Audio Device and Home Theater Repair in Depth: A Practical Repairman’s Guide to Power, Amplifiers, Speakers, Signal Paths, Receivers, Soundbars, and Protection Circuits

Audio Device and Home Theater Repair in Depth: A Practical Repairman’s Guide to Power, Amplifiers, Speakers, Signal Paths, Receivers, Soundbars, and Protection Circuits by Jeffrey Howard Moses
English | 2026 | PDF, EPUB | 865 pages | 10.1 Mb

Learn how to trace audio faults systematically—from complete loss of sound and protection-mode shutdowns to distortion, noise, amplifier failures, and power-supply problems.

Audio Device and Home Theater Repair in Depth is Book 6 of The Electronic Device Repair Bench, an 11-book practical repair series built around evidence-based troubleshooting, careful testing, and sound repair decisions.

Audio equipment can be deceptively complex. A receiver with no sound may have a power-supply problem, protection fault, failed amplifier stage, missing signal, control-system issue, or speaker-related problem. Hum, distortion, intermittent audio, and shutdowns can originate in entirely different sections of the same device.

This book teaches a structured approach to finding the actual cause.

Topics include:

No-power and no-sound diagnosis
Power supplies, rails, regulators, and standby circuits
Audio signal paths and stage-by-stage troubleshooting
Preamplifier and power-amplifier sections
Output transistors and amplifier-stage faults
Protection circuits and protection-mode diagnosis
DC offset and abnormal speaker-output conditions
Receivers and home-theater electronics
Powered speakers, soundbars, and subwoofers
Speakers, drivers, crossovers, and wiring
Inputs, outputs, jacks, switches, and controls
Hum, buzz, hiss, noise, and grounding problems
Distortion, clipping, weak output, and channel imbalance
Thermal, intermittent, and load-related faults
Board-level diagnosis, repair decisions, and final verification

The emphasis throughout is on following both power and signal paths. Instead of assuming that a silent channel means a failed amplifier—or that protection mode automatically means bad output transistors—you learn to determine where normal operation stops and what the evidence actually proves.

The book also explains how symptoms change under different loads, temperatures, input conditions, and operating modes. These clues can help distinguish problems in the power supply, amplifier, protection system, speakers, connections, or control circuitry.

Written for electronics hobbyists, audio repairers, refurbishers, developing technicians, and technically minded readers, the book combines practical troubleshooting with enough circuit-level depth to make measurements meaningful.

More advanced diagnostic material is included where useful, while appropriate safety boundaries are maintained around mains-powered equipment, charged capacitors, high-current amplifier sections, and procedures requiring specialized equipment or experience.

Whether you are troubleshooting a silent receiver, distorted amplifier, malfunctioning soundbar, noisy powered speaker, or home-theater system stuck in protection mode, this book provides a practical framework for moving from symptom to confirmed cause.

Follow the power. Follow the signal. Find where normal operation stops—and confirm the fault before replacing parts.

Contents:

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