To engineers in charge of repair or inspection of our products.

Before repair or inspection, make sure to follow the instructions so that customers and Engineers in charge of repair or inspection can avoid suffering any risk or injury.

1. Use specified parts.

The system uses parts with special safety features against fire and voltage. Use only parts with equivalent characteristics when replacing them. The use of unspecified parts shall be regarded as remodeling for which we shall not be liable. The onus of product liability (PL) shall not be our responsibility in cases where an accident or failure is as a result of unspecified parts being used.

2. Place the parts and wiring back in their original positions after replacement or re-wiring. For proper circuit construction, use of insulation tubes, bonding, gaps to PCB, etc, is involved. The wiring connection and routing to the PWB are specially planned using clamps to keep away from heated and high voltage parts. Ensure that they are placed back in their original positions after repair or inspection. If extended damage is caused due to negligence during repair, the legal responsibility shall be with the repairing company.

3.Check for safety after repair. Check that the screws, parts and wires are put back securely in their original position after repair. Ensure for safety reasons there is no possibility of secondary ploblems around the repaired spots. If extended damage is caused due to negligence of repair, the legal responsibility shall be with the repairing company.

4.Caution in removal and making wiring connection to the parts for the automobile. Disconnect the battery terminal after turning the ignition key off. If wrong wiring connections are made with the battery connected, a short circuit and/or fire may occur. If extensive damage is caused due to negligence of repair, the legal responsibility shall be with the repairing company.

5.Cautions regarding chips.

Do not reuse removed chips even when no abnormality is observed in their appearance. Always replace them with new ones. (The chip parts include resistors, capacitors, diodes, transistors, etc). The negative pole of tantalum capacitors is highly susceptible to heat, so use special care when replacing them and check the operation afterwards.

6. Cautions in handling flexible PCB

Before working with a soldering iron, make sure that the iron tip temperature is around 270... Take care not to apply the iron tip repeatedly(more than three times) to the same patterns. Also take care not to apply the tip with force.

7.Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.

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Boss Audio Systems GT480 service manual
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GT480 specifications

The Boss Audio Systems GT480 is a versatile and powerful car amplifier designed to enhance your audio experience on the road. Boasting an impressive range of features, this amplifier is perfect for audiophiles and casual listeners alike who are looking to elevate their vehicle's sound system.

One of the standout characteristics of the GT480 is its maximum power output, providing up to 480 watts of peak power. This output makes it capable of driving multiple speakers with exceptional clarity and volume. The amplifier is rated at 4 channels, making it ideal for building a full-range audio system that can accommodate front and rear speakers while also allowing for subwoofer integration.

In terms of technology, the Boss GT480 employs a Mosfet power supply, which ensures efficient performance and reliability. The Mosfet technology helps to regulate the power supply, allowing for better sound quality and improved thermal stability. This results in a more consistent performance under varying operational conditions, reducing the risk of overheating and extending the lifespan of the amplifier.

The GT480 also features adjustable gain controls, which allow users to tailor the audio output to their preferred listening levels. With both high and low-level inputs available, it can be easily connected to different head units, making installation straightforward for both professionals and DIY enthusiasts. The amplifier is equipped with a variable high-pass and low-pass crossover system, ensuring that each speaker receives the appropriate frequencies for optimal performance.

Additionally, the GT480 includes advanced over-current protection and thermal overload protection features. These safeguards help prevent damage to the amplifier and speakers during peak performance, ensuring that your sound system remains safe and reliable.

The compact and sleek design of the GT480 allows for flexible installation options, fitting into various spaces within most vehicles. Its durable construction ensures it can withstand the rigors of automotive use while delivering consistent audio performance.

With its impressive array of features, advanced technologies, and reliable performance, the Boss Audio Systems GT480 is an excellent choice for anyone looking to upgrade their car audio system. Whether you are listening to your favorite tunes during long drives or simply enjoying music on short trips, this amplifier promises to deliver an immersive auditory experience that is both powerful and enjoyable.
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