Kenwood TM-401A User manual

KENWOOD

TM-401A

INSTRUCTION

MANUAL

Illustrated

the

USA

version.

You

are

the

owner

our

latest

product,

the

new

TM-401A

transceiver.

Please

read

this

instruction

manual

carefully

before

placing

your

transceiver

service.

The

unit

has

been

carefully

engineered

and

manufactured

rigid

quality

stan-

dards,

and

should

give

you

satisfactory

and

dependable

operation

for

many

years.

CONTENTS:

FEATURES.

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CONTROLS

AND

THEIR

FUNCTIONS

..........

INSTALLATIONS

AND

CONNECTIONS

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

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deobenicterstiw

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MAINTENANCE

AND

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

ABISESSORIES

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sense

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BLOCK

DIAGRAM

.......

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22,23

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

supplied

with

the

following

accessories:

Microphone

Dynamic

microphone

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

(

Electret

condenser

microphone

with

touch-tone...(

Communications

speaker

(with

2.5

mlead)

.........

(

Speaker

mounting

kit

Brack6tceauncususengn

Cushion

(A)

Tapping

screw

($4

Flat

head

tapping

screw

($4

Round

head

screw

(@4

10)

....

Hex.

head

nut

(4)

Mobile

mounting

kit

Mounting

bracket.......

Boss

Flat

washer

for

boss

(3)

....

Flat

screw

for

boss

(@3

14)

Round

head

screw

(@6

20)

Flat

washer

(@6)

Spring

washer

($6)

Flange

nut

($6)

Tapping

screw

($5

12)

....

Flat

washer

($5)

(

Cushion

(B)

.5.snisssc.-s.

seadprareanneprowesre

stall

Cushion

(C)

rrre

ade

Stack

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

(

Bind

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

(

power

cord

(Approx.

m)....

Spare

fuse

(5A)

ctr

acne

Seka

asad

(

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STON

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N88-4008-41)

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N19-0631-05)

..4

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..4

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pcs

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Senaatft

PRE

AFTER

UNPACKING

Shipping

container:

Save

the

boxes

and

packing

remote

operation,

maintenance,

service.

The

following

explicit

definitions

apply

this

manual:

Note:

personal

injury.

Caution:

event

your

unit

needs

transported

for

disregarded,

inconvenience

only,

risk

equipment

damage

ame

Equipment

damage

may

occur,

but

not

personal

injury.

FEATURES

Compact,

slim

transceiver

for

easy

mobility

-_-~

Microcomputer

provides

multi-frequency

control

functions

Dual

function

keyboard

facilitates

memory

recall

(MR)

High

reliability

using

boards

for

each

unit;

high

sensitivity

(12

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

antenna

cable.

External

speaker

system

allows

installation

any

place.

Remote

frequency

control

unit

(FC-10)

extends

your

operation

facility.

Five

channel

memories

plus

COM*

channel

can

recalled

will.

ALERT

function

monitors

memory

channel

(M1).

Memory

scan

operation

(MS)

from

memory

channels

through

Programmable

scan

within

the

frequency

range

selectable.

MHz

step-up

function

(MHz).

VFO

kHz

steps;

VFO

kHz

steps.

Beeper

indicates

each

modes.

POWER/VOL

SQUELCH

External

communications

speaker,

dia.,

supplied.

Maximum

modulation

distortion

ensures

good

quality

transmit

signal.

COM*

system

facilitates

access

repeaters

with

the

TU-3*

unit

(option)

in-

stalled.

The

TU-3

2nd

tone

frequency

(one

frequencies

selectable)

intercon-

nected

with

the

OFFSET

system

enables

access

repeater.

The

REV

switch

monitors

direct

signal.

European

and

British

versions

excluded.

CONTROLS

AND

THEIR

FUNCTIONS

Note:

Illustrated

version

other

than

that

Europe/England.

POWER/VOL

SQUELCH

FRONT

PANEL

Tuning

control

(VFO)

Used

set

frequency

for

transmission

and

reception.

One

step

(depending

upon

VFO

step)

per

one

click

shifts

and

down.

During

memory

recall

opera-

tion,

turning

this

control

restores

the

operation

VFO

with

the

frequency

displayed.

Note:

One

click

rotation

shifts

the

displayed

frequency

one

step

down.

However,

the

frequency

step

may

not

changed

due

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-

creases

the

volume.

SQUELCH

The

squelch

control

used

eliminate

noise

during

no-signal

time.

Normally,

this

control

adjusted

clockwise

until

the

noise

disappears.

For

scan

opera-

tion,

this

control

must

set

the

threshold

point.

Keyboard

MR/M1

(memory

recall)

Used

recall

memory

channe!.

key

When

depressed,

memory

channel

recalled.

The

indicator

lights

show

the

memory

recall

operation.

When

recalling

one

the

memories

M2~M5,

depress

the

MR/M1

key

then

the

corresponding

key

M5.

MS/M2

(memory

scan)

Used

initiate

scan

for

memory

channels.

key

During

memory

recall

operation,

depressing

this

key

recalls

memory

CH2.

Cus

During

memory

scan,

depressing

this

key

recalls

the

memory

channels.

-_~

(©)

MHz/M3

MHz

up)

key

‘d)

M/M4

(memory

input)

key

‘e&)

AL/MBS

(alert)

key

Eas]

A/B

(VFO

AJB

selection,

scan

stop)

key

A/B

MIC

connector

pin)

COM

(common

channel)

key

For

users

other

than

Europe

and

England.

COM

TONE

switch

(For

British

version)

TONE

When

depressed,

the

displayed

frequency

shifts

MHz.

During

memory

recall

operation,

depressing

this

key

recalls

memory

CH3.

Used

store

the

desired

frequency

memory

channel

(and

COM

channel:

European

and

British

versions

excluded).

For

memory

input,

refer

page

15.

During

memory

recall

operation,

depressing

this

key

recalls

memory

CH4.

memory

CH4,

transmit

and

receive

frequencies

are

stored

independently

for

odd

split

operation.

When

depressed,

the

ALERT

indicator

lights

show

alert

operation

pro-

gress.

Depressing

this

key

again

releases

this

operation.

For

details,

refer

page

17.

During

memory

recall

operation,

depressing

this

key

recalls

memory

CH5.

Memory

channel

used

for

odd

split

operation

for

memory

channel

The

frequencies

(transmit

and

receive)

stored

CH5

designate

frequency

range

limits

for

programmable

scan

operation.

For

details,

refer

page

15.

shown

the

table,

this

key

provides

three

types

operation.

Mode

A/B

key

functions

VFO

Each

time

the

key

depressed,

VFO

and

are

selected

alternately.

When

depressed,

VFO

before

memory

recalled

restored.

SCAN

When

depressed,

scan

released.

Microphone

audio

input.

Frequency

UP/DWN

control

and

PTT

lines

are

includ-

ed.

assignments

the

MIC

connector

are

shown

below.

@©+8V

(10

Load)

STEven

Note:

not

apply

voltage

omic

pins@,

and

GND

The

should

not

shorted

nor

applied

any

FRONT

VIEW

voltage.

When

the

key

depressed,

the

common

channel

can

recalled

any

time.

This

channel

can

changed

your

desired

frequency.

For

common

channel

replacement,

refer

page

15.

release

common

channel

operation,

depress

this

key.

other

key

can

release

the

operation.

When

the

optional

TU-3

tone

unit

installed,

the

1st

tone

frequency

emitted

when

operating

the

COM

channel.

When

this

switch

pressed,

the

repeater

control

tone

burst

signal

(1,750

Hz)

emitted

for

about

0.5

seconds

the

beginning

each

transmission.

TONE

switch

(For

European

version)

When

this

switch

pressed,

the

repeater

control

tone

signal

(1,750

Hz)

cir-

TONE

cuit

activated

and

the

unit

set

the.transmit

mode.

HI/LOW

switch

Display

(h)

Frequency

display

Scan

indicator

VFO

indicator

ALERT

indicator

AIR

indicator

BUSY

indicator

meter

Note:

Illustrated

version

other

than

that

Europe/England.

C6)

setting:

This

setting

allows

the

transmitter

transmit

power

output

watts.

LOW

setting:

This

setting

allows

the

transmitter

transmit

power

output

approx.

watts.

—

ALERT

AIR

UHF

TRANSCEIVER

“i

Um]

Lieb

BUSY

—

€

During

VFO

frequency,

for

example,

435.025

(445.025

for

USA)

displayed

four

digits

‘’

5.025

"’.

During

(M1

—Mb5)

operation,

frequency,

for

example,

435.250

(445.250

for

USA)

displayed

four

digits

‘5.250’.

During

COM*

operation,

frequency

displayed

four

digits.

this

time,

zero

the

last

digit

half

size.

European

and

British

versions

excluded

During

scan

operation,

this

dot

flashes.

operation

other

than

scan,

this

dot

lights

show

MHz.

Lights

when

VFO

operation

Lights

during

memory

recall

operation

(M1

—

M65,

MS).

Lights

during

alert

operation.

Lights

when

transmitting.

Lights

during

reception

with

squelch

opened.

This

can

used

see

the

channel

busy

not.

«~

Indicates

the

incoming

signal

strength

LEDs

during

reception.

During

transmission,

LEDs

light

show

the

output

level

strength.

With

the

HI/LOW

switch

HI,

all

LEDs

light.

With

the

HI/LOW

switch

LOW,

two

four

LEDs

light.

REV

switch

REV

OFFSET

switch

OFFSET

Area

—1.6

MHz

}—7.6

MHz

Europe

(D-A)

(D-B)

England

+1.6

MHz|—1.6

MHz

Used

reverse

the

repeater

shift

monitor

signal

coming

repeater.

Set-

ting

this

switch

simplex

operation

locks

the

displayed

frequency

regardless

VFO,

keyboard,

and

COM*.CH

operations.

European

and

British

versions

excluded.)

Used

set

transmit

frequency

shifted

from

the

displayed

receive

frequency

when

transmitting.

For

operation

other

than

that

repeater,

place

this

switch

the

'’S’’

posi-

tion.

This

equalizes

the

transmit

frequency

with

the

receive

frequency.

*(""+""

setting

shifts

MHz;

‘’—‘’

setting

shifts

—5

MHz

from

the

receive

frequency

when

transmitting.)-For

European

and

British

versions,

refer

the

table

the

left.

This

operation

only

effective

VFO

and

(M1~M3)

operations.

shift

frequency

goes

beyond

the

operating

frequency

range

when

depress-

ing

the

PTT

switch

transmit,

beep

will

sound

three

times

indicate

the

misoperation.

However,

transmit

frequency

emitted

simplex

mode.

*With

the

optional

TU-3

tone

unit

installed,

either

‘‘+’'

‘'—"’

setting

the

OFFSET

switch

interconnects

the

TU-3

2nd

tone

frequency

setting.

European

and

British

versions

excluded.)

REAR

PANEL

ANT

connector

lead

Power

Terminal

RIGHT

SIDE

PANEL

Connect

50-ohm

antenna

this

terminal.

power

input

terminal.

Connect

the

supplied

power

cord

with

plug.

Input

voltage

13.8

DC.

Observe

plus

(+)

and

minus

(—)

polarity!

Connect

the

supplied

ohm

speaker

this

jack.

Remote

jack

Used

connect

the

optional

FC-10

unit,

controlling

the

operation

frequency.

MICROPHONE

(For

U.S.A.

version)

@®

UP/DWN

switches

@®

PTT

Switch

Touch-Tone

Keys

(Auto-

patch

operation)

MICROPHONE

(For

versions

other

than

U.S.A.)

@®

UP/DWN

switches

@®

PTT

switch

Mic-hook

button

KENWOOD

Microphone

Touch-tone

encoder

Depressing

the

DWN

key

momentarily

shifts

the

displayed

frequency

one

step

down.

Holding

the

key

depressed

continuously

shifts

the

frequency

down.

Holding

the

DWN

key

depressed

for

about

one

second

initiates

scan

operation.

The

scan

direction

depends

on the

DWN

key

operated.

Depressing

the

DWN

key

during

operation

will

change

the

opera-

tion

from

VFO.

Press-to-talk

switch

used

for

transmission.

This

will

also

releases

scan

opera-

tion.

When

releasing

the

SCAN

operation,

transmission

inhibited.

Used

activate

the

touch-tone

encoder.

Depressing

the

DWN

key

momentarily

shifts

the

displayed

frequency

one

step

down.

Holding

the

key

depressed

continuously

shifts

the

frequency

down.

Holding

the

DWN

key

depressed

for

about

one

second

initiates

scan

operation.

The

scan

direction

depends

the

DWN

key

operated.

Depressing

the

DWN

key

during

operation

will

change

the

opera-

tion

from

VFO.

Press-to-talk

switch

used

for

transmission.

This

will

also

release

scan

opera-

tion.

When

releasing

the

scan

operation,

transmission

inhibited.

INSTALLATIONS

AND

CONNECTIONS

ANTENNA

The

performance

the

transceiver

depends

upon

the

type

antenna

us-

ed.

ensure

the

maximum

performance

the

TM-401A,

select

suitable

™m~

antenna

and

adjust

for

low

VSWR.

MOBILE

INSTALLATION

Interconnection

The

TM-401A

equipped

with

speaker.

DOT

Sill

To 70

band

antenna

Black

Installation

location

Using

the

supplied

mounting

bracket,

install

the

transceiver

under

the

dashboard

the

side

the

console

your

car

shown.

your

car

equipped

with

electronic

fuel

injector,

the

transceiver

should

far

from

the

control

equipment

possible.

Under

driver's

seat

;

Side

—-t

Console

console

eee

Under

side

The

transceiver

should

dashboard

located

from

your

knees.

COMMUNICATIONS

SPEAKER

INSTALLATION

Note:

keep

driving

safe,

not

install

the

speaker

the

ceiling.

Example

2-2

Nut

(to

$4)

rat

Mounting

surface

Tapping

screw

fe)

Round

head

(¢4x

screw

(¢4x

10)

Tapping

screw

(¢4

Cushion

(A)

Example

LLL

Bracket

Installation

procedure

Secure

the

bosses

each

side

with

flat

head

screws.

(Fig.

Affix

the

cushion

(c)

each

side

the

mounting

bracket.

(Fig.

Secure

the

mounting

bracket

car

chassis

shown

Fig.

When

installing

the

bracket,

sure

the

front

part

the

bracket

faces

you.

Insert

the

transceiver

shown

Fig.

the

bosses

the

transceiver

slide

into

the

grooves

the

mounting

bracket.

stack

with

the

TM-201A

m),

first

secure

the

supplied

stack

plate

the

TM-401A

with

bosses

then

stack

the

TM-201A,

second

insert

the

stacked

transceivers

shown

Fig.d

the

bosses

the

upper

transceiver

slide

into

the

grooves

the

mounting

bracket.

Flat

head

Boss

Flat

screw

washer

sure

use

flat

washers.

Otherwise,

in-

stallation

the

mounting

bracket

not

done

well.

However,

when

stack

installation

with

the

TM-201A

attempted,

not

use

these

washers

since

the

stack

plates

are

used.

Fig.

Mounting

bracket

installation

Mountin,

surface

Piange

nut

Mounting

surface

Flat

washer

Spring

washer

Hex.

head

bolt

install

the

bracket

bent

mounting

surface,

bend

these

parts

shown.

Flat

washer

Tapping

screw

Mounting

bracket

Mounting

surface

Rear

part

the

Fig.

Cushion

attachment

Affix

the

cushion

(C)

each

side.

Fig.

Transceiver

installation

Transceiver

installation

Ensure

the

front/rear

the

bracket

when

mounting.

Fess

Flat

screw

Stacking

plate

Affix

the

cushion

(B).

TM-201A

TM-401A

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