Kenwood TK 7102 H Service Manual

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VHF FM TRANSCEIVER

TK-71 02H

SERVICE MANUAL
REVISED

KENWOOD

© 2003-6 PRINTED IN JAPAN
851-8610-10 (N) 975

This service manual applies to products with 50300001 or subsequent serial numbers.

In terms of the products with the serial numbers earlier than 50300001, refer to the TK-7102H service manual as per part No.
851-861000 and 851-8627AOO.

Cabinet
IA01»2181-0|I

Chassis
IA10-4048-2I )

Panel assy
IA62-0942-03)

Front glass
IB10-2753-03)

Modular jack Key top
IE08-0877-05) (K29»9065-0| I
CONTENTS
GENERAL .................................................. 2 PACKING ................................................. 28
SYSTEM SET-UP ........... . 3 ADJUSTMENT ................. 29
OPERATING FEATURES . 4 TERMINAL FUNCTION ........................... 34
REALIGNMENT .. .. 8 PC BOARD
INSTALLATION ............................. 11 DISPLAY UNIT (X54-3460-20I ............ 35
DISASSEMBLY FOR REPAIR .. ..... 13 TX-RX UNIT (X57-6700-XXI . ..... 37
CIRCUIT DESCRIPTION ................ 14 SCHEMATIC DIAGRAM ................ 43
SEMICONDUCTOR DATA ..... 18 BLOCK DIAGRAM ............ 47
COMPONENTS DESCRIPTION ..... 20 LEVEL DIAGRAM .......... 49
PARTS LIST ............................................. 21 SPECIFICATION ...................................... 51
EXPLODED VIEW .................................... 27
Service Manual List
Title Parts number Remarks Destination TX-RX unit number Display unit number

TK-7102H B51 -861 0-00 M X57-6380-ZO X54»3340-20

TK-7102H B51 -8627-OO SUPPLEMENT K, KZ, M,M2 X57-6380-XX X54»3340-20

TK-7102H B51 -861 0-1 0 REVISED K, K2, M,M2 X57-6700-XX X54-3460-20

(This service manual)

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TK-7102H

GENERAL

INTRODUCTION

SCOPE OF THIS MANUAL

This manual is intended for use by experienced techniA
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. lf 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.

PERSONNEL SAFETY

The following precautions are recommended for person-

nel safety :

0 DO NOT transmit if someone is within two feet (0.6
meter) of the antenna.

. DO NOT transmit until all RF connectors are secure and
any open connectors are properly terminated.

0 SHUT OFF this equipment when near electrical blasting
caps or while in an explosive atmosphere.

. All equipment should be properly grounded before power4
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 adiusted 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.

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.