AUTOSOUND 2000 TROUBLESHOOTING TIPS

QUICK CHECK FOR TROUBLESHOOTING CAR AUDIO SYSTEMS

Preface:

All audio systems exhibit noise; however, if the level of noise is low enough, and the signal level high enough, noise should not be a problem. This means that it is very important that the signal level throughout the system be optimized BEFORE dealing with your noise problem. Using a scope (or a small portable amplifier) and Track 99 (1kHz at all high bits) of Autosound 2000’s CD #101, or tracks 24 through 29 of Autosound 200’s CD #102, adjust the system so that when the maximum usable signal level of the deck is fed into the system, all the preamp level components clip at the same time. However, we recommend up to as much as a 3:1 voltage overlap with the power amplifiers; i.e. an amplifier with a 2 volt mini- mum sensitivity can be driven by up to 6 volts of signal.

Noise Overview:

Car audio electrical accessories are notorious for interfering with car audio systems. The interference commonly arises from three areas:

1)Power line noise (5%), which can be attenuated with in-line noise filters,

2)Inadequate power supply isolation (45%), which can be cured with transformer signal coupling, additional isolated power supplies, or changing out components, or

3)Inductive interference (45%) - Including loop area inductive noise picked up by the signal cables - which can be remedied by relocating or rewiring components, rerouting signal cables, or using twisted cable or balanced transmission systems.

AUTOSOUND 2000 1-2-3 METHOD OF LOGICAL TROUBLESHOOTING

I.MUTE THE AMP(S). Insert a muting plug (shorted male RCA connector) into each amplifier channel. Turn up the amp sensitivity. Start the car and turn on the headlights, air conditioning, brake lights, etc. Listen for noise in each speaker. Be very picky here!

A.If still noisy, substitute a small test speaker with short leads for the speakers, crossovers, and speaker leads in the car. If still noisy, substitute an isolated power supply (120 VAC to 13.8 VDC bench supply or a small motorcycle battery) for the car’s alternator. If the amplifier is noisy with the test speaker, you have a BAD amp. Send it in. It really doesn’t matter if it is quiet or noisy while running on the isolated supply because you have a BAD amp. Send it in for repair and if it was quiet on the isolated supply, indicate so on the re pair tag.

page 52

Page 51 Page 53
Page 52
Image 52
Orion Car Audio 250R & 275R, HCCA 225R, HCCA 250R, HCCA 275R owner manual Quick Check for Troubleshooting CAR Audio Systems
Page 51 Page 53

250R & 275R, HCCA 225R, HCCA 250R, HCCA 275R specifications

Orion Car Audio has long been a prominent name in the realm of high-performance audio systems, and their HCCA series amplifiers - specifically the HCCA 225R, HCCA 250R, and HCCA 275R - exemplify the brand's commitment to delivering powerful and high-quality sound for automotive enthusiasts. These amplifiers are designed to provide exceptional audio experiences, incorporating advanced technologies and features that enhance performance while ensuring reliability.

The HCCA 225R is a compact yet robust amplifier that delivers an impressive output of 225 watts RMS at 4 ohms, making it ideal for smaller setups while still producing a significant level of power. With a sleek design and a fully adjustable gain control, this model allows users to fine-tune their audio settings to achieve the best sound quality. It also includes a low-pass crossover, which helps to eliminate unwanted frequencies and enhances bass response.

Meanwhile, the HCCA 250R offers a step up in power output, delivering 250 watts RMS at 4 ohms. This amplifier also features a heavy-duty aluminum chassis, ensuring durability and effective heat dissipation during extended use. The HCCA 250R raises the bar with its capability to work seamlessly with subwoofers, providing deep, resonant bass tones that can truly elevate the listening experience. The user-friendly interface includes high and low-level inputs, catering to various installation needs.

For those who demand even more power, the HCCA 275R stands as a formidable option, producing 275 watts RMS at 4 ohms. This model incorporates advanced circuitry designed to reduce distortion and improve sound clarity. The HCCA 275R is equipped with a built-in variable bass boost feature, allowing audiophiles to customize their bass response further, enabling a more personalized sound profile.

All three models are engineered with performance in mind, boasting high-efficiency heat sinks, low-noise operation, and robust power supplies that ensure stability, even under heavy loads. Additionally, the HCCA series amplifiers come with comprehensive protection circuitry to safeguard against short circuits, thermal overload, and DC output, providing peace of mind while delivering high-quality sound.

In summary, the Orion Car Audio HCCA 225R, HCCA 250R, and HCCA 275R amplifiers offer remarkable audio performance characterized by power, versatility, and durability. With their advanced features and robust build quality, they cater to the needs of audiophiles looking to enhance their car audio systems, all while ensuring an exceptional listening experience.
Top Page Image Contents