Introduction

This service manual details the latest service information for the IC-T21A/E and IC-S21A/E 144 MHz FM Transceivers. It covers multiple versions of each model, offering insights into their specifications, internal components, and operational circuits. The manual is intended for qualified service technicians.

Key Features and Specifications

The ICOM IC-T21A/E and IC-S21A/E are FM transceivers designed for 144 MHz operation. Key specifications include frequency coverage, output power, modulation systems, and receiver sensitivity. Detailed technical data for various models and versions are provided within the manual.

Service and Repair Information

This manual includes essential sections on disassembly instructions, circuit descriptions for receiver, transmitter, and PLL systems, adjustment procedures, and parts lists. Safety precautions, such as avoiding high voltage and proper handling of electronic components, are emphasized to ensure safe and effective servicing.

Model Variations

The document outlines different versions of the IC-T21A/E and IC-S21A/E models, each tailored for specific regions such as USA, Australia, Asia, Europe, Taiwan, and Denmark. Understanding these variations is crucial for accurate servicing and part ordering.