Cambridge Audio Azur 540A V2.0 Manuel utilisateur

Gallery Court Hankey Place London SE1 4BB UK

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

540A V2

Issue Date: 31st March 2006

_________________________________________________________________________________________

SERVICE MANUAL

_________________________________________________________________________________________

SPECIFICATIONS:

Power Output 60W (into 8Ω)

90W(into4Ω)

THD (unweighted) <0.002% @ 1kHz, of rated power

<0.070% 20Hz – 20kHz, of rated power

<0.025% 20Hz – 20kHz @ 10w

Frequency response (-1dB) 5Hz – 50kHz

S/N ratio (ref 1w) >85dB

Input impedances 47kohms

Power Amp damping factor >100

Max power consumption 650w

Min/On power consumption <35w (no signal)

Standby power consumption <10w

Bass / Treble controls Shelving, ultimate boost/cut + /-7.5dB

@ 20Hz and 20kHz

Dimensions 100 x 430 x 310mm

(3.9 x 16.9 x 12.2”)

Weight 7.4kg (16.3Lbs)

AP19973/1

540A V2.0 SERVICE MANUAL

TABLE OF CONTENTS

Safety Precautions & Important Notes 3

Exploded Diagram 4

Input PCB Schematic (Power Supply) 5

Input PCB Schematic (Buffers and Switches) 6

Input PCB Schematic (Tone Control) 7

Input PCB Schematic (Protection Circuitry) 8

Input PCB Schematic (Headphone Driver) 9

Input PCB Layout (Top Side) 10

Input PCB Layout (Bottom Side) 11

InputPCBAssemblyBOM 12-13

Voltage Select Switch PCB Schematic 14

Voltage Select PCB Layout (Top Side) 15

Voltage Select PCB Layout (Bottom Side) 16

Voltage Select PCB Assembly BOM 17

MainsPCBSchematic 18

Front Panel PCB Schematic 19

Mains & Front Panel PCB Layout (Top Side) 20

Mains & Front Panel PCB Layout (Bottom Side) 21

Mains & Front Panel PCB Assembly BOM 22

Amp PCB Schematic (Right Channel) 23

AmpPCBSchematic(Protection) 24

AmpPCBSchematic(PowerAmp) 25

Amp PCB Schematic (Left Channel) 26

Amp PCB Layout (Top Side) 27

Amp PCB Layout (Bottom Side) 28

AmpPCBAssemblyBOM 29-31

AbusModulePCBSchematic 32

Abus Module PCB Layout (Top Side) 33

Abus Module PCB Layout (Bottom Side) 34

Abus PCB Assembly BOM 35

IC Pin Layout Details 36-42

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.

18 (a)

19 (b)

20 22

24 5

15 11 9

Drawing ref AP Part Factory part number Description

1 PY687 6560-150001-000A VOLUME KNOB ALUMINIUM SKIN AP133601 SILVER (use with PY680+PY681)

1 PY686 6560-150001-000 VOLUME KNOB ALUMINIUM SKIN AP133601 BLACK (use with PY680+PY681)

2 PY592 6050-150004-002-02 Azur-640A SELECTOR KNOB SILVER

2 PY593 6050-150004-002-01 Azur-640A SELECTOR KNOB BLACK

3 PY719 6050-150012-000-01 7MM TAC SWITCH BUTTON (BLACK)

3 PY720 6050-150012-000A01 7MM TAC SWITCH BUTTON (SILVER)

4 6050-150013-000A01 7MM PUSH SWITCH BUTTON SILVER FOR Azur-640A

4 6050-150013-000 7MM PUSH SWITCH BUTTON BLACK FOR Azur-640A

5 6050-117821-000-02 Azur-640A CONTROL BOX BUTTON SILVER

5 6050-117821-000-01 Azur-640A CONTROL BOX BUTTON BLACK

6 PY541 6050-150010-000A01 PLASTIC FOOT SILVER

6 PY531 6050-150010-000 PLASTIC FOOT BLACK

7 PY544 6600-170100-000 FOOT PAD FOR AZUR RANGE

8 PY1058 3200-076771E000 115/230V 30V*2/3A 17V*2/0.4A Azur-540A V2 AP175704

9 PY1032 6550-150017-001-02 LARGER SIDE PANEL SILVER PAINTED

9 PY1033 6550-150017-001-01 LARGER SIDE PANEL BLACK PAINTED

10 PY1034 6550-150037-000-02 V2 AMP TOP PANEL SILVER PAINTED

10 PY1035 6550-150037-000-01 V2 AMP TOP PANEL BLACK PAINTED

11 PY1036 8554-015010-701 LARGER SUPPORT FRONT ASSY (WITH TWO BRASS INSERTS)

12 PY1037 8554-015020-701 LARGER SUPPORT REAR ASSY (WITH TWO BRASS INSERTS)

13 PY1059 8554-015001-302 Azur-540A V2-Silver AMP FRONT PANEL ASSY

13 PY1060 8554-015011-302 Azur-540A V2-Black AMP FRONT PANEL ASSY

14 PY1040 9464-015002-041 Azur-640A/540A V2 PIC CONTROL BOARD ASSY REV A

15 PY1041 9464-015002-171 Azur-640A/540A V2 POWER SWITCH PCB REV A

PY1042 9464-015002-191 Azur-640A/540A V2 LED PCB ASSY REV A

16 PY1061 9454-015002-071 Azur-540A V2 POWER INPUT BOARD ASSY REV A

17 PY1062 9454-015002-091 Azur-540A V2 AMP POWER PCB ASSY REV A

18 PY1045 9464-015002-001 640A/540A V2 PROTECTION CIRCUITRY PCB-A ASSY REV A

19 PY1046 9464-015002-101 640A/540A V2 PROTECTION CIRCUITRY PCB-B ASSY REV A

20 PY1047 9464-015002-331 Azur-640A/540A A-Bus hub PCB ASSY REV A

21 PY1048 9464-015002-341 Azur-640A/540A V2 INPUT PCB ASSY REV A

22 PY1049 9464-015002-541 Azur-540A/640A V2 SPEAKER CONN. BOARD ASSY REV A

23 PY944 9805-054010-001 AZUR-540A/C,640A/C V2.0 REMOTE CONTROL ASSY REV A

PY945 6040-150002-000-01 BATTERY-DOOR FOR Azur R/C BLACK PAINTED

24 PY1056 6550-150021E001A03 AZUR 540A V2.0 FRONT PANEL-Silver (Metal only)

24 PY1054 6550-150021E001-03 AZUR 540A V2.0 FRONT PANEL-Black (Metal only)

25 PY515 7002-608010-001 Screw M2.6 x 8 M/C Torx Recessed 1/K Head Black

25 PY516 7002-608010-006 Screw M2.6 x 8 M/C Torx Recessed 1/K Head En-Plated

PY1051 5100-641500E300 AZUR 540A/640A V2 USER'S MANUAL (AP183031)

To enhance viewing, please print to A3 4

Cambridge Audio Azur 540A V2.0 Amplifier

AP17649/5 Input PCB Schematic (Power Supply)

1VO 3

GND

U3 L7805

C26

47u 16V

1VO 3

GND

L7815

2VO 3

GND

L7915

+5V

DGND

1N4004

C35

100N 100V X7R

C37

100N 100V X7R

C27

100N 50V X7R

C25

100N 50V X7R

C31

47N PE 63V

C34

47N PE 63V

C30

47N PE 63V

C29

47N PE 63V

C28

100U 25V EL 105

C98

100U 25V EL 105

GENERAL NOTES

CN8

3,96MM 3W ST HEADER

C36

100N 100V X7R

Unreg for Relays LK40

LK10MM

Main

+15V

-15V

LK86

LINK10MM

LK83

LINK10MM

LK79

LINK10MM

LK75

LINK10MM

LK71

LINK10MM

LK63

LINK10MM

LK67

LINK10MM

-15V

LK82

LINK10MM

LK78

LINK10MM

LK74

LINK10MM

LK70

LINK10MM

LK64

LINK10MM

LK66

LINK10MM

+15V

LK88

LINK10MM

LK47

LINK10MM

LK44

LINK10MM

LK41

LINK15MM

LK42

LINK15MM

+15V

-15V

LK13

LINK10MM

LK6

LINK15MM

LK7

LINK15MM

LK12

LINK15MM

LK17

LINK15MM

LK23

LINK10MM

LK26

LINK10MM

LK28

LINK10MM

LK22

LINK10MM

LK29

LINK10MM

LK30

LINK10MM

LK32

LINK15MM

LK31

LINK10MM

LK34

LINK15MM

C32

1000U 35V EL

C33

1000U 35V EL

LK50

LINK15MM

LK48

LINK15MM

AC Sense

R55

4k7

C38

1U 25V

1N4004

R56

4k7

BC327

R114

4k7

+5V

PIC Standby Relay

Standby Relay

Main

LK98

LINK10MM

TERMINAL

Main Main

Rev2: D8 Removed, LK105 and 106 added.

LK105

LK10MM

LK106

LK10MM

1N4004

D10

1N4004

Rev4: D9 and D10 added.

C38

1U 25V

R56

4k7

BC327

R114

4k7

+5V

PIC Standby Relay

Standby Relay

LK105

LK10MM

LK106

LK10MM

1N4148

Revision 1

86-756-8687998

To enhance viewing, please print to A3 5

Cambridge Audio Azur 540A V2.0 Amplifier

AP17649/5 Input PCB Schematic (Buffer and Switches)

Abus GND

GENERAL NOTES

8 4

U9:A

NE5532N

R112 220R 1/8W

R111 220R 1/8W

U9:B

NE5532N

8 4

U12:A

NE5532N

U12:B

NE5532N

-15V

+15V

-15V

+15V

-15V

SW GND

LCh In

RCh In

LCh Out

RCh Out

Vss

L-S1

L-S2

L-S3

L-COM1

L-S4

L-S5

L-S6

L-COM2

L-S7

L-S8

L-COM3

GND

Vdd 28

R-S1 27

R-S2 26

R-S3 25

R-COM1 24

R-S4 23

R-S5 22

R-S6 21

R-COM2 20

R-S7 19

R-S8 18

R-COM3 17

DATA 16

CLK 15

U11

TC9163AF

CN14:D

AV4-8,4-9

CN13:B

AV4-8,4-9

CN13:D

AV4-8,4-9

Aux

DAB

DVD

TO1

TO2

CN12:B

AV4-8,4-9

CN12:D

AV4-8,4-9

CN15:B

AV4-8,4-9

PreOut Left

PreOut Right

PreOut Left

PreOut Right

CN15:D

AV4-8,4-9

CN16:A

AV2-8,4-9

SW GND

CN16:B

AV2-8,4-9

U14:A

NE5532N

-15V

+15V

C67

47n 63V PE

C68

47n 63V PE

R96

47k 1/8W

U13:A

NE5532N

R93

47k 1/8W

U15:A

NE5532N

-15V

+15V

C71

47n 63V PE

C72

47n 63V PE

R89

47k 1/8W

U16:A

NE5532N

R85

47k 1/8W

U17:A

NE5532N

-15V +15V

C76

47n 63V PE

C75

47n 63V PE

R81

47k 1/8W

U18:A

NE5532N

R73

47k 1/8W

U13:B

NE5532N

-15V

+15V

C70

47n 63V PE

C69

47n 63V PE

R91

47k 1/8W

U14:B

NE5532N

R95

47k 1/8W

U16:B

NE5532N

-15V

C74

47n 63V PE

C73

47n 63V PE

R83

47k 1/8W

U15:B

NE5532N

R87

47k 1/8W

U18:B

NE5532N

-15V

+15V

C44

47n 63V PE

C45

47n 63V PE

R110

47k 1/8W

U17:B

NE5532N

R79

47k 1/8W

C91

47N PE 63V

C92 47N PE 63V

C41

47N 63V PE

C42

47N 63V PE

R104

1k8

R105

1k8

R103

1k8

R102

1k8

C90

10P 50V NPO

C93

10P 50V NPO

R99

100R

R98

100R

C88

100N 50V X7R

C89

100N 50V X7R

R109

1k 1/8W

R78

1k 1/8W

R82

1k 1/8W

R86

1k 1/8W

R90

1k 1/8W

R94

1k 1/8W

R97

1k 1/8W

R92

1k 1/8W

R88

1k 1/8W

R84

1k 1/8W R80

1k 1/8W

R72

1k 1/8W

C83

100p 50V NP0

C48

100p 50V NP0

C53

100p 50V NP0

C57

100p 50V NP0

C61

100p 50V NP0

C65

100p 50V NP0

C66

100p 50V NP0

C62

100p 50V NP0

C58

100p 50V NP0 C54

100p 50V NP0

C50

100p 50V NP0

C46

100p 50V NP0

R75

220R 1/8W

R76

220R 1/8W

R74

220R 1/8W

R77

220R 1/8W

CN14:B

AV4-8,4-9

CN14:A

AV4-8,4-9

CN14:C

AV4-8,4-9

CN13:A

AV4-8,4-9

CN13:C

AV4-8,4-9

CN12:A

AV4-8,4-9

CN12:C

AV4-8,4-9

CN15:A

AV4-8,4-9

CN15:C

AV4-8,4-9

LK60

LINK15MM

LK51

LK15MM

+15V

C64

10U NP 16V

C63

10U NP 16V

C60

10U NP 16V

C59

10U NP 16V

C56

10U NP 16V

C55

10U NP 16V

C52

10U NP 16V

C51

10U NP 16V

C49

10U NP 16V

C47

10U NP 16V

C81

10U NP 16V

C82

10U NP 16V

LK62 LK10MM

LK57

LK10MM

LK56

LK15MM

LK53

LK15MM

LK55 LK10MM

LK54

LK10MM

LK92

LK10MM

LK90

LK15MM

LK91

LK15MM

LK9

LK15MM

LK8

LK15MM

LK89

LK15MM

LK99

LK15MM

LK97 LK10MM

LK93

LK10MM

LK94

LK10MM

R100

470k

R101

470k

LK95

LK10MM

LK96

LINK15MM

LCh HP Out

RCh HP Out

LK5 LK15MM

LK43 LK15MM

CN10

2,5MM 3W ST HEADER

ABUS Audio Out

R106

560R

R107

560R

CN5

2,5MM 7W ST HEADER

To PIC

Clock

Data

Strobe

DGnd from PIC

Control Bus IR

ABUS IR

Amp Mute

Control Bus IR

ABUS IR

ABUS Status

RCh

GND

LCh

CN9

2,5MM 5W ST HEADER

ABUS Control Signals

ABUS PCB DGnd

LK101

LK10MM

C87

1N 50V NP0

TERMINAL

R113

47R no stuff

C86

1N 50V NP0 no stuff

TERMINAL

C80

100p 50V NP0

C78

100p 50V NP0

C77

100p 50V NP0

C79

100p 50V NP0 U6

C85

100P 50V NP0

C84

100P 50V NP0

U10:A

NE5532N

-15V

+15V

C40

47n 63V PE

C39

47n 63V PE

U6 U6

U10:B

NE5532N

LK49

LK15MM

LK52

LINK15MM

LK58

LK10MM

LK61

LK10MM

LK59

LINK15MM

ABUS PCB +5V +5VOLTS

LK100

LK15MM

LK85

LK10MM

LK87

LK10MM

LK68

LK10MM

LK69

LK10MM

LK73

LK10MM

LK77

LK10MM

LK81

LK10MM

LK84

LK10MM

LK80

LK10MM

LK76

LK10MM

LK72

LK10MM LK65

LK10MM

R58 1k8

R59 1k8

TERMINAL

R61

3k6

R60

3k6

Rev1: Resistors R72,78,80,82,84,86,88,90,92,94,97,109 changed to 75R

GND Links on underside

Amp Mute

Standby Relay

Rev4: Resistors R72,78,80,82,84,86,88,90,92,94,97,109 changed to 1k

86-756-8687998

To enhance viewing, please print to A3 6

Cambridge Audio Azur 540A V2.0 Amplifier

AP17649/5 Input PCB Schematic (Tone Control)

GENERAL NOTES

R20

4k7

R23

1k1

R24

1k1

R17

2k2

R19

2k2

SW2:A

SW-DPDT

Tone Defeat Out

-15V

+15V

R36

2k2

R35

2k2

R22

4k7

R26

1k1

R25

1k1

R18

2k2

R21

2k2

SW2:B

SW-DPDT

Tone Defeat

-15V

+15V

R37

2k2

R38

2k2

out

Out

-15V

+15V

U4U4

OutOut

+15V

-15V

8 4

U6:A

NE5532N

U6:B

NE5532N

8 4

U5:A

NE5532N

U5:B

NE5532N

U2 6

U7:B

NE5532N

U7:A

NE5532N

RCh In

LCh In

RCh Out

LCh Out

R15

150k

R14

150k

R16

150k

R13

150k

4 6

VR3:B

20K MOTORISED DUAL POT

1 3

VR3:A

20K MOTORISED DUAL POT

4 6

VR4:B

MN20K BALANCE

VR4:A

MN20K BALANCE

VR2:A

B5K LINEAR

VR2:B

B5K LINEAR

VR1:A

B5K LINEAR

VR1:B

B5K LINEAR

CN3

H6 2.54mm

TO POWER AMP

47U NP 16V

C11

47U NP 16V

C7 47U NP 16V

RCh Out

LCh Out

C103

47N 63V PE

C102

47N 63V PE

C14

47N 63V PE

C16

47N 63V PE

C10

47N 63V PE

C18

10P 50V NPO

C23

10P 50V NPO

C13

10P 50V NPO

C19

1N5 63V PE

C20

1N5 63V PE

C22

680N 63V PE

C21

680N 63V PE

LK37

LK15MM

LK25

LK10MM

LK24

LK10MM

LK21

LK15MM

LK19

LK15MM

R33

22R

R34

22R

LK35

LINK15MM

LK20

LK15MM

LK27

LK10MM

LK18

LK15MM

R29

22k

R31

22k

Out

10N PP 63V

C12

10N PP 63V

C24 10N PP 63V

C104

10U NP 16V

C101

10U NP 16V

C105

10N PP 63V

C100

10N PP 63V

LK36

LINK15MM

R32

1k5

R30

Out

R27

1k5

R28

Out

C106

10P 50V NPO

C99

10P 50V NPO

C15

100U 25V EL

C17

100U 25V EL

LK33

LK15MM

TERMINAL

CN17

2MM 2W ST HEADER

RL1:B

ME2-5S

RL1:C

ME2-5S

RL1:A

ME2-5S

+5VOLTS

1N4004

MPSA14

R122

10k

R123

MAIN

Amp Mute

Rev2: RL1,D8,Q9,R122,R123,LK104,107-109 added.

LK16

LK10MM

LK104

LK10MM

LK107

LK10MM

LK108

LK15MM

LK109

LK15MM

86-756-8687998

To enhance viewing, please print to A3 7

Cambridge Audio Azur 540A V2.0 Amplifier

AP17649/5 Input PCB Schematic (Protection Circuitry)

+5Volts

R66

For 1mA

R64

10k

R67

100R

R65

2R7

DGND

U8:A

LM393 D7

1N4148

+5V

Speaker short circuit tester

R69

4k7

(Open Collector Output)

Senses a DC resistance of 2 ohms or less

1N4004

PIC VI/Short

C43

100N 50V X7R

Speaker Test

DGND

+5V

SW1:B

SW-DPDT

TAPE

SPEAKER B SWITCHING (for relay)

Speaker Test

Speaker A Relay

Unreg for Relays

CN11

2,5MM 6W ST HEADER

To Speaker PCB CN1

PIC Standby Relay

Unreg for Relays

DGND

CN7

2,5MM 3W ST HEADER

R57

220R 2W Carbon

R108

220R 2W Carbon

PIC VI/Short

PIC DC

PIC CLIP

PIC Temp

Speaker A Relay

PIC Standby Relay

CN6

2,5MM 8W ST HEADER

To PIC

GENERAL NOTES

Mains PCB Control

Speaker PCB Control

PIC Protection signals

Speaker Cable Short Circuit Detector

LK103

LK10MM

LK14

LK10MM

LK15

LK10MM

U8:B

LM393

LK102

LK10

LINK15MM

LK46

LK11

LINK15MM

LK45

LK10MM

CN4

2,5MM 5W ST HEADER

DGND

PIC VI/Short

PIC DC

PIC CLIP

Temp Sense

R116

10k

R115

10k

DGND

+5V

PIC Temp

R63

910R

910 / (910 + 10k) with ZP221A501E

voltage gives 100deg C cutout

+5Volts

Temp Sense

R71

4k7

R70

10k R117

4k7

Open Collector Output

BC337 LK39

LK10MM

LK38

R68

100k

R62

no stuff

C108

100N 50V X7R

C107

100U 16V EL

DGND

+5V

Rev3: R65 Changed from 10R to 8R2

Rev4: R65 Changed from 8R2 to 4R7

Rev5: R65 Changed from 4R7 to 2R7

86-756-8687998

To enhance viewing, please print to A3 8

Cambridge Audio Azur 540A V2.0 Amplifier

AP17649/5 Input PCB Schematic (Headphone Driver)

Main

+15V

-15V

R54

10R

R53

10R

U1:B

NE5532N

R41

2k7

R40

3k3

R43

560R

R42

560R

R39

5k6

BD139

BD140

180R

Main

RSW1

RSW2

GND

CN1

HEADPHONE JACK

Main

C96

47N 63V PE

C95

47N 63V PE

U1:A

NE5532N

R46

2k7

R45

3k3

R48

560R

R47

560R

R44

5k6

BD139

BD140

180R

Main

GENERAL NOTES

R11

10R 2W

R12

10R 2W

RCh HP Out

R52

100R

R51

No Stuff

Main

LCh HP Out

R49

100R

R50

No Stuff

Main

C97

470U 25V EL

C94

470U 25V EL

360R

R10

360R

10N 63V PE

Main

LK2

LINK10MM

LK1

LINK10MM

LK3

LINK10MM

LK4

LINK10MM

CN2

2,5MM 2W ST HEADER

R118

1k5

R119

R120

1k5

R121

Main

Rev1: Resistors R118-121 added

(Rch Out)

(Lch Out)

Rev2: Resistors R11,R12,R118-121 values changed.

86-756-8687998

To enhance viewing, please print to A3 9

Cambridge Audio Azur 540A V2.0 Amplifier

AP17649/4 Input PCB Board Layout (Top Side)

Super Hi-Fideli ty Ultra Linear Preamp Stage

86-756-8687998

To enhance viewing, please print to A3 10

Ce manuel convient aux modèles suivants

Table des matières

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