NAD C 542 service manual Rf Amp

Page 16

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RF AMP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V3V6

L101

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C109

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TP103

 

 

 

 

 

 

 

 

VDD1

C108

 

 

 

 

100u/10V

 

10uH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RFDC

RFDC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L102

 

R101

C105

100u/10V

 

 

 

 

 

 

 

 

R109

15K

R119

15K

 

 

 

 

 

10uH

 

Q101

10

 

 

 

 

 

VDD1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U101

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

8550

100u/10V

 

 

 

 

 

 

 

R110

3K

R118

10K

 

 

 

M102

 

 

 

 

 

CXA2581

 

R105

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

16PIN

 

 

 

 

 

 

 

1

 

 

 

30

3K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LD

DC_OFST

 

 

R108

R111

4K7

R117

12K

 

TP104

 

 

1

 

 

 

 

 

 

2

29

 

 

 

 

 

VC

 

 

 

 

 

 

PD

 

RFDCI

 

 

C102

 

 

 

 

 

 

 

2

 

 

 

 

 

C101

3

 

28

 

 

68K

 

 

 

 

2

1/2X

 

VDD

 

 

 

 

 

EQ_IN

 

RFDCO

 

 

R112

5K1

R116

12K

1/2X

3

 

 

 

 

 

 

4

 

27

 

 

0.1u

 

 

 

E

 

 

 

 

 

 

AC_SUM

VC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

5

26

 

 

 

 

 

 

 

 

Q103

 

 

D

 

 

 

 

 

 

GND

 

RFC

 

 

 

 

 

 

R115

1K8

 

 

5

 

 

 

 

 

0.1u

6

 

25

 

 

 

 

 

 

8050

 

 

A

 

 

 

 

 

A

 

VFC

 

 

 

 

 

 

 

1

 

 

6

 

 

 

 

 

 

7

 

24

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

B

 

BST

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

8

 

23

 

 

 

 

 

 

C110

 

 

 

C

 

 

 

 

 

 

C

 

RFG

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

9

 

22

 

 

 

 

 

 

100u/10V

 

 

 

F

 

 

R103

20K

 

 

D

 

VCC

 

 

 

 

 

 

 

 

 

9

 

 

 

 

10

 

21

 

 

 

 

 

C103

 

 

 

 

 

GND

 

 

 

 

 

 

E

 

CEI

 

R106

 

 

 

 

TP105

 

 

10

 

 

 

 

 

 

11

 

20

 

 

 

 

0.1u

 

SE

 

LD

 

 

 

 

 

 

F

 

CE

 

150K

 

 

 

 

 

 

SE

11

 

VDD1

 

 

 

12

 

19

 

 

 

 

 

 

 

 

 

VR

 

20K

 

 

SW

 

TE_BAL

 

 

 

 

 

 

 

 

TP106

 

 

12

 

 

R104

 

 

13

 

18

 

 

 

 

 

 

 

 

TE

 

PD

 

 

 

 

 

 

DVCC

 

TE

 

 

 

 

 

 

 

 

 

TE

13

 

 

 

 

 

 

14

 

17

 

R107

 

 

 

 

 

 

 

 

FCS+

 

 

 

 

 

 

DVC

 

FEI

 

 

 

 

 

 

 

TP107 FE

 

14

 

 

 

C106

 

 

15

 

16

 

100K

 

 

 

 

 

 

FE

TRK+

15

 

 

100u/10V

 

 

 

RFAC

 

FE

 

 

 

 

 

R113

R114

 

 

TRK-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

 

C107

 

 

 

 

 

 

 

 

 

 

 

5K1

5K1

 

 

 

FCS-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TP108

 

 

 

 

100u/10V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TP101

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RFAC

RFAC

 

 

FCS-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FCS-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRK-

 

 

 

 

VC

 

 

 

 

 

 

 

 

 

 

 

 

RW/ROM/LDOFF

 

 

TRK-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RW/ROM/LDOFF

 

TRK+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRK+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TP109

 

 

 

 

FCS+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FCS+

 

 

 

 

 

 

 

 

 

 

 

R125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4R7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

3

 

R123

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R121

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M101

 

 

 

 

 

2

 

 

 

2

 

 

 

 

 

 

 

 

LOAD

 

LOAD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5PIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q104

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

TRAY-

 

 

 

 

 

 

 

 

Q105

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8550

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

TRAY+

 

 

 

 

 

 

 

 

8550

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q106B

1

 

1

 

 

 

 

 

 

 

 

 

 

 

 

3

DISCO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

2.2u/50V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

DI/SW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

1

 

 

 

 

 

 

 

 

 

 

 

 

DISCO

DISCO

 

 

 

R122

 

 

 

 

 

R124

 

NOTE:

1. RESISTORS, ARE CARBON FILM 5% 1/8W UNLESS

 

 

 

 

 

1K

2

Q106

Q107

2

1K

 

 

 

OTHERWISE SPECIFIED.

 

 

 

 

 

 

DI/SW

 

 

 

 

 

 

 

 

 

 

DI/SW

 

 

 

 

 

 

8050

8050

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. CERAMIC CAPACITORS, ARE 50V 10%. UNLESS

 

 

 

UNLD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNLD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OTHERWISE SPECIFIED.

 

 

 

 

 

 

 

 

 

 

 

3

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Image 16
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 IC Block Diagram U101 CXA2581NU202 BA6392FP 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 CoilJack CrystalScrew 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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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.