Kenwood TK-480 User manual

Document Copyrights
Copyright 2006 by Kenwood Corporation. All rights reserved.
No part of this manual may be reproduced, translated, distributed, or transmitted in any
form or by any means, electronic, mechanical, photocopying, recording, or otherwise, for
any purpose without the prior written permission of Kenwood.
Disclaimer
While every precaution has been taken in the preparation of this manual, Kenwood
assumes no responsibility for errors or omissions. Neither is any liability assumed for
damages resulting from the use of the information contained herein. Kenwood reserves
the right to make changes to any products herein at any time for improvement purposes.

© 2003-10 PRINTED IN JAPAN
B51-8665-00 (N)PDF
800MHz FM TRANSCEIVER
TK-480
SERVICE MANUAL
GENERAL ............................................................ 2
SYSTEM SET-UP ................................................ 2
OPERATING FEATURES .................................... 3
REALIGNMENT................................................... 8
PARTS LIST ....................................................... 10
EXPLODED VIEW ............................................. 16
PACKING ........................................................... 17
ADJUSTMENT .................................................. 18
SPECIFICATIONS.......................... BACK COVER
CONTENTS
M2 Version
Whip antenna
(T90-0636-25)
Knob (ENC)
(K29-5232-03)
Knob (VOL)
(K29-5231-03)
Panel assy
(A62-0981-04)
Cabinet assy
(A02-3659-13)
Knob (PTT)
(K29-5157-03)
Badge
(B43-1139-04)
Packing
(G53-0841-02)
This service manual has new information that is not
covered by the TK-480/481 (REVISED II) service
manual (B51-8408-20).
Refer to the TK-480/481 (REVISED II) service manual
(B51-8408-20) for items not provided in this service
manual.
CAUTION
When using an external power connector,
please use with maximum final module
protection of 9V.

2
TK-480
GENERAL / SYSTEM SET-UP
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced techni-
cians familiar with similar types of commercial grade com-
munications equipment. It contains all required service in-
formation for the equipment and is current as of this publica-
tion date. Changes which may occur after publication are
covered by either Service Bulletins or Manual Revisions,
which are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment informa-
tion, the full part identification number should be included.
This applies to all parts : components, kits, and 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.
PERSONNEL SAFETY
The following precautions are recommended for person-
nel safety :
•DONOT transmit until all RF connectors are secure and
any open connectors are properly terminated.
•SHUT OFF this equipment when near electrical blasting
caps or while in an explosive atmosphere.
•This equipment should be serviced by only qualified tech-
nicians.
SERVICE
This radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and align-
ment procedures contained within.
Model & Unit Frequency range Remarks Charger Battery 12 key
destination TX-RX unit DISPLAY unit
TK-480 M2 X57-5630-10 X54-3210-11 806~870MHz IF1 : 44.85MHz Option ✓✓
LOC : 44.395MHz
Note : X57-5630-10/X54-3210-11 : Produced in Singapore
Merchandise received
Choose the type of transceiver
Transceiver programming
Are you using the speaker microphone?
Delivery
TX 806~825 2.5W TK-480 M2
851~870
RX 851~870
Frequency range (MHz) RF power Type
A personal computer (IBM PC or compatible), programming
interface (KPG-36), and programming software (KPG-49D (M2)
ver 6.30 or later) are required for programming.
(The frequency, trunked system features, conventional system
features, TX power HI/LOW, and signaling data are programmed
for the transceiver.)
YES
NO
KMC-25
Speaker microphone
(Option)
SYSTEM SET-UP

3
TK-480
OPERATING FEATURES
1. Operation Features
The TK-480 is an 800MHz band EFJ LTR™-compatible
trunked radio designed to operate in both trunked and con-
ventional modes. The programmable features are summa-
rized.
Model Trunking mode
Conventional mode
This model can handle up to 32 systems with up to 250
groups in each system. The transceiver can be used in both
trunked mode and conventional mode. Systems, groups,
and their functions are programmed.
2. Transceiver Controls and Indicators
2-1. Physical Layout
5
4
1 2 3
Microphone Speaker
6
10
11
12
9
7
8
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 ex-
plained below.
Antenna connector
Connect the supplied antenna here.
System or Group selector knob (Programmable)
Turning the system (or group) selector knob clockwise
increases the system (or group) number by one. Turning
the knob in the counterclockwise direction decreases the
system (or group) number by one.
After the system number (or group number) reaches the
highest system number (or group number), it goes back
to lowest system number (or group number).
System numbers (or group numbers) not set are skipped.
Caution : The FPU (KPG-49D (M2) ver 6.30 or later) al-
lows selecting between system selector and group se-
lector.
Volume/Power switch
Transceiver Power and Volume switch. Turn clockwise to
switch On the transceiver. Turn counterclockwise fully to
switch OFF the transceiver. Also adjusts the volume
level. When the power is switched off, all the param-
eters, such as the system and group, are stored in
memory. When the power is switched on again, the sys-
tem returns to the previous conditions.
Auxiliary (orange) key (Programmable)
Battery pack release catch
Push down to release the battery pack. See Installing the
Ni-Cd Battery Pack.
MONITOR key* (Programmable)
PTT (Push-To-Talk) key
Press this key, then speak into the microphone to call a
station.
LAMP key* (Programmable)
TX/BATT indicator
This red LED lights during transmission (it does not light
during busy or when transmit is prohibited). If the battery
voltage falls below the programmed voltage during trans-
mission, the brightness of this indicator decreases at in-
tervals of about one second, so it can be used as the bat-
tery voltage alert function.
S, A, B, and C key (Programmable)
DTMF keypad
Press the keys on the telephone keypad to send DTMF
tones.
Universal connector
Connect the external KMC-25 speaker/ microphone (op-
tional) here. Otherwise, keep the supplied cover in place.
* : MONITOR and LAMP are arbitrary names chosen for
these buttons. They can be used for any of the auxiliary
functions.
2-3. Programmable keys
The FPU (KPG-49D (M2) ver 6.30 or later) enables pro-
grammable keys to select the following functions.
Auto Tel, AUX(only when Voice Scrambler is not se-
lected), DTMF ID (BOT), DTMF ID (EOT), Display Character,
Emergency (only AUX key), Function, Group Down, Group
Up, Home Group, Key Lock, Lamp, Memory (RCL/STO),
Memory (RCL), Memory (STO), Monitor A, Monitor B, Moni-
tor C, Monitor D, Redial, RF Power Lo, Scan, Scan Del/Add,
Scan Temporary Delete, Scrambler (Only when Voice
Scrambler is selected), SP Attenuation (Only MIC switch),
System Down, System Up, TEL Disconnect and none.
These functions the FPU programs to the function keys
are described in the following sections.

4
TK-480
OPERATING FEATURES
■Auto TEL
Automatically connects available repeaters that are con-
nected to telephone circuits when operating as LTR system.
The time allocated to search for available repeaters is 60
seconds, after which connection failure occurs, a DTMF
tone is output and the function terminates.
If connection to an available circuit is made, only ID 253,
EOT or hang-up time-out can terminate the function.
■AUX
This function can be programmed when the voice scram-
bler board is not installed.
If this key is pressed, an underscore (“_”) appears at the
extreme right of the LCD and AUX port which is inside of the
transceiver turns to the active level. If pressed again, the
underscore disappears and the AUX ports turns to the
deactive level.
■DTMF ID (BOT)
Pressing this key in Conventional mode, automatically
sends the preset Connect ID.
■DTMF ID (EOT)
Pressing this key in Conventional mode, automatically
sends the preset Disconnect ID.
■Display character
This key switches the LCD display between the system/
group number and system/group name.
■Emergency
Pressing this key for longer than the programmed “Emer-
gency Key Delay Time” causes the transceiver to enter the
emergency mode. The transceiver jumps to the pro-
grammed “Emergency System/Group” and transmits for
the programmed “Active Time”.
The transceiver disables mic mute while transmitting.
After finishing transmission, the transceiver receivers for
the programmed “Interval Time”. The transceiver mutes
the speaker while receiving. Following the above sequence,
the transceiver continues to transmit and receive.
If “Man Down Switch” has been programmed on the ra-
dio and the switch is activated, the radio enters Emergency
mode after the specified “Man Down Delay Time” expires.
■Function
Pressing this key causes the transceiver to display
“FCN”. Then, pressing a DTMF key causes the correspond-
ing programmed function to start. This key may be conve-
nient when using many functions with the 12-key keypad.
■Group up/down
When the key is pressed each time, the group number to
be selected is incremented/decremented and repeats if held
for one second or longer.
■Home group
Each pressing of the key selects a preset system/group.
■Key lock
Pressing this key causes the transceiver to accept entry
of only the [Function], [Key Lock], [PTT], [Lamp], [Monitor A],
[Monitor B], [Monitor C], [Monitor D], and [Emergency] keys.
The locked keys also include the tuning control.
■Lamp
This key illuminates the LCD and keys on the front panel.
When the key is pressed, the LED lamp goes on.
When it is released, the lamp goes off after about five
seconds. If any key is pressed while the LED lamp is on, the
lamp is kept on for five seconds.
■Memory
This key allows DTMF memory data to be recalled; up to
32 memories each with a memory dial of up to 16 digits and
an A/N of up to 10 digits per memory.
■Monitor
Used to release signalling or squelch when operating as a
conventional. It is also used to reset option signalling.
■Redial
Pressing this key when System/Group is shown, displays
the previously transmitted DTMF code. Pressing [PTT] at
this time, transmits the code that is currently displayed.
■RF power low
Used to temporarily switch transmission output to low
power. Turning the function on enables:
Hi→Low, Low→Low
Key states are backed up, except in the PC mode when
they are reset.
■Scan
Press this key starts scanning. Pressing this key stops
scanning.
■Scan Del/Add
Used to select whether system scan routines are used
during system scan. Each pressing of the key (to ON)
toggles between lockout and lock. The scan routine is
started when on lock. The DEL indicator flashes when the
system is on lockout.
■Scan temporary delete
This key is temporarily deleted a system being scanned.
If you press this key when scan is stopped (when a call is
being received from another station), the system is tempo-
rarily deleted and scanning restarts.
This key operates even when “Scan Type” is set to “List
Type System Scan”.
■Scrambler
If a scrambler code (1 to 4) has been set in the FPU, an
underscore (“_”) appears at the extreme right of the LCD
display when scrambler is active. Pressing this key changes
ON/OFF of scramble operation.
Holding this key down for 2 seconds sets Scramble Code
Select Mode.

5
TK-480
OPERATING FEATURES
■System up/down
When the key is pressed each time, the system number
to be selected is incremented/decremented and repeats if
held for one second or longer.
■Telephone disconnect
Pressing this key ends an RIC connection (disconnects
the telephone line).
■None
Sounds error operation beep, and no action will occur.
Use this function when the transceiver is required to be
more simple operated.
2-4. Display
Alphanumeric display
The twelve-character dot matrix alphanumeric display
shows the system and group numbers. You can program
system and group names with up to ten characters in
place of these numbers. The left display is used as a de-
lete indicator ( ) and the right is used for the selective
call ( ) or scrambler ( _ ) function. The delete/add indica-
tor shows the systems locked out of the scanning se-
quence. Selective call and scrambler are optional func-
tions that can be programmed. Also displays received
messages when using DMS (Digital Message System).
3. Option Signalling
3-1. DTMF
Built-in DTMF decoder is available for option signalling.
It is possible to use individual call, group call, D.B.D.
(Dead Beat Disable). D.B.D. is used with DTMF only.
If the option signalling matches, a predetermined action
will occur.
If option signalling matches on a group which is set up
with option signalling, the option signalling indicator ( ) will
flash and option signalling will be released. The transpond
or alert tone will sound.
If the selective call alert LED is set up, the orange LED
will flash.
While option signalling matches (or if option signalling is
deactivated when you are transmitting), you can mute or
unmute ID/QT/DQT/Carrier.
■AND/OR
You can select AND or OR for option signalling match
conditions.
Alert/Transpond
AND QT/DQT/ID+DTMF; Option matches = Action
OR QT/DQT/ID+DTMF; Option matches = Action
AF mute open
AND QT/DQT/ID+DTMF; Option matches = Action
OR QT/DQT/ID; Signalling only matches = Action
With OR set up, alert/transpond will not function with
only DTMF.
With OR set up, AF mute will not release when only
DTMF matches.
With a conventional group not set up with QT or DQT,
only the carrier is considered when signalling matches.
■Auto Reset
If option signalling matches a group set up with option
signalling, option signalling is released. After matching op-
tion signalling, option signalling will temporarily reset auto-
matically.
Sub display
Displays the system and group numbers. Also displays
various functions which have been programmed.
P (Priority) indicator
The P indicator ( ) appears when a selected channel is
programmed as priority, in conventional operation.
MON (Monitor) indicator
The MON indicator appears when the button pro-
grammed as MONITOR is pressed.
SVC (Service) indicator
This icon is not used on this transceiver.
SCN (Scan) indicator
The SCN indicator appears when using Scan mode.
LO indicator
Appears when low power is selected.
Handset indicator
The handset indicator ( ) appears when the selected
group is programmed as telephone IDs.
MAIL indicator
Flashes when a status message (DMS) is received.
Lights when a status message is stored in the stack
memory.
P
9

6
TK-480
OPERATING FEATURES
■Dead Beat Disable
If the D.B.D. code matches, a predetermined action will
occur. Whether option signalling is activated or not, when
D.B.D. matches on any group, the transceiver will become
TX inhibited or TX/RX inhibited. While D.B.D. is active, if the
D.B.D. code + “#” code is received, D.B.D. will disactivate.
When D.B.D. matches, transpond will function. Alert will
not be output, and option signalling match icon will not ap-
pear.
3-2. MSK
Built-in MSK (DMS : Fleet-ID) decoder is available for op-
tion signalling. When the group ID matches, squelch re-
mains muted while the station waits for reception of proper
MSK signal. When MSK signal matches, squelch unmutes.
■AND/OR
AND : QT/DQT/ID + MSK to unmute. MSK matches =
alert tone
OR : QT/DQT/ID to unmute. MSK matches = alert tone
4. Alphanumeric Two-way Paging Function
(Digital Message System)
4-1. General
The Alphanumeric Two-way Paging Function (DMS) is a
Kenwood proprietary protocol. It enables a variety of paging
functions.
4-2. 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.
4-3. PTT ID
A pre-programmed unique ID can be sent at the begin-
ning of transmission and/or the end of transmission to iden-
tify which radio unit is on air.
4-4. 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 num-
ber 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
Encode ID Block can be set to limit manual dial ID. The
radio unit will not accept an ID other than these IDs which
are entered from the keypad. If Inter-fleet Call is enabled,
block ID setting affects each fleet group.
4-5. Status Message
Using a 2-digit number, you can send and receive a Sta-
tus 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 9 received mes-
sages can be stored in the stack memory, and it can be re-
viewed 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.
■Status 80~99 (Special)
Status numbers from 80 to 99 are reserved for special
purposes. Entering these statuses from the DTMF keypad
can be inhibited.
Please notice that the following status numbers are used
for special purposes;
80~89 : Reserved for future use.
90 : Remote stun on. Disable the received radio unit’s
TX.
91 : Remote stun on. Disable the received radio unit’s
TX/RX.
92 : Cancel remote stun. Enable the received radio unit’s
TX/RX.
93 : Acknowledgement status sent when the radio unit is
in stun mode (TX disabled).
94 : Acknowledgement status sent when the radio unit is
in stun mode (TX/RX disabled).
95~98 : Reserved for future use.
99 : Emergency Status.
Note : Remote stun works with DTMF D.B.D. function also.
■Automatic Status Response
If you pre-select a status number and leave the radio in
the Status Mode, it can automatically respond with the se-
lected status number upon request from the base station.
(The request function is initiated by serial control on the
base station (Optional).)
4-6. Short Messase (Optional)
A maximum of 48 characters can be sent (External equip-
ment is required). Received Short Messages will be dis-
played in the same manner as a Status Message. A maxi-
mum of 4 received messages can be stored in the stack
memory. In the Stack Mode, 3-digit LCD indicates the re-
ceived Short Message as “M01”~”M04".
4-7. Long Message
A maximum of 1024 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.
4-8. Emergency Function
Emergency status 99 will be sent at the beginning of
each emergency transmission.

7
TK-480
■Emergency Status response
“Alert” can be selected for the called radio unit’s re-
sponse to reception of status 99 which is used as an emer-
gency status.
4-9. Other Functions
■Manual Dial
Fleet, ID and Status numbers can be entered from DTMF
keypad.
■Data TX with QT/DQT
Whether programmed QT/DQT is modulated or not with
a data transmission except for Selcall. A radio unit can re-
ceive a data message regardless of QT/DQT if the receiving
unit is not scanning.
■DMS Baud Rate
MSK data baud rate setting. The same rate must be set
as a communication partner.
1200bps :
Data communication is made in 1200bps. The communi-
cation area is much wider than 2400bps. Recommended for
repeater operation.
2400bps :
Data communication is made in 2400bps. The communi-
cation 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
Inter-Fleet Calls allow a radio of one Fleet number to call
a radio with a different Fleet number (radio users can manu-
ally dial a Unit ID with a different Fleet number).
■Status/Short/Long Message on Data Group/
Channel
Status/Short/Long Message transmission is made
whether on the Data System/Group.
■Status/Short/Unit ID Message Serial Output
Whether a received Status/Short message or PTT ID is
outputed or not to serial port.
4-10. 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 System/Group. If a radio unit receives a GTC message,
it will move to the Data System/Group of the current sys-
tem. Increase this item to make sure the called radio unit
moves to the Data System/Group.
■Random Access (Contention)
When a channel is busy, radio unit will not transmit (de-
pending 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 trans-
mission sequence.
■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 be-
fore 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 Maxi-
mum ACK Wait Time of the calling radio unit.
■TX Delay Time (RX Capture)
TX Delay Time is the amount of unmodulated transmis-
sion to let the called unit stop scanning or exit its battery
save mode. It is used only when starting a data communica-
tion 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.
OPERATING FEATURES

8
TK-480
REALIGNMENT
1. PC Mode
1-1. Preface
The TK-480 transceiver is programmed by using a per-
sonal computer, programming interface (KPG-36) and pro-
gramming software (KPG-49D (M2) ver 6.30 or later).
The programming software can be used with an IBM PC
or compatible. Figure 1 shows the setup of an IBM PC for
programming.
1-2. Connection procedure
1. Connect the TK-480 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-480 to PC mode, then attach the interface
cable.
1-3. KPG-36 description
(PC programming interface cable: Option)
The KPG-36 is required to interface the TK-480 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 TK-
480 to the computers RS-232C serial port.
1-4. Programming software description
The KPG-49D (M2) ver 6.30 or later programming disk is
supplied in 3-1/2" disk format. The software on this disk al-
lows a user to program TK-480 radio via programming inter-
face cable (KPG-36).
1-5. Programming with IBM PC
If data is transferred to the transceiver from an IBM PC
with the KPG-49D (M2) ver 6.30 or later, the destination data
(basic radio information) for each set can be modified. Nor-
mally, it is not necessary to modify the destination data be-
cause 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 for-
mat via the universal connector.
KPG-49D (M2) instruction manual parts No. : B62-1358-
XX
2. Firmware Programming Mode
2-1. Preface
Flash memory is mounted on the TK-480. This allows the
TK-480 to be upgraded when new features are released in
the future. (For details on how to obtain the firmware, con-
tact Customer Service.)
2-2. Connection procedure
Connect the TK-480 to the personal computer (IBM PC or
compatible) with the interface cable (KPG-36). (Connection
is the same as in the PC Mode.)
2-3. Programming
1. Start up the programming software (KPG-49D (M2) ver
6.30 or later), select “firmware program” in the “Pro-
gram” item, and press the Return key on the personal
computer. This starts up the firmware programmer.
2. The top screen is displayed. Press any key to advance to
the next screen.
3. Set the communications speed (normally, 57600 bps)
and communications port in the Setup item.
4. Set the firmware to be updated by File select (=F1).
5. Turn the TK-480 power ON with the [S] switch held
down. Hold the switch down for two seconds until the
display changes to “PROG 57600”. When “PROG
57600” appears, release your finger from the switch.
6. Check the connection between the TK-480 and the per-
sonal computer, and make sure that the TK-480 is in the
Program mode.
7. Press F10 on the personal computer. A window opens on
the display to indicate progress of writing. When the TK-
480 start to receive data. the [P] icon is blinking.
8. If writing ends successfully, the LED on the TK-480 light
and the checksum is displayed.
9. If you want to continue programming other TK-480, re-
peat steps 5 to 8.
Fig. 1
KPG-36
IBM-PC
KPG-49D (M2)
(ver 6.30 or later)

9
TK-480
REALIGNMENT
Notes:
•To start the Firmware Programmer from KPG-49D (M2)
ver 6.30 or later, the Fpro path must be set up by KPG-
49D (M2) (ver 6.30 or later) Setup.
•This mode cannot be entered if the Firmware Program-
ming mode is set to Disable in the Programming soft-
ware (KPG-49D (M2) ver 6.30 or later).
•When programming the firmware, it is recommend to
copy the data from the floppy disk to your hard disk be-
fore update the radio firmware.
Directry copying from the floppy disk to the radio may not
work because the access speed is too slow.
2-4. Function
1. If you press the [MON] switch (top of left side) while
“PROG 57600” is displayed, the checksum is displayed.
If you press the [MON] switch again while the checksum
is displayed, “PROG 57600” is redisplayed.
2. If you press the [LAMP] 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 [LAMP] 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 [LAMP]
switch again while “PROG 38400” is displayed, the dis-
play returns to “PROG 57600”.
Note:
Normally, write in the high-speed mode.

TK-480
PARTS LIST
10
✽New Parts. indicates safety critical components.
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
L: Scandinavia K:USA P:Canada
Y: PX (Far East, Hawaii) T:England E:Europe
Y:AAFES (Europe) X:Australia M:Other Areas
TK-480 (Y50-4790-21)
DISPLAY UNIT (X54-3210-11)
11AA02-3659-13 CABINET ASSY (16KEY)
22BA62-0981-04 PANEL ASSY
42CB09-0363-03 CAP (SP/MIC) ACSY
52A✽B38-0892-05 LCD ASSY
61BB43-1139-04 BADGE (KENWOOD)
92C✽B62-1771-00 INSTRUCTION MANUAL
10 3A ✽B72-2244-04 MODEL NAME PLATE
12 3B E04-0406-05 RF COAXIAL RECEPTACLE (SMA)
15 2B E23-1049-04 TERMINAL (ANT)
51 3A E23-1166-04 RELAY TERMINAL
16 2A E37-0672-05 FLAT CABLE (C0NT-TX-RX)
17 3A E37-0673-05 LEAD WIRE WITH CONNECTOR (PTT)
18 1A E37-0674-15 LEAD WIRE WITH CONNECTOR (SP)
19 3B E58-0440-05 SQUARE SOCKET (SP/MIC)
52 3A E72-0412-13 TERMINAL BLOCK
54 2A F10-2248-13 SHIELDING CASE (VC0)
55 2A F10-2253-03 SHIELDING PLATE (BAND PASS)
56 2A F10-2255-04 SHIELDING PLATE (P-MODULE)
57 2A F10-2310-03 SHIELDING PLATE (LCD)
-F20-1192-04 INSULATING SHEET
-F20-3303-04 INSULATING SHEET (MIC/GND)
21 1A G01-0881-04 COIL SPRING
22 1B G09-0418-05 KNOB SPRING (VOL,ENC)
23 1B G10-0799-04 FIBROUS SHEET (SP)
24 3A G11-0800-04 SHEET (PTT)
61 3A G11-2544-04 SHEET (CHASSIS)
62 2A G13-1731-04 CUSHION (LCD)
63 3A,3B G13-1762-04 CUSHION (VOL/CHASSIS)
64 3A G13-1834-04 CUSHION (TERMINAL)
26 3B G53-0811-03 PACKING (TOP)
25 1A G53-0841-02 PACKING (16KEY)
65 3A G53-1510-04 PACKING (BATT+)
66 3A G53-1520-24 PACKING (TERMINAL)
67 3B G53-1619-04 PACKING (SMA)
28 2D H12-3014-02 PACKING FIXTURE
29 3D H52-1096-12 ITEM CARTON CASE
31 1A J19-1572-04 HOLDER
68 2A J21-8321-03 HARDWARE FIXTURE (P-MODULE)
32 2C J29-0658-05 HOOK ACSY
33 3B J82-0045-05 FPC (VOL,ENC)
34 3B J82-0046-05 FPC (SOCKET)
38 1B K29-5157-03 KNOB (PTT)
39 1B K29-5158-03 KEY TOP (PTT)
40 1A K29-5165-03 LEVER KNOB
36 1B K29-5231-03 KNOB (VOL)
37 1B K29-5232-03 KNOB (ENC)
A2BN14-0809-04 CIRCULAR NUT (VOL,ENC)
B3BN30-2605-46 PAN HEAD MACHINE SCREW (ANT)
C3AN30-2610-46 PAN HEAD MACHINE SCREW (CASE)
D2AN67-2606-46
PAN HEAD SEMS SCREW W (P-MODULE)
F3AN79-2025-46 PAN HEAD TAPTITE SCREW (TERMINAL)
E2A,1B N83-2005-46 PAN HEAD TAPTITE SCREW (UNIT)
42 2C N99-2004-05 SCREW SET ACSY
44 3B R31-0617-05
VARIABLE RESISTOR (POWER SW/VOL)
S300 - S70-0414-05 TACT SWITCH
46 1A T07-0714-05 SPEAKER
47 2C T90-0636-25 WHIP ANTENNA (800MHZ) ACSY
MIC300 1A T91-0579-05 MIC ELEMENT
49 2B W02-1814-05 ENCODER
50 1D W09-0900-45 BATTERY ASSY ACSY
D301 B30-2019-05 LED (RE/GR) (BUSY/TX)
D305-310 B30-2171-05 LED (BACKLIGHT)
D305,306 B30-2171-05 LED (BACKLIGHT)
C301 CC73GCH1H470J CHIP C 47PF J
C302 C92-0560-05 CHIP-TAN 10UF 6.3WV
C304 CK73FB1C474K CHIP C 0.47UF K
C305 CC73GCH1H101J CHIP C 100PF J
C307 CK73GB1C104K CHIP C 0.10UF K
C308 CC73GCH1H101J CHIP C 100PF J
C309 CK73FB1C474K CHIP C 0.47UF K
C310 CK73GB1C104K CHIP C 0.10UF K
C311 CC73GCH1H470J CHIP C 47PF J
C312 CK73GB1C104K CHIP C 0.10UF K
C313 C92-0628-05 CHIP-TAN 10UF 10WV
C314 C92-0647-05 CHIP-TAN 3.3UF 4WV
C315 CC73GCH1H101J CHIP C 100PF J
C316,317 CC73GCH1H470J CHIP C 47PF J
C318 CC73GCH1H101J CHIP C 100PF J
C321-333 CC73GCH1H470J CHIP C 47PF J
C335-339 CC73GCH1H470J CHIP C 47PF J
C340 CK73GB1E153K CHIP C 0.015UF K
C341-344 CC73GCH1H470J CHIP C 47PF J
CN300 E40-5891-05 FLAT CABLE CONNECTOR (24P)
CN301 E40-5892-05 FLAT CABLE CONNECTOR (14P)
CN302 E40-5662-05 PIN ASSY SOCKET (SP)
CN303 E40-5887-05 PIN ASSY (PTT)
CN304 E40-5823-05 FLAT CABLE CONNECTOR (LCD)
L300,301 L92-0141-05 FERRITE CHIP
L302,303 L92-0138-05 FERRITE CHIP
L304,305 L92-0141-05 FERRITE CHIP
L306,307 L92-0138-05 FERRITE CHIP
L308,309 L92-0141-05 FERRITE CHIP
CP300,301 R90-0723-05 MULTI-COMP 47K X2
CP302 R90-0724-05 MULTI-COMP 1K X4
CP303 R90-0724-05 MULTI-COMP 1K X4
R300 RK73GB1J103J CHIP R 10K J 1/16W
R301 RK73FB2A101J CHIP R 100 J 1/10W
R302 RK73GB1J470J CHIP R 47 J 1/16W
R303 RK73GB1J471J CHIP R 470 J 1/16W
R304 RK73GB1J182J CHIP R 1.8K J 1/16W
R305 RK73GB1J104J CHIP R 100K J 1/16W
R306 R92-1252-05 CHIP R 0 OHM
New Desti-
parts nation
Ref. No.
Address Parts No. Description
New Desti-
parts nation
Ref. No.
Address Parts No. Description
TK-480
DISPLAY UNIT (X54-3210-11)

TK-480
PARTS LIST
11
New Desti-
parts nation
New Desti-
parts nation
R307 RK73GB1J821J CHIP R 820 J 1/16W
R308 RK73GB1J153J CHIP R 15K J 1/16W
R309 R92-1252-05 CHIP R 0 OHM
R310 RK73GB1J331J CHIP R 330 J 1/16W
R311 RK73GB1J102J CHIP R 1.0K J 1/16W
R312 RK73GB1J104J CHIP R 100K J 1/16W
R313,314 RK73GB1J102J CHIP R 1.0K J 1/16W
R315 RK73GB1J104J CHIP R 100K J 1/16W
R316 RK73GB1J473J CHIP R 47K J 1/16W
R317 RK73GB1J472J CHIP R 4.7K J 1/16W
R318 RK73GB1J104J CHIP R 100K J 1/16W
R319 RK73GB1J820J CHIP R 82 J 1/16W
R320,321 RK73GB1J820J CHIP R 82 J 1/16W
R324 RK73GB1J102J CHIP R 1.0K J 1/16W
R325 RK73GB1J102J CHIP R 1.0K J 1/16W
R326 RK73GB1J124J CHIP R 120K J 1/16W
R327 RK73GB1J563J CHIP R 56K J 1/16W
R328 RK73GB1J124J CHIP R 120K J 1/16W
R331 RK73GB1J103J CHIP R 10K J 1/16W
R332 RK73GB1J272J CHIP R 2.7K J 1/16W
R333 RK73GB1J103J CHIP R 10K J 1/16W
R336 R92-1252-05 CHIP R 0 OHM
R337 RK73GB1J472J CHIP R 4.7K J 1/16W
R338-341 RK73GB1J101J CHIP R 100 J 1/16W
S301-303 S70-0457-05 TACT SWITCH (PTT)
D300 NNCD6.8G ZENER DIODE
D302 1SS373 DIODE
D303 015AZ2.4-X ZENER DIODE
D304 MA2S111 DIODE
D315 IMN10 DIODE
D316 MA2S111 DIODE
D317 MA2S111 DIODE
D318 IMN10 DIODE
D319-321 015AZ6.8 ZENER DIODE
IC300 TDA7053AT IC (AUDIO AMP)
IC301 TC74HC4017AF IC (COUNTER)
Q300 2SJ243 FET
Q301 UPA672T FET
Q302-304 2SC4617(S) TRANSISTOR
Q305 2SB798(DL,DK) TRANSISTOR
Q306 2SC4617(S) TRANSISTOR
Q307 2SB1132(Q,R) TRANSISTOR
Q308 UPA672T FET
Q309 2SC4617(S) TRANSISTOR
Q310 2SK1824 FET
TH300 TN10-3S154JT THERMISTOR
C1,2 CK73GB1E103K CHIP C 0.010UF K
C3,4 CC73GCH1H101J CHIP C 100PF J
C5 CK73GB1E103K CHIP C 0.010UF K
C6 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C7 CC73GCH1H101J CHIP C 100PF J
C8 CK73GB1E223K CHIP C 0.022UF K
C9 CK73GB1C104K CHIP C 0.10UF K
C10 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C11 CK73GB1C104K CHIP C 0.10UF K
C12,13 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C14 C92-0576-05 CHIP-TAN 1.0UF 6.3WV
C15 CC73GCH1H100D CHIP C 10PF D
C16,17 CC73GCH1H101J CHIP C 100PF J
C18 CK73GB1C104K CHIP C 0.10UF K
C19-23 CC73GCH1H101J CHIP C 100PF J
C24 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C25 CK73FB1A105K CHIP C 1.0UF K
C26 CK73GB1E123K CHIP C 0.012UF K
C27 CK73GB1C104K CHIP C 0.10UF K
C28-30 CC73GCH1H101J CHIP C 100PF J
C31 CK73GB1C104K CHIP C 0.10UF K
C32 CK73GB1H472K CHIP C 4700PF K
C33 CK73GB1H471K CHIP C 470PF K
C34 C92-0560-05 CHIP-TAN 10UF 6.3WV
C35 CK73GB1C333K CHIP C 0.033UF K
C36 CC73GCH1H820J CHIP C 82PF J
C37 C92-0560-05 CHIP-TAN 10UF 6.3WV
C38 CC73GCH1H101J CHIP C 100PF J
C39 CC73GCH1H221J CHIP C 220PF J
C40 CC73GCH1H101J CHIP C 100PF J
C41 CK73FB1C334K CHIP C 0.33UF K
C42 CK73GB1E103K CHIP C 0.010UF K
C43 C92-0513-05 CHIP-TAN 3.3UF 6.3WV
C44 C92-0662-05 CHIP-TAN 15UF 6.3WV
C45 CC73GCH1H220J CHIP C 22PF J
C46 CC73GCH1H221J CHIP C 220PF J
C47 CK73GB1E223K CHIP C 0.022UF K
C48 CC73GCH1H220J CHIP C 22PF J
C49,50 CK73GB1H102K CHIP C 1000PF K
C51 CK73GB1E223K CHIP C 0.022UF K
C52-54 CK73GB1H102K CHIP C 1000PF K
C55 CC73GCH1H150J CHIP C 15PF J
C56 CK73GB1H222K CHIP C 2200PF K
C57 CK73GB1E153K CHIP C 0.015UF K
C58 CK73GB1C104K CHIP C 0.10UF K
C59 CC73GCH1H101J CHIP C 100PF J
C60 CC73GCH1H100D CHIP C 10PF D
C62 CK73GB1E103K CHIP C 0.010UF K
C63 CC73GCH1H101J CHIP C 100PF J
C64 CC73GCH1H271J CHIP C 270PF J
C65 CK73GB1H103K CHIP C 0.010UF K
C66 CK73GB1C104K CHIP C 0.10UF K
C67 CK73GB1H122J CHIP C 1200PF J
C69 C92-0559-05 CHIP-TAN 6.8UF 6.3WV
C70-72 CK73GB1E103K CHIP C 0.010UF K
C73 CC73GCH1H101J CHIP C 100PF J
C74 CK73GB1C104K CHIP C 0.10UF K
C75 CK73GB1C333K CHIP C 0.033UF K
C76 CK73GB1C104K CHIP C 0.10UF K
C77 CK73GB1H562J CHIP C 5600PF J
C78 CK73GB1E103K CHIP C 0.010UF K
C79 CC73GCH1H121J CHIP C 120PF J
C80 CK73GB1C683K CHIP C 0.068UF K
C81 CC73GCH1H101J CHIP C 100PF J
C82,83 CK73GB1H562J CHIP C 5600PF J
C84 CC73GCH1H150J CHIP C 15PF J
C85 CK73GB1H272J CHIP C 2700PF J
C86 CK73GB1C333K CHIP C 0.033UF K
C87 CC73GCH1H030C CHIP C 3.0PF C
C88 CC73GCH1H101J CHIP C 100PF J
DISPLAY UNIT (X54-3210-11)
TX-RX UNIT (X57-5630-10)
Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description
TX-RX UNIT (X57-5630-10)

TK-480
PARTS LIST
12
New Desti-
parts nation
New Desti-
parts nation
C89,90 CK73GB1H272J CHIP C 2700PF J
C91 CK73GB1E103K CHIP C 0.010UF K
C92 CK73GB1C104K CHIP C 0.10UF K
C93 CC73GCH1H151J CHIP C 150PF J
C94 CC73GCH1H101J CHIP C 100PF J
C95 C92-0504-05 CHIP-TAN 0.68UF 20WV
C96 CK73GB1H122K CHIP C 1200PF K
C97 CK73GB1H102K CHIP C 1000PF K
C98 CC73GCH1H030C CHIP C 3.0PF C
C99 CC73GCH1H1R5B CHIP C 1.5PF B
C100 CC73GCH1H391J CHIP C 390PF J
C101 C92-0560-05 CHIP-TAN 10UF 6.3WV
C102 CK73GB1C104K CHIP C 0.10UF K
C103,104 CC73GCH1H101J CHIP C 100PF J
C105 CK73GB1C473K CHIP C 0.047UF K
C106-108 CK73GB1C104K CHIP C 0.10UF K
C109 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C110 CC73GCH1H1R5B CHIP C 1.5PF B
C111,112 CK73GB1C104K CHIP C 0.10UF K
C113 CK73GB1C473K CHIP C 0.047UF K
C114,115 CK73GB1H472K CHIP C 4700PF K
C116 CK73GB1H102K CHIP C 1000PF K
C117 CC73GCH1H470J CHIP C 47PF J
C118 CK73GB1E103K CHIP C 0.010UF K
C119 CC73GCH1HR75C CHIP C 0.75PF C
C120 CC73GCH1H101J CHIP C 100PF J
C121 CK73GB1E153K CHIP C 0.015UF K
C122 CC73GCH1H1R5C CHIP C 1.5PF C
C123 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C124 CK73GB1E103K CHIP C 0.010UF K
C125 CK73GB1H102K CHIP C 1000PF K
C126 CK73GB1C104K CHIP C 0.10UF K
C127-129 CC73GCH1H101J CHIP C 100PF J
C130 CC73GCH1H100D CHIP C 10PF D
C131 CC73GCH1H101J CHIP C 100PF J
C132 CC73GCH1H010C CHIP C 1.0PF C
C133 CC73GCH1H101J CHIP C 100PF J
C134 CC73GCH1H010B CHIP C 1.0PF B
C135 CC73GCH1H101J CHIP C 100PF J
C136 CC73GCH1H030C CHIP C 3.0PF C
C137 CC73GCH1H101J CHIP C 100PF J
C138 CK73GB1E103K CHIP C 0.010UF K
C139 CC73GCH1H030C CHIP C 3.0PF C
C140 CK73FB1A105K CHIP C 1.0UF K
C141 CK73GB1H472K CHIP C 4700PF K
C142,143 CC73GCH1H101J CHIP C 100PF J
C144 CK73GB1C273K CHIP C 0.027UF K
C145,146 CC73GCH1H101J CHIP C 100PF J
C147,148 CK73HB1C103K CHIP C 0.010UF K
C149 CC73GCH1H040C CHIP C 4.0PF C
C150,151 CC73GCH1H101J CHIP C 100PF J
C152 CC73GCH1H020C CHIP C 2.0PF C
C153 CC73GCH1H101J CHIP C 100PF J
C154 CK73GB1C104K CHIP C 0.10UF K
C155 CC73GCH1H101J CHIP C 100PF J
C156 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C157 CC73GCH1H680J CHIP C 68PF J
C158 CC73GCH1H270J CHIP C 27PF J
C159 CK73FB1H563K CHIP C 0.056UF K
C160,161 CC73GCH1H101J CHIP C 100PF J
C162 CC73GCH1H270J CHIP C 27PF J
C163 CK73FB1C474K CHIP C 0.47UF K
C164,165 CC73GCH1H101J CHIP C 100PF J
C166 CC73GCH1H010C CHIP C 1.0PF C
C167 CC73GCH1H101J CHIP C 100PF J
C168 CC73GCH1H020C CHIP C 2.0PF C
C169-172 CC73GCH1H101J CHIP C 100PF J
C173 CC73GCH1H020C CHIP C 2.0PF C
C174 CC73GCH1H1R5C CHIP C 1.5PF C
C175 CC73GCH1H030C CHIP C 3.0PF C
C176 CC73GCH1H010C CHIP C 1.0PF C
C177 CK73GB1C473K CHIP C 0.047UF K
C178-180 CC73GCH1H101J CHIP C 100PF J
C181,182 CK73GB1E103K CHIP C 0.010UF K
C183 CC73GCH1H101J CHIP C 100PF J
C184 CC73GCH1H030C CHIP C 3.0PF C
C185 CC73GCH1H101J CHIP C 100PF J
C186 CC73GCH1H1R5C CHIP C 1.5PF C
C187 CC73GCH1H101J CHIP C 100PF J
C188-191 CC73GCH1H470J CHIP C 47PF J
C192 CC73GCH1H101J CHIP C 100PF J
C193 CC73GCH1H020C CHIP C 2.0PF C
C194-199 CC73GCH1H101J CHIP C 100PF J
C200 CK73GB1E103K CHIP C 0.010UF K
C201 CC73GCH1H470J CHIP C 47PF J
C202 CK73GB1E103K CHIP C 0.010UF K
C203 CC73GCH1H470J CHIP C 47PF J
C204 C92-0003-05 CHIP-TAN 0.47UF 25WV
C205,206 CK73HB1C103K CHIP C 0.010UF K
C207 CK73GB1C104K CHIP C 0.10UF K
C208,209 CC73GCH1H101J CHIP C 100PF J
C261,262 CK73HB1C103K CHIP C 0.010UF K
C263 C92-0628-05 CHIP-TAN 10UF 10WV
CN1 E40-5823-05 FLAT CABLE CONNECTOR (10P)
CN2 E40-9517-05 PIN ASSY SOCKET (4P)
CN3 E40-5890-05 FLAT CABLE CONNECTOR (24P)
CN4-9 E23-1002-05 TERMINAL
CN10 E23-0342-05 TEST TERMINAL
CN11,12 E23-1002-05 TERMINAL
F1 F53-0130-05 FUSE (3A)
F1 F53-0217-05 FUSE (3A)
CD1 L79-1072-05 TUNING COIL
CF1,2 L72-0924-05 CERAMIC FILTER (455KHZ)
L1 L92-0149-05 FERRITE CHIP
L3 L40-1095-34 SMALL FIXED INDUCTOR (1UH)
L4 L40-4791-37 SMALL FIXED INDUCTOR (4.700UH)
L5 L92-0138-05 FERRITE CHIP
L6,7 L40-3985-45 SMALL FIXED INDUCTOR (0.39UH)
L8 L92-0138-05 FERRITE CHIP
L9 L40-1075-92 SMALL FIXED INDUCTOR (10NH)
L10 L40-8265-92 SMALL FIXED INDUCTOR (8.2NH)
L11 L79-1464-05 DIELECTRIC FILTER (860MHZ)
L12 L92-0138-05 FERRITE CHIP
L13,14 L40-1075-92 SMALL FIXED INDUCTOR (10NH)
L15 L40-5663-92 SMALL FIXED INDUCTOR (5.6NH)
L16 L92-0138-05 FERRITE CHIP
L17 L40-1075-92 SMALL FIXED INDUCTOR (10NH)
L18 L40-2275-92 SMALL FIXED INDUCTOR (22NH)
TX-RX UNIT (X57-5630-10)
Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description

TK-480
PARTS LIST
13
New Desti-
parts nation
New Desti-
parts nation
L19 L40-1075-92 SMALL FIXED INDUCTOR (10NH)
L20 L79-1465-05 DIELECTRIC FILTER (860MHZ)
L21 L40-6865-92 SMALL FIXED INDUCTOR (6.8NH)
L22,23 L92-0138-05 FERRITE CHIP
L24 L40-6865-92 SMALL FIXED INDUCTOR (6.8NH)
L25 L92-0149-05 FERRITE CHIP
L26 L92-0138-05 FERRITE CHIP
L27 L40-6875-54 SMALL FIXED INDUCTOR (68NH)
L28 L33-0761-05 SMALL FIXED INDUCTOR
L29 L40-1075-92 SMALL FIXED INDUCTOR (10NH)
L30 L79-1468-05 FILTER MODULE (870MHZ)
L31 L33-0760-05 SMALL FIXED INDUCTOR
L32 L40-6875-54 SMALL FIXED INDUCTOR (68NH)
L34 L40-8265-92 SMALL FIXED INDUCTOR (8.2NH)
L35 L92-0138-05 FERRITE CHIP
L53-56 L92-0138-05 FERRITE CHIP
X1 L77-1760-15 CRYSTAL RESONATOR (44.395MHZ)
X2 L77-1699-15 VCXO (16.8MHZ)
X3 L77-1708-05
CRYSTAL RESONATOR (3.579545MHZ)
X4 L78-0462-05 RESONATOR (9.8304MHZ)
XF1 L71-0501-05 MCF (44.85MHZ)
CP1 R90-0718-05 MULTI-COMP 4.7K X4
CP3 R90-0743-05 MULTIPLE RESISTOR
CP5 R90-0743-05 MULTIPLE RESISTOR
CP6-21 R90-0741-05 MULTIPLE RESISTOR
CP22 R90-0743-05 MULTIPLE RESISTOR
CP24 R90-0743-05 MULTIPLE RESISTOR
R1,2 RK73GB1J104J CHIP R 100K J 1/16W
R3 RK73GB1J473J CHIP R 47K J 1/16W
R4 RK73GB1J154J CHIP R 150K J 1/16W
R5 RK73GB1J104J CHIP R 100K J 1/16W
R6 RK73GB1J184J CHIP R 180K J 1/16W
R7 RK73GB1J104J CHIP R 100K J 1/16W
R8 RK73GB1J183J CHIP R 18K J 1/16W
R9 RK73GB1J154J CHIP R 150K J 1/16W
R10 RK73GB1J103J CHIP R 10K J 1/16W
R11 RK73GB1J473J CHIP R 47K J 1/16W
R12 RK73GB1J104J CHIP R 100K J 1/16W
R13 RK73GB1J683J CHIP R 68K J 1/16W
R14 RK73GB1J394J CHIP R 390K J 1/16W
R15 RK73GB1J472J CHIP R 4.7K J 1/16W
R16 RK73GB1J104J CHIP R 100K J 1/16W
R17 RK73GB1J473J CHIP R 47K J 1/16W
R18 RK73GB1J332J CHIP R 3.3K J 1/16W
R19 RK73GB1J152J CHIP R 1.5K J 1/16W
R20 RK73GB1J683J CHIP R 68K J 1/16W
R21 RK73GB1J154J CHIP R 150K J 1/16W
R22 RK73GB1J182J CHIP R 1.8K J 1/16W
R23 RK73GB1J563J CHIP R 56K J 1/16W
R24 RK73GB1J274J CHIP R 270K J 1/16W
R25 RK73GB1J473J CHIP R 47K J 1/16W
R26 RK73GB1J332J CHIP R 3.3K J 1/16W
R27 RK73GB1J222J CHIP R 2.2K J 1/16W
R28 RK73GB1J220J CHIP R 22 J 1/16W
R29 RK73GB1J183J CHIP R 18K J 1/16W
R31 RK73GB1J472J CHIP R 4.7K J 1/16W
R32 R92-1252-05 CHIP R 0 OHM
R33 RK73GB1J123J CHIP R 12K J 1/16W
R34 RK73GB1J334J CHIP R 330K J 1/16W
R35 RK73GB1J101J CHIP R 100 J 1/16W
R36 RK73GB1J472J CHIP R 4.7K J 1/16W
R37 RK73GB1J104J CHIP R 100K J 1/16W
R38 RK73GB1J151J CHIP R 150 J 1/16W
R39 RK73GB1J560J CHIP R 56 J 1/16W
R40 RK73GB1J272J CHIP R 2.7K J 1/16W
R41 RK73GB1J471J CHIP R 470 J 1/16W
R42,43 RK73GB1J102J CHIP R 1.0K J 1/16W
R44 R92-0670-05 CHIP R 0 OHM
R45 RN73GH1J913D CHIP R 91K D 1/16W
R46 RN73GH1J683D CHIP R 68K D 1/16W
R47 RN73GH1J913D CHIP R 91K D 1/16W
R48 RN73GH1J333D CHIP R 33K D 1/16W
R49 RK73GB1J684J CHIP R 680K J 1/16W
R50 RK73GB1J564J CHIP R 560K J 1/16W
R51 RK73GB1J331J CHIP R 330 J 1/16W
R53 RN73GH1J274D CHIP R 270K D 1/16W
R54 RK73GB1J334J CHIP R 330K J 1/16W
R55 RN73GH1J913D CHIP R 91K D 1/16W
R56 RK73GB1J223J CHIP R 22K J 1/16W
R57 RK73GB1J334J CHIP R 330K J 1/16W
R58 RN73GH1J682D CHIP R 6.8K D 1/16W
R59 RK73GB1J154J CHIP R 150K J 1/16W
R60 RK73GB1J101J CHIP R 100 J 1/16W
R61 RK73GB1J155J CHIP R 1.5M J 1/16W
R62 RK73GB1J101J CHIP R 100 J 1/16W
R63 RN73GH1J683D CHIP R 68K D 1/16W
R64 RK73GB1J474J CHIP R 470K J 1/16W
R65 RK73GB1J560J CHIP R 56 J 1/16W
R66 RN73GH1J682D CHIP R 6.8K D 1/16W
R67,68 RK73GB1J101J CHIP R 100 J 1/16W
R69 RK73GB1J153J CHIP R 15K J 1/16W
R70 RK73GB1J153J CHIP R 15K J 1/16W
R71 RK73GB1J224J CHIP R 220K J 1/16W
R72 RK73GB1J152J CHIP R 1.5K J 1/16W
R73 RK73GB1J103J CHIP R 10K J 1/16W
R74 RK73GB1J223J CHIP R 22K J 1/16W
R75 RK73GB1J152J CHIP R 1.5K J 1/16W
R76 RK73GB1J103J CHIP R 10K J 1/16W
R77 RK73GB1J153J CHIP R 15K J 1/16W
R78 RK73GB1J102J CHIP R 1.0K J 1/16W
R79 RK73GB1J473J CHIP R 47K J 1/16W
R80 RK73GB1J394J CHIP R 390K J 1/16W
R81 RK73GB1J102J CHIP R 1.0K J 1/16W
R82 RK73GB1J333J CHIP R 33K J 1/16W
R83 R92-1252-05 CHIP R 0 OHM
R84 RK73GB1J473J CHIP R 47K J 1/16W
R85 RK73GB1J681J CHIP R 680 J 1/16W
R86 RK73GB1J154J CHIP R 150K J 1/16W
R87 RK73GB1J470J CHIP R 47 J 1/16W
R88 RK73GB1J220J CHIP R 22 J 1/16W
R89 RK73GB1J103J CHIP R 10K J 1/16W
R90 RK73GB1J104J CHIP R 100K J 1/16W
R91 RK73GB1J100J CHIP R 10 J 1/16W
R92,93 RK73GB1J150J CHIP R 15 J 1/16W
R94 RK73GB1J272J CHIP R 2.7K J 1/16W
R95 RK73GB1J150J CHIP R 15 J 1/16W
R96 RK73GB1J223J CHIP R 22K J 1/16W
R97 RK73GB1J104J CHIP R 100K J 1/16W
R98 RK73GB1J184J CHIP R 180K J 1/16W
TX-RX UNIT (X57-5630-10)
Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description

TK-480
PARTS LIST
14
New Desti-
parts nation
New Desti-
parts nation
R99 RK73GB1J121J CHIP R 120 J 1/16W
R100 RK73GB1J820J CHIP R 82 J 1/16W
R101 RK73GB1J223J CHIP R 22K J 1/16W
R102 RK73GB1J182J CHIP R 1.8K J 1/16W
R103 RK73GB1J102J CHIP R 1.0K J 1/16W
R104 RK73HB1J102J CHIP R 1.0K J 1/16W
R105 RK73GB1J122J CHIP R 1.2K J 1/16W
R106 RK73GB1J473J CHIP R 47K J 1/16W
R107 RK73GB1J103J CHIP R 10K J 1/16W
R108 RK73GB1J682J CHIP R 6.8K J 1/16W
R109 RK73GB1J470J CHIP R 47 J 1/16W
R110 RK73GB1J473J CHIP R 47K J 1/16W
R111 RK73GB1J223J CHIP R 22K J 1/16W
R112 RK73GB1J103J CHIP R 10K J 1/16W
R113 RK73GB1J101J CHIP R 100 J 1/16W
R114 RK73GB1J152J CHIP R 1.5K J 1/16W
R115 RK73GB1J681J CHIP R 680 J 1/16W
R116 R92-1368-05 CHIP R 0 OHM
R117 RK73GB1J470J CHIP R 47 J 1/16W
R118 R92-1252-05 CHIP R 0 OHM
R120 RK73HB1J102J CHIP R 1.0K J 1/16W
R121 RK73GB1J473J CHIP R 47K J 1/16W
R122 R92-1252-05 CHIP R 0 OHM
R123 RK73HB1J102J CHIP R 1.0K J 1/16W
R124,125 RK73HB1J473J CHIP R 47K J 1/16W
R126 RK73GB1J103J CHIP R 10K J 1/16W
R127-129 RK73EB2ER39K CHIP R 0.39 K 1/4W
R130-135 RN73GH1J154D CHIP R 150K D 1/16W
R136,137 RK73GB1J271J CHIP R 270 J 1/16W
R138 RK73HB1J103J CHIP R 10K J 1/16W
R139 R92-1368-05 CHIP R 0 OHM
R140 RK73GB1J103J CHIP R 10K J 1/16W
R141,142 RK73GB1J104J CHIP R 100K J 1/16W
R143 RK73GB1J105J CHIP R 1.0M J 1/16W
R144 RK73GB1J473J CHIP R 47K J 1/16W
R145 R92-1252-05 CHIP R 0 OHM
R146 RK73GB1J222J CHIP R 2.2K J 1/16W
R147 R92-1252-05 CHIP R 0 OHM
R148 RK73GB1J223J CHIP R 22K J 1/16W
R149 RK73HB1J473J CHIP R 47K J 1/16W
R150 RK73HB1J102J CHIP R 1.0K J 1/16W
R151 RK73GB1J102J CHIP R 1.0K J 1/16W
R152 RK73GB1J332J CHIP R 3.3K J 1/16W
R153 RK73GB1J123J CHIP R 12K J 1/16W
R154 RK73GB1J221J CHIP R 220 J 1/16W
R155 RK73GB1J101J CHIP R 100 J 1/16W
R156 RK73GB1J103J CHIP R 10K J 1/16W
R157 RK73GB1J102J CHIP R 1.0K J 1/16W
R158 RK73GB1J223J CHIP R 22K J 1/16W
R159,160 RK73GB1J102J CHIP R 1.0K J 1/16W
R161,162 RK73GB1J184J CHIP R 180K J 1/16W
R163 RK73GB1J104J CHIP R 100K J 1/16W
R164 RK73GB1J473J CHIP R 47K J 1/16W
R165 RK73GB1J150J CHIP R 15 J 1/16W
R167 RK73GB1J123J CHIP R 12K J 1/16W
R168 RK73GB1J333J CHIP R 33K J 1/16W
R169 RK73GB1J223J CHIP R 22K J 1/16W
R170 RK73GB1J473J CHIP R 47K J 1/16W
R171 RK73GB1J823J CHIP R 82K J 1/16W
R200-207 RK73HB1J102J CHIP R 1.0K J 1/16W
R211 RK73HB1J103J CHIP R 10K J 1/16W
R218 RK73HB1J473J CHIP R 47K J 1/16W
R248 R92-1252-05 CHIP R 0 OHM
R250 R92-1252-05 CHIP R 0 OHM
R259 R92-1252-05 CHIP R 0 OHM
R276 R92-1252-05 CHIP R 0 OHM
R297,298 RK73HB1J473J CHIP R 47K J 1/16W
R408 RK73HB1J473J CHIP R 47K J 1/16W
R417 RK73GB1J474J CHIP R 470K J 1/16W
R418 RK73GB1J104J CHIP R 100K J 1/16W
R419-422 R92-1252-05 CHIP R 0 OHM
R423 RK73GB1J473J CHIP R 47K J 1/16W
D1 1SR154-400 DIODE
D2 MA2S111 DIODE
D3 MA742 DIODE
D4,5 MA2S077 DIODE
D6 UDZS4.7B ZENER DIODE
D7 HVU131 DIODE
D8 MA2S111 DIODE
D9,10 MA2S077 DIODE
D11 MA742 DIODE
D17,18 DA221 DIODE
IC1 TA75W01FU IC (BUFFER AMP)
IC2 RN5VL42C IC (VOLTAGE DETECTOR/RESET)
IC3 TC75W51FU IC (SUMMING AMP)
IC4 M62364FP IC (D/A CONVERTER)
IC5 S-81350HG-KD IC (VOLTAGE REGULATOR/5M)
IC6 NJU7201U50 IC (VOLTAGE REGULATOR/5V)
IC7 TK11250BM IC (VOLTAGE REGULATOR/5C)
IC8 TC75W51FU IC (BUFFER AMP)
IC9 TA31136FN IC (FM IF SYSTEM)
IC10 TA75W01FU IC (ACTIVE FILTER)
IC11 SA7025DK IC (PLL SYSTEM)
IC12 TC35453F IC (AUDIO PROCESSOR)
IC13 LC73872M IC (DTMF DECODER)
IC14 KCH31 HIC (VCO SYSTEM)
IC15 30622M8A-4F9GP IC (MICROPROCESSOR)
IC16 AT2408N10SI2.5 IC (EEPROM)
IC17 AT29C020-90TI IC (AND GATE)
IC17 W29C020C90 IC (AND GATE)
IC18,19 BU4094BCFV IC (SHIFT REGISTER)
IC21 NJM2904V IC (COMPARATOR)
IC23 TA75S01F IC (ACTIVE FILTER)
IC30 M68757L IC (POWER MODULE)
Q1 2SJ243 FET
Q2 2SA1832(GR) TRANSISTOR
Q3,4 2SC4617(S) TRANSISTOR
Q5 2SC4619 TRANSISTOR
Q6 3SK318 FET
Q7 2SK1824 FET
Q8 2SC5108(Y) TRANSISTOR
Q9 3SK274 FET
Q10,11 2SC5108(Y) TRANSISTOR
Q12 2SC4988 TRANSISTOR
Q13 2SK1824 FET
Q14 DTC114EE DIGITAL TRANSISTOR
Q15 DTA144EE DIGITAL TRANSISTOR
Q16 DTC114EE DIGITAL TRANSISTOR
Q17 2SC5108(Y) TRANSISTOR
TX-RX UNIT (X57-5630-10)
Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description

TK-480
PARTS LIST
15
New Desti-
parts nation
New Desti-
parts nation
Q18 2SK1824 FET
Q19 2SC4617(S) TRANSISTOR
Q20 DTC144EE DIGITAL TRANSISTOR
Q21-23 2SK1824 FET
TH2 157-503-65001 THERMISTOR
TX-RX UNIT (X57-5630-10)
Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description

16
TK-480
EXPLODED VIEW
AB
1
2
3
A:N14-0809-04
BM2.6 x 5 : N30-2605-46
CM2.6 x 10 : N30-2610-46
DM2.6 x 6 : N67-2606-46
EM2 x 5 : N83-2005-46
FM2 x 2.5 : N79-2025-46
37
36
23
38
39
6
1
62
57
5
16
68
55
54
15
33
56
63
63
51
51
52
64
64
66
10
61
12
65
49 44
2
26
34
24
17
19
40
31
25
MIC300
46
18
22x2
21x2
A
C
C
A
Ex2
Display unit (A/2)
Ex2
Ex2
F
F
701 (Chassis)
S/No. label
E
E
703
E
D
D
EE
E
E
Bx2
TX-RX unit
Display unit
(B/2)
When you repair or exchange
the square socket (19), please
exchange FPC (34) as well.
When you repair or
exchange the display
unit, please exchange
the sheet (24) as well.
67
Parts with the exploded numbers larger than 700 are not supplied.

17
TK-480
PACKING
CD
1
2
3
50 Battery assy
(W09-0900-45)
Insulation sheet
28 Packing fixture
(H12-3014-02)
47 Whip antenna
(T90-0636-25)
29 Item carton case
(H52-1096-12)
9 Instruction manual
(B62-1771-00)
4 Cap (SP/MIC)
(B09-0363-03)
42 Screw set
(N99-2004-05)
32 Hook
(J29-0658-05)

18
TK-480
ADJUSTMENT
Test Mode
■Test mode operating features
This transceiver has a test mode. To enter test mode,
press [A] key and turn power on. Hold [A] key until test
channel No. and test signalling No. appears on LCD.
Test
mode can be inhibited by programming. To exit test mode,
switch the power on again. The following functions are avail-
able in test mode.
•Controls
Controls “FCN”appears “FCN”not appears
[PTT] Used when making a Used when making
transmission. a transmission.
[AUX] Unused Unused.
[MON] Monitor ON and OFF. Monitor ON and OFF.
[LAMP] Lights the lamp for five Unused.
seconds.
Lighting is extended for
a further five seconds by
pressing any key while
the lamp is lit.
[S] MSK 1200 bps and Sets to the Tuning
2400 bps mode.
[A] Function OFF Function ON.
[B] Compander function RF power HIGH and
ON and OFF. LOW.
[C] Beat shift ON and OFF Changes group.
[0] to [9], Used as the DTMF Used as the DTMF
and [#], keypad. If a key is keypad. If a key is
[*]pressed during trans- pressed during trans-
mission, the DTMF mission, the DTMF
corresponding to the corresponding to the
key that was pressed key that was pressed
is sent. is sent.
[ENCODER] Changes system. Changes system.
Note : If a [S], [A], [B], [C] key is pressed during transmis-
sion, the DTMF corresponding to the key that was pressed
is sent.
•LCD indicator
“SCN”Unused
“ ” Lights at Compander ON.
“LO”Lights at RF Power Low.
“P”Unused
“MON”Lights at moniter ON.
“SVC”Unused
“”Lights at MSK 2400 bps.
•LED indicator
Red LED Lights during transmission. Blinks at the
low battery voltage warning.
Green LED Lights when there is a carrier.
•Sub LCD indicator
“FCN”Appears at Function ON.
■Frequency and signalling
The set has been adjusted for the frequencies shown in
the following table. When required. re-adjust them following
the adjustment procedure to obtain the frequencies you
want in actual operation.
Frequency (MHz)
SYS No. RX (TX : TA) TX
1851.0500 806.0500
2851.5500 806.5500
3860.0000 815.0000
4860.5000 815.5000
5865.9875 820.9875
6869.4000 824.4000
7869.9000 824.9000
8855.4000 810.4000
9865.6000 820.6000
10 867.5000 822.5000
11~16 ––
Signalling
Group No. RX TX
1None None
2None 100Hz square
3LTR data LTR data
4QT 67.0Hz QT 67.0Hz
5QT 151.4Hz QT 151.4Hz
6QT 210.7Hz QT 210.7Hz
7QT 250.3Hz QT 250.3Hz
8DQT D023N DQT D023N
9DQT D754I DQT D754I
10 DTMF DEC, (159D) DTMF DEC, (159D)
11 None DTMF tone 9
12 None None
13 Single tone 1200Hz Single tone 1200Hz
14 None MSK
15 MSK code MSK code
•Preparations for tuning the transceiver
Before attempting to tune the transceiver, connect the
unit to a suitable power supply.
Whenever the transmitter is turned, the unit must be
connected to a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with a
16Ωdummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.

19
TK-480
■Tuning mode
ADJUSTMENT
FREQ 1
Adjustment (1~256)Adjustment item
Panel test mode
System/Group No.
FREQ : Frequency adj.
HPOW : High power
THPW : High power (T/A)
LPOW : Low power
TLPW : Low power (T/A)
BAL : DQT balance
MAX : Max deviation L MAX
TMAX : Max deviation (T/A)
FQT : Fine QT
FDQT : Fine DQT
FLTR : LTR
DTMF : DTMF deviation
FMSK : MSK deviation
TONE : Tone deviation
BATT : Battery
SQL : Squelch
[S]
[C]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[S]
[C]
[C]
[C]
[C]
[C]
[C]
[C]
[C]
[C]
[C]
[C]
[C]
[C]
C MAX H MAX
[C]
[C] [C]
[C]
[A]
[A]
[C]
[C]
NMAX : Max deviation (NPSPAC)
L TMAX C TMAX H TMAX
[C] [C]
[C]
[A]
[A]
L NMAX C NMAX H NMAX
[C] [C]
[C]
[A]
[A]
IC30
IC14
VC
1–1
Group No.System No.
•Transceiver tuning
(To place transceiver in tuning mode)
System appears on LCD. Set system according to tuning
requirements.
LCD display (Test mode)
Press [S], now in tuning mode. Use [ B] button to write
tuning data through tuning modes, and channel selector
knob to adjust tuning requirements (1 to 256 appears on
LCD).
Use [C ] button to select the adjustment item through
tuning modes. Use [A] button to adjust 3 point tuning.
LCD display (Tuning mode)
3-point tuning frequency (MHz)
Test CH RX TX
Low 851.05000 806.05000
Center 860.50000 815.50000
High 869.90000 824.90000
Adjustment Points
TX-RX unit (X57-5630-10) Component side view