Introduction
This document serves as a comprehensive service manual for the Onkyo HT-R330 AV Receiver. It contains essential information for servicing and maintaining the unit, including detailed specifications, operational checks, safety procedures, and diagnostic modes. The manual is designed to assist qualified service personnel in troubleshooting and repairing the AV receiver.
Key Features and Specifications
The Onkyo HT-R330 is an AV receiver designed for home theater systems. Key specifications include:
- Amplifier Section: Details on power output, dynamic power, THD, damping factor, input sensitivity, and frequency response.
- Tuner Section: Specifications for FM and AM tuning, usable sensitivity, signal-to-noise ratio, and THD.
- Video Section: Information on composite video inputs and outputs.
- Audio Section: Details on digital and analog audio inputs, as well as analog audio outputs and speaker outputs.
- General Specifications: Power supply requirements, power consumption, dimensions, and weight.
Service Procedures
The manual outlines critical service procedures, including:
- Replacing fuses with the correct type and rating.
- Performing safety checks, such as insulation resistance tests.
- Initializing the unit to factory settings.
- Checking the microprocessor version.
- Understanding the memory backup system.
Operation Checks
Detailed step-by-step guides are provided for various operation checks:
- SPEAKER PROTECT-1 (DC VOLTAGE DETECTION): Procedures for checking DC voltage detection in speaker outputs.
- SPEAKER PROTECT-2 (CURRENT DETECTION): Procedures for checking current detection in speaker outputs.
- CONTROL OF POWER SUPPLY (OUTPUT SENSOR AND THERMAL SENSOR): Checks related to power supply output sensors and thermal sensors.
- DSP DEBUG MODE: Instructions for entering and utilizing the DSP debug mode for circuit analysis.
Diagrams and Views
The manual includes visual aids crucial for servicing:
- Exploded Views: Detailed diagrams showing the assembly of internal components.
- Block Diagram: An overview of the unit's internal circuitry and signal flow.
- Schematic Diagrams: Technical diagrams illustrating the electronic connections and components.
Safety Information
A prominent safety-related component warning highlights critical parts that pose a risk of fire and electric shock. It emphasizes using only specified replacement parts and performing necessary safety measurements before returning the unit to the customer.
