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Zenith Royal 3000-1 Service Manual

Zenith Royal 3000-1
12 pages
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Zenith Royal 3000-1 Specifications

General IconGeneral
Power Out500 mW
Year Introduced1965
Tuning PrincipleSuperheterodyne
LoudspeakerDynamic speaker
MaterialPlastic
ShapePortable

Summary

GENERAL

Receiver Overview and Features

Details the Royal 3000-1's frequency coverage, battery life, speaker, earphone jack, and antenna system.

FM SECTION

FM Tuner and AFC Operation

Explains the FM tuner circuit, including RF amplifier, autodyne stage, IF stages, and the AFC system.

AM SECTION

AM Superheterodyne Circuitry

Covers the AM superheterodyne circuit, common base and common emitter circuitry, and AGC voltage.

AUDIO SYSTEM AND OPERATION

Audio System and Tuner Functionality

Describes the common audio system and its use as an external FM-AM tuner.

AC Operation and Power Requirements

Details AC operation, including the optional power supply unit and connection method.

TRANSISTOR MANAGEMENT AND MAINTENANCE

Output Transistor Matching

Explains the importance of matching output transistors according to group charts.

Component Replacement Precautions

Provides guidance on component replacement, especially regarding heat transfer to transistors.

SIGNAL TRACING AND SERVICE NOTES

Signal Tracing Best Practices

Warns against improper testing methods and recommends standard signal tracing.

DIAL CORD DRIVE SYSTEM

Dial Cord Drive Assembly and Routing

Illustrates the dial cord drive mechanism with front and rear views and provides instructions for assembly.

FM ALIGNMENT PROCEDURE

AM ALIGNMENT PROCEDURE

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