KENWOOD TK8108 - Service Manual Immediate Download

SERVICE MANUAL /

B51-8593-10 (N) 621

UHF FM TRANSCEIVER / UHF

TK-8108

Panel assy

(A62-0942-03)

Front glass

(B10-2753-03)

Cabinet

(A01-2178-02)

Key top

(K29-9065-01)

Modular jack

(E08-0877-05)

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

SYSTEM SET-UP ...................................... 5

OPERATING FEATURES .......................... 6

REALIGNMENT ....................................... 13

INSTALLATION ....................................... 19

DISASSEMBLY FOR REPAIR ................. 23

CIRCUIT DESCRIPTION .......................... 24

SEMICONDUCTOR DATA ...................... 32

COMPONENTS DESCRIPTION .............. 34

PARTS LIST ............................................. 36

EXPLODED VIEW .................................... 42

CONTENTS

REVISED /

This service manual applies to products with 50800001 or

subsequent serial numbers.

In terms of the products with the serial numbers earlier

than 50800001, refer to the TK-8108 service manual as per

part No. B51-8593-00 or B51-8637-00.

PACKING ................................................. 43

ADJUSTMENT ........................................ 45

TERMINAL FUNCTION ........................... 52

PC BOARD

DISPLAY UNIT (X54-3460-20) ............ 54

TX-RX UNIT (X57-6923-XX) ............... 56

SCHEMATIC DIAGRAM .......................... 60

BLOCK DIAGRAM ................................... 64

LEVEL DIAGRAM .................................... 66

SPECIFICATION ...................................... 68

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TK-8108

Service Manual List

Title

Parts number

Remarks

Destination

TX-RX unit number

Display unit number

TK-8108

B51-8593-00

C, C3

X57-6303-XX

X54-3340-20

TK-8108

B51-8637-00

PDF only

X57-6303-01

X54-3340-20

TK-8108

B51-8593-10

REVISED

C, C3, M

X57-6923-XX

X54-3460-20

(This service manual)

GENERAL /

INTRODUCTION

SCOPE OF THIS MANUAL

This manual is intended for use by experienced techni-

cians familiar with similar types of commercial grade commu-

nications equipment. It contains all required service informa-

tion for the equipment and is current as of this publication

date. Changes which may occur after publication are covered

by either Service Bulletins or Manual Revisions, which 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, and 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 required

component for proper identification.

PERSONAL SAFETY

The following precautions are recommended for personal

safety :

·DO NOT transmit if someone is within two feet (0.6

meter) of the antenna.

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TK-8108

·DO NOT transmit until all RF connectors are secure and

any open connectors are properly terminated.

· SHUT OFF this equipment when near electrical blasting

caps or while in an explosive atmosphere.

· All equipment should be properly grounded before power-

up for safe operation.

· This equipment should be serviced by only qualified tech-

nicians.

PRE-INSTALLATION CONSIDERATIONS

1. UNPACKING

Unpack the radio from its shipping container and check for

accessory items. If any item is missing, please contact

KENWOOD immediately.

2. LICENSING REQUIREMENTS

Federal regulations require a station license for each radio

installation (mobile or base) be obtained by the equipment

owner. The licensee is responsible for ensuring transmitter

power, frequency, and deviation are within the limits permit-

ted by the station license.

Transmitter adjustments may be performed only by a li-

censed technician holding an FCC first, second or general

class commercial radiotelephone operator's license. There is

no license required to install or operate the radio.

3. PRE-INSTALLATION CHECKOUT

3-1. 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.

3-2. Testing

The radio should be tested complete with all cabling and

accessories as they will be connected in the final installation.

Transmitter frequency, deviation, and power output should

be checked, as should receiver sensitivity, squelch operation,

and audio output. Signalling equipment operation should be

verified.

4. PLANNING THE INSTALLATION

4-1. 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 crushing

wiring, and radio installation to prevent overheating.

4-2. 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.

4-3. 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.

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GENERAL /

TK-8108

4-4. 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 installation

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.

5. INSTALLATION PLANNING CONTROL STATIONS

5-1. 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 system

that will best serve your particular needs.

5-2. 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.

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

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

speaker, fit the supplied speaker-jack cap to stop dust and

sand from getting in.

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GENERAL /

Speaker

jack cap

Power input

connector

Antenna connector

TK-8108

SYSTEM SET-UP /

Merchandise received

Choose the type of transceiver

Transceiver programming

KCT-39

Connection cable

KCT-18

Ignition sense cable

KCT-36

Extension cable

KDS-100

Mobile data

terminal

KGP-2A

Modem GPS receiver or

KGP-2B

Modem GPS controller

KES-3

External speaker

See page 13.

A personal computer (IBM PC or compatible), programming interface (KPG-46),

and programming software (KPG-70D) are required for programming.

Frequency range (MHz)

RF power

Type

450~490

25W

C,M

400~430

25W

(Option)

Delivery

KCT-39

KCT-18

KCT-36

KDS-100

KGP-2A

Modem GPS

KGP-2B

Modem GPS

KES-3

(IBM PC)

(KPG-46)(KPG-70D)

(MHz)

400~430

25W

450~490

25W

C,M

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