AP211841 Cambridge Azur 840C CD Player Service Manual Audio SM

User Manual: Azur 840C

Open the PDF directly: View PDF .
Page Count: 61

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 RES 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

AP19138/5

AP Part

No. Value Description Factory Part No Qty Component Ident Notes

47R 0.25 W 1% Metal Fil

1R1

56R 0.25 W 1% Metal Fil

2 R3, R4

100R 0.25 W 1% Metal Fil

16 R5, R7, R8, R20-R3

220R 0.25 W 1% Metal Fil

1012-201014E00

4 R2, R9, R36, R3

300R 0.25 W 1% Metal Fil

1 R10

680R 0.125 W 1% Metal Fil

1016-801016E02

2 R33, R34

1K2 0.25 W 1% Metal Fil

1 R14

4K7 0.25 W 1% Metal Fil

2 R16, R17

10k 0.25 W 1% Metal Fil

6 R6, R12, R13, R15,R18, R1

100K 0.25 W 1% Metal Fil

1 R35

PRE MULTI 500R Side adjust Footprint 9.5 x 4.5

VR B500 OHM +-

10% WI

3296NOXOX-XA1-

013

1 R11 Mount on bottom side of PCB with

screw adjust facing upwards

22p 6C,5C2mm0.5=hctiP,OPNcimareCF

12C,02C,71C-51C,2C,1C7mm0.5=hctiPV05cimareCFn1

9mm0.5=hctiPV05

cimareCFn001 C3, C4, C8-C10, C12, C14,

C19, C22

10uF Miniature 16V Pitch 2.5mm

Height 5.2mm 4 C7, C11, C13, C18

1U1REVIECERRIPOSTV3SS6381POST Mount 13.5mm height from PCB, Please

support using foam pad spacer

2U1CIPP/I-A778F61CIP Programme with AP20058/2, Please add

version label - See AP Service Dept.

PY983 DS18030-05

DIGITAL PO T 4118-030051E20

1U3

4U1CIPP/I-A805C21CIP Programme with AP20231/1, Please add

version label - See AP Service Dep

PY260 BA621

5U1CIREVIRDDC

PY214 BC33 7 NPN SMALL SIGNA L 4 Q1-Q4

1D1EULBDEL

5V1 ZENE R BZX79C5V1 1402-511201E20

2 D2, D3

7D,6D,5D,4D4REIFITCERESOPRUPLARENEG4004N1

PY043 TACT SWITCH TACT SW 2P2T KPT-1105A

(5MM) 8 SW1-SW8

MPP03-+1X1SU94-CHFP02LCMM5.3TUOBATHGIEH,zHM02LATSYRCzHM

MISCELLANEOUS

Cambridge Audio Azur 840C Front Panel PCB BOM

RESISTORS

CAPACITORS

SEMICONDUCTORS

TRANSISTORS

DIODES

Note: resistors, capacitors and other 'generic' electronic components are

not usually stocked by the manufacturer. Please obtain these locally.

Cambridge Audio Azur 840C CD Player

AP18432/3 CD Servo PCB Schematic (DAC)

SDATA

DEM/SCL

LRCK

MCLK

AOUTL

VA+

AGND

AOUTR

CS4333/38

C41

0.1uF

C40

10uF 25V

C39

10uF 25V

C32

10uF 25V

R75 15K

R82 15K R80 12K

R74 12K

C42

390pF

C38

390pF

U4:A

NJM2100

U4:B

NJM2100

R73 47K

C33

10pF

C34

10uF 25V

CN9

GND

R71

56K

C43

10uF 25V

R70

56K

C35

0.1uF

+5V

L.CH

R.CH

+8V

R81 47K

C36

10pF

R79 20K

R72 20K

C37

220uF 16V 1

CN10

GND

L.CH

R.CH

GND

CN13

DIG DATA

CN14

MCLK

R68

100R

R69

100R

RL1:B

RL1:A

8RL1:C

R83

120R 0.5W

R88

14.5V

8050

C55

47uF 16V

R89

330k

IN4148

R90

390R

IN4004

R87

100R

9012

R85

560R

R86

3K9

C63

4.7uF 16V

IN4004

CN11

GND

ROUT

LOUT

MUTE1

MUTE

R84

4K7

9012

C88

1nF

D12

1N4001

To enhance viewing, please print to A3 12

Cambridge Audio Azur 840C CD Player

AP18432/3 CD Servo PCB Schematic (Servo)

SEG14

SEG15

SEG16

SEG17

SEG18

FL/TL

VDD

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

COM3

COM2

COM1

COM0

VLC

VDD

100

VSS

(BOOT)

VAREF

AD K1

AD K2

AD K3

PWR DET

OLT

CLT

SLT

D-OPEN

D-CLOSE

BUS3

BUS2

BUS1

BUS0

BUCK

CEE

VSSS

XOUT

XIN

RESET

TEST

REMOTE

MUTE

SCK2

(SI2)

(SO2)

(WAIT)

CORW

RES

TOSHCDMCU

CN6

LCD

CN5

LCD

CN4

LCD

R22

R21

22K

+5V

C83

470uF 16V

C85

100uF 16V

+5V

+5VDD

C84

220uF 16V

Q13

9014C

CRYSTAL

7.3728MHz

C81

25pF

C80

25pF

C79

100nF

R19

3K3

R18

10K

1N4148

R20

CN3

PROGRAMMING

R65

10K

R66 2K2

R17 10K

+5V

R27

10K

+5V

+5VDD

XVSS

VDD4

PXO

PXI

VSS4

TESIO1

TESIN

DACT

CKSE

DMOUT

IO3

IO2

IO1

IO0

VSS3

VDD3

FLGD

FLGC

FLGB

FLGA

SEL

2VREF

DMO

TEBC2

TEBC1

TEBC0

RFGC

XVDD

DVSR

DVDD

DVR

DVSL

TEST1

TEST2

TEST3

BUS0

BUS1

BUS2

BUS3

VDD

VSS

BUCK

CCE

TEST4

TSMOD

RST

100

VREF

TRO

FOO

TEZI

TEI

TSIN

SBAD

FEI

RFRP

RFZI

RFCT

AVDD1

RFI

SLCO

AVSS1

VCOF

VCOREF

PVREF

LPFO

LPFN

TEST0

HSO

UHSO

EMPH

LRCK

VSS1

BCK

AOUT

DOUT

MBOV

IPF

SBOK

CLCK

VDD1

VSS2

DATA

SFSY

SBSY

SPCK

SPDA

COFS

MONIT

VDD2

TESIO0

P2VREF

HSSW

ZDET

PDO

TMAXS

TMAX

TC9462F

VCC

RFGC

GMAD

FNI

FPI

TNI

MDI

LDO

SEL

TEB

2VRO

TEN

TEO

SBAD

FEO

FEN

SEB

VRO

RFRP

BTC

RFCT

PKC

RFRPIN

RFGO

GVSW

AGCIN

RFO

GND

RFN2

TPI

TA2153FN

PW GND

OUT(-)1

PVCC1

OUT(+)1

VIN1

VRI

VCI

VIN2

OUT(+)2

PVCC2

OUT(-)2

PW GND

OUT(-)3

PVCC3

OUT(+)3

VIN3

SGND

SVCC

VIN4

OUT(+)4

PVCC4

OUT(-)4

PW GND

TA2092N

R15 10K

R39

10K

R14 10K

R13 10K

R12 10K

+5V

R11 10K

220K

R7 68K

R5 15K

R9 47K

0.015uF

C76

47pF

C74 47uF 16V

R8 10K

C75 0.01uF

C6 0.0027uF

CN1

DIGITAL OUT

+5V

R10 47R

C11

0.047uF

C10

47uF 16V

CN16

MECH

CN15

MOTOR DRIVE

+8V

C56

220uF 16V

C59 100nF

R64

10K

+5V

C58

100nF

C57

100nF

R42

3K3

C27 0.047uF

C26 0.047uF

R41

3K3

C60

0.047uF

C61

100nF

C14 22uF 16V

C28 47uF 16V

R38

R37

R40 10R 1/4W

R36

R35

CRYSTAL

16.9344MHz

C17 15pF

C16 15pF

C15

0.047uF

C19

0.047uF

C18 47uF 16V

R43

10K

R45

3K3

C24 470pF

C25 470pF

R44 3K3

C62

100nF

R60

R59

82K

47uH

C66

0.047uF

C65

220uF 16V

C20

47uF 16V

C67

100nF

C64 100nF

C68

22uF

R58 0R

R56 10K

R55 10K

R54 10K

R53 10K

R52 56K

R51 47K

R50 47K

R49 47K

R48 47K

R57 56K

10uH

9015

R62

15R

C69 100uF 16V

R46 3K3

R47 3K3

C23

0.047uF

C22 0.047uF

R63

100K

2K2

3pF

C73

100pF

10K

R4 220R

C2 100nF

C72 0.22uF

C3 0.22uF

C4 100nF

R61 27K

C71 100nF

0.01uF

0.047uF

C77

47uF 16V

C78

47uF 16V

C70

47uF 16V

1N4148

C13 0.047uF

C12 1uF 16V

C29 47uF 16V

R16

10K

CN8

DRAW DRIVE

R31

10K

R30

10K

+5V

Q12

8050

8550

Q10

8550

R33

470R

R34

470R

R67

14mm link(840c only)

+8V

R28

10K

R29

10K

+5V+5V

C86

100nF

100uH

R26 10K

R25 1K

R23 10K

R24 10K

R32

4K7

REMOTE

LK1

LINK

OPEN = F/L

SHORT = T/L

+5VCC

CN12

CN2

DATA OUT

EMPH

BCK

PCMD

LRCK

GND

CN17

XTALI

OSC

GND

SET LCD CONTRAST

+5V

RESET

BOOT

GND

WAIT

SCK2

SI2

SO2

REMOTE

+5V

GND

C21

0.0047uF

OLT

GND

CLT

OPEN

GND

ROUT

LOUT

MUTE1

MUTE

+5V

GND

D-OUT

FC-

TR-

TR+

FC+

GND

VCC

SLT-

SLT+

FM+

FM-

DM-

DM+

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

COM0

COM1

COM2

COM3

L4 100uH

100uH

C82

10uF 16V

CN18

XTALO

GND

C87

1nF

CN20

MUTE

CN7

CONTROLKEYS

D10

1N4148

D11

1N4148

R76

4K7

8050 Q11

8050

PWR DET

RESET

100R

FU1

T2AL

GND

7805

C45

100nF

C44

100nF C46

470uF 16V

+5V

CN19

AC IN

D5 IN4004 D4 IN4004

D2 IN4004 D3 IN4004

C49

100nF

C50

3300uF 25V

C54

100nF

GND

7808

C48

100nF

C53

100nF

C51

100nF

C52

100nF

C47

470uF 16V

+8V

14.5V

CN21

FP DIS

NO FIT FOR 740/840C

To enhance viewing, please print to A3 13

Cambridge Audio Azur 840C CD Player

AP12927/8 CD Servo Board Layout (Top Side)

To enhance viewing, please print to A3 14

Cambridge Audio Azur 840C CD Player

AP12927/8 CD Servo Board Layout (Bottom Side)

To enhance viewing, please print to A3 15

AP19969/3

AP Part

No Value Description Qty Component Ident Factory Part no Notes

000-410000-110104R1rotsiseRmliFlateMW52.0R01

15R 0.125 W Metal Film Resistor 1 R62

knilesU.YLNOC048roF76R1knilmm41knil

000-810007-4101,01

R1rotsiseRmliFlateMW521.0R74

100R 0.125 W Metal Film Resistor 1 wirelink ( J1 ) 1011-001016-000

wirelink is positioned

between C68 and L2. This

must be 100R resistor

000-810102-21014R1rotsiseRmliFlateMW521.0R022

000-610107-410143,33R2rot

siseRmliFlateMW521.0R074

1K 0.125 W Metal Film Resistor 5 R3, 20, 25, 60 1011-002018-000

000-610202-210166,1R2rotsiseRmliFlateMW521.02K2

3K3 0.125 W Metal Film Resistor 7 R19, 41, 42, 44, 45, 46, 47 1013-302018-000

000-610207-410167,23R2rotsis

eRmliFlateMW521.07K4

10K 0.125 W Metal Film Resistor 26

R2, 8, 11, 12, 13, 14, 15, 16, 17,

18, 26, 27, 28, 29, 30, 31, 39, 43,

53, 54, 55, 56, 64, 65

1011-003016-000

000-810305-1101,5R1rotsiseRmliFlateMW521.0K51

22K 0.125 W Metal Film Resistor 1 R21

27K 0.125 W Metal Film Resistor 1 R61

47K 0.125 W Metal Film Resistor 5 R9, 48, 49, 50, 51 1014-703016-000

56K 0.125 W Metal Film Resistor 2 R52, 57

000-810308-6101,7R2rotsiseRmliF

lateMW521.0K86

82K 0.125 W Metal Film Resistor 1 R59 1018-203018-000

100K 0.125 W Metal Film Resistor 1 R63 1011-004016-000

220K 0.125 W Metal Film Resistor 1 R6 1012-204016-000

3pF Ceramic COG 50V 5mm Pitch 1 C1

15pF Ceramic COG 50V 5mm Pitch 2 C16, 17 1100-150043-000

25pF Ceramic COG 50V 5mm Pitch 2 C80, 81 1100-250042-000

47pF Ceramic COG 50V 5mm Pitch 1 C76 1100-470043-000

100pF Ceramic COG 50V 5mm Pitch 1 C73

470pF Ceramic 50V 5mm Pitch 2 C24, 25 1100-471043-000

000-340201-001178C1hctiPmm5V05cimareCFn1

10nF Ceramic 50V 5mm Pitch 1 C75 1100-103043-000

10nF Mylar 5mm Pitch 1 C7

15nF Ceramic 50V 5mm Pitch 1 C8 1100-153043-000

47nF Ceramic 50V 5mm Pitch 11 C5, 11, 13, 15, 19, 22, 23, 26, 27,

60, 66 1100-473044-000

100nF Ceramic 50V 5mm Pitch 20

C2, 4, 44, 45, 48, 49, 51, 52, 53,

54, 57, 58, 59, 61, 62, 64, 67, 71,

79, 86

1106-104044-000

220nF Ceramic 50V 5mm Pitch 2 C3, 72 1100-224044-000

000-360272-10116C1hctiPmm5ralyM7n

000-260274-101112C1hctiPmm5ralyM7n4

1uF 16V Electrolytic 1 C12 1102-107044-000

10uF 16V Electrolytic 1 C82 1102-100024-000

22uF 16V Electrolytic 2 C14, 68 1102-220014-000

47uF 16V Electrolytic 10 C9, 10, 18, 20, 28, 29, 70, 74, 77,

78 1102-470014-000

100uF 16V Electrolytic 2 C69, 85 1102-101014-000

220uF 16V Electrolytic 3 C56, 65, 84 1102-221014-000

470uF 16V Electrolytic 3 C46, 47, 83 1102-471014-000

3300uF 25V Electrolytic 1 C50 1102-332024-000

PY474 TA2153FN TOSHIBA RF Amplier 1 U1 4121-530103-000

PY475 TC9462FG TOSHIBA Digital Servo-chip

Processor ABIHSOTPFQSNIP001000-321026-49142U1

Cambridge Audio Azur 840C Servo PCB Assembly BOM

RESISTORS

CAPACITORS

SEMICONDUCTORS

Note: resistors, capacitors and other 'generic' electronic components are

not usually stocked by the manufacturer. Please obtain these locally.

AP19969/3

AP Part

No Value Description Qty Component Ident Factory Part no Notes

Cambridge Audio Azur 840C Servo PCB Assembly BOM

PY565 TOSHCDMCU MCU TMP87EP26F-1J15 SOP

TOSHIBA 000-301062-78143U1

000-350029-02146U1CIrevirdrewoPABIHSOTN2902AT374YP t heatsink to top of driver

006-203080-87147U1rotalugeRV

8+022-OT8087613YP mount on heatsing using

heatsink comound only

007-433050-87148U1rotalugeRV5+022-OT5087530DP

PY014 C8050D NPN Transistor TO92 4 Q7, 8, 11, 12 1300-805000-100

PY558 9014C NPN Transistor 1 Q13 1300-901400-100

001-000558-103101,9Q2rotsisnarTPNP05

58C955YP

001-005109-10311Q1rotsisnarTPNPC5109065YP

1N4148 Signal Diode 3 D9, 10, 11 1401-141480-000

1N4004 Rectier Diode 4 D2, 3, 4, 5 1401-140040-000 stand up o PCB by 7.5mm

000-343961-00611X1hctiPmm5niP2zHM4439.61720YP

099-282737-00612X1hctiPmm5niP2zHM8273.7165YP

100-000200-00321271NC2TSJhctiPmm2yaW2

100-000300-0032,1NC1TSJhct

iPmm2yaW3

000-000500-0032,8,2NC2TSJhctiPmm2yaW5

000-000600-003251NC1TSJhctiPmm2yaW6

000-000700-00327,6NC2TSJhctiPmm2yaW7

000-000800-00325,4,3NC3TSJhctiPmm2yaW8

300-001200-003291NC1TSJhctiPmm5.2yaW2

000-109610-103261NC1hctiPmm0.1CFFyaW61

100-001050-13041UF1redloHesuFtnuoMBCPmm02

T2AL 2A delay 20mm Fuse 250V LBC

(low breaking capacity) 100-200816-03041UF1

10uH Inductor 8mm Pitch 1 L2

001-00307

4-40511L1hctiPmm8rotcudnIHu74

001-003101-40515,4,3L3hctiPmm8rotcudnIHu001

CRYSTALS

CONNECTORS

MISCELLANEOUS

Note: resistors, capacitors and other 'generic' electronic components are

not usually stocked by the manufacturer. Please obtain these locally.

Cambridge Audio Azur 840C CD Player

AP17977/2 Voltage Select Switch PCB Schematic

FROM J4 (Common)

SW1

VOLTSELECT RF1002B

115/230V Marking

BROWN (230V)

BLACK (115V)

To enhance viewing, please print to A3 18

Cambridge Audio Azur 840C CD Player

AP17977/2 Voltage Select Switch Board Layout (Top Side)

To enhance viewing, please print to A3 19

Cambridge Audio Azur 840C CD Player

AP17977/2 Voltage Select Switch Board Layout (Bottom Side)

To enhance viewing, please print to A3 20

AP17980/1

AP Part

No Value Description Qty Component Ident Factory Part Number Notes

000-002010-60421WS1rotceleSegatloVB2001FR

Cambridge Audio Azur 840C V2 Voltage Selector PCB Assembly BOM

CONNECTORS

Note: resistors, capacitors and other 'generic' electronic components are

not usually stocked by the manufacturer. Please obtain these locally.

Cambridge Audio Azur 840C CD Player

AP19129/4 DAC DSP Circuit Diagram (ABus)

IR OUT

IR IN

CN100

JACK-CKX-3.5-12

3.5mm JACK

+5V

OPT

GND

TSOP1836 IR RECEIVER

+5V

U3:A

4011

VDD=+5V

VSS=GND

OP4N25

U3:B

4011

VDD=+5V

VSS=GND

U3:C

4011

VDD=+5V

VSS=GND

U3:D

4011

VDD=+5V

VSS=GND

+5V

10uF 16V

36 kHz

IR receiver

CA IR DEMODULATOR

CN1:A

AV2-8,4-14/EC

CN1:B

AV2-8,4-14/EC

220R 0805

10K

0805

10K

0805

BC817-16 SM

10K

0805

100R 0805

100R

0805

2R2

0805

1N 50V NP0 SM

0805

IR OUT

47R

0805

need to assign package

CN2

CONN-9W D-TYPE

+5V

SERIAL_RX

SERIAL_TX

RS232

R15

100R 0805

1N 50V NP0 SM

0805

1N 50V NP0 SM

0805

OUTPUT

GND

VCC

APRX179AT

1 2

CN3

AV-8,4-8ES

100N 50V Y5V SM

0805

10U 16V EL

R16

100R 0805

C11

1N 50V NPO SM

0805

R18

75R

0805

OUTPUT

GND

VCC

APRX179AT

CN4

AV-8,4-8ES

100N 50V Y5V SM

0805

C10

10U 16V EL

R17

100R 0805

C13

1N 50V NPO SM

0805

R19

75R

0805

U6:A

74VHC14

VCC=+5V_DIG

U6:C

74VHC14

VCC=+5V_DIG

U6:D

74VHC14

VCC=+5V_DIG

1110

U6:E

74VHC14

VCC=+5V_DIG

U6:F

74VHC14

VCC=+5V_DIG

R20

100R

0805

R21

10K 0805

R22

100R

0805

R23

10K 0805

R24

100R 0805

R25

100R0805

C17

100P 50V Y5V SM

0805

C18

100P 50V Y5V SM

0805

MULTIPLEXER 1MULTIPLEXER 2

1-IN3

1-IN2

1-IN1

1-IN0

2-IN3

2-IN2

2-IN1

2-IN0

GND

VCC

74VHC153

3.3V

SO1_U7

3.3V

C19

100N 50V Y5V SM

0805

R26

10K

0805

R27

10K

0805

U8:A

74VHC32

VCC=3.3V

U8:B

VCC=3.3V

U8:C

VCC=3.3V

U8:D

VCC=3.3V

R28

0R 0805

CS8416_RXP0

MULTIPLEXER 1 MULTIPLEXER 2

1-IN3

1-IN2

1-IN1

1-IN0

2-IN3

2-IN2

2-IN1

2-IN0

GND

VCC

CS8406_TXP

+5V_DIG

C20

100N 50V Y5V SM

0805

SO1_U9 SO2_U9

fs = 44.1kHz

fs = 48kHz min

servo spdif pass through

fs = 44.1kHz

spdif input pass through

R29

0805

R31

430R

0805

R32

91R

0805

1 2

CN5

AV-8,4-8ES

C22

100P 50V Y5V SM

0805

C23

100N 50V Y5V SM

0805

GND

VCC

INPUT

U10

APTX179AT

+5V_DIG

C24

100N 50V Y5V SM

0805

C26

10U 16V EL

R33

100R 0805

74HCT153

1 2

U23:A

VCC=+5V_DIG

U23:B

VCC=+5V_DIG

U23:C

VCC=+5V_DIG

13 12

U23:D

VCC=+5V_DIG

11 10

U23:E

VCC=+5V_DIG

9 8

U23:F

VCC=+5V_DIG

U6:B

74VHC14

VCC=+5V_DIG

R65

0805

+5V

400K

C1+

C1-

C2+

C2-

T2IN

R1OUT

T1IN

T1OUT

T2OUT

R1IN

R2OUT

R2IN

V-

V+

VCC

GND

U28

MAX202 SM

C144

100N 50V X7R SM

0805

C145

100N 50V X7R SM

0805

C146

100N 50V X7R SM

0805

C147

100N 50V X7R SM

0805

C148

100N 50V X7R SM

0805

R70

100R

0805

R71

100R

0805

C161

100N 50V Y5V SM

0805

+5V_DIG

C162

100N 50V Y5V SM

0805

+5V_DIG

C163

100N 50V Y5V SM

0805

3.3V

47UH SM

74HCU04

C12

100N 50V X7R SM

0805

C14

100N 50V X7R SM

0805

C21

100N 50V X7R SM

0805

100N 50V X7R SM

0805

100N 50V X7R SM

0805

SERVO_SPDIF_OUT

R66

100R

0805

SERVO_SPDIF_OUT_3.3V

C201

47P 50V Y5V SM

0805

C202

47P 50V Y5V SM

0805

C215

100N 50V Y5V SM

0805

C222

100N 50V Y5V SM

0805

R85

100R

0805

C275

100N 50V X7R SM

0805

C278

100N 50V CER

C279

100N 50V CER

R10

220R

0805

C273 position

100R

0805

C274 position

100R

0805

1INDICATES TEST POINT REF

SEE DAC TEST SIGNALS LIST

FOR SIGNAL DESCRIPTION

To enhance viewing, please print to A3 22

Cambridge Audio Azur 840C CD Player

AP19129/5 DAC Test Signals (Main Signal Paths General)

Test Point

Schematic Ref Page Signal

Type

Measurement

Node tnemerusaeMnoitpircseD Meter

Type

epocs‘langisatadlairessuounitnoCV5P/I1lac

itp

FIDP

S3ni

7Ul

epocs

‘langisatadlairessuounitnoCV5trevn

ocle

elr

aP/I1xao

cFIDP

S31

ip7

epocs‘lang

isatadlairessuou

nitnoCV5P/I2lac

poFIDP

ip7U

epocs‘langisatadlairessuoun

itnoCV5tre

vnocleve

lretfaP/I2xao

cFID

PS21n

ip7U

tig

epocs‘langisatadlairessuou

itnoC3V3

)detceles2ro1P/I(2r

o1P

lac

itp

FIDPS1nip8Ul

tig

epocs‘langisatadlairessuounitnoC3V3)detceles2ro1P/I(2r

o1P

/Ixaoc

DPS2n

ip8Ul

atig

epocs‘langisata

uounitnoC3

3)PSDot(0hcXR

DPSot

itc

sP/Ir

angisFI

DPS3nip

lat

epocs‘langisatadlai

ressuounitnoCV5)detceleskcaby

lpD

ovresDCm

fla

PS4

p8U

latigiD18

‘

angisat

lairessuou

oC3V3)PSDot

(2hcXR

esD

rflangisFIDP

6ni

8Ulat

iD19

10 1 Digital U9 pin 5 SPDIF signal from CD servo 3V3 pass thro’ (CD playback & Pass thro’ selected) 3V3 Continuous serial data signal ‘scope

epocs‘langisa

tadl

essuou

nit

noC3

V3)

Dmorf(XTFIDPSmorfla

isFIDPS

tigiD111

epocs‘

langi

atad

lairessuou

nitnoC

5P/

itpo/x

ip9Ulatig

Cambridge Audio Azur 840C CD Player

AP19129/4 DAC DSP Circuit Diagram (DSP)

BITCLK

WDCLK

SDATA_L

SDATA_R

CS_DAC1

CS_DAC2

RELAY

DSP RESET

RESET

DAC1_MCLK

DAC2_MCLK

MOSI

SCK

SS_1

SCK_1

DSP_MISO_1

DSP_MOSI_1

A18

A17

A16

A15

A14

A13

A12

A11

A10

WE_FLASH#

OE_FLASH#

CS_FLASH#

MUTE

I2S DATA

I2S FRAME

INTREQ

MISO

RXP3

RXP2

RXP1

RXP0

RXN

AGND

FILTER

RST

RXP4

RXP5

RXP6

RXP7

AD0/CS

AD1/CDIN

SCL/CCLK

SDA/CDOUT

AD2/GPO2

GPO2

GPO0

DGND

RMCK

OMCK

SDOUT

OSCLK

OLRCK

U11

CS8416

CS8416_RXP0

SERVO_SPDIF_OUT_3.3V

C27

100N 50V Y5V SM

0805

3.3V

R34

0805

C31

10U 16V EL

R35

100R

24.576MHz

3.3V

R37

10K

0805

R39

10K 0805

CS8406_TXP

R41

10K0805

VCC

CLK

N/C

GND

24.576MHz

C36

10U 16V EL

+5V_OSC

U15:A

74VHC14

VCC=OSC_3.3V

U15:B

74VHC14

U15:C

74VHC14

13 12

U15:D

74VHC14

11 10

U15:E

74VHC14

U15:F

74VHC14

R42

100R 0805

R43

100R 0805

R44

100R 0805

R45

100R 0805

C37

10P 50V Y5V SM

0805

C38

10P 50V Y5V SM

0805

C39

10P 50V Y5V SM

0805

C40

10P 50V Y5V SM

0805

SCHMITT INVERTER

C41

10P 50V Y5V SM

0805

R46

100R 0805

R49

33R

4 5

R54

33R

R57

1K 0805

R58

1K 0805

4 5

R55

33R

R56

10K 0805

R61

100R 0805

4 5

R62

100R

R36

33R

4 5

R50

100R

910

CN6

CONN-7HEAD DUAL

R51

10K

R52

4K7

0805

3.3V DSP

JTEG

1.2V

3.3V

4 5

R53

33R

4 5

R59

33R

SDA/CDOOUT

AD0/CS

AD2

RXP

TEST

RST

TEST

ILRCK

ISCLK

SDIN

TCBL

TEST

INT

OMCK

GND

H/S

TXN

TXP

AD1/CDIN

SCL/CCLK

U12

CS8406

3.3V

R38

100R

0805

R40

100R 0805

4 5

R60

100R

4 5

R63

100R

2 3

U19:A

74VHC125

VCC=3.3V

U19:B

VCC=3.3V

U19:C

VCC=3.3V

12 11

U19:D

VCC=3.3V

U20:A

VCC=+5V

U20:B

74HCT125

VCC=+5V

U20:C

VCC=+5V

1211

U20:D

VCC=+5V

U_INTREQ

U_MISO

U_MOSI

U_SCLK

U_SS

U_RESET

VCC

RST

GND

U21

DS1818

1 FUNCTIONAL

0MODE

1 BOOT

0 MODE

GND

VROUT2

VROUT1

VDDEXT

GND

CLKIN

XTAL

VDDEXT

RESET

NMI

GND

RTXO

RTXI

VDDRTC

GND

VDDEXT

PPI_CLK

PPI0

PPI1

PPI2

PPI3

VDDINT

PF15/PPI4

PF14/PPI5

PF13/PPI6

GND

VDDEXT

PF12/PPI7

PF11/PPI8

PF10/PPI9

PF9/PPI10

PF8/PPI11

PF7/SPISEL7/PPI12

PF6/SPISEL6/PPI13

GND

VDDEXT

PF5/SPISEL5/PPI14

PF4/SPISEL4/PPI15

PF3/SPISEL3/PPI_FS3

PF2/SPISEL2

PF1/SPISEL1/TMRCLK

PF0/SPISS

VDDINT

SCK

MISO

MOSI

GND

VDDEXT

DT1SEC

DT1PRI

TFS1

TSCLK1

DR1SEC

DR1PRI

RFS1

RCLK1

VDDINT

DT0SEC

DT0PRI

TFS0

GND

VDDEXT

TSCLK0

DR0SEC

DR0PRI

RFS0

RSCLK0

TMR2

TMR1

TMR0

VDDINT

EMU

TRST

TMS

TD1

TD0

GND

VDDEXT

TCK

BMODE1

BMODE0

GND

DATA15

DATA14

DATA13

100

DATA12

101

DATA11

102

DATA10

103

DATA9

104

DATA8

105

GND

106

VDDEXT

107

DATA7

108

DATA6

109

DATA5

110

DATA4

112

VDDINT

111

DATA3

113

DATA2

114

DATA1

115

DATA0

116

GND

117

VDDEXT

118

119

BGH

120

ADDR19

121

ADDR18

122

ADDR17

123

ADDR16

124

ADDR15

125

ADDR14

126

ADDR13

127

GND

128

GND

129

GND

130

GND

131

GND

132

GND

133

VDDEXT

134

ADDR12

135

ADDR11

136

ADDR10

137

ADDR9

138

ADDR8

139

ADDR7

140

ADDR6

141

ADDR5

142

VDDINT

143

GND

144

VDDEXT

145

ADDR4

146

ADDR3

147

ADDR2

148

ADDR1

149

ABE1

150

ABE0

151

AWE

152

ARE

153

AOE

154

GND

155

VDDEXT

156

VDDINT

157

AMS3

158

AMS2

159

AMS1

160

AMS0

161

ARDY

162

163

SA10

164

SWE

165

SCAS

166

SRAS

167

VDDINT

168

CLKOUT

169

GND

170

VDDEXT

171

SMS

172

SCKE

173

GND

174

GND

175

GND

176

GND

U13

ADSP-BF532

R30

0R 0805

R64

0R 0805

I2S ERR

C28

100N 50V X7R SM

0805

C29

100N 50V X7R SM

0805

C30

10N 50V X7R SM

0805

C32

100N 50V X7R SM

0805

C33

100N 50V X7R SM

0805

C97

100N 50V X7R SM

0805

C74

100N 50V X7R SM

0805

C165

10U 16V EL

C166

10U 16V EL

C167

10U 16V EL

C75

100N 50V X7R SM

0805

C76

100N 50V X7R SM

0805

C77

100N 50V X7R SM

0805

C78

100N 50V X7R SM

0805

C96

100N 50V X7R SM

0805

C79

100N 50V X7R SM

0805

C80

100N 50V X7R SM

0805

C81

100N 50V X7R SM

0805

C82

100N 50V X7R SM

0805

C83

100N 50V X7R SM

0805

C84

100N 50V X7R SM

0805

C85

100N 50V X7R SM

0805

C86

100N 50V X7R SM

0805

C95

100N 50V X7R SM

0805

C87

100N 50V X7R SM

0805

C88

100N 50V X7R SM

0805

C89

100N 50V X7R SM

0805

C90

100N 50V X7R SM

0805

C91

100N 50V X7R SM

0805

C92

100N 50V X7R SM

0805

C93

100N 50V X7R SM

0805

C94

100N 50V X7R SM

0805

C168

100N 50V X7R SM

0805

C169

100N 50V X7R SM

0805

3.3V

+5V

R132

100R 0805

D15

BAS16 75V 0,3A

D16

BAS16 75V 0,3A

MUTE_PIC

R135

10K

0805

3.3V DSP

C149

10U 35V EL

C143

10U 35V EL

R153

33R 0805

R130

10K

0805

3.3V DSP

CN11

HEADER 3WAY

HW/SW

1.2V DSP

R87

10K

0805

R88

10K

0805

3.3V 3.3V

0R 1206

R89

0R 1206

INDICATES TEST POINT REF

SEE DAC TEST SIGNALS LIST

FOR SIGNAL DESCRIPTION

18 19 20

To enhance viewing, please print to A3 24

Cambridge Audio Azur 840C CD Player

AP19129/5 DAC Test Signals (Main Signal Paths General)

Test Point

Schematic Ref Page Signal

Type

Measurement

Node tnemerusaeMnoitpircs

DMeter

Type

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qszHM675.423V3kcolcret

amXRFIDPS52

nip1

14 2 Digital U11 pin 26 From SPDIF RX Digital audio Data (SPDIF I/P or CD With disc playing) 3V3 Continuous serial data signal ‘scope

15 2 Digital U11 pin 27 From SPDIF RX Digital audio Bit CLK ( CD selected With disc playing) 3V3 square wave 2.8MHz (for 44.1kHz

sample freq from CD) ‘scope

16 2 Digital U11 pin 28 From SPDIF RX Digital audio Word CLK ( CD selected With disc playing) 3V3 square wave 44.1kHz (for 44.1kHz

sample freq from CD) ‘scope

epocs‘evawerauqszHM675.423V3kcolcrets

mXT

PS1

nip2

UlatigiD2

18 2 Digital U12 pin 14 To SPDIF TX Digital audio Data (SPDIF I/P or CD With disc playing) 3V3 Continuous serial data signal ‘scope

19 2 Digital U12 pin 13 To SPDIF TX Digital audio Bit CLK (CD selected With disc playing &

Upsample frequency set to 48kHz)

3V3 square wave 3MHz (for 48kHz

sample freq from DSP) ‘scope

20 2 Digital U12 pin 12 To SPDIF TX Digital audio Word CLK ( CD selected With disc playing) 3V3 square wave 48kHz (for 48kHz

sample freq from DSP) ‘scope

epocs‘e

vawerau

szHM675.

V3kcolcretsaMPSD83C/44RlatigiD21

To enhance viewing, please print to A3 25

Cambridge Audio Azur 840C CD Player

AP19129/5 DAC DSP Filters Circuit Diagram

MUTE

RESET

MUTE

RESET

DAC1_MCLK

SCK

CS_DAC1

MOSI

DAC2_MCLK

SCK

CS_DAC2

MOSI

WDCLK

BITCLK

SDATA_R

SDATA_L

BITCLK

WDCLK

DVDD

LRCLK

BCLK

SDATA/EF_LDATA

EF_RDATA

DSD_SCLK

DSD_LDATA

DSD_RDATA

DSD_PHASE

AGND

IOUTR+

IOUTR-

FILTR

IREF

AVDD

FILTB

IOUTL-

IOUTL+

AGND

ZEROR

ZEROL

MUTE

PD/RST

CDATA

CLATCH

CCLK

MCLK

DGND

U130

AD1955

DAC1_VA_+5V

DVDD

LRCLK

BCLK

SDATA/EF_LDATA

EF_RDATA

DSD_SCLK

DSD_LDATA

DSD_RDATA

DSD_PHASE

AGND

IOUTR+

IOUTR-

FILTR

IREF

AVDD

FILTB

IOUTL-

IOUTL+

AGND

ZEROR

ZEROL

MUTE

PD/RST

CDATA

CLATCH

CCLK

MCLK

DGND

U131

AD1955

C53

47N 50V ECHU SM

C54

10U 25V NP

DAC2 _VA_+5V

C55

10U 25V NP

C56

47N 50V ECHU SM

LEFT

RIGHT

+5V_DAC

C98

10U NP 35V

C99

10U NP 35V

+5V_DAC

C153

47N 50V ECHU SM

C154

10U 25V NP

C155

47N 50V ECHU SM

C156

10U 25V NP

C151

10N 50V ECHU SM

C152

10U 25V NP

C157

47N 50V ECHU SM

C48

47N 50V ECHU SM

C158

47N 50V ECHU SM

C159

10U 25V NP

8 5

U34

OPA842

2V8_VREF_R

4 7

U33

OPA842

R75

300R 1206

R76

300R 1206

DAC2 _VA_+5V

C172

10pF 50V NPO 0603

C173

10pF 50V NPO 0603

IR-

IR+

PWR PAD

U35

OPA1632

R79

820R 1206

R80

820R 1206

R81

2K4 1206

R82

2K4 1206

R83

2K7 1206

R84

2K7 1206

-15V(2)

R91

47R 1206

R92

47R 1206

CN12:A

AV2-8,4-13EL

CN12:B

AV2-8,4-13EL

BC807-25 SM

IR-

BC807-25 SM

IR+

10V_R

8 5

U37

OPA842

2V8_VREF_L

4 7

U38

OPA842

R101

300R 1206

R102

300R 1206

DAC1_VA_+5V

-5V

C190

10pF 50V NPO 0603

C191

10pF 50V NPO 0603

IL-

IL+

8 5

PWR PAD

U39

OPA1632

R105

820R 1206

R106

820R 1206

R107

2K4 1206

R108

2K4 1206

R109

2K7 1206

R110

2K7 1206

-15V

R118

47R 1206

R117

47R 1206

BC807-25 SM

IL-

BC807-25 SM

IL+

10V_L

U41:A

OPA2134

C208

470N 50V X7R SM

+15V

-15V

U41:B

OPA2134

C209

220N 50V X7R SM

+15V(2)

-15V(2)

RL1:B

ME2-5S

RL1:C

ME2-5S

R129

47R

0805

C210

1nF 50V X7R SM

RL2:B

ME2-5S

RL2:C

ME2-5S

+15V(2)

U46:A

OPA2134

U46:B

OPA2134

DAC1_VA_+5V

DAC2 _VA_+5V

-5V(2)

R148

100R

R150

100R

R149

100R

R147

100R

DAC1_VA_+5V

C15

47N 16V ECHU SM

-5V

DAC1_VA_+5V

C67

47N 16V ECHU SM

1206

C139

47N 16V ECHU SM

1206

-5V

DAC2 _VA_+5V

C220

47N 16V ECHU SM

1206

C228

47N 16V ECHU SM

1206

-5V(2)

DAC2 _VA_+5V

C229

47N 16V ECHU SM

1206

C230

47N 16V ECHU SM

1206

-5V(2)

+15V(2)

-15V(2)

C207

220pF 50V X7R SM

C206

220pF 50V X7R SM

C234

47N 16V ECHU SM

1206

GND

CN13

WL5032 XLR MALE

GND

CN14

WL5032 XLR MALE

C175

47U 25V EL

C179

47U 25V EL

R68

100R 1206

R69

100R 1206

R73

100R 1206

R74

100R 1206

C182

470N 50V X7R SM

C184

220N 50V X7R SM

R168

10R 0805

R170

10R 0805

C231

47N 16V ECHU SM

1206

C232

47N 16V ECHU SM

1206

C198

1N 50V NP0 0603

0603

C199

1N 50V NP0 0603

0603

+15V

-15V

C233

47N 16V ECHU SM

1206

C235

47N 16V ECHU SM

1206

C203

1N 50V NP0 0603

0603

C214

1N 50V NP0 0603

0603

D25

BYG10G

D26

BYG10G

D27

BYG10G

D28

BYG10G

+5V_DAC

DAC1_VA_+5V DAC2 _VA_+5V

C72

1N 50V NP0 0603

0603

C73

1N 50V NP0 0603

0603

C122

1N 50V NP0 0603

0603

C123

1N 50V NP0 0603

0603

C170

1N 50V NP0 0603

0603

C171

1N 50V NP0 0603

0603

C180

1N 50V NP0 0603

0603

C181

1N 50V NP0 0603

0603

RL3:B

ME2-5S

RL3:C

ME2-5S

U40:A

OPA2134

U40:B

OPA2134

R90

1206

R99

1206

+15V

-15V

R100

1206

R111

1206

R112

10K

1206

R113

1206

LEFT O/P

C239

47P 50V NP0 SM

C238

47P 50V NP0 SM

C242

47N 16V ECHU SM

1206

C255

47N 16V ECHU SM

1206

+15V

-15V

U50:A

OPA2134

U50:B

OPA2134

R114

1206

R115

1206

+15V(2)

-15V(2)

R116

1206

R162

1206

R169

10K

1206

R171

1206

RIGHT O/P

C256

47P 50V NP0 SM

C257

47P 50V NP0 SM

C258

47N 16V ECHU SM

-15V(2)

C259

47N 16V ECHU SM

1206

+15V(2)

U52:A

OPA2134

U52:B

OPA2134

C204

47N 16V ECHU SM

C205

47N 16V ECHU SM

+VL

-VL

C260

47N 16V ECHU SM

C261

47N 16V ECHU SM

+15V

-15V

U53:A

OPA2134

U53:B

OPA2134

C186

47N 16V ECHU SM

-15V(2)

C187

47N 16V ECHU SM

+15V(2)

C262

47N 16V ECHU SM

-VR

C263

47N 16V ECHU SM

+VR

R104

47R

1206

R155

10K

1206

R172

47R

1206

R173

10K

1206

C176

180p 63V PP

C177

180p 63V PP

C188

1N5 63V PP

C174

1N5 63V PP

C194

180p 63V PP

C195

180p 63V PP

C185

1N5 63V PP

C192

1N5 63V PP

R174

100K

0805

R175

100K

0805

R176

100K

0805

R177

100K

0805

R178

100K

0805

R179

100K

0805

C264

100P 50V NP0 SM

0805

C265

100P 50V NP0 SM

0805

C266

100P 50V NP0 SM

0805

C267

100P 50V NP0 SM

0805

C268

100P 50V NP0 SM

0805

C269

100P 50V NP0 SM

0805

+VL

-VL

-VR

+VR

R93

0603

R94

0R NF

0603

R119

0R 0603

R120

0603

R180

0603

R181

0603

R182

0R 0603

R183

0603

+15V(2)

10V_R

-15V(2)

+15V

10V_L

-15V

R77

2K7 MELF

0805

R121

2K0 MELF

0805

R122

330R MELF

0805

R124

330R MELF

0805

R103

2K7 MELF

0805

R123

2K0 MELF

0805

R125

47R MELF

0805

R126

1M MELF

0805

R159

12K MELF

0805

R158

1M MELF

0805

R78

2K7 MELF

0805

R95

2K0 MELF

0805

R96

330R MELF

0805

R98

330R MELF

0805

R134

2K7 MELF

0805

R97

2K0 MELF

0805

R128

1M MELF

0805

R127

12K MELF

0805

R157

47R MELF

0805

R156

1M MELF

0805

R186

10R 1206

1206

C276

100N 50V X7R SM

0805

C277

100N 50V X7R SM

0805

R187

10R 1206

1206

R48

3K MELF

0805

R47

3K MELF

0805

C196

47N 16V ECHU SM

C178

47N 16V ECHU SM

INDICATES TEST POINT REF

SEE DAC TEST SIGNALS LIST

FOR SIGNAL DESCRIPTION

23 24 25

41 42 43

To enhance viewing, please print to A3 26

Cambridge Audio Azur 840C CD Player

AP19129/5 DAC Test Signals (Main Signal Paths Left Channel)

Test Point

Schematic Ref epyTreteMtnemerusaeMnoitpircseDedoN

neme

usa

Mep

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egaP

epocs‘evawerauqszHM675.423V3kcolcret

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031Ulati

23 4 Digital U130 pin 4 To DAC1 Digital audio Data (SPDIF I/P or CD With disc

playing) 3V3 Continuous serial data signal ‘scope

24 4 Digital U130 pin 3 To DAC1 Digital audio Bit CLK (CD selected With disc

playing) 3V3 square wave 12.288MHz ‘scope

25 4 Digital U130 pin 2 To DAC1 Digital audio Word CLK (CD selected With disc

playing)

3V3 pulses to 0V repetition rate

384kHz. ‘scope

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ecruo

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rete

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recruos

rruC1

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mtlovcdV3.3egatlovf

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Cambridge Audio Azur 840C CD Player

AP19129/5 DAC Test Signals (Main Signal Paths Left Channel)

Test Point

Schematic Ref epyTreteMtnemerusaeMnoitpircse

oNt

aeMepy

Approx -0.45V dc voltmeter

1kHz sine wave 2V p-p ‘scope

0.02% THD+N (22K BW) THD meter

Voltage/Analogue Approx -0.45V dc voltmeter

THD meter 1kHz sine wave 2V p-p scope

0.02% THD+N (22K BW) THD meter

Voltage/Analogue Less than 5mV dc Voltmeter’scope

THD meter 1kHz sine wave 6.3V p-p 2.2Vrms scope

approx 0.001% THD+N (22K

BW )THD meter

(0.0006% bal THD +N (22K BW)

a/c pins 4 & 5 U39 ) THD meter

Voltage/Analogue Less than 5mV dc voltmeter

THD meter 1kHz sine wave 6.3V p-p 2.2Vrms ‘scope

approx 0.001% THD+N (22K

BW ) THD meter

(0.0006% THD +N (22K BW) bal

a/c pins 4 & 5 U39 ) THD meter

Voltage/Analogue Less than 5mV dc voltmeter

THD meter 1kHz sine wave 6.3V p-p 2.2Vrms scope

approx 0.0006% THD +N (22K

BW ) THD meter

*THD Measurements: Measurements taken using Audio Precision System 1 with X1 1M scope prob

7nip04U4*9

O/P unbalanced stage dc voltage / ac waveform / THD

measurement (CD selected With disc playing 1kHz 0dB FS

tone)

5nip93U4

83 measurement (CD selected With disc playing 1kHz 0dB FS

tone)

4nip9

3U4

3measurement (CD selected With disc playing 1kHz 0dB FS

tone)

Current to voltage O/P +ve dc voltage / ac waveform /

THD measurement (CD selected With disc playing 1kHz

0dB FS tone)

6nip73U4

Current to voltage O/P -ve dc voltage / ac waveform /

THD measurement (CD selected With disc playing 1kHz

0dB FS tone)

35* 4 Voltage/Analogue U38 pin 6

Cambridge Audio Azur 840C CD Player

AP19129/5 DAC Test Signals (Main Signal Paths Right Channel)

Test Point

Schematic Ref Page Signal Type Measurement

Node epyTreteMtnemerusaeMnoitpircseD

epocs‘evawerauqszHM675.423V3kcolc

rets

am2CADoT

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41 4 Digital U131 pin 5 To DAC2 Digital audio Data (SPDIF I/P or CD With

disc playing) 3V3 Continuous serial data signal ‘scope

42 4 Digital U131 pin 3 To DAC1 Digital audio Bit CLK (CD selected With disc

playing) 3V3 square wave 12.288MHz ‘scope

43 4 Digital U131 pin 2 To DAC1 Digital audio Word CLK (CD selected With

disc playing)

3V3 pulses to 0V repetition rate

384kHz. ‘scope

44 4 Voltage U33 pin 2 Mid rail DC voltage of +ve current O/P of DAC 2.8V dc voltmeter

45 4 Voltage U34 pin 2 Mid rail DC voltage of -ve current O/P of DAC 2.8V dc voltmeter

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Cambridge Audio Azur 840C CD Player

AP19129/5 DAC Test Signals (Main Signal Paths Right Channel)

Test Point

Schematic Ref Page Signal Type Measurement

Node epyTreteMtnemerusaeMnoitpircseD

Approx -0.45V dc Voltmeter’scope

1kHz sine wave 2V p-p scope

0.02% THD+N (22K BW) THD meter

Voltage/Analogue Approx -0.45V dc voltmeter

THD meter 1kHz sine wave 2V p-p scope

0.02% THD+N (22K BW) THD meter

Voltage/Analogue Less than 5mV dc Voltmeter’scope

THD meter 1kHz sine wave 6.3V p-p

2.2Vrms scope

approx 0.001% THD+N (22K

BW )THD meter

(0.0006% THD +N (22K BW)

bal a/cpins 4 & 5 U35 ) THD meter

Voltage/Analogue Less than 5mV dc voltmeter

THD meter 1kHz sine wave 6.3V p-p

2.2Vrms scope

approx 0.001% THD+N (22K

BW THD meter

(0.0006% THD +N (22K BW)

bal a/c pins 4 & 5 U35 )THD meter

Voltage/Analogue Less than 5mV dc voltmeter

THD meter 1kHz sine wave 6.3V p-p

2.2Vrms scope

approx 0.0006% THD +N (22K

BW ) THD meter

Current to voltage O/P +ve dc voltage / ac waveform /

THD measurement (CD selected With disc playing

1kHz 0dB FS tone)

6nip43

U4*

Current to voltage O/P -ve dc voltage / ac waveform /

THD measurement (CD selected With disc playing

1kHz 0dB FS tone)

53 4 Voltage/Analogue U33 pin 6

*55 THD measurement (CD selected With disc playing

1kHz 0dB FS tone)

nip5

3U4

5THD measurement (CD selected With disc playing

1kHz 0dB FS tone)

*THD Measurements: Measurements taken using Audio Precision System 1 with X1 1M scope prob

7nip0

U4*75

O/P unbalanced stage dc voltage / ac waveform / THD

measurement (CD selected With disc playing 1kHz 0dB

FS tone)

Cambridge Audio Azur 840C CD Player

AP19129/5 DAC DSP Flash Circuit Diagram

A12

A10

A14

A15

A18

WE_FLASH#

A17

A16

A13

A5 A4

CS_FLASH#

A11

OE_FLASH#

+5V

OE1

SO1_U7

SO2_U9

SO1_U9

MUTE_PIC

CN8

2MM 8W ST HEADER

SERIAL_RX

SERIAL_TX

IR OUT

CN9

2MM 9W ST HEADER

U_RESET

U_SS

U_SCLK

U_MOSI

U_INTREQ

U_MISO

A11

A13

A14

A17

Vcc

RESET

A16

A15

A12

A10

IO7

IO6

IO5

IO4

IO3

GND

IO2

IO1

1/O0

U32

AT49BV002AN

3.3V DSP

CN7

2MM 3W ST HEADER

R72

100R 0805

SERVO_SPDIF_OUT

C160

100N 50V X7R SM

0805

C164

100N 50V X7R SM

0805

RL1:A

ME2-5S

RL2:A

ME2-5S

+10V UNREG

R141

4K7

0805

R142

10K

0805

R143

100K

0805

C212

1U 35V EL

R144

8K2 0805

0805

R145

2K2

0805

D17

1N4001

AC_5V

D18

1N4001

D20

1N4148

R146

10K

0805

RELAY

R151

100R

R131

4K7

0805

D19

1N4148

R154

10K

0805

OE1

low = mute

high = unmute

high = unmute = relay on

STANDBY CONTROL

D29

1N4004

RL3:A

ME2-5S

MPSA14

BC807-25 SM

R140

62R 2W

C270

470U 16V EL

To enhance viewing, please print to A3 31

Cambridge Audio Azur 840C CD Player

AP19129/5 DAC DSP Supply Circuit Diagram

1N4002

D10

1N4002

+21V UNREG

-21V UNREG

C59

100N 100V

C60

100N 100V

C61

33N 250V

RECTIFIER CHANGE TO SCHOTTKY

1N4002

+10V UNREG

C44

100N 100V

RECTIFIER CHANGE TO SCHOTTKY

GND

U14

7815

GND

U16

7915

+15V

-15V

GND

U17

7805

DAC1_VA_+5V

ANALOGUE SUPPLY

C57

2200U 35V EL

C58

2200U 35V EL

C70

2200U 35V EL

C71

2200U 35V EL

POWER

D11

1N4002

D12

1N4002

D13

1N4002

D14

1N4002

+21V UNREG (2)

-21V UNREG(2)

C35

100N 100V

C100

100N 100V

C101

33N 250V

RECTIFIER CHANGE TO SCHOTTKY

GND

U22

7815

GND

U24

7915

+15V(2)

-15V(2)

GND

U25

7805

DAC2 _VA_+5V

C118

2200U 35V EL

C119

2200U 35V EL

C120

2200U 35V EL

C121

2200U 35V EL

GND

U26

LM1117T_3

3.3V

GND

U27

7805

+5V_DAC

C115

10U 35V EL

GND

U29

7805

+5V_OSC

C125

10U 35V EL

C129

10U 35V EL

1.2V

DSP Vext = 120mA

DSP Vint 150mA

dir & dit = 25mA

logic gates = 5mA

logic gates = 4mA

optical Tx/Rx = 30mA

DAC1 & DAC2 Vd = 44mA

DAC2 Vd = 44mA

DAC1 Vd = 44mA

OSCILLATOR

pic circuitry = 100mA

ABUS

RS232

audio o/p mute relay

C42

2200U 35V EL

C136

2200U 35V EL

C127

10U 35V EL

R11

2R2 2W

R12

2R2 2W

R13

0R 2W

R14

2R2 2W

R67

2R2 2W

GND

U31

7805

+5V

C140

10N 50V ECHU SM

C66

10U 35V EL

GND

U18

LM1117T_3

C131

10U 35V EL

C150

10U 35V EL

OSC_3.3V

C141

10U 35V EL

POLYFUSE 1-1A 60V

POLYFUSE 3.0A 60V

POLYFUSE 1-1A 60V

C43

100N 50V X7R SM

0805

C45

100N 50V X7R SM

0805

C51

100N 50V X7R SM

0805

C52

100N 50V X7R SM

0805

C49

47N 16V ECHU SM

C50

47N 16V ECHU SM

C34

10U 35V EL

Q11

TIP31

BYP

GND

ADJ

U42

LT1761 ADJREG

C216

10N 50V X7R SM

0805

R136

3K3

0805

R137

22K

0805

1.2V

10V_R

SHDN

GND

BYP

U43

LT1761 2,8VREG

C217

10U 35V EL

C218

47N 16V ECHU SM

C219

10N 50V X7R SM 0805

2V8_VREF_R

BYP

GND

ADJ

U44

LT1761 ADJREG

C221

47N 16V ECHU SM

C223

10N 50V X7R SM

0805

R138

3K3

0805

R139

22K

0805

1.2V

10V_L

SHDN

GND

BYP

U45

LT1761 2,8VREG

C224

10U 35V EL

C225

47N 16V ECHU SM

C226

10N 50V X7R SM 0805

C227

10U 35V EL

2V8_VREF_L

etc = 60mA

C113

10U 35V EL

C135

10U 35V EL

C62

100N 50V X7R SM

0805

C63

47N 16V ECHU SM

C47

100N 50V X7R SM

0805

C128

100N 50V X7R SM

0805

C130

100N 50V X7R SM

0805

C132

100N 50V X7R SM

0805

C134

100N 50V X7R SM

0805

C114

100N 50V X7R SM

0805

C116

100N 50V X7R SM

0805

C124

100N 50V X7R SM

0805

C126

100N 50V X7R SM

0805

C69

100N 50V X7R SM

0805

C142

100N 50V X7R SM

0805

C110

100N 50V X7R SM

0805

C111

47N 16V ECHU SM

C106

47N 16V ECHU SM

C107

47N 16V ECHU SM

C108

100N 50V X7R SM

0805

C109

100N 50V X7R SM

0805

C103

100N 50V X7R SM

0805

C102

100N 50V X7R SM

0805

C213

100U 35V EL

C16

100U 35V EL

AC_5V

C25

100U 35V EL

GND

U47

7905 -5V

C244

47N 16V ECHU SM

C245

47N 16V ECHU SM

GND

U48

7905

-5V(2)

C248

47N 16V ECHU SM

C249

47N 16V ECHU SM

(LEFT)

(RIGHT)

C104

100U 35V EL

C105

100U 35V EL

C46

100U 35V EL

C137

100U 35V EL

C247

10U 35V EL

C64

10U 35V EL

C65

10U 35V EL

C250

10U 35V EL

C112

10U 35V EL

C246

10U 35V EL

PAD EMC M3

C117

100N 50V X7R SM

0805

R152

47R

GND

U49

7815

C133

100N 50V X7R SM

0805

C240

100N 50V X7R SM

0805

GND

U51

7815

C243

100N 50V X7R SM

0805

C251

100N 50V X7R SM

0805

C252

10U 35V EL

C241

10U 35V EL

C253

100N 50V X7R SM

1206

C254

100N 50V X7R SM

1206

+10V UNREG

MPSA14

R160

32R 2W

R161

10K

0805

STANDBY CONTROL

CN10

2,5MM 10W ST HEADER

Q10

TIP31

D24

5.1V

R163

470R

1206

R164

470R

1206

R165

10K

0805

R166

10K

0805

HIGH - ON

LOW - STANDBY R167

10K

0805

Q13

BC817-25

Q17

BC817-25

Q18

BC817-25

Q12

BC817-25

BYG10G

D21

BYG10G

D23

BYG10G

D22

BYG10G

PAD EMC M3

C68

1N 50V NP0 SM

0805

C183

1N 50V NP0 SM

0805

C189

1N 50V NP0 SM

0805

C193

47N 16V ECHU SM

D30

1N4004

C197

47N 16V ECHU SM

C200

47N 16V ECHU SM

R86

10K

0805

GND

U36

7805

C211

10U 35V EL

C236

100N 50V X7R SM

0805

C237

100N 50V X7R SM

0805

+5V_DIG

SHDN

GND

ADJ

U30

LT1763 ADJ REG

R184

47R 1206

1206

C271

10U 35V EL

C272

10U 35V EL

R185

47R 1206

1206

C138

100N 50V X7R SM

0805

link

R133

220R 2W

To enhance viewing, please print to A3 32

Cambridge Audio Azur 840C CD Player

AP19129/4 DAC DSP Board Layout (Top Side)

To enhance viewing, please print to A3 33

Cambridge Audio Azur 840C CD Player

AP19129/4 DAC DSP Board Layout (Bottom Side)

To enhance viewing, please print to A3 34

AP19132/6

setoNtnedItnenopmoCytQoNtraPyrotcaFnoitpircseDeulaVoNtraPPA

01R,1R2W360.0rotsiseRR022

A01tnerrucegruSA2

tnerrucdetaR781R,681R,98R,2R4W521.0rotsiseRR0

32W360.0rotsiseRK01 R3-R5, R21, R23, R26, R27, R37, R39, R41, R56, R86-R88,

R130, R135, R142, R146, R154, R161, R165-R167

62W360.0rotsiseRR001

R6, R7, R15, R16, R17, R20, R22, R24, R25, R33, R38, R40,

R42-R46, R61, R66, R70-R72, R85, R132,C273 position,

C274 position

8R1W360.0rots

iseR2R2

921R,9R2W360.0rotsiseRR74

BCPevobasdaeldemrofnotnuom061R1nobraCW2rotsiseRW2R23

BCPevobasdaeldemr

ofnotnuom76R,41R,21R,11R4nobraCW2rotsiseRW22R2

541R1W360.0rotsiseR2K2

91R,81R2W360.0rotsiseRR57

46R,03R,

82R3W360.0rotsiseRR0

56R,85R,75R,43R,92R5W360.0rotsiseRK1

13R1W360.0rotsiseRR034

23R1W360.0rotsiseRR19

1R-741R,36R,26R,06R,05R,53R01kcaprotsiseRR001

95R,55R-35R,94R,63R6kcaprotsiseRR33

84R,74R2W2.0epytFLEMr

otsiseRK3

15R1kcaprotsiseRK01

141R,131R,25R3W360.0rotsiseR7K4

581R,481R,271R,811R,711R,401R,29R,19R8W521

.0rotsiseRR74

201R,101R,67R,57R4W521.0rotsiseRR003

431R,301R,87R,77R4W2.0epytFLEMrotsiseR7K2

601R,501R,0

8R,97R4W521.0rotsiseRR028

801R,701R,28R,18R4W521.0rotsiseR4K2

011R,901R,48R,38R4W521.0rotsiseR7K2

261R,6

11R-411R,111R,001R,99R,09R8W521.0rotsiseRK2

381R181R,021R,39R4W360.0rotsiseRR0

321R,121R,79R,59R4W2.0ep

ytFLEMrotsiseRK2

421R,221R,89R,69R4W2.0epytFLEMrotsiseRR033

371R,961R,551R,211R4W521.0rotsiseRK01

171R,3

11R2W521.0rotsiseRK5

951R,721R2W2.0epytFLEMrotsiseRK21

851R,651R,821R,621R4W2.0epytFLEMrotsiseRM1

BCPevo

basdaeldemrofnotnuom331R1nobraCW2W2R022

831R,631R2W360.0rotsiseR3K3

931R,731R2W360.0rotsiseRK22

BCPevoba

sdaeldemrofnotnuom041R1nobraCW2W2R26

971R-471R,341R7W360.0rotsiseRK001

441R1W360.0rotsiseR2K8

251R1mlifl

atemW52.0R74

351R1W360.0rotsiseRR33

751R,521R2W2.0epytFLEMrotsiseRR74

47R,37R,96R,86R4W521.0rotsiseRR001

461R,361R2W521.0rotsiseRR074

071R,861R2W360.0rotsiseRR01

191C,091C,371C,271C4cimareCOPNV05Fp01

14C-73C5c

imareCOPNV05Fp01

752C,652C,932C,832C,202C,102C6cimareCOPNV05P74

962C-462C,22C,81C,71C9cimareCOPNV05P001

702C,602C2cimareCOPNV05Fp022

591C,491C,771C,671C4eneleporpyloPPPV36Fp051 7.2 X 4.5 ( If dierent manufacturer please

send sample)

21cimareCOPNV05N1 C72, C73, C122, C123, C170, C171, C180, C181, C198,

C199, C203, C214

012C,981C

,381C,86C,31C,11C,6C,5C,1C9cimareC0PNV05N1

291C,881C,581C,471C4eneleporpyloPPPV365N1 7.2 X 4.5 ( If dierent manufacturer please

send sample)

622C,322C,912C,6

12C,03C5cimareCR7XV05N01

101C,16C2retseyloProcimareCV052Fn33

15UHCEV61N74

C15, C48, C49, C50, C53, C56, C63, C67, C106, C107,

C111, C139, C151, C153, C155, C157, C158,C178, C186,

C187, C193, C196, C197, C200, C204, C205, C218, C220,

C221, C225, C228-C235, C242, C244, C245, C248, C249,

C255, C258-C263

69C-68C,48C-57C12cimareCR7

XV05N001

Cambridge Audio Azur 840C DAC PCB Assembly BOM

Resistors

Capacitors

Note: resistors, capaciotrs and other'generic' electronic componetents are

not usually stocked by the manufacturer. Please obtain these locally.

AP19132/6

setoNtnedItnenopmoCytQoNtraPyrotcaFnoitpircseDeulaVoNtraPPA

Cambridge Audio Azur 840C DAC PCB Assembly BOM

66cimareCR7XV05N001

C2, C4, C7, C9, C12, C14, C21, C19, C20, C23, C24, C27,

C28, C29, C32, C33, C43, C45, C47, C51, C52, C62, C69,

C74, C85, C97, C102, C103, C108-C110, C114, C116,

C117, C124, C126, C128, C130, C132-C134, C138, C140,

C142, C144-C148, C160, C161-C163, C164, C168, C169,

C215, C222, C236, C237, C240, C243, C251, C275-C277

452C,352C2cimareCR7XV05N001

972C,872C2cimareCR7XV05N001

001C,06C,95C,44C,53C5cimar

eCcihtylonoMV001N001

902C,481C2cimareCR7XV05N022

802C,281C2cimareCR7XV05N074

212C,761C-561C,63C,13C,62C,

01C,8C,3C01citylortcelEraloPV61U01

72citylortcelEraloPV53U01

C34, C64-C66, C112, C113, C115, C125, C127, C129,

C131, C135, C141, C143, C149, C150, C211, C217, C224,

C227, C241, C246, C247, C250, C252, C271, C272

951C,651C,451C,251C,99C,89C,55C,45C8PNV5

3U01

312C,731C,501C,401C,64C,52C,61C7citylortcelEraloPV53U001

072C1citylortcelEraloPV61U074

*/65491PAeve

elsoiduAegdirbmaChtiW631C,121C-811C,17C,07C,85C,75C,24C01citylortcelEraloPV53U0022

9Q-7Q,5Q,3Q,2Q6MS52

-708CBPNP

NPN (Darlington) MPSA14 2 Q4, Q6

3/80291PAknistaehnotnuoM11Q,01Q213PIT)rewoP(NPN

81Q,71Q,31Q,21Q,1Q552-718CBNPN

PY962 RED LED MV50640 1 D1 IR housing (AP17339/3) with LED MV50640

& TSOP1836 IR Receiver

SMT DIODE BYG10G 8 D2, D21-D23, D25-D28

PY1191 SCHOTTKY RECTIFIER

DIODE 1A SB1H100 4 D3-D6 SUB : 1. MBR1100TR = International

rectier

03D,

92D,41D-7D014004N1EDOID

SMT DIODE BAS16 2 D15, D16

81D,71D21004N1EDOID

02D,91D28414N1EDOID

6.2V ZENER BZX79-C6V2 1 D24

IR Receiver TSOP1836 IR

RECEIVER 1U1

Opto-isolator OP4N25 1 U2

Quad NAND CMOS 4011 1 U3

OPTICAL RECEIVER RX179AT 2 U4, U5

HEX Inverter 74VHC14 2 U6, U15

PY990 Dual 4-1 MUX 74VHC153 1 U7

PY990 Dual 4-1 MUX 74HCT153 1 U9

Quad OR Gates 74VHC32 1 U8

PY363 OPTICAL TRANSMITTER TX179AT 1 U10

PY980 SPDIF RX IC CS8416CZ 1 U11

PY979 SPDIF TXCIC CS8406CZ 1 U12

31U1004ZTSB235FB-PSDAPSD289Y

+15V REGULATOR 7815 4 U14, U22, U49, U51

-15V REGULATOR 7915 2 U16, U24

+5V REGULATOR 7805 6 U17, U25, U27, U29, U31, U36

PY986 +3.3V REGULATOR LM1117T_3.3 2 U18, U26

Quad Buer 74VHC125 1 U19

Quad Buer 74HCT125 1 U20

Reset IC DS1818 1 U21

Hex Inverter 74HCU04 1 U23

MAX202CSE 1 U28

PY988 +1.2V REGULATOR LT1963AET 1 U30

erawtfoShtiwmargorP23U1UT07NA200VB94TAMORhsalF589YP

OP-AMP single OPA842ID 4 U33, U34, U37, U38

OP-AMP balanced OPA1632DGN 2 U35, U39

OP-AMP dual OPA2134UA 6 U40, U41, U46, U50, U52, U53

PY987 REGULATOR LT1761ES5-BYP 2 U42, U44

PY987 2.8V REGULATOR LT1761ES5-2.8 2 U43, U45

-5V REGULATOR 7905 2 U47, U48

131U,031U2SRA5591DACAD189YP

detalpdlog

,tresniegnaro1NC1CE/41-4.8-2VAlatnozirohlaudtekcoSonohP

Diodes

Integrated Circuits

Connectors

Transistors

Note: resistors, capaciotrs and other'generic' electronic componetents are

not usually stocked by the manufacturer. Please obtain these locally.

AP19132/6

setoNtnedItnenopmoCytQoNtraPyrotcaFnoitpircseDeulaVoNtraPPA

Cambridge Audio Azur 840C DAC PCB Assembly BOM

2NC1elgnAthgiRBCPepyTDyaW9

detalpdlog,tresnikcalb5NC-3NC3SE8-4.8-VAelgnistekcoSonohP

6NC1redaeHlacitreV

yaW7x2

2MM 3W ST HEADER B3B-PH-KS 1 CN7

2MM 8W ST HEADER B9B-PH-KS 1 CN8

2MM 9W ST HEADER B9B-PH-KS 1 CN9

2,5MM 10W ST HEADER B10B-XH-A 1 CN10

Phono Socket vertical dual AV2-8.4-13EL 1 CN12 white insert (top)/red insert (bottom), gold

plated

epytgnihctal41NC,31NC2A2305elaMTKSRLX

3.5mm JACK SKT CKX-3.5-12 1 CN100

24.576MHz CH015M2457600-

AFHJ00 1X1

Am051=nimcdI4L-2L3Hu74

ME2-5S 3 RL1-RL3

3F1003-06HWesufyloPA0.3

5F,

4F,2F,1F4011-06HWesufyloPA1.1

Crystal

Inductor

Relay

Fuse

Note: resistors, capaciotrs and other'generic' electronic componetents are

not usually stocked by the manufacturer. Please obtain these locally.

Cambridge Audio Azur 840C CD Player

AP19125/3 Mains PCB Schematic

FU3

20MM T2AL

BLUE

TO VOLTAGE SELECTOR PCB

X2 47N SUPPRESSION

1N X1/Y1 C&C

SWITCH 1

SWITCH 2

TO ON/OFF SWITCH

PAD EMC M3

10U 5A T68-2A MAINS

CN3

IEC PCB MOUNT

Rong Feng

SS-7B-1

CN1

2,5MM 8W ST HEADER

RL1:C

RELAY

2RL1:A

RELAY

RL1:B

RELAY

2RL2:A

RELAY

5RL2:B

RELAY

RL2:C

RELAY

ANALOG A +

ANALOG A -

ANALOG B +

ANALOG B -

GND A

GND B

DIGITAL +

DIG GND

ANALOG A +

ANALOG A -

ANALOG B +

ANALOG B -

GND A

GND B

DIGITAL +

DIG GND

RELAY 10V 1

CN2

2,5MM 10W ST HEADER

FROM TRANSFORMER

TO TRANSFORMER

TO DAC OCB

TRANSISTOR COLLECTOR

To enhance viewing, please print to A3 38

Cambridge Audio Azur 840C CD Player

AP19125/3 Mains PCB Board Layout (Top Side)

To enhance viewing, please print to A3 39

Cambridge Audio Azur 840C CD Player

AP19125/3 Mains PCB Board Layout (Bottom Side)

To enhance viewing, please print to A3 40

AP19128/2

AP Part No Value Description Qty Component

Ident

Factory Part

No. Notes

1n X1/Y1 10mm pitch Polyester Capacitor 2 C1, C2

hctiPmm513C1roticapaCretseyloPhctipmm512XN74

IEC-SOCKET 3 Way IEC Connector 1 CN3 2336-003910-002

B10B-XH-A JST 10 Way 2.54mm 1 CN2

B8B-XH-A JST 8 Way 2.54mm 1 CN1

AP13570/1 10uH 5A Mains Inductor 2 L1, L2 T68-2A 32.5 Turns with UL

Heatsink

2LR,1LR211-EMV5yaleR50011-EM

T2AL 2A slow blow fuse 20mm LBC (low

breaking capacity) 1 FU3 4030-618002-001

20MM Fuse Holder 3 FU3 4034-000030-000

100-001050-13043U

F3revoCesuF

CAPACITORS

CONNECTORS

MISCELLANEOUS

Cambridge Audio Azur 840C CD Player Mains PCB BOM

Note: resistors, capacitors and other 'generic' electronic components are

not usually stocked by the manufacturer. Please obtain these locally.

Cambridge Audio Azur 840C CD player IC Pin Layout

Details

TA2153FN

Servo PCB (U1)

TC9462FG

Servo PCB (U2)

MCU TMP87EP26F-1J15

Servo PCB (U3)

TA2092N

Servo PCB (U6)

7808

Servo PCB (U7)

7805

Servo PCB (U8)

DAC PCB (U17, U25, U27, U29, U31 & U36)

C8050D

Servo PCB (Q7, Q8, Q11 & Q12)

9014C

Servo PCB (Q13)

C8550

Servo PCB (Q9 & Q10)

9015C

Servo PCB (Q1)

TSOP1836SS3V

Front Panel PCB (U1)

PIC16F877A-I/P

Front Panel PCB (U2)

DS18030-050

Front Panel PCB (U3)

PIC12C508A-I/P

Front Panel PCB (U4)

BA6218

Front Panel PCB (U5)

BC337

Front Panel PCB (Q1, Q2, Q3 & Q4)

TSOP1836

DAC PCB (U1)

OP4N25

DAC PCB (U2)

4011

DAC PCB (U3)

RX179AT

DAC PCB (U4 & U5)

74VHC14

DAC PCB (U6 & U15)

74VHC153

DAC PCB (U7)

74HCT153

DAC PCB (U9)

74VHC32

DAC PCB (U8)

TX179AT

DAC PCB (U10)

CS8416CZ

DAC PCB (U11)

CS8406CZ

DAC PCB (U12)

ADSP-BF532BSTZ400

DAC PCB (U13)

7815

DAC PCB (U14, U22, U49 & U51)

7915

DAC PCB (U16 & U24)

LM1117T_3.3

DAC PCB (U18 & U26)

74VHC125

DAC PCB (U19)

74HCT125

DAC PCB (U20)

DS1818

DAC PCB (U21)

74HCU04

DAC PCB (U23)

MAX202CSE

DAC PCB (U28)

LT1963AET

DAC PCB (U30)

AT49BV002AN70TU

DAC PCB (U32)

OPA8421D

DAC PCB (U33, U34, U37 & U38)

OPA1632DGN

DAC PCB (U35 & U39)

OPA2134UA

DAC PCB (U40, U41, U46, U50, U52 & U53)

LT1761ES5-BYP

DAC PCB (U42 & U44)

LT1761ES5-2.8

DAC PCB (U43 & U45)

7905

DAC PCB (U47 & U48)

AD1955ARS

DAC PCB (U130 & U131)

BC807-25

DAC PCB (Q2, Q3, Q5, Q7, Q8 & Q9)

MPSA14

DAC PCB (Q4 & Q6)

TIP31

DAC PCB (Q10 & Q11)

BC817-25

DAC PCB (Q1, Q12, Q13, Q17 & Q18)

Circuit Description

To Follow.

AP21487/1

Azur 840C CD Player

Upgrade Software Instructions

Cambridge Audio

Gallery Court

Hankey Place

London SE1 4BB

England

www.cambridge-audio.com

Introduction

The following instructions are a step-by-step guide on how to upgrade the DSP (Digital

Signal Processor) chip (Type is Analog Devices ADSP-BF532BSTZ400 and ident on

PCB is U13) and the PIC Microcontroller chip (Type is Microchip PIC16F877A-I/P and

ident on PCB is U2), inside the 840C CD Player.

Equipment Required

1 x 840C CD Player with mains lead.

1 x Desktop PC or Laptop with Windows XP Service Pack 2 installed, and with one 9

way D-Type serial communications port free.

1 x 9 way female-female D-Type Null Modem Cable. Example cable to use is:

Product Code 976-880 from Farnell (http://uk.farnell.com). Pin layout and

example cable pictures are shown below.

Pin Layout

Example Cable

1 x 840C Loader Program installed on PC or

Laptop (840C Loader Program.zip).

1 x Latest 840C DSP Software (AP20059X 740C-840C DSP software upload file

VX.X (6.1.ZZ).bin).

1 x Latest 840C PIC Software (AP20058X 840C VX.X.HEX).

Note: All the required software can be found on the Service Extranet. Please

download and save all software onto your PC or Laptop Hard Drive.

Checking Software Version

Before you start, you need to make a note of the current version of software installed in

the 840C. To do this:

1. Connect the 840C to the mains supply using an IEC power cord, making sure the

voltage selector switch is set to the correct voltage for your local mains supply.

2. Switch the 840C on using the Power On/Off switch on the rear panel and the

Standby/On button on the front panel.

3. When the 840C has switched on and is ready to be used (i.e. “No Disc” is

displayed on the front panel LCD), press the “Menu” button on the front panel 4

times until “SOFTWARE VERSION XX / YYY / Z.Z” is displayed on the front

panel LCD. XX is the DSP version number, YYY is the DSP build number and

Z.Z is the PIC version number. Note down the full software version number.

4. Switch the 840C off using the Power On/Off switch on the rear panel.

Upgrade Instructions – PIC Software

To upgrade the 840C software, please carry out the following:

1. Install the 840C Loader Program onto your PC or Laptop (by following the on

screen instructions), by unpacking 840C Loader Program.zip and running

setup.exe. Make sure the Loader Program is not running before continuing.

2. Connect one end of the Null Modem cable to a 9 way D-Type spare socket on

the PC or Laptop.

3. Connect the other end of the Null Modem cable to the RS232C port on the back

of the 840C.

4. Switch the 840C on using the Power On/Off switch on the rear panel, while

pressing and holding the Standby/On button on the front panel. This will then

display “DOWNLOAD!” on the front panel LCD. This means the 840C is ready to

receive new software.

5. Load the 840C loader software on your PC or Laptop by pressing “Start”,

“Programs”, “840C” then select the “Loader” icon to start up the loader software.

6. The picture below shows the first screen that appears on your PC screen. Select

the number of the communications (Comm) port that you plugged the Null

Modem into on your PC or Laptop, then press “OK”.

7. The window that now appears is shown below.

8. If the wrong comm port is selected, please close down the software and repeat

the process, from step 6, above.

9. Select the “Load File” button corresponding to “PIC Software Download.”

10. This will then bring up a browse menu. Please locate the latest PIC software

(the file extension is .HEX) for the 840C and press “Open.”

11. The loader window will now display “File Loaded – VX.X,” where X.X is the

version number, as shown below.

12. Now press the “Download Code” button corresponding to “PIC Software

Download” to start the process. “Programming PIC Processor…” will now

display on the PC screen and the progress bar will start to move. Also “Loading

PIC…” will be displayed on the 840C front panel LCD.

13. When the process is complete, the program will display the following:

Also, the 840C will return to its Standby mode.

14. If at any time during the process, there is a failure, an error message will be

displayed. If this occurs, please repeat the steps above. If the problem persists,

please seek advice from our servicing department.

15. Switch the unit off via the On/Off switch on the rear panel.

The PIC has been successfully updated.

Upgrade Instructions – DSP Software

1. Make sure the 840C is switched off.

2. Repeat steps 1 to 9 for the PIC software above. Note: Please skip step 1 if you

already have the PC/Laptop installer program installed. Also make sure you

press and hold the Standby/On button while switching on the 840C via the

On/Off switch on the rear panel.

3. Select the “Load File” button corresponding to “DSP Software Download.”

4. This will then bring up a browse menu. Please locate the latest DSP software

(the file extension is .BIN) for the 840C and press “Open.”

5. The loader window will now display “File Loaded!” as shown below.

6. Now press the “Download Code” button corresponding to “DSP Software

Download” to start the process. “Programming DSP…” will now display on the

screen and the progress bar will start to move. Also “Loading DSP…” will be

displayed on the 840C front panel LCD.

7. When the process is complete, the program will display the following:

Also, the 840C will return to its Standby mode.

8. If at any time during the process, there is a failure, an error message will be

displayed. If this occurs, please repeat the steps above. If the problem persists,

please seek advice from our servicing department.

Testing

1. Repeat the procedure “Checking Software Version” above and note the new

software version. This should be the same number as the numbers located on

the file names of the HEX and BIN files. In this example the HEX version is 1.1

(see item 10 PIC picture above) and BIN build version is 065 (see item 4 DSP

picture above).

2. Switch the unit off via the On/Off switch on the rear panel.

3. Remove 9 way D-Type Null Modem cable from the 840C.

4. Switch the unit on and place a CD in the tray.

5. Close the CD tray and play the CD.

6 Test all front panel buttons and audio outputs. If the unit is functioning correctly,

then the upgrade is complete.

The DSP has been successfully updated.

The process is now complete.

AP211841 Cambridge Azur 840C CD Player Service Manual Audio SM

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