About the Optical Pickup, Troubleshooting

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ABOUT THE OPTICAL PICKUP

The Compact Disc player uses a solid-state semi-conductor diode laser, mounted on a tracking servo-mechanism, to play the disc. The laser illuminates the track of microscopic pits representing the digital data bits, while photo-diodes detect the reflected illumination from the disc and convert it into an electronic signal which is then decoded to recover the musical waveform in each stereo channel.

You cannot see the laser operating, because it operates at wavelength of 7800 Angstroms, which is in the infrared and thus invisible to the human eye.

The Compact Disc player is completely safe for children to use. The laser operates at very low power and is concealed within the player mechanism. Even when the player is disassembled, the laser remains sealed within an optical system that causes its light to focus only 1 millimeter from the lens and then diverge rapidly, reducing its intensity to negligible levels.

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TROUBLESHOOTING

SYMPTOM		POSSIBLE CAUSE		SOLUTION

No Power when the POWER button is set to ON	•	Poor or no power plug connection at the AC	• Insert the power plug firmly into the AC outlet.
		outlet

Disc play does not start	•	The disc is loaded upside down	• Reload the disc with the label side UP
	• The disc is too dirty		•	Clean the disc

No sound	•	Incorrect audio cable connections	• Connect the CD player to the amplifier/receiver
				correctly
	•	Incorrect amplifier/receiver operation	• Make sure that the input selector on your
				amplifier or receiver is set to CD

Sound skips	•	The CD player is subject to vibration or physical	• Change the installation location
		shock from external sources

Remote control does not work	•	Batteries in Remote Control handset have	•	Replace batteries
		expired
	• Object obscuring remote sensor		• Remove any objects directly in front of the player
		on the player

A “humming” sound can be heard	•	Loose cable connections	• Check the cable connections, particularly the
				phono connecting cables

C 521BEE specifications

The NAD C 521BEE is a compact disc player that has made a significant impact in the world of audio equipment, particularly due to its impressive performance-to-price ratio. Designed with audiophiles in mind, this player offers a remarkable listening experience, combining modern technology with classic design principles.

One of the standout features of the C 521BEE is its high-quality digital-to-analog converter (DAC). The player employs a 24-bit/96kHz resolution, ensuring that audio tracks are reproduced with exceptional clarity and precision. This level of resolution allows for a more nuanced representation of sound, significantly enhancing the listening experience. The DAC is further complemented by NAD's proprietary technology, which minimizes jitter and optimizes digital signal processing, resulting in smooth playback without unwanted distortions.

In addition to its advanced digital capabilities, the C 521BEE boasts a robust build quality. The chassis is constructed to minimize vibrations and external interference, allowing for clean signal transmission. The solid construction also contributes to the longevity of the player, making it a wise investment for discerning listeners.

Another key feature of the NAD C 521BEE is its user-friendly interface. The ergonomic remote control allows for easy navigation through tracks, playlists, and additional functions. The player supports a variety of disc formats, including CD-R and CD-RW, enabling users to enjoy their extensive music libraries without restrictions.

For those who wish to enhance their audio experience even further, the C 521BEE is equipped with a variable output level. This feature enables users to adjust the output to match their amplifier or receiver, ensuring optimal integration into any audio setup. Moreover, the player includes a digital output, allowing it to be connected to external DACs or digital sound processors for those seeking even greater flexibility and potential audio upgrades.

In summary, the NAD C 521BEE disc player encapsulates a fusion of advanced technology and strong engineering principles. With its superior DAC, robust construction, and user-friendly features, it caters precisely to the needs and expectations of audiophiles seeking high-quality sound reproduction in a compact, reliable package. Whether used as a standalone unit or part of a larger audio system, the C 521BEE stands as a testament to NAD’s commitment to delivering unparalleled audio performance.

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