Kenwood TM-401A User manual

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KENWOOD

TM-401A

INSTRUCTION

MANUAL

Illustrated

is

the

USA

version.

You

are

the

owner

of

our

latest

product,

the

new

TM-401A

transceiver.

Please

read

this

instruction

manual

carefully

before

placing

your

transceiver

in

service.

The

unit

has

been

carefully

engineered

and

manufactured

to

rigid

quality

stan-

dards,

and

should

give

you

satisfactory

and

dependable

-~

operation

for

many

years.

CONTENTS:

1.

FEATURES.

talc

cinta

aaltitataios

Poswatiaeopaehasans

tetas

sary

3

2.

CONTROLS

AND

THEIR

FUNCTIONS

..........

4

3.

INSTALLATIONS

AND

CONNECTIONS

...........00002..

uv

2

A

I

RERAT

OIM

16,

axences

cums

esha

aie

deobenicterstiw

inlsholint

13

5.

MAINTENANCE

AND

ADJUSTMENT.............000.005

vw

VB

6.

ABISESSORIES

.

snus

suc

sinse-tcesnndsve

sense

eneememetber

wean

VO

7.

BLOCK

DIAGRAM

.......

nsiecinay

ciara

joe

gee

ae

a

22,23

8.

SPECIFICATIONS........

Sra

Shinto

tea

Bins

23,24

@

ACCESSORIES

®

For

versions

other

than

USA.

~

KENWOOD

For

USA

version.

Carefully

unpack

your

TM-401A

and

check

that

it

is

supplied

with

the

following

accessories:

@

Microphone

a

Dynamic

microphone

..................0..0cc0ccceeeeeees

(

b

Electret

condenser

microphone

with

touch-tone...(

@

Communications

speaker

(with

2.5

mlead)

.........

(

@)

Speaker

mounting

kit

Brack6tceauncususengn

Cushion

(A)

Tapping

screw

($4

x

8)

Flat

head

tapping

screw

($4

x

8)

Round

head

screw

(@4

x

10)

....

Hex.

head

nut

(4)

Mobile

mounting

kit

Mounting

bracket.......

Boss

Flat

washer

for

boss

(3)

....

Flat

screw

for

boss

(@3

x

14)

Round

head

screw

(@6

x

20)

Flat

washer

(@6)

Spring

washer

($6)

Flange

nut

($6)

Tapping

screw

($5

x

12)

....

Flat

washer

($5)

(

Cushion

(B)

.5.snisssc.-s.

ie

seadprareanneprowesre

stall

Cushion

(C)

..

ee

rrre

ade

Stack

plates..............

(

Bind

screws...............

(

DC

power

cord

(Approx.

2

m)....

Spare

fuse

(5A)

ctr

acne

Seka

asad

(

NASTRU

STON

IARUSIS,

sssni

co

ccae

ren

vs

saiinie

asaencesnse

denn

(

ECOG

DES

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weighs

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aici

aitiirea

aieaibt

aieshee

artes

Seca’

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(

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Tabane

Sa

alsa

§

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(

(

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AG

T91-0331-05)....1

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T91-0332-05)....1

pc.

T19-0101-05)....1

pe.

J21-2799-13)....1

pe.

3-0680-04)

...1

pc.

N87-4008-41)

..4

pcs

N88-4008-41)

..2

pes

N30-4010-41)..2

pes

N10-2040-41)

..2

pes

A13-0640-12)

...1

pc.

J32-0775-04)

..4

pes.

N19-0631-05)

..4

pes.

N32-3014-41)

..4

pes.

NO9-0008-04)

..4

pcs.

N15-1060-46)

..4

pcs.

N16-0060-46)

..4

pes.

N14-0510-04)

..4

pes.

.

(NOS8-0632-05)

..4

pcs.

N15-1050-46)

..4

pes.

G13-0683-04)

...1

pc.

G13-0686-04)

..2

pcs

J21-2800-04)

..2

pes

N35-3006-45)

..4

pcs.

_.(E30-1689-15)....1

po)

FO5-5022-05)....1

pc.

B50-4060-00)

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Senaatft

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t

PRE

@

AFTER

UNPACKING

Shipping

container:

Save

the

boxes

and

packing

in

remote

operation,

maintenance,

or

service.

The

following

explicit

definitions

apply

in

this

manual:

Note:

personal

injury.

Caution:

he

event

your

unit

needs

to

be

transported

for

If

disregarded,

inconvenience

only,

no

risk

of

equipment

damage

ame

Equipment

damage

may

occur,

but

not

personal

injury.

1.

FEATURES

¢

Compact,

slim

transceiver

for

easy

mobility

-_-~

¢

Microcomputer

provides

multi-frequency

control

functions

©

Dual

function

keyboard

facilitates

memory

recall

(MR)

©

High

reliability

by

using

PC

boards

for

each

unit;

high

sensitivity

(12

dB

SINAD

0.2

»V)

front-end

using

GaAs

FETs

©

Quality

sound

for

transmission

and

reception

-.

HI/LOW

switch

controls

output

power

¢

Repeater

operation

NOORWN—

.

Coaxial

connector

with

cable

greatly

reduces

effective

depth

when

connec-

ting

an

antenna

cable.

.

External

speaker

system

allows

installation

in

any

place.

.

Remote

frequency

control

unit

(FC-10)

extends

your

operation

facility.

.

Five

channel

memories

plus

COM*

channel

can

be

recalled

at

will.

.

ALERT

function

monitors

memory

channel

1

(M1).

.

Memory

scan

operation

(MS)

from

memory

channels

1

through

5.

.

Programmable

scan

within

the

frequency

range

selectable.

.

1

MHz

step-up

function

(MHz).

.

VFO

A

in

25

kHz

steps;

VFO

B

in

25

kHz

steps.

.

Beeper

indicates

each

of

7

modes.

POWER/VOL

SQUELCH

.

External

communications

speaker,

77

mm

in

dia.,

supplied.

.

Maximum

3%

modulation

distortion

ensures

good

quality

transmit

signal.

.

COM*

system

facilitates

access

to

repeaters

with

the

TU-3*

unit

(option)

in-

stalled.

.

The

TU-3

2nd

tone

frequency

(one

of

37

frequencies

selectable)

intercon-

nected

with

the

TX

OFFSET

system

enables

access

to

a

repeater.

.

The

REV

switch

monitors

direct

signal.

*

European

and

British

versions

excluded.

2.

CONTROLS

AND

THEIR

FUNCTIONS

Note:

Illustrated

is

a

version

other

than

that

of

Europe/England.

8

eo

@o

ow

POWER/VOL

SQUELCH

0

@

FRONT

PANEL

@

Tuning

control

(VFO)

Used

to

set

frequency

for

transmission

and

reception.

One

step

(depending

upon

VFO

step)

per

one

click

shifts

up

and

down.

During

memory

recall

opera-

tion,

turning

this

control

restores

the

operation

to

VFO

with

the

frequency

displayed.

x

Note:

One

click

rotation

shifts

the

displayed

frequency

one

step

up

or

down.

However,

the

frequency

step

may

not

be

changed

due

to

microcom-

puter

transient.

@

POWER/VOL

Power

ON-OFF

switch

and

volume

control

are

combined.

Turning

the

control

fully

counterclockwise

will

turn

the

power

OFF.

Clockwise

rotation

will

in-

C)

creases

the

volume.

oF

©

SQUELCH

The

squelch

control

is

used

to

eliminate

noise

during

no-signal

time.

Normally,

this

control

is

adjusted

clockwise

until

the

noise

disappears.

For

scan

opera-

©

tion,

this

control

must

be

set

to

the

threshold

point.

@

Keyboard

a)

MR/M1

(memory

recall)

Used

to

recall

memory

channe!.

key

When

depressed,

memory

channel

1

is

recalled.

The

MR

indicator

lights

to

show

the

memory

recall

is

in

operation.

Cr

Ee

When

recalling

one

of

the

memories

in

M2~M5,

depress

the

MR/M1

key

=a

|

then

the

corresponding

key

of

M2

~

M5.

b)

MS/M2

(memory

scan)

Used

to

initiate

scan

for

memory

channels.

_

key

During

memory

recall

operation,

depressing

this

key

recalls

memory

CH2.

~

Cus

a

During

memory

scan,

depressing

this

key

recalls

the

next

memory

channels.

C4

~

-_~

-_

(©)

MHz/M3

(1

MHz

up)

key

M3

‘d)

M/M4

(memory

input)

key

Cm

4

‘e&)

AL/MBS

(alert)

key

re

v5

|

Eas]

f)

A/B

(VFO

AJB

selection,

scan

stop)

key

A/B

CI

©

MIC

connector

(8

pin)

@

COM

(common

channel)

key

For

users

other

than

Europe

and

England.

COM

E4

TONE

switch

(For

British

version)

TONE

When

depressed,

the

displayed

frequency

shifts

up

1

MHz.

During

memory

recall

operation,

depressing

this

key

recalls

memory

CH3.

Used

to

store

the

desired

frequency

in

memory

channel

(and

in

COM

channel:

European

and

British

versions

excluded).

For

memory

input,

refer

to

page

15.

During

memory

recall

operation,

depressing

this

key

recalls

memory

CH4.

In

memory

CH4,

transmit

and

receive

frequencies

are

stored

independently

for

odd

split

operation.

When

depressed,

the

ALERT

indicator

lights

to

show

alert

operation

is

in

pro-

gress.

Depressing

this

key

again

releases

this

operation.

For

more

details,

refer

to

page

17.

During

memory

recall

operation,

depressing

this

key

recalls

memory

CH5.

Memory

channel

5

is

used

for

odd

split

operation

as

for

memory

channel

4.

The

frequencies

(transmit

and

receive)

stored

in

CH5

designate

frequency

range

limits

for

programmable

scan

operation.

For

more

details,

refer

to

page

15.

As

shown

in

the

table,

this

key

provides

three

types

of

operation.

Mode

A/B

key

functions

VFO

Each

time

the

key

is

depressed,

VFO

A

and

B

are

selected

alternately.

MR

When

depressed,

VFO

before

memory

recalled

is

restored.

SCAN

When

depressed,

scan

is

released.

Microphone

audio

input.

Frequency

UP/DWN

control

and

PTT

lines

are

includ-

ed.

Pin

assignments

of

the

MIC

connector

are

shown

below.

@©+8V

(10

mA

Load)

@

STEven

Note:

Do

not

apply

voltage

to

omic

pins@,

@,

and

@.

®

GND

The

pin

should

not

be

shorted

nor

applied

any

FRONT

VIEW

voltage.

When

the

key

is

depressed,

the

common

channel

can

be

recalled

any

time.

This

channel

can

be

changed

to

your

desired

frequency.

For

common

channel

replacement,

refer

to

page

15.

To

release

common

channel

operation,

depress

this

key.

No

other

key

can

release

the

operation.

When

the

optional

TU-3

tone

unit

is

installed,

the

1st

tone

frequency

is

emitted

when

operating

the

COM

channel.

When

this

switch

is

pressed,

the

repeater

control

tone

burst

signal

(1,750

Hz)

is

emitted

for

about

0.5

seconds

at

the

beginning

of

each

transmission.

TONE

switch

(For

European

version)

When

this

switch

is

pressed,

the

repeater

control

tone

signal

(1,750

Hz)

cir-

TONE

cuit

is

activated

and

the

unit

is

set

in

the.transmit

mode.

@

HI/LOW

switch

@

Display

(h)

Frequency

display

Scan

indicator

VFO

B

indicator

MR

indicator

ALERT

indicator

ON

AIR

indicator

BUSY

indicator

S

&

RF

meter

Note:

Illustrated

is

a

version

other

than

that

of

Europe/England.

9

C6)

HI

setting:

This

setting

allows

the

transmitter

to

transmit

power

output

up

to

12

watts.

LOW

setting:

This

setting

allows

the

transmitter

to

transmit

power

output

approx.

1

watts.

id

e

MF

—

ALERT

ae

ON

AIR

a

UHF

FM

TRANSCEIVER

=,

=

>

a

“i

Um]

a

3

1

3

58

Y

Lieb

ea

bt

BUSY

—

LA

b

€

g

h

During

VFO

A

or

B,

frequency,

for

example,

435.025

(445.025

for

USA)

is

displayed

in

four

digits

as

‘’

5.025

"’.

During

MR

(M1

—Mb5)

operation,

frequency,

for

example,

435.250

(445.250

for

USA)

is

displayed

in

four

digits

as

‘5.250’.

During

COM*

operation,

frequency

is

displayed

in

four

digits.

At

this

time,

zero

at

the

last

digit

is

half

size.

*

European

and

British

versions

excluded

During

scan

operation,

this

dot

flashes.

In

operation

other

than

scan,

this

dot

lights

to

show

MHz.

Lights

when

VFO

B

is

in

operation

Lights

during

memory

recall

operation

(M1

—

M65,

MS).

Lights

during

alert

operation.

Lights

when

transmitting.

Lights

during

reception

with

squelch

opened.

This

can

be

used

to

see

if

the

channel

is

busy

or

not.

«~

Indicates

the

incoming

signal

strength

by

LEDs

during

reception.

During

transmission,

LEDs

light

to

show

the

RF

output

level

strength.

With

the

HI/LOW

switch

HI,

all

LEDs

light.

With

the

HI/LOW

switch

LOW,

two

to

four

LEDs

light.

©

REV

switch

REV

O

@

TX

OFFSET

switch

TX

OFFSET

+

-

Area

—1.6

MHz

}—7.6

MHz

Europe

(D-A)

(D-B)

England

|

+1.6

MHz|—1.6

MHz

Used

to

reverse

the

repeater

shift

to

monitor

a

signal

coming

to

a

repeater.

Set-

ting

this

switch

to

ON

in

simplex

operation

locks

the

displayed

frequency

regardless

of

VFO,

keyboard,

and

COM*.CH

operations.

(*

European

and

British

versions

excluded.)

Used

to

set

transmit

frequency

shifted

from

the

displayed

receive

frequency

when

transmitting.

For

operation

other

than

that

of

a

repeater,

place

this

switch

to

the

'’S’’

posi-

tion.

This

equalizes

the

transmit

frequency

with

the

receive

frequency.

*(""+""

setting

shifts

+5

MHz;

‘’—‘’

setting

shifts

—5

MHz

from

the

receive

frequency

when

transmitting.)-For

European

and

British

versions,

refer

to

the

table

at

the

left.

This

operation

is

only

effective

in

VFO

and

MR

(M1~M3)

operations.

If

a

shift

frequency

goes

beyond

the

operating

frequency

range

when

depress-

ing

the

PTT

switch

to

transmit,

a

beep

will

sound

three

times

to

indicate

the

misoperation.

However,

transmit

frequency

is

emitted

in

simplex

mode.

*With

the

optional

TU-3

tone

unit

installed,

either

‘‘+’'

or

‘'—"’

setting

of

the

TX

OFFSET

switch

interconnects

the

TU-3

2nd

tone

frequency

setting.

(*

European

and

British

versions

excluded.)

@

REAR

PANEL

@

ANT

connector

lead

@

DC

Power

Terminal

®

SP

Terminal

@

RIGHT

SIDE

PANEL

Connect

a

50-ohm

antenna

to

this

terminal.

DC

power

input

terminal.

Connect

the

supplied

power

cord

with

plug.

Input

voltage

is

13.8

V

DC.

Observe

plus

(+)

and

minus

(—)

polarity!

Connect

the

supplied

8

ohm

speaker

to

this

jack.

®

Remote

jack

Used

to

connect

the

optional

FC-10

unit,

controlling

the

operation

frequency.

7

i

MICROPHONE

(For

U.S.A.

version)

@®

UP/DWN

switches

@®

PTT

Switch

@

16

Touch-Tone

Keys

(Auto-

patch

operation)

H@

MICROPHONE

(For

versions

other

than

U.S.A.)

@®

UP/DWN

switches

@®

PTT

switch

1)

2)

3)

Mic-hook

button

~

KENWOOD

Microphone

Touch-tone

encoder

Depressing

the

UP

or

DWN

key

momentarily

shifts

the

displayed

frequency

one

step

up

or

down.

Holding

the

key

depressed

continuously

shifts

the

frequency

up

or

down.

Holding

the

UP

or

DWN

key

depressed

for

about

one

second

initiates

scan

operation.

The

scan

direction

depends

on the

UP

or

DWN

key

operated.

Depressing

the

UP

or

DWN

key

during

MR

operation

will

change

the

opera-

tion

from

MR

to

VFO.

Press-to-talk

switch

is

used

for

transmission.

This

will

also

releases

scan

opera-

tion.

When

releasing

the

SCAN

operation,

transmission

is

inhibited.

Used

to

activate

the

touch-tone

encoder.

1)

2)

3)

Depressing

the

UP

or

DWN

key

momentarily

shifts

the

displayed

frequency

one

step

up

or

down.

Holding

the

key

depressed

continuously

shifts

the

frequency

up

or

down.

Holding

the

UP

or

DWN

key

depressed

for

about

one

second

initiates

scan

operation.

The

scan

direction

depends

on

the

UP

or

DWN

key

operated.

Depressing

the

UP

or

DWN

key

during

MR

operation

will

change

the

opera-

tion

from

MR

to

VFO.

Press-to-talk

switch

used

for

transmission.

This

will

also

release

scan

opera-

tion.

When

releasing

the

scan

operation,

transmission

is

inhibited.

3.

INSTALLATIONS

AND

CONNECTIONS

B@

ANTENNA

The

performance

of

the

transceiver

depends

upon

the

type

of

antenna

to

be

us-

ed.

To

ensure

the

maximum

performance

of

the

TM-401A,

select

a

suitable

™m~

antenna

and

adjust

it

for

low

VSWR.

@

MOBILE

INSTALLATION

®

Interconnection

The

TM-401A

is

equipped

with

a

speaker.

DOT

Sill

>)

|

||

To 70

cm

band

antenna

>

Black

©

Installation

location

Using

the

supplied

mounting

bracket,

install

the

transceiver

under

the

dashboard

or

on

the

side

of

the

console

in

your

car

as

shown.

If

your

car

is

equipped

with

an

electronic

fuel

injector,

the

transceiver

should

be

as

far

from

the

control

equipment

as

possible.

Under

driver's

seat

!

I

;

\

Side

of

—-t

|

Console

console

1

i

7

|

eee

Under

side

of

The

transceiver

should

be

dashboard

located

from

your

knees.

H

COMMUNICATIONS

SPEAKER

INSTALLATION

Note:

To

keep

driving

safe,

do

not

install

the

speaker

to

the

ceiling.

Example

2-2

Nut

(to

$4)

rat

a

Mounting

Mounting

surface

surface

Tapping

screw

oo

fe)

©

o|

Round

head

(¢4x

8)

screw

(¢4x

10)

Tapping

screw

(¢4

x

8)

Cushion

(A)

i

Example

Bw

LLL

Bracket

®

Installation

procedure

1)

Secure

the

bosses

on

each

side

with

4

flat

head

screws.

(Fig.

a)

2)

Affix

the

cushion

(c)

on

each

side

of

the

mounting

bracket.

(Fig.

b)

3)

Secure

the

mounting

bracket

to

a

car

chassis

as

shown

in

Fig.

c.

When

installing

the

bracket,

be

sure

the

front

part

of

the

bracket

faces

you.

4)

Insert

the

transceiver

as

shown

in

Fig.

d

so

the

bosses

on

the

transceiver

slide

into

the

grooves

of

the

mounting

bracket.

5)

To

stack

with

the

TM-201A

(2

m),

first

secure

the

supplied

stack

plate

to

the

TM-401A

with

bosses

then

stack

the

TM-201A,

second

insert

the

stacked

transceivers

as

shown

in

Fig.d

so

the

bosses

on

the

upper

transceiver

slide

into

the

grooves

of

the

mounting

bracket.

Flat

head

Boss

Flat

screw

washer

Be

sure

to

use

flat

washers.

Otherwise,

in-

stallation

to

the

mounting

bracket

is

not

done

well.

However,

when

stack

installation

with

the

TM-201A

is

attempted,

do

not

use

these

washers

since

the

stack

plates

are

used.

Fig.

c

Mounting

bracket

installation

Mountin,

:

surface

i

Piange

nut

Mounting

surface

\

ae

\_

Bi

\)

Flat

washer

\\

Spring

washer

*

Hex.

head

bolt

To

install

the

bracket

on

a

bent

mounting

surface,

bend

these

parts

as

shown.

10

\\

Flat

washer

Tapping

screw

Mounting

bracket

Mounting

surface

Rear

part

of

the

Fig.

b

Cushion

attachment

Affix

the

cushion

(C)

on

each

side.

Fig.

d

Transceiver

installation

Transceiver

installation

Ensure

the

front/rear

of

the

bracket

when

mounting.

Fess

Flat

screw

Stacking

plate

Affix

the

cushion

(B).

TM-201A

TM-401A