Kenwood TK-7102H Service Manual

© 2001-11 PRINTED IN JAPAN
B51-8610-00
(
N
)
1051
VHF FM TRANSCEIVER
TK-7102H
SERVICE MANUAL
GENERAL .................................................. 2
OPERATING FEATURES .......................... 3
REALIGNMENT ......................................... 7
DISASSEMBLY FOR REPAIR ................... 9
CIRCUIT DESCRIPTION .......................... 10
SEMICONDUCTOR DATA ...................... 15
DESCRIPTION OF COMPONENTS ........ 17
PARTS LIST ............................................. 19
EXPLODED VIEW.................................... 25
PACKING ................................................. 26
ADJUSTMENT ........................................ 27
TERMINAL FUNCTION ........................... 32
PC BOARD VIEWS
DISPLAY UNIT (X54-3340-20) ............ 33
TX-RX UNIT (X57-6380-20) ................ 35
SCHEMATIC DIAGRAM.......................... 41
BLOCK DIAGRAM ................................... 45
LEVEL DIAGRAM .................................... 47
SPECIFICATIONS .................................... 49
CONTENTS
Panel assy
(A62-0942-03)
Front glass
(B10-2668-03)
Cabinet
(A01-2181-01)
Chassis
(A10-4048-11)
Key top
(K29-9065-01)
Modular jack
(E08-0877-05)

Kenwood TK-7102H Specifications

General

Frequency Range	136-174 MHz
Channel Capacity	128
Channel Spacing	12.5 / 25 kHz
Operating Temperature	-30°C to +60°C
Battery Life	N/A (Mobile Transceiver)
Modulation	FM

Summary

General Information

Personnel Safety Precautions

Essential safety measures for operation and servicing.

Installation Planning and Checkout

Operating Features

Key Function Explanations

Front Panel Controls and Functions

Describes controls, indicators, and microphone interface.

Front Panel Controls and Programmable Keys

Detailed explanation of specific controls and programmable key functions.

Scan Operation Details

Auxiliary Programmable Functions

Realignment Procedures

Operating Modes and Entry

Describes different operating modes and how to enter them.

Cloning and Data Management

Details cloning, password, software, and PC programming.

PC Mode and Connectivity

Disassembly for Repair

Component Removal Procedures

Circuit Description

Frequency Configuration and PLL

Explains frequency generation, PLL, and VCO.

Signal Processing Circuits

PLL and VCO Circuits

Detailed explanation of PLL synthesizer, VCO, and unlock circuit.

Transmitter System and Control

Covers power amplifier, APC circuit, control circuit, and memory.

Input/Output and Signal Processing Circuits

Receiver System Overview

Semiconductor Data

Microprocessor Pin Functions

Lists pins and functions for the TX-RX Unit IC6 microprocessor.

Transceiver Component Pinouts

Description of Components

Parts List

Exploded View

Packing Information

Adjustment Procedures

Required Test Equipment and Specifications

Lists necessary equipment and their major specifications for alignment.

Adjustment Points and Notes

Drive FET (Q800) Replacement and Heat Conductor

PCB Section Adjustments

Transmitter Section Adjustments

Details frequency, power, balance, sensitivity, and deviation adjustments.

Receiver Section Adjustments

Transmitter Power Measurement Notes

Terminal Function

TX-RX Unit Connector Pinouts

PC Board Views

Schematic Diagram

Overall Circuit Schematic

Provides a detailed schematic of the transceiver's circuitry.

Block Diagram

System Block Diagram

Illustrates the main functional blocks and signal flow of the transceiver.

Level Diagram

Receiver and Transmitter Signal Levels

Specifications

General and Receiver Specifications

Covers frequency, channels, voltage, sensitivity, selectivity, and intermodulation.

Transmitter Specifications

Details power output, modulation, FM noise, and frequency stability.