The AKIRA HTS-292-998 is a Home Theatre System designed to enhance the audio experience for various entertainment setups. This service manual provides comprehensive details for technicians, covering technical specifications, important safety measures, troubleshooting guides, and circuit diagrams. The system is branded with the slogan "makes life better," suggesting a focus on user experience and quality.
Function Description:
The AKIRA HTS-292-998 functions as a central audio hub for a home theatre setup. It processes audio signals from multiple input sources and outputs them to a multi-channel speaker system, including main, center, and surround channels. The system is designed to deliver a rich and immersive sound experience, suitable for movies, music, and other multimedia content. Its core functionality revolves around audio amplification and distribution, with features to control various aspects of the sound output. The inclusion of a remote control further enhances user convenience, allowing for easy operation from a distance. The system also incorporates safety features to protect both the device and the user, emphasizing responsible operation and maintenance.
Important Technical Specifications:
The AKIRA HTS-292-998 boasts several key technical specifications that define its performance and capabilities:
- Power Supply Standard: The system is versatile, supporting both
~110V/220-240V 50Hz/60Hz power inputs, making it suitable for various international power grids.
- Main Channel Output: It delivers a robust
50W x 2 output for the main channels, with a 4 ohm impedance, 1K frequency, and a low THD=2% (Total Harmonic Distortion), indicating clear and powerful audio.
- Center Channel Output: The center channel provides
10W of power at 4 ohm impedance and 1K frequency, with THD=10%. This ensures clear dialogue and central sound elements.
- SURR Channel Output: The surround channels also output
10W x 2 at 4 ohm impedance and 1K frequency, with THD=10%, contributing to an immersive surround sound experience.
- Channel Separate Rate: With a channel separate rate of
> 35dB, the system ensures good separation between audio channels, preventing bleed-over and maintaining sound clarity.
- Harmonic Distortion: The overall harmonic distortion is kept to
< 2%, which is a good indicator of audio fidelity, meaning the output sound closely matches the input without significant added distortion.
- Frequency Response: The system offers a wide frequency response of
20Hz~20KHz (±2dB), covering the full range of human hearing and ensuring accurate reproduction of both low and high frequencies.
- Input Sensitivity: An input sensitivity of
250mV indicates the level of input signal required for the amplifier to produce its rated output power.
- Weight: The unit weighs
5kg, suggesting a moderately sized and potentially robust build.
- Measurement: The dimensions of the unit are
430 x 330 x 60(mm), providing an idea of its physical footprint and how it might fit into a home entertainment setup.
Usage Features:
The AKIRA HTS-292-998 is designed with user convenience and safety in mind. Key usage features include:
- Multi-Channel Audio Output: The system supports main, center, and surround channels, providing a comprehensive home theatre audio experience.
- Multiple Input Sources: While not explicitly detailed, the circuit diagrams suggest various input options (e.g., TUNER, TAPE, VCD, DVD), allowing users to connect different audio sources.
- Remote Control Operation: The inclusion of a remote control (as indicated by troubleshooting sections) allows for convenient operation from a distance, including power on/off, volume control, and input selection. The remote has an operating range of
6m within a 30-degree angle from the front panel.
- Ventilation: The design incorporates grooves on the casing for proper ventilation, crucial for preventing overheating and ensuring safe, long-term operation. Users are advised to keep these grooves unblocked and maintain a minimum distance of
10 centimeters from walls.
- Safety Measures: The manual emphasizes several safety precautions, such as protecting the power supply line, preventing electric shock by avoiding liquid or metal objects from entering the machine, and not dismantling the casing.
- Troubleshooting Guide: A detailed troubleshooting section helps users diagnose and resolve common issues, such as no power, abnormal operation, no sound, or remote control malfunction, often guiding them to check connections, settings, or batteries.
Maintenance Features:
Maintenance of the AKIRA HTS-292-998 primarily focuses on safety and ensuring proper functionality. Key maintenance aspects include:
- Power Supply Line Protection: Users are advised to ensure the power supply line is not tramped or pressed by heavy objects and to avoid lengthening electric lines or overloading outlets to prevent fire or electric shock.
- Ventilation Maintenance: Maintaining clear ventilation grooves is essential to prevent overheating. Users should ensure the unit is placed in a well-ventilated area, free from obstructions or coverings.
- Prevention of Electric Shock: Strict warnings are given against dropping objects or liquids into the machine, especially metal objects, to prevent electric shock. This is particularly important in households with children.
- Professional Repair: The manual explicitly states that users should NOT perform any repairing work beyond what is stipulated in the instructions. Any complex repairs should be entrusted to recognized repairing workers. This includes issues like damage to the power supply line, liquid ingress, rain exposure, unusual operation, physical damage (dropping the machine, damaged casing), or noticeable changes in function.
- Unusual Smell/Smoke: In case of unusual smell or smoke, users are instructed to immediately cut off the power supply and unplug the unit from the wall outlet, indicating a critical safety and maintenance procedure.
- Connection Checks: Many troubleshooting steps involve checking the firmness and correctness of various cable connections (power cord, output cords, speaker cords), which are routine maintenance checks users can perform.
- Battery Replacement: For remote control issues, replacing weak batteries is a simple maintenance task users can perform.
In summary, the AKIRA HTS-292-998 is a robust home theatre system designed for a quality audio experience, with a strong emphasis on user safety and straightforward troubleshooting, while recommending professional intervention for complex repairs.
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