Cambridge Audio Azur 740C - Service Manual

Gallery Court Hankey Place London SE1 4BB UK
Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233
740C
Issue Date: 28
th
September 2007
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SERVICE MANUAL
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SPECIFICATIONS:
D/A converters Dual Wolfson
WM8740 24 bit DACs
Digital filter Analog Devices Black Fin
ADSP-BF532 32 bit DSP
Performing ATF™
Upsampling to 24 bit 384kHz
Analog filter 2 Pole Dual Differential Bessel
Double Virtual Earth Balanced
Frequency Response 20Hz to 20 kHz (+/-0.1dB)
THD @ 1kHz 0dBFs < 0.0008%
THD @ 1kHz -10dBFs < 0.0005%
THD @ 20kHz )dBFs < 0.001%
IMD (19/20kHz) 0dBFs < 0.0006%
Linearity @ -90dBFs >113dB
Total correlated jitter <130pS
Crosstalk @ 1kHz < -130dB
Crosstalk @ 20kHz < -110dB
Output impedance < 50 ohms
Digital input word widths supported 16 – 24 bit
Digital input word widths supported 16, 20, 24 bit
Digital input sampling frequencies supported 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz,
192kHz
Digital output sampling frequencies supported 32kHz – 192kHz pass through (including 44.1kHz for CD)
48kHz, 96kHz, 192kHz upsampled
Audio output upsampling Fixed 24 bit, 384kHz
Dimensions – H x W x D 115 x 430 x 315mm (4.5 x 16.9 x 12.4”)
Weight 6.4Kg (14.1Lbs)
AP22735/1
1
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Summary

Product Specifications

D;A Converters and Digital Filter

Details the DAC chip and digital signal processing capabilities.

Analog Filter and Frequency Response

Describes the analog output stage and audio bandwidth.

Distortion, Jitter, and Impedance

Specifies THD, IMD, jitter, and output impedance.

Digital Input;Output and Upsampling

Lists supported digital formats and upsampling features.

Physical Dimensions and Weight

Provides product size and mass information.

Safety and Compliance

Safety Precautions and Important Notes

Crucial warnings for safe operation and servicing.

Copyright Notice

Legal information regarding document usage.

Component Overview

Exploded Diagram

Visual guide to the internal component layout.

Exploded Diagram Parts List

Inventory of all parts shown in the exploded diagram.

Front Panel Assembly

Front Panel Circuit Diagram

Schematic of the front panel electronics.

Front Panel Board Layout (Top Side)

PCB layout for the front panel's top surface.

Front Panel Board Layout (Bottom Side)

PCB layout for the front panel's bottom surface.

Front Panel PCB Bill of Materials

Component list for the front panel circuit board.

Servo System Details

Servo Circuit Diagram

Schematic of the servo control system.

Servo Board Layout (Top Side)

Component placement on the servo board's top.

Servo Board Layout (Bottom Side)

Component placement on the servo board's bottom.

Servo PCB Assembly Bill of Materials

Component list for the servo circuit board.

DAC System Schematics

DAC Circuit Diagram (Supply & Connectors)

Power supply and interface schematics for the DAC section.

DAC Circuit Diagram (SPDIF - RS232)

Digital audio interface schematics.

DAC Circuit Diagram (Flash Connector & Mute)

Firmware interface and mute function schematics.

DAC Circuit Diagram (DSP)

Digital Signal Processor (DSP) schematic.

DAC Circuit Diagram (Analogue Stage)

Analog output stage schematics.

DAC Board Layouts

DAC Board Layout (Top Side)

Component placement on the DAC board's top surface.

DAC Board Layout (Bottom Side)

Component placement on the DAC board's bottom surface.

DAC PCB Assembly Bill of Materials

Component list for the DAC circuit board.

Mains Power Section

Mains Circuit Diagram

Schematic of the AC power input and control circuits.

Mains Board Layout (Top Side)

Component placement on the mains board's top.

Mains Board Layout (Bottom Side)

Component placement on the mains board's bottom.

Mains PCB Bill of Materials

Component list for the mains circuit board.

Integrated Circuit Pinout Details

TA2153 FN; TC9462 FG Pin Layout

Pin configurations for servo ICs TA2153FN and TC9462FG.

MCU TMP87 EP26 F-1 J15 Pin Layout

Pin configuration for the main microcontroller.

TA2092 N; 7808; 7805; C8050 D Pin Layout

Pin details for power drivers, regulators, and transistors.

9014 C; C8550; 9015 C Pin Layout

Pin details for various transistors.

TSOP1836; PIC16 F877 A-I;P Pin Layout

Pin details for IR receiver and microcontroller.

DS18030-050; PIC12 C508 A-I;P Pin Layout

Pin details for digital potentiometer and microcontroller.

BA6218; BC337; TSOP1836; OP4 N25 Pin Layout

Pin details for motor driver, transistor, IR receiver, optocoupler.

4011; APRX179 AT; 74 VHC14 Pin Layout

Pin details for logic gates.

74 VHC153; 74 HCT153 Pin Layout

Pin details for multiplexers.

74 VHC32; CS8416 CZ Pin Layout

Pin details for logic gates and S/PDIF receiver.

CS8406 CZ; ADSP-BF532 BSTZ400 Pin Layout

Pin details for S/PDIF transmitter and DSP.

7815; LM1117 T-3.3 Pin Layout

Pin details for voltage regulators.

Cambridge Audio Azur 740C Specifications

General

Brand	Cambridge Audio
Model	Azur 740C
Category	CD Player
Language	English