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Icom IC-R71 Service Manual

Icom IC-R71
101 pages
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Table of Contents

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Icom IC-R71 Specifications

General IconGeneral
Power Requirements13.8 V DC
Frequency Range0.1-30 MHz
Modulation ModesAM, FM, SSB, CW
Sensitivity0.5 μV (SSB)
Selectivity2.4 kHz (SSB)
Image Rejection70 dB
IF Bandwidths6 kHz
Power SupplyAC or DC

Summary

SECTION 1 SPECIFICATIONS

SECTION 2 CONTROLS AND THEIR FUNCTIONS

Tuning and Frequency Selection

Details controls for tuning, frequency bands, and VFO/memory selection.

SECTION 4 BLOCK DIAGRAM

SECTION 5 OPERATION

SECTION 6 DISASSEMBLY

SECTION 6 CONNECTOR CONNECTIONS

SECTION 7 ADJUSTMENTS

PLL Adjustment Guide

Provides a step-by-step guide for performing calibration and adjustments on the PLL unit.

Receiver Adjustment Guide

Details procedures for adjusting receiver performance parameters and sensitivity.

SECTION 8 CIRCUIT AND VOLTAGE DIAGRAMS

Main Unit Circuit Diagram

Presents the detailed circuit and voltage diagram for the main unit.

RF Unit Circuit Diagram

Presents the detailed circuit and voltage diagram for the RF unit.

PLL Unit Circuit Diagram

Presents the detailed circuit and voltage diagram for the PLL unit.

Logic Unit Circuit Diagram

Presents the detailed circuit diagram for the logic unit.

SECTION 11 SCHEMATIC DIAGRAM

Overall Schematic Diagram

Presents a comprehensive schematic diagram illustrating the entire IC-R71A/E/D system.

SECTION 12 BOARD LAYOUT