PRECAUTIONS: READ THIS BEFORE OPERATING YOUR UNIT

English

WARNING

To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture.

To avoid electrical shock, do not open the cabinet. Refer servicing to qualified personnel only.

CAUTION 1

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

CAUTION 2

As the laser beam used in this compact disc player is harmful to the eyes, do not attempt to disassemble the cabinet. Refer servicing to qualified personnel only.

 

This compact disc player is

CLASS 1 LASER PRODUCT

classified as a CLASS 1 LASER

product.

APPAREIL À LASER DE CLASSE 1

The CLASS 1 LASER PRODUCT

PRODUCTO LASER DE CLASE 1

label is located on the rear exterior.

 

(Europe and U.K. model only)

 

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

Laser Diode Properties

•Material: GaAlAs

•Wavelength: 780nm

•Emission Duration: continuous

•Laser Output: max. 44.6µW*

*This output is the value measured at a distance of about 200mm from the objective lens surface on the Optical Pick-up Block.

ACTIVE SERVO TECHNOLOGY

High-

 

amplitude

 

bass

Air woofer

sound

 

Cabinet

 

 

(Helmholtz resonator)

 

Port

 

Active Servo

Processing Signals

Amplifier

Negative-impedance

Signals of low amplitude output drive

The theory of the Active Servo Technology is based upon two major factors, the Helmholtz resonator and negative- impedance drive. Active Servo Processing speakers reproduce the bass frequencies through an “air woofer”, which is a small port or opening in the speaker’s cabinet. This opening is used instead of, and performs the functions of, a woofer in a conventionally designed speaker system. Thus, signals of low amplitude within the cabinet can, according to the Helmholtz resonance theory, be output from this opening as waves of great amplitude if the design is such that the size of the opening and the volume of the cabinet are in the correct proportion to satisfy a certain ratio.

In order to accomplish this, moreover, the amplitudes within the cabinet must be both precise and of sufficient power because these amplitudes must overcome the “load” presented by the air that exists within the cabinet.

Thus it is this problem that is resolved through the employment of a design in which the amplifier functions to supply the signals. If the electrical resistance of the voice coil is reduced to zero, the movement of the speaker unit would become linear with respect to signal voltage, and, to accomplish this, a special negative-impedance output-drive amplifier for subtracting output impedance of the amplifier is used.

By employing negative-impedance drive circuits, the amplifier is able to generate precise, low-amplitude low-frequency waves with superior damping characteristics, and these waves are then radiated from the cabinet opening as high- amplitude signals. The system can, therefore, by employing the negative-impedance output drive amplifier and a speaker cabinet with the Helmholtz resonator, reproduce an extremely wide range of frequencies with amazing sound quality and less distortion.

The features described above are combined to be the fundamental structure of the Active Servo Technology.

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