NAD C 542 service manual Important Notes, Instruction for Handling Optical System Block PICK-UP

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IMPORTANT NOTES

INSTRUCTION FOR HANDLING OPTICAL SYSTEM BLOCK PICK-UP

Electrostatic breakdown of the laser diode in the optical system block may occur due to a potential difference caused by electrostatic charge accumulated on clothing, human body, etc. A ground must be provided as follows to prevent any electrostatic charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a ground band (1M ohm) that is properly to remove any static electricity that may be charged on the body.

2. Ground for Work Bench

Be sure to place a conductive sheet (1M ohm) or copper plate with proper grounding on the work bench or other sur- face on which the pick-up is to be placed.

3.Because the static electricity charge on the clothing does not discharge through the body grounding band, do not let clothing to get in contact with the pick-up unit.

INCORRECT

 

CORRECT

1.Grounding band

1M ohm

1M ohm

2.Conductive Sheet or Copper Plate

NOTE: Laser diodes are so susceptible to damage from static electricity that even if a static discharge does not ruin the diode, it can shorten its life or cause it to work improperly.

PRECAUTIONS FOR CHECKING BEAM EMISSION

The laser beam of this unit is focused on the reflecting surface of the objective lens in the optical system block. Therefore, keep your eyes at least 12 inches (30 cm) away from the objective lens when the laser diode is ON. (Operation Check Method for Laser Diode and Focus Search Function.)

When the POWER switch is turned ON after the chucking plate is removed, observe the objective lens and confirm that the following operations are performed properly.

(The optical system should be at the lead-in area position when it is checked at this time.)

(1)The laser should be at the innermost position after the chucking plate is removed.

(2)The diffused light of the laser beam can be seen when the POWER switch is turned ON.

(3)Vertical (up and down) movement of the objective lens (2 or 3 times) will take place.

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Contents 542 Safety Information Class Laser ProductService Safety Precautions ContentsPhysical Specifications SpecificationsControls Rear Panel Rear Panel / Front PanelFront Panel Disassembly Instructions Refer to Figure No.1Block Diagram KeyboardWiring Diagram RF Pattern Testing NAD C 542 PCB Testing Points Diagram Testing ProcedureImportant Notes Precautions for Checking Beam EmissionInstruction for Handling Optical System Block PICK-UP Precautions When Changing Laser PICK-UP PCB Layout Display Board KEY Board Live Board LED BoardMain Board Schematic Diagram MCUDisplay GND1RF AMP DAC AgndOWE R U202 BA6392FP IC Block DiagramU101 CXA2581N U403 TC74HC00APU201 CXD3017Q U301 M38B57MC P64/INT4/SBUSY1/AN10Main Board U402 Nadlink Masked U302 PCM1732U501, U506, U507 Troubleshooting Guide Oscillating ? M101 SWITCH, DefectiveElectrical Parts List Reference No DescriptionLED CapacitorWAFER/CONNECTOR CoilScrew JackCrystal RelayDiode Diode 1N4148 ATTransistor HeatsinkMechanism Exploded View WSL-2130CCMMechanism Exploded View Parts List QtyExploded View Exploded View Parts List Screw M3X6 Packing Diagram Description ’TYNAD
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C 542 specifications

The NAD C 542 is a high-quality CD player that epitomizes NAD's commitment to delivering superior audio performance through innovative design and advanced technology. Designed for audiophiles and music enthusiasts alike, the C 542 stands out with its meticulous attention to detail, providing a rich listening experience that brings out the best in your CD collections.

One of the main features of the NAD C 542 is its high-performance digital-to-analog converter (DAC). The unit employs state-of-the-art circuitry that ensures accurate signal conversion, resulting in a dynamic range that captures the nuances of music more effectively. This allows listeners to experience depth and clarity in their audio that other CD players may not deliver.

The C 542 also incorporates NAD's proprietary technology known as "NAD's proprietary disc reading system." This feature enhances the player’s ability to read discs with precision, reducing errors that can arise from scratches or dirt. The result is more reliable playback and a seamless listening experience, even with older CDs that may have seen better days.

Another notable characteristic of the NAD C 542 is its ability to handle various disc formats. In addition to standard audio CDs, the player is compatible with CD-R and CD-RW formats, giving users the flexibility to enjoy their custom mixes. The C 542 also supports MP3 playback, allowing users to enjoy their digital music collections directly from discs.

The front panel of the C 542 is thoughtfully arranged for ease of use, featuring a bright display that provides essential information about track number, elapsed time, and disc status. Users can easily navigate through their tracks with a responsive remote control, which enhances usability and makes listening more enjoyable.

In terms of build quality, the NAD C 542 boasts a solid construction, which minimizes vibrations that can affect sound quality. This attention to detail in the physical design reinforces NAD's philosophy of creating products that perform exceptionally well while remaining durable over time.

In summary, the NAD C 542 is an exceptional CD player that combines advanced technologies, user-friendly features, and robust build quality. With its impressive DAC, proprietary reading system, and compatibility with multiple disc formats, it caters to the needs of discerning listeners who demand high fidelity and reliability in their audio equipment. Whether you are revisiting classic albums or enjoying modern recordings, the C 542 truly enhances your listening experience.