KENWOOD TK782 Service Manual

KENWOOD TK782 Service Manual
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Service Manual for KENWOOD TK782, downloadable as a PDF file.

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The manual has 90 pages
File size: 6.34 MB
Available language versions: Japanese, English
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Sample pages

B51-8619-00 (N) 611

TK-782

SERVICE MANUAL /

GENERAL ................................................................. 2

OPERATING FEATURES ......................................... 5

REALIGNMENT ...................................................... 23

INSTALLATION ...................................................... 28

CIRCUIT DESCRIPTION ......................................... 35

SEMICONDUCTOR DATA ..................................... 42

DESCRIPTION OF COMPONENTS ....................... 45

PARTS LIST............................................................ 49

EXPLODED VIEW .................................................. 57

PACKING ................................................................ 58

ADJUSTMENT ....................................................... 59

TERMINAL FUNCTION ......................................... 76

PC BOARD VIEWS

PLL/VCO (X58-4712-71) ................................... 78

TX-RX UNIT (X57-6143-01) (A/2)..................... 79

TX-RX UNIT (X57-6143-01) (B/2) ..................... 85

SCHEMATIC DIAGRAM ........................................ 89

BLOCK DIAGRAM .................................................. 97

LEVEL DIAGRAM................................................. 100

SPECIFICATIONS................................................. 102

CONTENTS

VHF FM TRANSCEIVER / VHF

Cabinet (Upper)

(A01-2165-23)

Panel assy

(A62-0642-03)

Key top

(K29-9105-22)

PLL/VCO (X58-4712-71)

TX-RX UNIT (X57-6143-01) (A/2)

TX-RX UNIT (X57-6143-01) (B/2)

100

103

B51-8619-00 (N) 611

TK-782

SERVICE MANUAL /

GENERAL ................................................................. 2

OPERATING FEATURES ......................................... 5

REALIGNMENT ...................................................... 23

INSTALLATION ...................................................... 28

CIRCUIT DESCRIPTION ......................................... 35

SEMICONDUCTOR DATA ..................................... 42

DESCRIPTION OF COMPONENTS ....................... 45

PARTS LIST............................................................ 49

EXPLODED VIEW .................................................. 57

PACKING ................................................................ 58

ADJUSTMENT ....................................................... 59

TERMINAL FUNCTION ......................................... 76

PC BOARD VIEWS

PLL/VCO (X58-4712-71) ................................... 78

TX-RX UNIT (X57-6143-01) (A/2)..................... 79

TX-RX UNIT (X57-6143-01) (B/2) ..................... 85

SCHEMATIC DIAGRAM ........................................ 89

BLOCK DIAGRAM .................................................. 97

LEVEL DIAGRAM................................................. 100

SPECIFICATIONS................................................. 102

CONTENTS

VHF FM TRANSCEIVER / VHF

Cabinet (Upper)

(A01-2165-23)

Panel assy

(A62-0642-03)

Key top

(K29-9105-22)

PLL/VCO (X58-4712-71)

TX-RX UNIT (X57-6143-01) (A/2)

TX-RX UNIT (X57-6143-01) (B/2)

100

103

TK-782

GENERAL /

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 the publica-

tion data. Changes which may occur after publication are

covered by either Service Bulletins or Manual Revisions.

These 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, or 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 re-

quired component for proper identification.

PERSONNEL SAFETY

The following precautions are recommended for person-

nel safety :

! DO NOT transmit if someone is within two feet (0.6 meter)

of the antenna.

! DO NOT transmit until all RF connectors are verified se-

cure and any open connectors are properly terminated.

SHUT OFF and DO NOT operate this equipment near elec-

trical blasting caps or in an explosive atmosphere.

! All equipment should be properly grounded before power-

up for safe operation.

! This equipment should be serviced by a qualified techni-

cian only.

PRE-INSTALLATION CONSIDERNATIONS

1. UNPACKING

Unpack the radio from its shipping container and check

for accessory items. If any item is missing, please contact

KENWOOD immediately.

2. PRE-INSTALLATION CHECKOUT

2-1. Introduction

Each radio is adjusted and tested before shipment. How-

ever, it is recommended that receiver and transmitter opera-

tion be checked for proper operation before installation.

2-2. Testing

The radio should be tested complete with all cabling and

accessories as they will be connected in the final installa-

tion. Transmitter frequency, deviation, and power output

should be checked, as should receiver sensitivity, squelch

operation, and audio output. QT equipment operation should

be verified.

TK-782

3. PLANNING THE INSTALLATION

3-1. General

Inspect the vehicle and determine how and where the ra-

dio antenna and accessories will be mounted.

Plan cable runs for protection against pinching or crush-

ing wiring, and radio installation to prevent overheating.

3-2. Antenna

The favored location for an antenna is in the center of a

large, flat conductive area, usually at the roof center. The

trunk lid is preferred, bond the trunk lid and vehicle chassis

using ground straps to ensure the lid is at chassis ground.

3-3. Radio

The universal mount bracket allows the radio to be

mounted in a variety of ways. Be sure the mounting surface

is adequate to support the radio's weight. Allow sufficient

space around the radio for air cooling. Position the radio

close enough to the vehicle operator to permit easy access

to the controls when driving.

3-4. DC Power and wiring

1. This radio may be installed in negative ground electrical

systems only. Reverse polarity will cause the cable fuse

to blow. Check the vehicle ground polarity before installa-

tion to prevent wasted time and effort.

2. Connect the positive power lead directly to the vehicle

battery positive terminal. Connecting the Positive lead to

any other positive voltage source in the vehicle is not rec-

ommended.

3. Connect the ground lead directly to the battery negative

terminal.

4. The cable provided with the radio is sufficient to handle

the maximum radio current demand. If the cable must be

extended, be sure the additional wire is sufficient for the

current to be carried and length of the added lead.

4. INSTALLATION PLANNING - CONTROL STATIONS

4-1. Antenna system

Control station. The antenna system selection depends

on many factors and is beyond the scope of this manual.

Your KENWOOD dealer can help you select an antenna sys-

tem that will best serve your particular needs.

4-2. Radio location

Select a convenient location for your control station radio

which is as close as practical to the antenna cable entry point.

Secondly, use your system's power supply (which supplies

the voltage and current required for your system). Make sure

sufficient air can flow around the radio and power supply to

allow adequate cooling.

GENERAL /

TK-782

SERVICE

This radio is designed for easy servicing. Refer to the

schematic diagrams, printed circuit board views, and align-

ment procedures contained in this manual.

Note

When you modify your radio as described in system set-

up, take the following precaution.

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

(KCT-19) on the rear of the radio is 13.6V (0.75A). Insert a 1A

fuse if you use the SB pin for external equipment.

Accessory connector

cable (KCT-19)

If you do not intend to use the 3.5-mm jack for the exter-

nal speaker, fit the supplied speaker-jack cap (B09-0235-05)

to stop dust and sand getting in.

Speaker-jack cap

(B09-0235-05)

GENERAL /

TK-782

OPERATING FEATURES /

1. Operation Features

The TK-782 is a VHF FM radio designed in DTMF/DMS

model.

This transceiver can handle up to 250 groups with 250

channels in each group.

You can use option signalling which is DTMF or DMS (Digi-

tal Message System-FFSK signalling) for every channel.

2. Transceiver Controls and Indicators (Fig. 1)

2-1. Front Panel Controls

All the keys on the front panel are momentary-type push

buttons. The functions of these keys are explained below.

POWER key

Transceiver POWER key. When the power is switched

off, all the parameters, such as the group and channel, are

stored in memory. When the power is switched on again,

the transceiver returns to the previous conditions.

CHANNEL UP/DOWN key

CALL key (Programmable)

key (Programmable)

A, B, C and D key (Programmable)

VOLUME UP/DOWN key (Programmable)

BUSY/TX LED

The BUSY indicator (Green LED) shows that the channel

is in use. The TX indicator (Red LED) shows that you are

transmitting.

2-2. Programmable Keys

The FPU (KPG-77D) enables programmable keys to select

the following functions.

Auto Dial

To transmit the stored DTMF code automatically. When

you select DTMF encode in the "Auto dial mode" menu, Auto

dial, Redial, Dial ID and Store

Send modes are available.

Press the [Auto dial] key to enter the "Auto dial mode".

Select the desired number to send. It is use the [Channel

up] and [Channel down] keys, or the [2] and [8] keys on the

microphone to select. Press the [*] key to transmit the num-

bers.

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