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Onkyo AV Receiver Service Manual

Models: TX-SR674, TX-SR674E, TX-SR8467

Introduction

This service manual provides detailed technical information and procedures for servicing the Onkyo AV Receiver models TX-SR674, TX-SR674E, and TX-SR8467. It covers essential maintenance tasks, diagnostic tests, and troubleshooting steps to ensure optimal performance and longevity of these audio-visual components.

Key Procedures Covered

  • Fuse Replacement: Step-by-step instructions for safely replacing fuses, including identification of critical components for safety.
  • Unit Initialization & Memory Backup: Guidance on resetting the unit to factory settings and understanding the battery-less memory backup system.
  • Operation Checks: Detailed procedures for Speaker Protect (DC Voltage and Current Detection), Control of Power Supply (Output Sensor and Thermal Sensor), and DSP Debug Mode analysis to diagnose and resolve operational issues.
  • Component Identification: Exploded views and block diagrams are provided for easy identification of internal parts and signal flow.

For detailed technical specifications and safety precautions, please refer to the complete manual.

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