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Cambridge Audio Azur 840C - Service Manual

Cambridge Audio Azur 840C
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Gallery Court Hankey Place London SE1 4BB UK
Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233
840C
Issue Date: 07
th
February 2007
SERVICE MANUAL
SPECIFICATIONS:
D/A Converters Dual Analog Devices Total correlated jitter <130pS
AD1955 24 bit DAC’s
Crosstalk @1kHz <-130dB
Digital Filter Analog Devices Black Fin Crosstalk @20kHz <-114dB
ADSP-BF532 32 bit DSP
Performing ATF™ Output impedance <50 ohms
Up sampling to 24 bit 384 kHz
Digital input word
widths supported 16-24 bit
Analog Filter 2 Pole Fully Differential
Linear Phase Bessel Filter Digital output word
widths supported 16, 20, 24 bit
Frequency Response 20Hz – 20kHz (+\-0.1dB) Digital input sampling 32kHz, 44.1kHz,48kHz,88.2kHz
frequencies supported 96kHz, 176.4kHz, 192kHz
THD @ 1 KHz 0dBFs <0.0005%
Digital output sampling 32 kHz – 192 kHz pass through
frequencies supported (including 44.1 kHz for CD)
48 kHz, 96 kHz, 192 kHz up sampled
THD @ 1Khz -10dBFs <0.0004%
Audio output up sampling Fixed 24 bit, 384kHz
THD @ 20 KHz 0dBFs <0.0007%
Dimensions (H x W x D) 115 x 430 x 360 mm
(4.5 x 16.9 x 14.7”)
IMD (19/20 kHz) 0dBFs <0.0002%
Weight 8.5kg (18.7lbs)
Linearity @ -90dBFs +/- 0.5dB
Stopband Rejection > 120dB
(>24 kHz)
S to N ration, A weighted >113dB
AP21184/1
1

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Summary

Product Specifications

Audio Performance Metrics

Key audio performance parameters like THD, IMD, S/N ratio, and jitter.

Converter and Filter Details

Information on DAC, digital filter, and analog filter technologies.

Interface and Physical Characteristics

Supported sampling frequencies, word widths, dimensions, and weight.

Safety Precautions

General Safety Warnings

Important safety guidelines for handling and servicing the unit.

Laser Safety Precautions

Specific safety measures related to the laser component.

System Diagrams

Exploded Diagram and Parts List

Visual representation of components and their part numbers.

Functional Block Diagram

Overview of the device's internal functional blocks and connections.

Front Panel Circuitry

Front Panel Circuit Diagram

Electrical schematic of the front panel interface.

Front Panel Board Layouts

Top and bottom side layouts of the front panel circuit board.

Front Panel PCB BOM

Bill of Materials for the front panel PCB.

Servo PCB Schematics and Layouts

Servo PCB Schematics

Schematics for the DAC and servo control sections.

Servo Board Layouts

Top and bottom side layouts of the servo circuit board.

Servo PCB Assembly BOM

Bill of Materials for the servo PCB.

Voltage Selector Circuitry

Voltage Select Switch PCB Schematic

Schematic for the voltage selection switch.

Voltage Select Switch Board Layouts

Top and bottom side layouts of the voltage selector switch board.

Voltage Selector PCB Assembly BOM

Bill of Materials for the voltage selector PCB.

DAC DSP Circuit Diagrams

DAC DSP Circuit Diagram (ABus)

Schematic for the ABus interface of the DAC DSP.

DAC DSP Circuit Diagram (DSP)

Schematic for the main DSP section of the DAC board.

DAC DSP Filters Circuit Diagram

Schematic illustrating the filter circuits within the DAC DSP.

DAC DSP Flash and Supply Diagrams

Schematics for flash memory and power supply circuits.

DAC DSP Board Layouts and BOM

DAC DSP Board Layout (Top Side)

Top side layout of the DAC DSP circuit board.

DAC DSP Board Layout (Bottom Side)

Bottom side layout of the DAC DSP circuit board.

DAC PCB Assembly BOM

Bill of Materials for the DAC PCB.

Mains PCB Schematics and Layouts

Mains PCB Schematic

Electrical schematic of the mains power supply PCB.

Mains PCB Board Layouts

Top and bottom side layouts of the mains PCB.

Mains PCB BOM

Bill of Materials for the mains PCB.

Integrated Circuit (IC) Pin Layouts

IC Pin Layout Details

Pin configurations and functions for various integrated circuits.

IC Pin Layout Details

Continued pin configurations for integrated circuits.

IC Pin Layout Details

Continued pin configurations for integrated circuits.

Software Upgrade Instructions

Introduction and Equipment Required

Overview and necessary items for software upgrades.

Checking Software Version

Steps to verify the current firmware version of the unit.

PIC Software Upgrade Process

Detailed guide for updating the PIC microcontroller software.

DSP Software Upgrade Process

Detailed guide for updating the Digital Signal Processor software.

Software Upgrade Testing

Procedures to confirm successful software upgrades.

Summary

Product Specifications

Audio Performance Metrics

Key audio performance parameters like THD, IMD, S/N ratio, and jitter.

Converter and Filter Details

Information on DAC, digital filter, and analog filter technologies.

Interface and Physical Characteristics

Supported sampling frequencies, word widths, dimensions, and weight.

Safety Precautions

General Safety Warnings

Important safety guidelines for handling and servicing the unit.

Laser Safety Precautions

Specific safety measures related to the laser component.

System Diagrams

Exploded Diagram and Parts List

Visual representation of components and their part numbers.

Functional Block Diagram

Overview of the device's internal functional blocks and connections.

Front Panel Circuitry

Front Panel Circuit Diagram

Electrical schematic of the front panel interface.

Front Panel Board Layouts

Top and bottom side layouts of the front panel circuit board.

Front Panel PCB BOM

Bill of Materials for the front panel PCB.

Servo PCB Schematics and Layouts

Servo PCB Schematics

Schematics for the DAC and servo control sections.

Servo Board Layouts

Top and bottom side layouts of the servo circuit board.

Servo PCB Assembly BOM

Bill of Materials for the servo PCB.

Voltage Selector Circuitry

Voltage Select Switch PCB Schematic

Schematic for the voltage selection switch.

Voltage Select Switch Board Layouts

Top and bottom side layouts of the voltage selector switch board.

Voltage Selector PCB Assembly BOM

Bill of Materials for the voltage selector PCB.

DAC DSP Circuit Diagrams

DAC DSP Circuit Diagram (ABus)

Schematic for the ABus interface of the DAC DSP.

DAC DSP Circuit Diagram (DSP)

Schematic for the main DSP section of the DAC board.

DAC DSP Filters Circuit Diagram

Schematic illustrating the filter circuits within the DAC DSP.

DAC DSP Flash and Supply Diagrams

Schematics for flash memory and power supply circuits.

DAC DSP Board Layouts and BOM

DAC DSP Board Layout (Top Side)

Top side layout of the DAC DSP circuit board.

DAC DSP Board Layout (Bottom Side)

Bottom side layout of the DAC DSP circuit board.

DAC PCB Assembly BOM

Bill of Materials for the DAC PCB.

Mains PCB Schematics and Layouts

Mains PCB Schematic

Electrical schematic of the mains power supply PCB.

Mains PCB Board Layouts

Top and bottom side layouts of the mains PCB.

Mains PCB BOM

Bill of Materials for the mains PCB.

Integrated Circuit (IC) Pin Layouts

IC Pin Layout Details

Pin configurations and functions for various integrated circuits.

IC Pin Layout Details

Continued pin configurations for integrated circuits.

IC Pin Layout Details

Continued pin configurations for integrated circuits.

Software Upgrade Instructions

Introduction and Equipment Required

Overview and necessary items for software upgrades.

Checking Software Version

Steps to verify the current firmware version of the unit.

PIC Software Upgrade Process

Detailed guide for updating the PIC microcontroller software.

DSP Software Upgrade Process

Detailed guide for updating the Digital Signal Processor software.

Software Upgrade Testing

Procedures to confirm successful software upgrades.

Cambridge Audio Azur 840C Specifications

General IconGeneral
BrandCambridge Audio
ModelAzur 840C
CategoryCD Player
LanguageEnglish

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