NAD C 542 service manual Block Diagram, Keyboard

Page 7

+8V +5V

U501,U507

DIGITAL

POWER

D514-D517

RECTIFIER

DIODES

 

 

 

 

 

 

 

KEYBOARD

 

 

 

 

 

 

 

 

 

F1

F2

 

 

 

 

 

 

 

 

 

 

 

M501

 

 

 

 

 

 

 

 

 

 

 

 

VFL DISPLAY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RANDOM

 

 

 

 

 

 

 

 

 

 

 

K502

M110

M109

M105

M107

M108

 

 

 

 

 

 

-22V

RELAY

 

 

 

 

 

 

 

 

 

 

 

 

 

-12V

 

 

 

 

TIME

REPEAT

 

 

 

 

 

 

M314

 

D510-D511

 

 

 

 

 

 

 

 

TRIGGER

+12V

5V

 

M106

M104

M103

M101

M102

 

 

ZENER DIODES

 

 

 

SWITCH

 

U502-3,U506

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANALOGUE

 

 

 

 

Q312

 

 

 

 

 

 

 

 

 

 

 

POWER

D506-D508

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RECTIFIER

POWER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIODES

 

 

 

1

79 80

 

 

 

 

 

24

41

56

 

 

 

TRANSFORMER

 

 

 

 

 

 

 

D501-D504

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35

40

 

RECTIFIER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18 67

 

U301 M38B59EF

 

 

 

 

DIODES

 

 

 

 

 

 

 

 

 

 

 

 

 

M500

 

 

 

19 69

 

SYSTEM CONTROL CPU

 

 

 

 

 

 

 

 

32

 

 

 

 

 

 

 

 

 

 

 

& VFL DISPLAY DRIVER

 

 

 

 

 

 

 

 

 

 

59 70

 

 

 

 

 

 

 

 

 

 

 

65

 

63

 

 

 

 

23

 

 

K501

 

 

AC POWER I / P

 

60 80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RELAY

 

Q310

 

 

22

62

66

58

64

67

68

72

25

 

 

 

 

 

 

 

 

 

M319

RCA JACK

NAD LINK

NAD LINK

IN

OUT

M313

IR_IN

9

10

11

U403

74HC00 NAND GATE

812 13

9U402 15 NAD LINK

11MICRO-

CONTROLLER

8

BLOCK DIAGRAM

- 7 -

 

CD MECHANISM UNIT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOADING

 

 

 

 

 

 

 

 

 

 

 

MOTOR

 

 

 

 

 

 

 

 

 

 

 

DISCO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOADING MOTOR

 

 

 

 

 

LIMIT SWITCH

DISW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPINDLE

 

 

 

 

 

 

 

 

 

 

 

MOTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SLED

 

 

 

 

 

 

DISC

 

 

 

 

MOTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PU-IN

 

 

 

 

 

 

 

 

 

 

 

LIMIT SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PICK

 

 

 

 

Q101

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q103

 

25

12

15

RFAC

51

20

1

 

27

 

 

 

 

16

FE

59

 

 

 

 

 

 

 

 

 

 

U101

 

 

9

64

1

 

SETE

 

 

18

40

41

 

 

CX2581

 

 

 

 

 

61

63

2

RF AMP

28

RFDC

43

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

11

 

 

 

 

U201

66

 

 

 

 

LXD3017Q

 

 

 

 

 

 

26

27

 

4

SRDR

29

DSP

 

 

 

 

 

 

 

 

 

 

1

2

 

5

SFDR

28

 

 

 

 

 

 

 

 

 

 

 

9

FRDR

33

 

 

 

 

U202

 

 

 

 

 

10

FFDR

32

 

 

 

 

BA6392

 

 

 

 

 

 

 

 

 

 

 

20

TRDR

31

 

 

 

 

 

 

 

 

 

 

 

 

 

19

TFDR

30

 

 

 

12

13

 

 

 

 

 

 

 

SPDR

 

 

 

 

16 17

15

24

26

 

 

 

 

 

 

 

 

27

 

 

60

 

 

 

 

 

 

 

 

 

Q307

 

 

M113

 

 

 

 

 

 

REMOTE

 

 

 

 

 

 

SENSOR

 

 

M315

 

 

 

CD AUDIO

TRIGGER IN

 

 

 

 

 

 

O/P

 

 

 

 

 

 

 

Q401- Q403

 

 

L

M313

 

Q301-Q304

R

MUTE CIRCUIT

RCA

MUTE

 

 

 

 

JACK

 

 

 

 

 

27

 

 

U306

U305

 

 

 

L

 

 

1

3

U302

16

 

 

PCM1732

R

 

 

4

 

DAC

13

 

 

 

 

 

 

 

 

 

M316

 

 

 

 

 

 

 

 

 

 

OPT JACK

 

 

 

 

 

DIGITAL

 

 

 

 

 

OUTPUT

 

 

 

3

6

 

M303

 

 

 

 

 

 

 

EMC FILTER

 

 

 

 

U403

 

 

 

 

 

 

M318

 

 

74HC00

 

 

 

 

 

 

RCA JACK

 

NAND GATE

 

 

 

 

 

DIGITAL

 

 

 

 

 

L301

 

 

OUTPUT

 

 

 

 

 

 

 

 

2

4

 

 

DIGITAL COIL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Image 7
Contents 542 Class Laser Product Safety InformationContents Service Safety PrecautionsPhysical Specifications SpecificationsControls Rear Panel Rear Panel / Front PanelFront Panel Refer to Figure No.1 Disassembly InstructionsKeyboard Block DiagramWiring Diagram NAD C 542 PCB Testing Points Diagram Testing Procedure RF Pattern TestingImportant Notes Precautions for Checking Beam EmissionInstruction for Handling Optical System Block PICK-UP Precautions When Changing Laser PICK-UP Display Board KEY Board Live Board LED Board PCB LayoutMain Board MCU Schematic DiagramGND1 DisplayRF AMP Agnd DACOWE R U403 TC74HC00AP IC Block DiagramU101 CXA2581N U202 BA6392FPU201 CXD3017Q P64/INT4/SBUSY1/AN10 U301 M38B57MCMain Board U402 Nadlink Masked U302 PCM1732U501, U506, U507 Oscillating ? M101 SWITCH, Defective Troubleshooting GuideReference No Description Electrical Parts ListCapacitor LEDCoil WAFER/CONNECTORRelay JackCrystal ScrewDiode 1N4148 AT DiodeHeatsink TransistorWSL-2130CCM Mechanism Exploded ViewQty Mechanism Exploded View Parts ListExploded View Exploded View Parts List Screw M3X6 Description ’TY Packing DiagramNAD
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Manual 44 pages 20.25 Kb

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.