NAD C 368 Manuale utente

Hybrid Digital DAC Amplifier

Hybrid Digital DAC Amplifier SERVICE MANUAL

C 368

SPECIFICATION

C368 WIRING DIAGRAM

Signal

Power

control

Main MCU

NAD C368 BLOCK DIAGRAM

SI9573

HDMI Transceiver

MCU

TM4C1230H6PM

DC/DC AND LDO

3.3V 5.0V 1.3V

HDMI IN 3

HDMI IN 2

HDMI IN 1

HDMI OUT

IIS switcher

NC7SV157X3

46 pin board-board socket

IIS3

INT0

IIC

GPIO 0-4

SPI

12V EN

LDO

46 pin board-board socket

IIS4

INT1

IIC

GPIO 5-9

SPI

A12V EN

IIS BUFFER

NC7SV157

ch 0

ch 1

HDMI card

SPI

IIC

GPIO 0-11

INT 0-1

ESD

DIODE

E-GPO

DIGITAL DIGITAL

LDO

12.5V

IIS Main3

+13.8V

3.3VD

12.5V

POWER SWITCH

6.3AT/250V

SMPS

LOGIC BUFFER

TRIG OUT

TRIG IN

IR IN

GPIO

IR ; TRIG

Lowleakage SMPS

GPIO

SPI_FPP

CS8416

Plug in detect

Front panel

TFT DISPLAY

STANDBY

VOLUME

LED

BlueOS card

SPDIF

ANTENNA

MINI USB

Ethernet

USB HUB

Applications

Processors

MCIMX535

USB2514

Hub Controller

74LVC257A

LAN8720

BTM511

NC7SV157

74LV244

ATSAM3N00A

MM IN

PHONO AMP

LINE IN1

OPAMP

CLC2059

mute LINE1/SUB1

OPAMP

CLC2059

HD AMP

mute

Tact switch

Headphone

SOURCE

Tact switchTact switch

RS232

COAX 1

COAX 2

OPTO1

OPTO2

SPDIF IN

IR OUT

Asynchronous

SRC

SRC4382

NC7SV157

Audio serial

Port A

Audio serial

Port B

Digital interface

Receiver

SRC

CLOCK

24.576M

DAC MODULE

PCM1795

NJW1194

Volume

Digital Volume

TONE Control

AMP

LP1&2

LN1&2

RP1&2

RN1&2

SPEAKER A

2X80W 8ohm

Clipping

OPA1654

Clipping Control

OPA1654

+/-VCC

Current sense

EXT_VDR

3V3D

IIC

IIS Main2

IIS

L&R

LME49725

GPIO

SPI

I2C

GPIO

USB

+7.5VA

3V3D

1V8D

+/-7.5VA

DAC

MODULATOR FILTER

MCLK

OPAMP

LOW PASS filter

SPEAKER B L CHR CH

L CH

R CH

+12VR

+12V

mute

OPAMP

LOW PASS filter

LINE2/SUB2

CLC2059

3.3VS

MCU

STM32F030RCT6TR

LCD driver

+/-VCC

VAUX+/-

LDO

KA78R12

DC/DC

TPS54327

LDO

3V3D1V8D

Digital supply

+13.8V

TLV1117

5VD

3.3VSLDO

LM317

/LM337+/-7.5VA

TI TM4C1290

SPI_FPP

LCD driver

+13.8V

TLV1117

IIC

DC/DC

TPS54040

3V3S

control

OPAMP

HI PASS

CLC2059

OPAMP

HI PASS

CLC2059

+12V

AC_DET

GPIO

CONTROLLER

STBY

EXT_VDR

UCD102MP

+/-12V

Amber/Blue/Red

Analog supply

+/-12V

Enable

Detector

Bluetooth module

8670

IIS

3V3S

CLC2059

VAUX+

-12V

LDO

LM337

+12V

13V8 +12VR

GPIO

5VA

3V3D

+/-12V+/-12V

7WV17

IIS BUFFER

NC7SV157

3V3D

GPIO

Type A

USB

USB SWITCH

TS3USB3000

GPIO

TS3USB3000

USB

3V3D

+/-12V

LDO

TLV1117

3V3L

DC/DC

XRP7675

5VS

FRONT USB SUPPLY

BT_L/R IN

+/-12V

Analog SENSE

3V3S

GPIO

FAULT_DET

TRANS_TEMP

VAUX-

+13.8V

LINE IN2

CLOCK

Digital SENSE

3V3S

GPIO

CS8416

OPA2348

NE5532

SN74LVC1G123

GPIO

CLK Detctor

VM1.0

Bridge control

C368 BLOCK DIAGRAM

YES

Check STB board

Check main board

13.8V RIGHT?

NONO

Frontpanel Standbyled

No Power or Power shuts off

immediately

3V3S RIGHT?

NO Check U456

YES

Check Q703 Q706 circuit

Change FPP board,MDC board

YES

Press Standby button switch

standby led blue light?

YES

change PSU board

Check LEDBright Control signal

YES

standby led turn off?

standby led red light?

YES

red light

YES Check Q702 Q706 circuit

Change FPP board,MDC board

Check LEDBright Control signal

Check Q701Q706 circuit

Change UCD102 MODULE

Finish

Apply 1khz sinewave to RCA input of DUT

Amplifier output correct?

YES

NO IPRC IPRH signal correct?

YES

Change UCD102 MODULE

check+/-15V,+/-7.5VRight?

NO checkU461 U463 U464 U465 Circuit

NO change MAIN board

YES

checkU103 U104 U110 Circuit

change MAIN board

C368 Trouble shooting

C368 & C388 PHONE BOARD

C368 & C388 MDC INTERNAL BOARD

C368 & C388 MDC BOARD

C368 & C388 AUDIO SENSE BOARD

C368 & C388 AUDIO SENSE INTERNAL BOARD

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