Icom IC-E90 - Service Manual

S-13903MZ-C2
2002 Icom Inc.
1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan
MULTIBAND FM TRANSCEIVER
ie90
ic-e90
IC-E90 (1,4)

Summary

Introduction and Safety

Safety Warnings

Critical safety warnings for transceiver operation.

Repair Guidelines

Essential guidelines for safe and effective transceiver repair.

Specifications Overview

General Device Specifications

Detailed technical specifications for the transceiver's general features.

Transmitter Performance Specifications

Technical details regarding the transceiver's transmitting capabilities.

Receiver Performance Specifications

Technical details regarding the transceiver's receiving capabilities.

Disassembly Procedures

Rear Panel Disassembly Steps

Step-by-step guide to remove the rear panel.

Logic, AF, RF Unit Disassembly

Steps for removing logic, AF, and RF units.

Circuitry Description

Receiver Circuitry Details

Detailed explanation of the transceiver's receiver circuit functions.

AF Amplifier Circuit Function

Detailed explanation of the AF amplifier circuit.

Drive;Power Amplifier Circuit Details

Explanation of drive and power amplifier circuits in the RF unit.

RF Circuitry Details

Description of the RF circuit's function and components.

Squelch Circuit Functionality

Explanation of noise and tone squelch circuit functionality.

TX Filter Circuit Function

1 st Mixer and IF Circuit Operation

Description of 1st mixer and IF circuit operations.

APC Circuit Operation

2 nd IF and Demodulator Circuit Operation

Explanation of 2nd IF and demodulator circuit functions.

Transmitter Circuitry Overview

Overview of the transceiver's transmitter circuit functions.

PLL Circuit Description

VCO Circuits and Divider Circuit

Power Supply Circuits

Adjustment Procedures

Preparation and Required Equipment

Adjustment Mode Usage

Test Equipment Connection Guide

Trimmer Adjustments

PLL Lock Voltage Adjustment Steps

Power Balance Adjustment Steps

Adjustment Mode Settings

Reference Frequency Adjustment

Output Power Adjustments (11 V Bands)

Output Power Adjustments (8 V Bands)

Output Power Adjustments (8 V Low Power)

Output Power Adjustments (5 V Bands)

FM;DTMF Deviation Adjustments

CTCSS;DTCS Deviation Adjustments

Detector Coil and RF Tracking Adjustments

Automatic RF Tracking Procedure

S-Meter Adjustment Procedure

Block Diagrams

Logic Unit Functional Block Diagram

VCO, AF, RF Unit Block Diagrams

Icom IC-E90 Specifications

General

Brand	Icom
Model	IC-E90
Category	Transceiver
Language	English