after the modification.

■ Automatic Close

It compares the selected digits of RX Address code in
Channel menu when the transceiver receives 5tone signalling.
If the selected digits matches to the received 5tone code, the
transceiver closes Monitor. You can select maximum 8 digits
of RX Address.

■ Copy from TX/RX Address

You can select to copy the digit to the memory when you
change the channel, using the selector knob.

Receive Digit in “RX Address” is copied when the channel
is changed. Selcall/Status Digit in “TX Address” is copied when
the channel is changed.

■ Encode Code

When “Special Setting” is disabled, you can select the
Encode Code to transmit when [Call 1-6] key is pressed.

You can select up to 3 codes to transmit 3-frame 5tone
code. The Encode Code is transmitted from left to right digit.
24 different Encode Codes are available.

When “Special Setting” is enabled, you can select the
Encode Format setting from #1 to #32.

You can select the Encode Format name, configured in
Encode Format menu.

12

■ Decode Code

When “Special Setting” is disabled, you can select the

Decode Code setting from #1 to #8.

The transceiver tries to decode the selected Decode Code
setting (maximum 8 different settings) at the same time. When
the code matches in “5tone Code” menu, the transceiver
operates as programmed in “Decode Code” menu.

When “Special Setting” is enabled, you can select the
Decode Format setting from #1 to #32.

You can select the Decode Format name, configured in
Decode Format menu.

You can program the 5-tone code you want to receive for
each channel. At the same time, you can be on stand-by for a
Single tone.

If the 5-tone code set in your transceiver matches a received
code, Monitor is activated and a beep sounds. You can display
the received 5-tone code on the LCD screen and transmit an
acknowledgement to the Base station. Furthermore, you can
activate the stun and kill features.

■ Selcall/Status List

You can program Selcall or Status Message when you select
the party from the List to make a 5tone selective call. Or you
want to display Selcall(Status) Code or Message when you
receive the call.

Maximum 8-digit can be programmed for the Code and 100
different Selcalls or Status are available for Selcall/Status List.

You can assign 16 alphanumeric characters to each
message.

■ Programmable Alert Tone

You can program the alert type from type 1 to type 8, when
the expected 5-tone is received.

You can program the number of times to repeat outputting
and frequency and duration for the Alert Tone.

When you select “Special Setting”, you can further
configure the beep tone type from No. 1 to No. 47, using the
Encode/Decode format.

■ Encode/Decode Format

You can use Encode/Decode Format script function when
you select “Feature Level”=FULL and “Special Setting”
=Enabled.

In order to write the Encode/Decode Format script, you
need the technical knowledge of 5tone signalling functions.
Of course, you can write the script to perform all the functions
that you can do with “Feature Level”=BASIC and FULL and
“Special Setting”=Disabled. (Menu driven method)

In addition, you can write the original script to control various
functions and signalling timing.

Refer to each function of Encode/Decode Format Code for
details. Sample scripts are also available in the KPG-74D (M2).

You can create 32 different types of Encode/Decode
Formats. You can assign a name up to 12 characters for each
Encode/Decode Format.

OPERATING FEATURES / REALIGNMENT

TK-3140

8. Audible User Feedback Tones

The transceiver outputs various combinations of tones to
notify the user of the transceiver operating state. The main
tones are listed below.

■ Power on tone

This tone is output when the transceiver is turned on. (The
high tone is output for 500ms.)

■ Alert tone

This tone is output when the transceiver is TX inhibition for
TOT, battery warning and PLL unlocked. It is output until the
PTT button is released.

■ Group call tone

Sounds when a group call with the correct DTMF/2-tone
option signalling is received.

■ DMS signalling alert tone

Sounds when an individual call with the correct DMS
signalling is received.

■ Individual call tone

Sounds when an individual call with the correct DTMF/2­tone option signalling is received.

■ Key press tone [A]

Sounds when a key is pressed. For toggle keys, sounds
when toggle function is turned on (key press tone [B] sounds
when it is turned off).

■ Key press tone [B]

Sounds when a key is pressed. For toggle keys, sounds
when the toggle function is turned off (key press tone [A]
sounds when it is turned on).

■ Key press tone [C]

Sounds when a key is pressed. Also sounds when storing
data, adding a DTMF code to memory, and when changing
test mode settings.

■ Key input error tone

Sounds when a key is pressed but that key cannot be used.

■ Roll over tone

Sounds at the smallest group/channel.

■ Transpond tone

Sounds when an individual call with the correct DTMF/2­tone option signalling is received. For group calls, only the
group tone will sound, not the transpond tone.

REALIGNMENT

1. Modes

User mode

Panel test mode

PC mode

Firmware
programming mode

Clone mode

Self programming
mode

Mode Function

User mode For normal use.
Panel test mode Used by the dealer to check the

Panel tuning mode Used by the dealer to tune the radio.
PC mode Used for communication between the

Data program- Used to read and write frequency data
ming mode
PC test mode Used to check the radio using the PC.

PC tuning mode Used to check the radio using the PC.

Firmware program- Used when changing the main
ming mode program of the flash memory.
Clone mode Used to transfer programming data

Self programming Frequency, signalling and features
mode write to the radio.

Panel tuning mode

Data programming
mode

PC test mode

fundamental characteristics.

radio and PC (IBM compatible).

and other features to and from the radio.

This feature is included in the FPU.
See panel test.

This feature is included in the FPU.
See panel tuning.

from one radio to another.

PC tuning mode

2. How to Enter Each Mode

Mode Operation

User mode Power ON
Panel test mode [A]+Power ON
PC mode Received commands from PC
Panel tuning mode [Panel test mode]+[S]
Firmware programming mode
Clone mode [C]+Power ON
Self programming mode [Side 2]+Power ON

[S]+Power ON

3. Panel Test Mode

Setting method refer to ADJUSTMENT.

■ Pre alert tone

Sounds prior to the TOT TX inhibit activation. If TOT pre
alert is set, the tone sounds at the amount of time
programmed, before the TOT expires (TOT time–TOT pre alert
time = Pre alert tone sounding time).

4. Panel Tuning Mode

Setting method refer to ADJUSTMENT.

13

TK-3140

REALIGNMENT

5. PC Mode

5-1. Preface

The TK-3140 transceiver is programmed by using a personal
computer, programming interface (KPG-36) and programming
software (KPG-74D (M2)).

The programming software can be used with an IBM PC or
compatible. Figure 1 shows the setup of an IBM PC for
programming.

5-2. Connection procedure

1. Connect the TK-3140 to the personal computer with the

interface cable.

2. When the POWER switch on, user mode can be entered

immediately. When PC sends command the radio enter
PC mode, and “PROGRAM” is displayed on the LCD.
When data transmitting from transceiver, the red LED is
blinking.
When data receiving to transceiver, the green LED is blinking.

Notes:

• The data stored in the personal computer must match

model type, when it is written into the flash memory.

• Change the TK-3140 to PC mode, then attach the interface

cable.

5-3. KPG-36 description

(PC programming interface cable: Option)

The KPG-36 is required to interface the TK-3140 to the
computer. It has a circuit in its D-subconnector (25-pin) case
that converts the RS-232C logic level to the TTL level.

The KPG-36 connects the universal connector of the TK­3140 to the computers RS-232C serial port.

5-4. Programming software KPG-74D (M2) Description

The KPG-74D (M2) is the programming software for the
transceiver supplied on three 3.5” floppy disks. This software
runs under MS-Windows 95/98/Me/2000 on an IBM-PC or
compatible machine.

The data can be input to or read from the trnsceiver and
edited on the screen. The programmed or edited data can be
printed out. It is also possible to tune the transceiver.

We recommend that install the KPG-74D (M2) for example
to hard disk first then use it.

5-5. Programming with IBM PC

If data is transferred to the transceiver from an IBM PC
with the KPG-74D (M2), the destination data (basic radio
information) for each set can be modified. Normally, it is not
necessary to modify the destination data because their values
are determined automatically when the frequency range
(frequency type) is set.

The values should be modified only if necessary. Data can
be programmed into the flash memory in RS-232C format via
the universal connector.

14

IBM-PC

KPG-36

KPG-74D (M2)

Fig. 1

6. Firmware Programming Mode

6-1. Preface

Flash memory is mounted on the TK-3140. This allows the
TK-3140 to be upgraded when new features are released in
the future. (For details on how to obtain the firmware, contact
Customer Service.)

6-2. Connection procedure

Connect the TK-3140 to the personal computer (IBM PC or
compatible) with the interface cable (KPG-36). (Connection is
the same as in the PC Mode.)

6-3. Programming

1. Start up the firmware programming software (Fpro.exe).

2. Set the communications speed (normally, 57600 bps) and

communications port in the configuration item.

3. Set the firmware to be updated by File name item.

4. Turn the TK-3140 power ON with the [S] switch held down.

Hold the switch down until the display changes to “PROG
57600”. When “PROG 57600” appears, release your finger
from the switch.

5. Check the connection between the TK-3140 and the

personal computer, and make sure that the TK-3140 is in
the Program mode.

6. Press write button in the window. A window opens on the

display to indicate progress of writing. When the TK-3140
starts to receive data. the [P] icon is blinking.

7. If writing ends successfully. the LED on the TK-3140 lights

and the checksum is displayed.

8. If you want to continue programming other TK-3140s,

repeat steps 4 to 7.

Notes:

●

This mode cannot be entered if the Firmware Programming
mode is set to Disable in the Programming software (KPG­74D (M2)).

●

When programming the firmware, it is recommend to copy
the data from the floppy disk to your hard disk before update
the radio firmware.
Directry copying from the floppy disk to the radio may not
work because the access speed is too slow.

REALIGNMENT

TK-3140

6-4. Function

1. If you press the [Side 1] switch (top of left side) while
“PROG 57600” is displayed, the version is displayed. If
you press the [Side 1] switch again while the version is
displayed, “PROG 57600” is redisplayed.

2. If you press the [Side 2] switch (bottom of left side) while
“PROG 57600” is displayed, the display changes to “PROG
19200” to indicate that the write speed is low speed (19200
bps). If you press the [Side 2] switch again while “PROG
19200” is displayed, the display changes to “PROG 38400”,
and the write speed becomes the middle-speed mode
(38400 bps). If you press the [Side 2] switch again while
“PROG 38400” is displayed, the display returns to “PROG
57600”.

3. If you press the [Side 2] switch while the version is
displayed, the checksum is displayed. If you press the [Side
2] switch again while the checksum is displayed, the version
is redisplayed.

Note:

Normally, write in the high-speed mode.

7. Clone Mode

Programming data can be transferred from one radio to
another by connecting them via their external universal
connectors. The operation is as follows (the transmit radio is
the master and the receive radio is a slave).

1. Turn the master TK-3140 power ON with the [C] key held

down. If the Data password is set to the TK-3140, the TK­3140 displays “CLONE LOCK”. If the password is not set,
the TK-3140 displays “CLONE MODE”.

2. When you enter the correct password, and “CLONE

MODE” is displayed, the TK-3140 can be used as the
cloning master. The following describes how to enter the
password.

3. How to enter the password with the encoder;

If the encoder is rotated while “CLONE LOCK” is displayed,
numbers (0 to 9) are displayed flashing. When you press
the [C] key, the currently selected number is determined.
If you press the [Side 2] key after entering the password in
this procedure, “CLONE MODE” is displayed if the entered
password is correct. If the password is incorrect, “CLONE
LOCK” is redisplayed.

4. Power on the slave TK-3140.

5. Connect the cloning cable (No. E30-3325-05) to the

universal connectors on the master and slave.

6. Press the [C] key on the master while the master displays

“CLONE MODE”. The data of the master is sent to the
slave. While the slave is receiving the data, “PROGRAM”
is displayed. When cloning of data is completed, the master
displays “END”, and the slave automatically operates in
the User mode. The slave can then be operated by the
same program as the master.

7. The other slave can be continuously cloned. When the [C]
key on the master is pressed while the master displays
“END”, the master displays “CLONE MODE”. Carry out
the operation in step 4 to 6.

Note:

Only the same models can be cloned together.

Fig. 2

8. Self Programming Mode

Write mode for frequency data and signalling etc. Mainly

used by the person maintaining the user equipment.

8-1. Enter to the self programming mode

Delete R351 (Figure 3) in the TX-RX unit and turn the power
switch on while pressing the [Side 2] key. When enter the
self programming mode, “SELF PROG” is displayed.

Note :

This mode (self programming mode) cannot be set when it
has been disabled with the FPU.

TX-RX UNIT (A/3)
Component side

51

50

IC309

R351

Fig. 3

15

TK-3140

REALIGNMENT

8-2. Channel Setting Mode

This is a mode for making channel settings with the panel

keys without using the FPU.

Pressing [Side 1] when [SELF PROG] is displayed, sets
Channel Setting Mode.
Select an item set with [C] and change the selection with
the encoder.
The data displayed with [B] is stored in the memory and
then proceeds to the next item. Pressing [C] proceeds to
the next item without storing it in the memory.
Press [Side 1] to set the display to [SELF PROG] and return
to reset (default) status.

●

Flow Chart

Self programming mode

[Side 1]

[Side 1]

[Side 1]

[Side 1]

[Side 1]

[Side 1]

[Side 1]

[Side 1]

[Side 1]

[Side 1]

[Side 1]

16

Channel setting mode

[B]

RX frequency

[B]/[C]

RX signalling

[B]/[C]

TX frequency

[B]/[C]

TX signalling

[B]/[C]

Scan delete/add

[B]/[C]

RF Power High/Low

[B]/[C]

Beat shift yes/no

[B]/[C]

Wide 5k/Wide 4k/Narrow

[B]/[C]

Compander

[B]/[C]

[Side 2]

[Side 2]

[Side 2]

[Side 2]

Items set in Channel Setting Mode are as follows.

Function settings
Channel select

Display Remarks
Channnel
or Group

RX Frequency RXF [Side 2] : Freq. On/Off switching

RX Signalling RXS [Side 2] : OFF/QT/DQT switching

TX Frequency TXF Key operation same as RX

TX Signalling TXS Key operation same as RX

Scan Delete/Add

SCN DEL/ADD

RF Power PWR HIGH/LOW
Beat Shift SFT YES/NO
Wide 5k/Wide 4k

w/s/n Wide 5k/Wide 4k/Narrow

/Narrow
Compander CMP ON/OFF

Channel selection Group selection

OFF

OFF QT

[Side 2]

OFF

OFF

[Side 2]

[C]

QT

[Side 2]

DQT N

[Side 2]

[Side 2]

DQT N

[Side 2]

8-3. Memory Reset Mode

This mode is used to clear data for functions that can be
set in Self Programming Mode or to return to reset values
(default).

Pressing [S] when [SELF PROG] is shown, sets the display
to [CLEAR NO?].

Turning the encoder alternately switches the display
between [CLEAR NO?] [CLEAR YES?].

Pressing [S] when [CLEAR YES?] is shown, clears the data
and sets the display to [ALL CLEAR].

Pressing [S] again, returns the display to [SELF PROG].

Pressing [S] when [CLEAR NO?] is shown, returns the
display to [SELF PROG] without resetting the data.

[A] : 5kHz/6.25kHz/1MHz step
switching

[A] : 1 step/Standard switching
[S] : DQT Normal/Invert swtiching

Frequencies

Signalling

DQT I

[S]

DQT I

[S]

CIRCUIT DESCRIPTION

TK-3140

1. Overview

This transceiver is UHF/FM portable transceiver designed
to operate in the frequency range of 440 to 470MHz (E) and
400 to 430MHz (E3).

2. Circuit Configuration by Frequency

The receiver is a double-conversion superheterodyne with
a first intermediate frequency (IF) of 44.85MHz and a second
IF of 455kHz. Incoming signals from the antenna are mixed
with the local signal from the PLL to produce the first IF of

44.85MHz.

This is then mixed with the 44.395MHz second local
oscillator output to produce the 455kHz second IF. This is
detected to give the demodulated signal.

The transmit signal frequency is generated by the PLL VCO,
and modulated by the signal from the microphone. It is then
amplified and sent to the antenna.

TX/RX : 440~470MHz : E

400~430MHz : E3

ANT

1st MIX

SW

PA

RF

AMP

TX

AMP

395.15~425.15MHz : E

355.15~385.15MHz : E3

440~470MHz : E
400~430MHz : E3

ANT

AMP

MCF

44.85MHz

CF

455kHz

FM IF

SYSTEM

PLL

VCO

AMP

44.395MHz

MIC

AMP

AF

SP

MIC

Fig. 1 Frequency configuration

3. Receiver System

3-1. RF unit

An incoming RF signal from the antenna terminal is passed
through the antenna switch (D102, D103, D104. and D105
are off) and then the bandpass filter (L215,217). High pass

ANT

filter HPF (L219) the 1st image response improve. And the
bandpass filter is adjusted by a variable capacitor. The input
voltage to the variable capacitor is regulated by the voltage
output from the D/A converter (IC307). The signal is amplified
by RF amplifier Q207, and passed through the bandpass filter
(L209,210,211). The resulting signal is applied to the first mixer
(Q206), where it is mixed with the first local oscillator signal
output from the frequency synthesizer to produce the first IF
(44.85MHz).

3-2. IF unit

The first IF signal is passed through a four-pole monolithic
crystal filter (XF200) to remove a adjacent channel signal. The
filtered first IF signal is amplified by the first IF amplifier (Q205)
and then applied to the lF system IC (IC200). The IF system IC
provides a second mixer, second local oscillator, limiting
amplifier, quadrature detector and RSSI (Received Signal
Strength Indicator). The second mixer mixes the first IF signal
with the 44.395MHz of second local oscillator output (crystal
unit X200) and produces the second IF signal of 455kHz.

The second IF signal is passed through the ceramic filter
(CF200 : Wide, CF201 : Narrow) to more remove the adjacent
channel signal. The filtered second IF signal is amplified by
the limiting amplifier and demodulated by the quadrature
detector with ceramic discriminator (CD200). The demodulated
signal is routed to the audio circuit.

Center Frequency Nominal 455kHz

Band Width

Stop Band Attenuation

3dB Min. ±6.5kHz

50dB Max. ±15.5kHz

±18~±33kHz Min. 55.0dB

±100kHz Min. 50.0dB

Spurious Response 0.1~1.0MHz Min. 20.0dB

Ripple Within 455±6.5kHz Max. 2.0dB

Insertion Loss at 455 kHz Max. 4.0dB

Group Delay Time

Within 455±3.0kHz Max. 25.0µ sec
Within 455±5.0kHz Max. 50.0µ sec

Table 1 Ceramic filter (L72-0995-05): CF200

L110,111

L112

ANT

SW

D102,103
D104,105

IC501

23 20

AUDIO IC

L215,217

BPF

IC307

VOL

Q207

RF

AMP

L209,210

L211

Q308

SSW

BPF

SW

VC1

VC2

Q206

1st MIX

1st Local

OSC (PLL)

IC313

AF PA

XF200

MCF

Fig. 2 Receiver section

Q205

IF AMP

X200

INT.

SP

EXT.

SP

2nd local

OSC

IC200

MIX, DET, IF

CF200

CF201

: Wide

: Narrow

Q204

SW

DMDM

IC303 (1/2)

AF AMP

17

TK-3140

CIRCUIT DESCRIPTION

Center Frequency Nominal 455kHz

Band Width

Stop Band Attenuation

6dB Min. ±4.5kHz

40dB Max. ±10.0kHz

±100kHz Min. 25.0dB

Ripple Within 455±3.0kHz Max. 1.5dB

Insertion Loss at 455 kHz Max. 6.0dB

Table 2 Ceramic filter (L72-0996-05): CF201

3-3. Wide/Narrow switching circuit

Wide and Narrow settings can be made for each channel

by switching the ceramic filters CF200 (Wide), CF201 (Narrow).

The WIDE (high level) and NARROW (low level) data is

output from IC311.

Regardless of NARROW or WIDE band selection, signals

always pass through the filter, CF200.

When the WIDE band is selected, Q201 is turned ON, then

D202 and D203 are turned OFF.

So, the signal does not pass through the filter CF201. When
the NARROW band is selected, Q201 is turned OFF, then D202
and D203 are turned ON. So, the signal passes through the
filters, CF200 and CF201.

Q202 turns on/off with the Wide/Narrow data and the IC200
detector output level is changed to maintain a constant output
level during wide or narrow signals.

3-4. Audio amplifier circuit

The demodulated signal from IC200 goes through the mute
switch (Q204) and is amplified by IC303 (1/2), high-pass filtered,
low-pass filtered, high-pass filtered, and de-emphasized by
IC501.

The signal then goes through an electronic volume control
(IC307), and an AF switch (Q308 is on), and is routed to audio
power amplifier (IC313), where it is amplified and output to
the internal speaker.

The audio mute signal (AM1) from the shift register
becomes Low in the standby and Q302, Q303 which are power
supply circuit for IC313 turn off. Also, IC501 is set to the power
down mode according to data from microprocessor, and the
AF signal is muted. When the audio is output, AM1 becomes
High to turn Q302, Q303 ON, and voltage is supplied to power
terminal VP of IC313. Also, IC501 is canceled out of the power
down mode.

The speaker is switched by the logic of speaker switching
terminal SSW on the universal connector. When SP-MIC is
not attached, the logic of SSW becomes High and SW (Q308)
is turned ON, and the AF signal is input to both amplifiers of
IC313.

When SP-MIC is attached, SSW is connected to GND at
inside of SP-MIC. For this reason, Q308 is turned OFF, and
the AF signal is input only to amplifier for EXT SP of IC313.

Change of INT/EXT SP refer to Fig. 4.

5R

IC200

MIXOUT

C221

IFIN

CF200

R255

R221

CD200

QUAD

IFOUT

AFOUT

Q201

D202 D203

R208

AFOUT

R210

R264

R256

CF201

R211

C206

R222

R213

Q202

5CNS

C210

R216

W/N

(IC311 pin14)

AM1 SSW VC1 VC2 SP

HH HLINT
HL LHEXT

LH LLMUTE
LL LLMUTE

AM1

SSW

SB

AF

Q305

Q302

Q308

SW

Q307

Q303

VC1

2

VC2

8

Fig. 4 Audio amplifier circuit

VP 5

INT.SP

EXT.SP

IC313

18

Fig. 3 Wide/Narrow switching circuit