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Revox A78 Service Manual

Revox A78
62 pages
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Revox A78 Specifications

General IconGeneral
Power Output40 watts per channel into 4Ω (stereo)
Frequency Response20Hz to 20kHz
Speaker Load Impedance4Ω to 16Ω
Weight10 kg
TypeStereo Integrated Amplifier
Input Sensitivity150mV (line)
OutputTape Out
Input Impedance47kΩ (line)

Summary

General Operation and Controls

Front Panel Controls Overview

Explanation of basic unit functions and input/output selection (items 1-8).

Tone, Filter, and Loudness Controls

Detailed description of tone adjustment and filtering capabilities (items 9-15).

Front Panel Outputs and Tape Functions

Description of front panel connectors, tape monitoring, and special mode controls (items 16-23).

Rear Panel Connections

Detailed identification of all rear panel input/output, speaker, and power connectors (items 30-46).

Technical Specifications

Performance Data

Comprehensive technical performance metrics for different B750 models.

Component Complement and Power

Details on internal components, power requirements, and physical characteristics.

Mechanical Dimensions

Visual representations of the device's physical dimensions for different configurations.

Service and Maintenance Procedures

Dismantling Procedures

Step-by-step instructions for removing external panels and the operating section.

Fuse and Power Stage Replacement

Procedures for removing the power amplifier stage and replacing fuses for maintenance.

Functional Description and Protection Systems

Overview of signal routing, controls, and amplifier safety features.

Electrical Adjustments and Performance Verification

Procedures for testing and verifying electrical performance and adjustments.

Circuit Diagrams and Component Lists

Wiring and Block Diagrams

Overall wiring and simplified block representations of the B750's architecture.

Power Supply and Input Units

Schematics and component lists for power supply and input stages.

Amplifier, Control, and Protection Units

Circuit diagrams and component lists for audio processing, control, and power amplifier modules.

Operating Section

Exploded View and Parts List

Visual guide to the front panel assembly and a comprehensive list of its parts.

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