Kenwood TM-621A User manual

COO/ANAD

144/220MHz

DUAL

BANDER

TM-621A

144/440MHz

DUAL

BANDER

IM-721A

144/430MHz

DUAL

BANDER

IM-721A

TM-721E

INSTRUCTION

MANUAL

KENWOOD

CORPORATION

©PRINTED

JAPAN

BS0-8225-10(K,

T.W)(T)

89/12

1110987654321

88/12111098

Thank

you

for

purchasing

this

new

transceiver.

IMPORTANT:

Please

read

this

instruction

manual

carefully

before

placing

your

transceiver

service.

SAVE

THIS

INSTRUCTION

MANUAL.

CAUTION:

Long

transmission

extended

operation

the

power

mode

might

cause

the

rear

this

transceiver

get

warm.

not

place

the

transceiver

where

the

heat

sink

(rear

panel)

might

come

contact

with

plastic

vinyl

surfaces.

This

Instruction

Manual

covers

the

following

models.

TM-621A

144/220

MHz

DUAL

BANDER

TM-721A

144/440

MHz

DUAL

BANDER

(U.S.A.

version)

_TM-721A

144/430

MHz

DUAL

BANDER

(Other

market)

TM-721E

144/43Q

MHz

DUAL

BANDER

(with

Tone

Burst

for

U.K.

version)

The

following

explicit

definitions

apply

this

manual:

Note

disregarded,

inconvenience

only,

risk

equipment

damage

personal

injury.

Caution

Equipment

damage

may

occur,

but

not

per-

sonal

injury.

Illustrations

show

the

TM-721A.

CONTENTS

Pes

BEFORE

OPERATION

...............202000csssceceeeees

SPECIFICATIONS

and

ACCESSORIES

............

INSTALLATION

INSTRUCTIONS

...................

OPERATION

joss

csicccccecocveccsocnvetsvecseecsevsesseess

OPERATING

CONTROLS

RECEIVER

OPERATION.

.......sccccecceccessecscccees

Reception

Frequency

Selection

.......ccssessececeeeceeseneees

Frequency

Step

Selection........scesesescereseees

A.B.C.

(Automatic

Band

Change)

...........000.

Beep

Tone

TRANSMITTER

OPERATION

.......sccceessssceeenes

REPEATER

OPERATION..........

snedeveelectenessnie

Transmitter

Offsets

Reverse

Function

Tone

Operation

Autopatch

(U.S.A.

version

only)......sss+seeeees

MEMORY

isaac

ccncsseccossnstceacciacnccssdesscsdsreceses

Microprocessor

Memory

Back-up

Microprocessor

Initialization

Memory

Channel

Memory

Contents

Memory

Entry

.....cscccsccsccccecccssssrscecesssas

Simplex/Normal

SHIFT

Odd

Split

Channel

Call

Channnel......cccccssscssscessccesccessesens

Memory

Recall

Memory

Shift

Scan

Options

Programmable

Band

Scan/Band

Scan

Memory

Channel

Scan

Hold

Resume

Programming

Priority

Alert

.....ccccesceccscceccssesenccsvecensuaes

Memory

Channel

Lockout

BLOCK

DIAGRAM

and

SCHEMATIC

DIAGRAM

"°°"

another

sheet

MAINTENANCE

............ccccccscesscccrsescncnsscnens

Case

Difficulty

.......ccccsccssscescsscacessaceers

OPTIONAL

ACCESSORIES.

............scecscsesenees

CTCSS

unit

TSU-6

(U.S.A.

version)

.....:.cssseees

REMOTE

CONTROLLER

RC-10.........sseeeecsseees

REFERENCE

..........00ceeccscccsecestsasecenrsscceeeees

BEFORE

OPERATION

Safety

precautions

Never

remove

the

case

unless

instructed

this

In-

struction

Manual.

the

internal

parts

are

touched

acciden-

tally,

serious

electric

shock

might

occur.

Never

touch

internal

parts.

metal

object,

such

hair

needle,

comes

into

contact

with

the

power

socket

the

rear

panel,

dangerous

electric

shock

may

result.

Never

permit

children

put

anything,

especially

metal

objects,

inside

this

unit.

The

power

requirement

13.8

VDC.

Never

attempt

connection

VDC

source.

Power

Supply:

Touching

the

power

plug

when

your

hands

are

wet

may

result

serious

electric

shock.

6°

Never

touch

with

wet

hands.

[DQ

Power

Supply:

Never

pull,

bend

extend

the

power

cord.

This

could

damage

the

power

cord,

resulting

broken

cord

short-

circuit.

Always

grasp

the

plug.

Installation

notes

not

place

this

unit

location

that

exposed

direct

sunlight,

near

heating

appliance,

etc.

cao

not

store

use

the

unit

dusty

location

moist

atmosphere.

Select

location

where

there

good

ventila-

tion.

case

abnormal

odor

abnormal

odor

smoke

detected,

immediately

turn

the

power

OFF

and

pull

out

the

power

cord.

Contact

your

dealer

nearest

Service

Station.

oye

(gen

maintain

good

ventilation,

not

put

books

papers

the

unit.

Position

the

unit

least

away

from

the

walls.

Cleaning

not

use

volatile

solvents

such

alcohol,

paint

thinner,

gasoline,

benzine,

etc.

clean

the

cabinet.

Use

silicone

cloth

clean

dry

cloth.

Silicone

cloth

Thinner

Benzine

SPECIFICATIONS

AND

ACCESSORIES

2-1.

SPECIFICATIONS

Specifications

wa]

T™721E

TMs21A

Other

markets

U.S.A.

version

Other

mark

Frequency

range

144

148

MHz|144

148

MHz|

144

148

MHz|144

148

MHz|

1438

460

MHz|430

440

MHz|430

440

MHz|220

225

MHa

FSE

(FM)

20°C

140°F)

150x

60x

219

(6.9"

x2"

x8.6")

ria

1.8

(3.97

ibs)

144

Miz:

220

MHz:

Reactance

modulation

Less

than

£5

kHz

frequency

Audio

distortion

(at

60%

modulation)

Less

than

(300

3000

He)

‘Microphone

impedance

Circuitry

U.S.A.

version

Intermediate

144

MHz:

16.9

MHz/465

kHz,

220

MHz:

30.825

MHz/458

kHz,

440

MHz:

21.6

MHz/455

kHz

frequency

Other

market

144

MHz

430

MHz:

Ser

;ty(12

SINAD)

144

Wiz:

Loge

than

0.2

‘MHz:

Less

than

0.18

aV,

30/440

NAH:

220

Lass than

0.16

Solectivity

ohms

foad

(5%

distortioni

Notes:

ohms

Circuit

and

ratings

are

subject

change

without

notice

due

ad-

vancement

technology.

Recommended

minute

duty

cycle:

Transmission,

minutes

Reception

2-2.

ACCESSORIES

Unpack

your

new

transceiver

carefully,

and

con-

firm

that

the

accessories

listed

below

are

included

the

box.

MC-48B

DTMF

Microphone

(U.S.A.

only)...

.-T91-0359-15

.....

ea.

Dynamic

Microphone......

791-0365-15

.....1

ea,

Microphone

Hook

(U.S.A,

only)...

eee

-.J20-0319-24,.....1

ea.

Self

tapping

Screw

(U.S.A.

only)

-N46-3010-46.....2

ea.

Mobile

Mounting

Kit

.......N99-0318-05

Bracket......

seatereeseesesS29-0418-03,

SEMS

Screw

-NO9-1530-05

Self

tapping

Screw.

.....NO9-0335-05

Flat

Washer...

Power

Cable

-E30-2111-05

Fuse

(10A)....

-FO5-1031-05..

Instruction

Manual

-B50-8225-XX

Warranty

Card

After

unpacking

Shipping

container:

Save

the

boxes

and

packing

the

event

your

unit

needs

transported

for

remote

operation,

main-

tenance,

service.

INSTALLATION

INSTRUCTIONS

3-1.

INSTALLATION

Mounting

Bracket

When

installing

the

transceiver

vehicle

consider

the

ease

operation

and

safety

when

selecting

the

location

for

the

mounting

bracket.

Install

the

bracket

using

the

supplied

flat

washers

and

self

tapping

screws

washer

——~

Self

tapping

—

pcs.

each).

ccroin

Attach

the

transceiver

loosely

using

the

SEMS

screws

pcs.).

The

angle

the

bracket

may

adjusted

any

possible

viewing

angles.

Select

the

desired

angle.

Fig.

(Fig.

Hold

the

transceiver

place

and

tighten

the

SEMS

screws

using

wrench

screwdriver.

3-2.

CONNECTIONS

3-2-1.

Mobile

Installations

TM-721A/721E:

The

MA-4000

dual

band

antenna

recommended.

144

MHz

antenna

External

Speaker

Tre

SP-40

the

SP-50B

bln

Duplexer

220

MHz

430/440

MHz

TM-621A:

TM-721A/721E:

antenna

144

MHz

430

MHz

Cautions:

——

—

______

—

Before

installing

the

power

cable,

sure

remove

the

negative

lead

from

the

battery

for

safety.

After

installation

and

wiring,

sure

double

check

for

correct

installation

before

reconnecting

the

negative

lead

the

battery

terminal.

the

fuse

opens,

sure

check

that

each

conductor

has

not

been

damaged

short-circuiting,

etc.

Then

replace

with

new

fuse

the

same

rating.

After

completing

the

wiring,

wrap

the

fuse

holder

with

heat

resistant

tape

protect

against

heat

and

moisture.

not

remove

the

fuse

even

the

power

cable

too

long.

Battery

Connections

Connect

the

power

cable

directly

the

battery

terminals.

Use

the

cigarette

lighter

socket

can

lead

poor

connec-

tion,

and

result

poor

performance.

Pay

attention

the

polarity

the

cables

when

connecting

them

the

bat-

tery.

Make

sure

the

positive

(+)

and

negative

(—)

lead

polarity

correct

when

connecting

the

battery.

Engine

compartment

«—-1—-

Passenger

compartment

Red

Fuse

the

transceiver

Chassis

fire

wall

the

wiring

hole

the

fire

wall

chassis

too

small,

disassemble

the

fuse

holder

thread

the

wire

through

the

hole.

Set

Thread

this

compartment

Ignition

Noise

This

transceiver

has

been

designed

suppress

ignition

noise;

however,

excessive

noise

present,

may

necessary

use

suppressor

spark

plugs

(with

resistors).

3-2-2.

Fixed

Station

regulated

power

supply

(13.8

VDC

capable

sup-

plying

least

Amperes)

required.

The

PS-430

and

the

PS-50

are

recommended.

CAUTION:

Never

connect

the

power

cable

the

outlet

until

all

other

connections

have

been

made.

Before

connecting

and

disconnecting

the

power

connec-

tor,

sure

turn

off

the

POWER

switches

both

the

transceiver

and

the

power

supply.

Observe

polarity

the

power

cable.

The

transceiver

operates

13.8

VDC,

negative

ground.

Battery

polari-

must

correct.

The

power

cable

color

coded:

Red

—

(Positive

polarity)

Black

—

(Negative

polarity)

f°

144

MHz

antenna

PS-430

Fee

Leases

TM-621A

220

MHz

antenna

TM-721A/721E

430/440

MHz

antenna

3-2-3.

Antenna

The

type

antenna

that

used

will

greatly

affect

the

per-

formance

the

transceiver.

Use

properly

adjusted

anten-

na,

good

quality,

enable

your

transceiver

perform

its

best.

The

antenna

input

impedance

ohms.

Use

50-ohm

coaxial

cable

such

RG-8U

8D-2V

for

this

connection.

the

antenna

far

from

the

transceiver

the

use

low

loss

coaxial

cable,

such

RG-8U

recom-

mended.

Match

the

impedance

the

coaxial

cable

and

that

the

antenna

that

the

SWR

Jess

than

1.5

'to

The

protection

circuit

the

transceiver

will

activate

the

SWR

particularly

poor

(greater

than

1).

High

SWR

values

will

cause

the

transmitter

output

drop,

and

may:

lead

TVI

BCI

reports.

Caution:

ABABA

For

protection

against

fire,

electric

shock,

personal

injury,

damage

the

radio,

use

lightning

arrester

your

antenna

lines.

OPERATION

4-1.

OPERATING

CONTROLS

4-1-1.

Front

Panel

‘O)

Main

Tuning

control

This

control

used

select

the

desired

transmit/

receive

frequency,

Memory

Channel,

Frequency

Step,

Tone

Frequency,

and

Scan

direction

the

MAIN

fre-

quency

band.

CALL

key

(TM-621A/721A)

The

CALL

key

selects

the

CALL

channel

the

MAIN

frequency

band.

The

frequency

has

been

factory-set

follows,

but

may

reset

any

desired

frequency.

(See

CALL

Channel

P25.)

TM-621A

;

220.000/144.000

T™M-721A

U.S.A.

version

;

440.000/144.000

Other

market

430.000/144.000

TONE

key

(TM-721E)

European

version:

This

key

used

transmit

Tone

signal.

When

the

key

depressed

the

repeater

con-

trol

signal

1750

activated.

U.K.

version:

This

key

used

activate

the

1750

tone

burst.

axe

yy?

VFO

key

This

key

used

return

VFO

operation

after

oper-

ating

the

(Memory

Recall),

CALL

Channel

mode

(TM-621A/721A

only).

The

MAIN

tuning

control

will

increase

frequency

the

selected

step

size,

the

tone

frequency

(TM-621A/721A

only),

and/or

the

frequency

step.

MR/M

key

This

key

used

select

Memory

Recall

operation

af-

ter

operating

the

VFO

CALL

channel

mode.

The

MAIN

Tuning

control

may

used

select

the

desired

memory

channel

this

mode.

VOL

control/Power

switch

The

volume

control

and

power

switch

are

combined.

Rotating

the

control

clockwise

will

turn

the

tran-

sceiver.

Advancing

the

control

further

clockwise

will

increase

the

total

volume

two

bands.

The

BALANCE

control

proportions

the

volume

among

the

two

bands.

MAIN

SQL

control

This

control

used

select

the

desired

SOL

threshold

level

the

MAIN

frequency

band.

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