Kenwood TK-762-H, TK-762, TK-760-H, TK-760 Service Manual

VHF

FM

TRANSCEIVER

TK-760/762/H

SERVICE MANUAL

KENWOOD

B51-8327-00 (N) 1382

IN

JAPAN

TK-760JH

Cabinet (AOl-2112-03)

(

(Upper)

TK-762/H

Panel (A62-0449-13)

-..."..;m:-

assy

Panel assy (A62-0450-13)

Front

glass

(810-1230-04)

"-~-~

Front

glass

(810-1252-04)

Key

top

(K29-5081-02)

(Rubber)

Key

top

(K29-5081-02)

(Rubber)

TK-760/762/H

CONTENTS

GENERAL 3 SYSTEM SET-UP OPERATING FEATURES

1.

Transceiver

INSTALLATION

1.

Accessory

2.

Ignition

3.

PA/HA

4.

DTMF

5.

External

6.

Fitting

REALIGNMENT

Modes

1.

2.

HowToEnter

3. Panel

4.

Panel BLOCK LEVEL DIAGRAM : 19 CIRCUIT DESCRIPTION

SEMICONDUCTOR DATA DESCRIPTIONOFCOMPONENTS PARTS LIST 34 EXPLODED VIEW PACKING ADJUSTMENT TERMINAL FUNCTION

PC

KAP-1 SPECIFICATIONS BACK

DIAGRAM

Circuit

1.

2.

Receiving

3.

Transmitter

4.

Frequency

5.

Display

6.

Control

BOARD VIEWS I CIRCUIT DIAGRAMS

VCO (X58-4360-XX) TX-RX TX-RX

UNIT: UNIT:

(PA/HA

Programming

Connection

Sense Cable (KCT-18 :

Unit

(KAP-1 :

Decode

Speaker 12

the

Control

Each

Test

Mode

Tuning

ConfigurationbyFrequency 20

Mode

System

Synthesizer

Section

TX-RX (X57-4950-XX) CONTROL (X57-4950-XX) (B/2) : TK-760 I (X57-5100-XX) (B/2) : TK-762

UNIT)

Cable (KCT-19 :

Option)

Panel

Upside

Mode

(TK-760 Only)

(TK-760 Only) 15

Unit

Down

(A/2):

Option)

:

TK-760 I (X57-5100-XX) (A/2) : TK-762

: 5

6

7

9 10 11

12

13 13 13

17

20 22 23 24 24 27 31

41 42 43 49

50 51 61 71

COVER

2

GENERAL

TK-760/762

INTRODUCTION

SCOPEOFTHIS

This manual is intended for use by experienced technicians familiar grade communications equipment. It contains quired service information for the equipment and currentasof the publication data. Changes which may occur after publication are covered Bulletins or Manual Revisions. These are issued quired.

MANUAL

with

similar types of commercial

by

either Service

all

as

re-

ORDERING REPLACEMENT PARTS

When ordering replacement parts or equipment information, the full part identification number should included. This applies to chassis. If the part number chassis or kit number of which it cient description

of

all

parts: components, kits, or

is

not known, include the

is

a part, and a suffi-

the required component for proper

identification.

FCC

COMPLIANCE

Model and Frequency TX

destination range (MHzl

TK-760 TK-760 TK-762 TK-762 TK-760H TK-760H TK-762H TK-762H

K K2 K K2 K K2 K K2

AND

148-174 136-156 148-174 136-156 148-174 136-156 148-174 136-156

be

TYPE NUMBERS

power

IW)

25 5/2.5 25 5/2.5 25 25 45 45 45 45

is

Deviation

PERSONNEL SAFETY

The following precautions are recommended for

personnel

•

DO meter) of the antenna.

•

DO secure and any open connectors are properly terminated.

• SHUT near electrical blasting caps orinan mosphere.

• All equipment should power-up for safe operation.

• This equipment should be serviced by a qualified technician only.

(kHz)

5/2.5 5/2.5 5/2.5 5/2.5 5/2.5 5/2.5

safety:

NOT transmit if someoneiswithin

NOT transmit until

OFF

and DO NOT operate this

Signaling

OT DOT

0 0

0 0 0 0 0 0

allRFconnectors are verified

be

properly grounded before

2·TONE

DTMFENC

DEC

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0

two

equipment

explosive at-

feet (0.6

PRE-INSTALLATION CONSIDERATIONS

1.

UNPACKING

Unpack the radio from its shipping container and check for accessory items. If any please contact KENWOOD immediately.

2.

L1CI;NSING REQUIREMENTS

Federal regulations require a station license for each

radio installation (mobile or base) equipment owner. The licensee suring transmitter power, frequency, within the limits permitted by the station license.

Transmitter adjustments may a licensed technician holding general class commercial radiotelephone operator's cense. Thereisno

license required to install or operate

the radio.

item

be

obtainedbythe

is

responsible for en-

and

deviation are

be

performed only by

an

FCC

first, second or

is missing,

3.

PRE-INSTALLATION CHECKOUT

3-1. Introduction

Each

radioisadjusted and tested before shipment. However, it mitter operation

is

recommended that receiver and trans-

be

checked for proper operation be-

fore installation.

3-2. Testing

The radio shouldbetested complete

and

accessoriesasthey will be connectedinthe final installation. power output should sensitivity,

li-

OT

equipment operation shouldbeverified.

Transmitter

be

squelch

operation,

frequency,

checked,asshould receiver

with

deviation, and

and audio

all

cabling

output.

3

TK-760/762

4.

PLANNING THE

4-1. General

Inspect the vehicle and determine

the radio antenna and accessories will

Plan

cable runs for protection against pinching or crushing wiring, and radio installation to prevent overheating.

INSTAllATION

how

be

mounted.

GENERAL

and where

5.

INSTALLATION PLANNING - CONTROL STATIONS

5-1. Antenna system

Control station. The antenna system selection depends manual. Your KENWOOD dealer an needs.

on

many factors

antenna system that will best serve your particular

andisbeyond the scope of this

can

help you select

4-2. Antenna

The favored location for of a large, flat conductive area, usually at the roof center. The trunk lid vehicle chassis using ground straps to ensure the lid at chassis ground.

4-3. Radio

The universal mount bracket allows the radio to mountedina variety of ways.

is

surface low Position the radio close enough to the vehicle operator to permit easy access to the controls when driving.

4-4. DC Power and wiring

1.

This radio maybeinstalledinnegative ground elec-

trical systems only. Reverse polarity will cause the

cable fuse to blow. Check the vehicle ground polar-

ity before installation to prevent wasted time

effort.

2.

Connect the positive power lead directly to the ve-

hicle battery positive terminal. Connecting the Posi-

tive lead to any other positive voltage source

vehicle

adequate to support the radio's weight. Al-

sufficient space around the radio for air cooling.

is

preferred, bond the trunk lid and

not recommended.

an

antennaisin

8e

the center

be

sure the mounting

and

in

the

5-2. Radio location

Select a convenient location for your control station radio which entry point. Secondly, use your system's power supply

is

(which supplies the voltage and current required for your system). Make sure sufficient air the radio and power supply to allow adequate cooling.

isascloseaspractical to the antenna cable

can

flow

around

SERVICE

This radioisdesigned for easy servicing. Refer to the schematic diagrams, printed circuit board views, and

alignment procedures containedinthis manual.

Note

When you modify your radioasdescribedinsystem set-up, take the following precaution.

The rating of pin 7 (58) of the accessory connector cable

(KCT-19) Insert a 1A fuse if you use the equipment.

on the rear of the radioisl3.6V

58

pin for external

(lA).

CAUTION

IfDCpoweristo be controlled by the vehicle ignition switch, a switching relay should be usedtoswitch the positive controls DC to the relay coil.

3.

4.

power

Connect the ground lead directlytothe negative terminal. The cable provided handle the maximum radio current demand. If the cable must is

sufficient for the current tobecarried

of

the added lead.

lead.

The

vehicle ignition switch then

with

the radioissufficient to

be

extended, be sure the additional wire

and

4

battery

length

If you do not intend to use the 3.5-mm jack for the external speaker, (809-0235-XX) to stop dust

fit

the

supplied speaker-jack cap

and

sand getting

in.

TK-760/762

(

( License and

(

Merchandise

Choose

Are

Transceiver

I

frequency

the

typeoftransceiver

you

using

programming

(Option)

received

allocated by

the

signaling?

NO

FCC)

SYSTEM

)

-----.j

'\

./

""\

YES

./

ISee page

A personal

and

(The

6.

programming

frequency

Display:

32ch

TK-760/H I

Display:

I 2ch

TK-762/H

I

computer

and

SET-UP

LCD

models

DTMF decoder

(IBMPCor

software

signaling

I

LED

I I

I

(KPG-29DI are required

(option) data are

(Dealer

option)

compatible),

Frequency range (MHz)RFpower

148-174 136-156 148-174 136-156

Frequency range (MHz)RFpower

148-174 136-156 148-174 136-156

See page 11. Installation when

programming

programmed

the

used

IC:

for

programming.

control LC73881M (SANYO).

interface (KPG-4), for

25W 25W 45W HK 45W

25W K 25W 45W 45W

unit

the transceiver.)

Type

K

K2

HK2

Type

K2 HK

HK2

Are

(

( .

you

Are you using

Are

you uSing t e

(

using the

the

h'

Delivery

public

address?

NO

external speaker?

NO

..

Ignition

sense

NO

'\

YES

./

J

I

KAP-l

PA/HA

unit

(Option)

See page 10. Installation the TX-RX when

used

KAP-l.

unit

I

See page 12.

""\

YES

./

I KES-3

External speaker

I

(Option)

I

cable

(Option)

7.

I KCT-18 I

I

Ignition

See page

YES

~

Accessory

bl 7

""\

ca

e.

./

KCT-19

connector

See page

sense cable

(Option)

9.

5

TK-760/762

OPERATING

1.

Transceiver Programming

1-1. Introduction

The TK-760/762 transceiverisprogrammed using

IBMPCor compatible machine, a programming inter-

(KPG-4),

face

ure 1 shows the setup foranIBM

and a programming disk (KPG-29D).

PC.

Fig-

an

FEATURES

Communication

port

(RS-232Cl

Programming

1-2. KPG-4 Description

(OptionalPCprogramming interface cable)

The the computer. It (25-pin) case that converts the RS-232C logic level to TTL level. The socket of the TK-760/762 and to the computer conversion cable (option) tor and a 25-pin male connector.

1-3. Programming

KPG-29Disthe programming software for the 760/762, suppliedona 3.5" or 5.25" floppy disk. This software runs under MS-DOS (version 3.3 or later) an

IBM-PC/XT,

Data

can edited printed.

disk (KPG-29Dl

KPG-4isreeded to connect the TK-760/762 to

has

a circuitinthe D-subconnector

KPG-4

AT,orPS2,

be input to or read from the TK-760/762,

on

the

screen.

plugisconnected to external

with

a 9-pin female connec-

Software

Description

or on acompatible machine.

Programmed

data can be

by

TK-

on

and

Fig. 1

a

1-4. Data Program

In

this mode, dataiswritten into the flash memory

in

the transceiver. When the poweristurned on, data program mode KPG-4isconnected and commands "PROGRAM" mode

has

Tuning

in

the same wayasin carry out panel tuning by selecting test mode on the KPG-29D menu screen and following the instructions

on the screen. See the KPG-29D instruction manual for details.

is

been entered.

canbedone usinganIBMPCand KPG-29D,

Mode

canbeentered immediately. When the

canbereceived,

displayed to indicate that data program

panel tuning mode. You

can

6

TK-760/762

OPERATING

1-5. Clone

Programmed dataistransferred from one trans-

ceiver to another by using a microphone cable.

1.

Connect the master set to the slave set master set

2.

Turn the slave set on.

3.

Hold down the and keep the onds. "-C-" appears on the display to indicate that clone mode has been entered.]

Mode

is

TK-760 only.

(Figure

CH

21

[Tj

key, turn the master set on,

[Tj key down for

FEATURES

with

two

more sec-

but the

/INSTALLATION

4.

Press the MON keyonthe master set. The~mark appears and data slave set. "-PC-" appears that itisreceiving data.

5.

When cloningiscomplete, the~markonthe master set disappears slave

setisautomatically reset and enters user

mode.

If cloning fails, the master set shows "ErrOr".

peat steps 4 and

If you wishtoclone several sets, switch each

them on and repeat 4 and

is

sent from the master settothe

on

the slave set to

and

"-C-" changes to

5.

"END".

show

The

Re-

of

INSTALLATION

1.

Accessory Connection Cable

(KCT-19 : Option)

The KCT-19isan

connecting external equipment. The connector has

pins and the necessary signal lines are selected for use.

1-1. Installing

1.

Remove the upper and lower halves of the trans-

ceiver case, and lift the

the chassis.

2.

Remove the pad

the

accessory connection cable for

KCT-19inthe

DC

(f)

I.

transceiver

cord bushing (

0)

15

from

Fig. 2

Fig. 1

7

TK-760/762

3.

Insert the The chassis.

4.

Relocate theDCcord bushinginthe chassis (

KCT-19

wire

harness band

cable

(e)

into the chassis

(0)

must

INSTALLATION

(0).

be inside the

0).

5.

Connect showninFigure 2 (

6.

Connect the serting the crimp terminal (

(0),

the

KCT-19tothe

KCT-19

both of which

TX-RX

unit

(A/2)

0).

to the external accessory by in-

9)

into the square plug

are

supplied

with

the

KCT-19.

as

1-2. Terminal function

No.

(A)

No.

(B,C.D) A-1 A-2 A-3 0-3

A-4 A-5 0-6 A-6

A-7 A-S A-9 0-4

A-10 A-l1 A-12 A-13

A-14 A-15

.

Refer to Terminal functiononpage 49, if need descriptionindetail. Connect CN5 of the radio to connector C of the

.

speaker.

0-2 0-5

0-1

B-2 B-3

0-7

B-1 D-S C-1

E-1

E-2 E-3

Name Function HK/CHS MIC hook input/Channel select ME MIC GND IGN DEO Detect output MI MIC input E GND SB PH 01 HOR SO SP AM MM TXS

Ignition input

DC

supply

(1A)

PH

input Data mod input Horn Alert output Squelch output Audio output PNHR2 Audio mute input MIC mute input Signal indicating whether the transceiver is transmitting or not.

KCT-19

instead of to the internal speaker connector, if use external

Fig. 2

KAP-1

Instllated

<<<<<<<<<-

HR1

<-

<<<-

8

INSTALLATION

2.

Ignition

The tion function. The ignition function lets you turn the power key.

If you use the Horn Alert function, you function off while driving with the ignition key.

Sense Cable (KCT-18 : Option)

KCT-18isan

to the transceiver on

optional cable for enabling the igni-

and

off

with

the car ignition

can

turn the

TK-760/762

2-1. Connecting

1.

Install the

19 section.)

2.

Insert the KCT-18 lead terminal

square plug (

sert

the

(0)·

2-2. Modifying

Modify or the Horn Alert function key.

1.

Remove the lower halfofthe transceiver case.

2.

Set jumper resistors (On)

unit

the transceiverasfollows to turn the power

(A/2)asshowninTable

the

KCT

-18tothe

KCT-19inthe transceiver.

(f))

0) supplied

square plug into

the

transceiver

on

with

the

and

R5

1.

the

KCT-19

off

and

transceiver

(See

into pin 3 of the

KCT-19,

with the ignition

R6

of the

) )

Db

~

U0

~

ANT

~

t®1

the

KCT-

then in-

connector

TX-RX

) ) )

~

TX-RX

A/2

0

UNIT

0

~@

(011

@U

b

KCT-18

Fig. 3

i;==

"7

\\

[

~

.

t~

'--

R5

E;]

R6

10

tM

B

KCT-19

Fu

\

Operation

Power on/off and Horn Alert on/off Horn Alert on/off

The Horn Alert function assigned to the AUX key.

when

KCT-18isconnected

Table 1

can

R5 R6

Enable Enable

Disable Enable

Enable Disable

Disable Disable

R5

andR6setup chart

be turnedonand

j

~

KCT-18 cannot be connected

~

Power cannotbeturned

off

only if the function

Fig.

has

4

on

been

9