IC BLOCK DIAGRAM

MAIN BOARD

U101: CXA2581N

 

 

 

LD

PD

 

SW

 

 

 

 

 

E

F

 

 

 

 

D

C

B

A

 

 

 

 

 

 

 

 

 

 

 

 

1

2

 

12

 

 

 

 

 

11

10

 

 

 

 

9

8

7

6

 

 

 

 

 

 

 

 

 

Vcc

22

 

Vcc

APC

 

 

D

A

B C

VOFST

gm

gm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RW/ROM

 

 

 

 

 

 

 

 

 

 

 

 

 

ACAC SUM VCA

 

 

 

GND

 

 

 

 

 

 

 

 

 

VC

 

VC

 

 

 

 

 

 

VC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC_SUM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-

 

 

+

 

 

 

 

 

 

 

 

 

 

 

EQ_IN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VC

5

 

VC

 

 

(H/L) VC

-(Hi-OFFAPCZ) DVC

 

+

 

+

-

-

 

VOFST

RW/ROM

 

VOFST

+

-

 

RW/ROM

- +

 

 

 

43

RFG

 

 

 

 

 

 

 

 

 

RW/ROM

 

 

 

 

 

 

VC

DVC

 

 

 

 

 

BST

 

 

 

 

 

 

 

 

 

RFC

 

 

 

 

 

 

 

 

 

 

 

27 14

 

DVC + +

 

Vcc

 

RW/ROM -

DVC

 

 

RW/ROM

+

 

 

 

 

RW/ROM VC

DVC

 

 

VC

 

 

 

 

 

EQ

 

23242625

VFC

 

 

 

 

 

 

DVcc -18

 

 

 

 

 

 

 

 

EQ ON/OFF

 

 

DVC

 

VC

+

- +

 

 

 

- +

- +

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOFST

 

DVcc 21

 

RW/ROM

 

 

DVcc 17

 

DVcc

 

 

 

 

 

 

13

20

 

19

16

28

29

30

15

 

 

 

 

 

 

DVcc

 

 

 

 

CE

CEI

 

TE

 

 

 

TE BAL

 

 

FE

FEI

RFDCO

RFDCI

DC OFST

 

RFAC

 

 

 

 

MAIN BOARD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MAIN BOARD

 

 

 

 

 

 

 

U202: BA6392FP

 

 

 

 

 

 

 

 

 

 

 

 

U305, U306: OPA2134

 

 

 

 

 

CH1OUTF

1

 

 

 

 

 

 

 

 

 

28

GND

 

 

 

 

 

Out A

1

 

 

 

 

8

V+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CH1OUTR

2

 

 

 

F

 

 

 

 

 

27

CH4OUTF

 

 

 

 

 

-In A

2

A

 

B

 

7

OUT B

 

 

 

 

 

 

 

 

LEVEL

 

 

 

 

 

 

 

 

 

 

 

 

— +

+ —

 

 

 

 

 

RCIN1

3

 

 

 

 

 

 

SHIFT

 

26

CH4OUTR

 

 

 

 

+In A

3

 

 

 

 

6

_In B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REV

 

 

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CH1RIN

4

 

 

 

 

 

 

 

25

VBIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

190K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V-

4

 

 

 

 

 

 

 

 

CH1FIN

5

FWD FACE

 

 

 

 

- +

 

24

VSIN

 

 

 

 

 

 

 

 

 

 

5

+In B

 

 

 

 

 

 

 

 

 

100K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VREFIN

6

 

 

 

 

 

 

 

 

 

23

VBIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VREFOUT

7

 

 

 

+ -

 

 

 

 

22

VCC

 

 

 

 

MAIN BOARD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U403: TC74HC00AP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMAL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SHUTDOWN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CIRCUIT

 

 

 

 

 

 

 

 

 

 

A1

1

 

 

 

 

 

14

 

VCC

GND

8

 

 

 

 

 

 

 

 

 

21

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CH2FIN

9

FWD

 

 

 

 

 

 

 

FWD 20

CH3FIN

 

 

 

 

 

B1

2

 

 

 

 

 

13

 

B4

 

 

 

INTER

 

 

 

 

 

 

INTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CH2RIN

10

REV FACE

 

 

 

 

 

 

FACE REV

CH3RIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

 

 

R

 

19

 

 

 

 

 

Y1

3

 

 

 

 

 

12

 

A4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RCIN2

11

 

 

 

 

 

 

 

 

 

18

RCIN3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CH2OUTR

12

 

 

 

F

 

 

 

F

 

17

CH3OUTR

 

 

 

 

 

A2

4

 

 

 

 

 

11

 

Y4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CH2OUTF

13

 

 

 

 

DRIVE

 

 

 

 

16

CH3OUTF

 

 

 

 

 

B2

5

 

 

 

 

 

10

 

B3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

14

 

 

 

 

MUTE

 

 

 

 

15

MUTE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25K

25K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y2

6

 

 

 

 

 

9

 

A3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

7

 

 

 

 

 

8

 

Y3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- 19 -

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 19
Image 19
NAD C 542 service manual IC Block Diagram, U101 CXA2581N, U202 BA6392FP, U403 TC74HC00AP

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.