Cambridge Audio Azur 840C Manuale utente

Gallery Court Hankey Place London SE1 4BB UK

Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233

840C

Issue Date: 07th 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

840C SERVICE MANUAL

TABLE OF CONTENTS

Safety Precautions & Important Notes 3

Laser Safety Precautions 4

Exploded Diagram 5

Exploded Diagram Parts List 6

Functional Block Diagram 7

Front Panel Circuit Diagram 8

Front Panel PCB Layout (Top Side) 9

Front Panel PCB Layout (Bottom Side) 10

Front Panel PCB BOM 11

Servo Circuit Diagram (DAC) 12

Servo Circuit Diagram (Servo) 13

Servo PCB Layout (Top Side) 14

Servo PCB Layout (Bottom Side) 15

Servo PCB BOM 16-17

Voltage Select Switch Circuit Diagram 18

Voltage Select Switch PCB Layout (Top Side) 19

Voltage Select Switch PCB Layout (Bottom Side) 20

Voltage Select Switch PCB BOM 21

DAC DSP Circuit Diagram (Abus) 22

DAC Test Signals (Main Signal Paths General) 23

DAC DSP Circuit Diagram (DSP) 24

DAC Test Signals (Main Signal Paths General) 25

DAC DSP Circuit Diagram (Filters) 26

DAC Test Signals (Main Signal Paths Left Channel) 27-28

DAC Test Signals (Main Signal Paths Right Channel) 29-30

DAC DSP Circuit Diagram (Supply) 31

DAC DSP Circuit Diagram (Flash) 32

DAC DSP Board Layout (Top Side) 33

DAC DSP Board Layout (Bottom Side) 34

DAC DSP PCB BOM 35-37

Mains PCB Circuit Diagram 38

Mains PCB Board Layout (Top Side) 39

Mains PCB Board Layout (Bottom Side) 40

Mains PCB BOM 41

IC Pin Layout Details 42-50

Circuit Description 51

Software Instructions 52-61 2

SAFETY PRECAUTIONS & IMPORTANT NOTES

1. Check that the rear of the product indicates the correct supply voltage for

your area.

2. The lighting flash with the arrowhead within an equilateral

triangle is intended to alert the user or service agent to the

presence of dangerous voltages within the product enclosure that

may be of sufficient magnitude to constitute a risk of electric shock

to persons.

3. The exclamation point within an equilateral triangle is intended

to alert the user or service agent to the presence of important

operating and maintenance (Servicing) instructions in the literature

accompanying the appliance.

4. This product complies with EEC Low Voltage (73/23/EEC) and

Electromagnetic Compatibility (89/336/EEC) Directives when used and serviced

in accordance with this manual. For continued compliance all components

marked safety and EMC critical must only be replaced by Cambridge Audio

approved parts.

5. Any unauthorised design alterations or additions will void the manufacturer’s

warranty; furthermore the manufacturer cannot accept responsibility for personal

injury or property damage resulting therefrom.

6. When servicing, care should be taken to observe the original routing and

dressing of the leads and it should be confirmed that they have been returned to

normal after re-assembly.

Notes on chip component replacement

Never reuse a component that has been removed from a PCB

Notice that the minus side of a tantalum capacitor may be damaged by heat

Cambridge Audio and Azur are registered trademarks for Audio Partnership PLC. This document

may not be reproduced, distributed, transmitted, displayed, published, or broadcast without the

express written prior permission of Audio Partnership PLC.

Alteration or removal of any trademark, copyright, or other notice from this content is prohibited.

Information provided in this document is provided solely for the use of official service agents in

repairing and servicing Audio Partnership PLC products.

LASER SAFETY PRECAUTIONS

Caution: These labels may be attached to the unit on the rear and inside to

inform that it contains a laser component. Use of controls or adjustments, or

performance of procedures other than those specified within the service or

instruction manual may result in hazardous radiation exposure.

WARNING!

1. Service should only be performed by qualified personnel.

2. This equipment has been designed and manufactured to meet

international safety standards; it is the legal responsibility of the repairer to

ensure that these safety standards are maintained.

3. Any repairs must be made in accordance with the relevant safety

standards.

4. It is essential that safety and EMC critical components are replaced with

Cambridge Azur approved parts only.

CLASS 1 LASER PRODUCT

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the

potential difference generated by the charged electrostatic load, etc. on clothing and the human

body.

During repair, pay attention to electrostatic breakdown and also use the procedure in the printed

matter which is included in the repair parts.

The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concerated so as to be focused on the disc reflective surface by

the objective lens in the optical pick-up block. Therefore, when checking the laser diode

emission, observe from more than 30cm away from the objective lens.

Cambridge Audio Azur 840C CD Player

Exploded Diagram

To enhance viewing, please print to A3 5

Cambridge Audio Azur 840C CD Player

Exploded Diagram Parts List

noitpircseDec

efeRyrotc

PA.f

Rgn

war

1 PY1228 7003-008010E006 Screw M3*8 M/C 1/K Torx Recess ZN-PT (Silver)

1 PY1229 7003-008010E001 Screw M3*8 M/C 1/K Torx Recess BLK-PT (Black)

2 PY1218 6574-010003E000-01 Azur 840C Top Panel (Black)

2 PY1219 6574-010003E000-02 Azur 840C Top Panel (Silver)

3 PY1127 6574-150013E000-01 Azur 840A Side Panel, (Black)

3 PY1128 6574-150013E000A01 Azur 840A Side Panel, Silver

4 PY1110 4006-840058E001 840C DAC Module

5 PY1217 3200-080551E000 Transformer AC115/230V T08055A<AP19141/4>Azur-840C

6 PY940 9692-006002-201 Azur V2 CD Mechan assy with Sanyo DA11V Rev A

Not Shown PY941 3009-110000-002 V2 CD Sanyo Laser DA11V

7 PY1220 8584-001010E301 Azur 840C UK/EU Black Front Panel Assy

7 PY1221 8584-001000E301 Azur 840C UK/EU Silver Front Panel Assy

8 PY1222 4006-840001E000 Azur 840C Display Module MBCF00003B00V0 <RCL>

9 PY1223 6574-010002E000-01 Azur 840C Front Panel -B Artwork (Print Cool Grey 7C) Black

9 PY1224 6574-010002E000A01 Azur 840C Front Panel-S Artwork (Print Coll Grey 8C) Silver

10 PY1225 9484-001000E041 Azur-840C Control PCB Assy Rev A

11 PY1226 9484-001000E181 Azur-840C Servo PCBA <T-TYPE> Rev A

12 PY554 6564-010006-000-01 Azur 640C.B CD Door W/Silkscreen PMS Cool Grey 7C

12 PY568 6564-010006-000A01 Azur 640C.S CD Door W/Silkscreen PMS Cool Grey 7C

13 PY1122 6074-150004E000 Azur 840A Plastic Foot (Black) AP16837*

13 PY1124 6074-150004E000A01 Azur 840A Plastic Foot (Silver) AP16837*

14 PY1165 9805-084000E001 Azur 840A/C Remote Control Assy Rev A

Not Shown PY1227 5100-840100E100 Azur 840C Multilingual User Manual (AP18655*)

Exploded Drawing Parts List

Cambridge Audio Azur 840C CD Player

Functional Block Diagram

DSP

DC SERVO CIRCUITCURRENT SOURCE

CIRCUIT

ITOV

ITOV DIFFERENTIAL FILTER/AMP

DIFFERENTIAL TO SINGLE ENDED

UNBALANCED O/P

BALANCED O/P

DAC

WDCLK

BITCLK

SDATA L

RESET

MUTE

DAC CONTROL I/F

DAC1 MCLK

24.576 MHz

CLOCK + BUFFER

SPDIF TX CLK

SPDIF RX MCLK

DAC2 MCLK

DAC1 MCLK

DSP CLK

WDCLK

BITCLK

SDATA L

SPDIF RX SET UP I/F

WDCLK

BITCLK

SDATA L

(SPDIF SUBCODE DATA)

SPDIF TX SET UP I/F

AUDIO DATA LEFT

FLASH MEMORY

SPDIF RECEIVER

TRANSMITTER

AUDIO DATA L&R

SPDIF

FLASH ADDRESS & DATA

SPDIF TO LOGIC

LEVEL

SPDIF TO LOGIC

LEVEL

SPDIF I/P 1

SPDIF I/P 2

SPDIF I/P SWITCHING

OPTICAL

COAX

OPTICAL

LOGIC TO SPDIF

LEVEL

SPDIF O/P

COAX

OPTICAL

44.1 kHz PASS THRO' SETTING

44.1/48/96/192 kHz

44.1 kHz FROM CD SERVO

PASS THRO' SETTING

48/96/192 kHz UP/DOWN SAMPLED

CD SERVO TO MECH CONNECTIONS

DC SERVO CIRCUIT

CURRENT SOURCE

CIRCUIT

ITOV

ITOV DIFFERENTIAL FILTER/AMP

DIFFERENTIAL TO SINGLE ENDED

UNBALANCED O/P

BALANCED O/P

DAC

WDCLK

BITCLK

SDATA L

RESET

MUTE

DAC SET UP I/F

DAC2 MCLK

DAC PCB

MECH AND SERVO PCB

VRES

SPDIF I/P SWITCHING

CD SERVO TO LCD CONNECTIONS

PSU

MICROCONTROLLER/DSP INTERFACE

MICRO TO LCD

(DOT MATRIX) MICROCONTROLER (PIC)

RS232

IR UNMOD

I/P

O/P

I/P IR MOD

DRAWER OPEN CLOSE CONNECTIONS

LCD

DRAWER SPEED

CONTROL

KEY COMMANDS TO SERVO (DIGITAL POT FOR RE S LADDER I/P)

DIGITAL POT

K1 K2 I/P

FRONT PANNEL BUTTONS

MICRO TO LCD

(DOT MATRIX)

FRONT PANEL IR MOD I/P IR MOD FROM REMOTE

SPDIF I/P SWITCHING CONTROL

DSP CLK

AUDIO DATA L&R

SPDIF TX CLK

SPDIF RX MCLK

RS232 (LOGIC LEVELS)

MODULATED IR

LEFT CH

RIGHT CH

RESET

UBIT

RESET

(SPDIF SUBCODE DATA)

CBIT

(SPDIF SUBCODE DATA)

UBIT

X1 U15

CN3

CN4

U10

CN5

U23

44.1 kHz FROM CD SERVO

FRONT PANEL PCB

U11

U12

U13

U19 U20

U32

U130

U131

U33

U34

U38

U37

U39

U40

U41

U52Q7Q9

CN12

CN13

CN14

U35

U50

U46U53 Q3 Q5

RELAY

MUTE CIRCUIT

AUDIO O/P

RL1 RL2 RL3 Q2 Q4 Q8

OEI (PIC MUTE)

5U4U

U28

U1 U2 U3 Q1

AUDIO DATA LEFT

To enhance viewing, please print to A3 7

Cambridge Audio Azur 840C CD Player

AP19135/4 Front Panel Circuit Diagram

CONTROL BUS

SPI DATA RX

SPI INT

SPI DATA TX

SPI CLK

SPI CS

SERIAL TX

SERIAL RX

OE1

SO1_U7

SO2_U7

SO1_U9

MUTE

1n 50V X7R

CN1

CONN-H7

POWER DETECT

RESET

GND

+5V

REMOTE

CN2

CONN-H8

CN3

CONN-H8

CN4

CONN-H7

+5V

OPT

GND

TSOP18 IR RECEIVER

100n

47R

SW1

Standby

SW2

SW6

Stop

SW3

Select

SW4

Open/Close

SW5

Play/Pause

SW7

Back Skip

SW8

Forward Skip

220R

LED

MCLR/VPP

RA0/AN0

RA1/AN1

RA2/AN2

RA3/AN3/VREF

RA4/T0CKI

RA5/AN4/SS

RE0/RD/AN5

RE1/WR/AN6

RB4

RB3/PGM

RB2

RB0/INT

VDD

VSS

RD7/PSP7

RD6/PSP6

RB1

RD5/PSP5

RD4/PSP4

RC7/RX/DT

RC5/SDO

RC4/SDI/SDA

RD3/PSP3

RD2/PSP2

RC6/TX/CK

VDD

VSS

OSC1/CLKIN

OSC2/CLKOUT

RCO/T1OSO/T1CKI

RC1/T1OSI/CCP2

RC2/CCP1

RC3/SCK/SCL

RD0/PSP0

RE2/CS/AN7

RD1/PSP1

RB5

RB6/PGC

RB7/PGD

PIC16F874A

+5V

56R

100nF

CRYSTAL

FREQ=20MHz

22pF

10U 16V

100R

100nF

10K

+5V

VssVdd

R/W

D0D1

D2D3

D4D5

D6D7

LED A

LED K

100nF

+5V

SERVO RESET

IR OUT

C10

100nF

+5V

LED

SERVO RESET

To Servo Board

LCD Connector 2

LCD Connector 1

From Servo Board (LCD)

+5V

220R

C11

10U 16V

RESET

+5V

LCD

C12

100nF

ON/OFF

BRIGHT

ON/OFF

BC337

R12

10K

BC337

R13

10K

BC337

R14

1K2

R15

10K

GND

SDA

SCL

VCC

DS1803

+5V_SERVO

CN6

JST 2MM S9B-PH-KS

CN7

JST 2MM S8B-PH-KS

R18

10K

R19

10K

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

SEG16

SEG17

SEG18

COM1

COM2

COM3

COM4

CN10

LCD 740C

COM1

COM2

COM3

COM4

COM2

COM3

COM4

+5V

R20

100R

R21

100R

R22

100R

R23

100R

R24

100R

R25

100R

R26

100R

R27

100R

R28

100R

R29

100R

R30

100R

R31

100R

R32

100R

CLK

SD TX

SD RX

INT

OSC1

OSC2

U7_SO1

U7_S02

U9_S01

SCL

SDA

SERIAL TX

SERIAL RX

SERVO RESET

RESET

OE1#

MUTE

IR OUT

IR IN

LED 3MM BLUE

C13

10U 16V

C14

100nF

PAD EMC M3

C15

1nF

C16

1nF

C17

1nF

R10

300R

R11

PRE MULTI 500R

MCLR

GP4

CLKIN

Vss

GP0

GP1

GP2

Vdd

PIC12C508

CN8

DATA

CN9

DATA

R33

680R

R34

680R

BZX79C5V1 500MW

MGND

+5V_SERVO

MGND

FIN

GND1

RIN

GND2

VCC

OUT2

COM

OUT1

BA6218

MGND

+8V

CN5

CONN-8HEAD DUAL BOT

1N4004

C18

10U 16V

C19

100nF

+8V

R35

100K

LED

PAD EMC M3

C20

1nF

C21

1nF

C22

100nF

TO DAC BOARD CN8 (SPI)

TO DAC BOARD CN9 (RS232/MUTE/SPDIF CNTRL)

FROM SERVO BOARD DRAWER OPEN/CLOSE (SPI)

TO MECH DRAWER OPEN/CLOSE (SPI)

100R

10OR

R16

R METAL 1/8W

4k7

1/8W Metal Film

R17

R METAL 1/8W

4k7

1/8W Metal Film

R36

R METAL 1/4W

220R

1/4W Metal Film

R37

R METAL 1/4W

220R

1/4W Metal Film

1N4004

To enhance viewing, please print to A3 8

Cambridge Audio Azur 840C CD Player

AP19135/3 Front Panel Board Layout (Top Side)

To enhance viewing, please print to A3 9

Cambridge Audio Azur 840C CD Player

AP19135/3 Front Panel Board Layout (Bottom Side)

To enhance viewing, please print to A3 10

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