Cambridge Audio Azur 540A V2 Service Manual

540A V2

Issue Date: 31 st March 2006

_________________________________________________________________________________________

SERVICE MANUAL

_________________________________________________________________________________________

SPECIFICATIONS:

60W )

90W (into 4 Ω )

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

<0.070% 20Hz – 20kHz, of rated power

<0.025%

Frequency response (-1dB) 5Hz – 50kHz

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

Power Amp damping factor

Max power consumption

Min/On power consumption

Standby power consumption

>100

650w

<35w (no signal)

<10w

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

@

Dimensions 100 x 430 x 310mm

(3.9

AP19973/1

Gallery Court Hankey Place London SE1 4BB UK

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

1

540A V2.0 SERVICE MANUAL

TABLE OF CONTENTS

Safety Precautions & Important Notes

Input PCB Schematic (Power Supply)

Input PCB Schematic (Buffers and Switches)

Input PCB Schematic (Tone Control)

Input PCB Schematic (Protection Circuitry)

Input PCB Schematic (Headphone Driver)

Input PCB Layout (Top Side)

Input PCB Layout (Bottom Side)

Input PCB Assembly BOM

Voltage

Mains PCB Schematic

Front Panel PCB Schematic

Voltage Select Switch PCB Schematic

Voltage Select PCB Layout (Top Side)

Voltage Select PCB Layout (Bottom Side)

Mains & Front Panel PCB Layout (Top Side)

Mains & Front Panel PCB Layout (Bottom Side)

Mains & Front Panel PCB Assembly BOM

Amp

Amp PCB Schematic (Protection)

Amp PCB Schematic (Power Amp)

Amp PCB Layout (Top Side)

Amp PCB Layout (Bottom Side)

Amp PCB Assembly BOM

Abus Module PCB Schematic

Abus

Abus Module PCB Layout (Top Side)

Abus Module PCB Layout (Bottom Side)

18

19

20

21

22

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25

32

33

34

27

28

29-31

3

5

6

7

8

9

10

11

12-13

14

15

16

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

COPYRIGHT NOTICE.

© 2005 Audio Partnership PLC. All rights reserved.

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.

3

20

21

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23

16

17

18

19

12

13

13

9

10

10

11

14

15

Drawing ref AP Part Factory part number

1

1

2

PY687

PY686

PY592

6560-150001-000A

6560-150001-000

6050-150004-002-02

2

3

3

4

4

PY593

PY719

PY720

6050-150004-002-01

6050-150012-000-01

6050-150012-000A01

6050-150013-000A01

6050-150013-000

7

8

9

6

6

5

5

24

24

25

25

PY541

PY531

PY544

PY1058

PY1032

PY1033

PY1034

PY1035

PY1036

PY1037

PY1059

PY1060

PY1040

PY1041

PY1042

PY1061

PY1062

PY1045

PY1046

PY1047

PY1048

PY1049

PY944

PY945

PY1056

PY1054

PY515

PY516

PY1051

6050-117821-000-02

6050-117821-000-01

6050-150010-000A01

6050-150010-000

6600-170100-000

3200-076771E000

6550-150017-001-02

6550-150017-001-01

6550-150037-000-02

6550-150037-000-01

8554-015010-701

8554-015020-701

8554-015001-302

8554-015011-302

9464-015002-041

9464-015002-171

9464-015002-191

9454-015002-071

9454-015002-091

9464-015002-001

9464-015002-101

9464-015002-331

9464-015002-341

9464-015002-541

9805-054010-001

Description

VOLUME KNOB ALUMINIUM SKIN AP133601 SILVER (use with PY680+PY681)

VOLUME KNOB ALUMINIUM SKIN AP133601 BLACK (use with PY680+PY681)

Azur-640A SELECTOR KNOB SILVER

Azur-640A SELECTOR KNOB BLACK

7MM TAC SWITCH BUTTON (BLACK)

7MM TAC SWITCH BUTTON (SILVER)

7MM PUSH SWITCH BUTTON SILVER FOR Azur-640A

7MM PUSH SWITCH BUTTON BLACK FOR Azur-640A

Azur-640A CONTROL BOX BUTTON SILVER

Azur-640A CONTROL BOX BUTTON BLACK

PLASTIC FOOT SILVER

PLASTIC FOOT BLACK

FOOT PAD FOR AZUR RANGE

115/230V 30V*2/3A 17V*2/0.4A Azur-540A V2

LARGER SIDE PANEL SILVER PAINTED

LARGER SIDE PANEL BLACK PAINTED

V2 AMP TOP PANEL SILVER PAINTED

V2 AMP TOP PANEL BLACK PAINTED

AP175704

LARGER SUPPORT FRONT ASSY (WITH TWO BRASS INSERTS)

LARGER SUPPORT REAR ASSY (WITH TWO BRASS INSERTS)

Azur-540A V2-Silver AMP FRONT PANEL ASSY

Azur-540A V2-Black AMP FRONT PANEL ASSY

Azur-640A/540A V2 PIC CONTROL BOARD ASSY REV A

Azur-640A/540A V2 POWER SWITCH PCB REV A

Azur-640A/540A V2 LED PCB ASSY REV A

Azur-540A V2 POWER INPUT BOARD ASSY REV A

Azur-540A V2 AMP POWER PCB ASSY REV A

640A/540A V2 PROTECTION CIRCUITRY PCB-A ASSY REV A

640A/540A V2 PROTECTION CIRCUITRY PCB-B ASSY REV A

6040-150002-000-01

6550-150021E001A03

BATTERY-DOOR FOR Azur R/C BLACK PAINTED

AZUR 540A V2.0 FRONT PANEL-Silver (Metal only)

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

7002-608010-001

7002-608010-006

5100-641500E300

Azur-640A/540A A-Bus hub PCB ASSY REV A

Azur-640A/540A V2 INPUT PCB ASSY REV A

Azur-540A/640A V2 SPEAKER CONN. BOARD ASSY REV A

AZUR-540A/C,640A/C V2.0 REMOTE CONTROL ASSY REV A

Screw M2.6 x 8 M/C Torx Recessed 1/K Head Black

Screw M2.6 x 8 M/C Torx Recessed 1/K Head En-Plated

AZUR 540A/640A V2 USER'S MANUAL (AP183031)

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15

4

5

11 9

21

10

25

To enhance viewing, please print to A3

1 2 3 6 7

14

20 22

18 (a)

19 (b)

17

8

16

12

23

4

Cambridge Audio Azur 540A V2.0 Amplifier

CN8

1

2

3

3,96MM 3W ST HEADER

LK50

LINK15MM

LK86

LINK10MM

LK83

LINK10MM

LK79

LINK10MM

LK75

LINK10MM

LK71

LINK10MM

LK63

LINK10MM

LK67

LINK10MM

C35

100N 100V X7R

C36

100N 100V X7R

C37

100N 100V X7R

LK48

LINK15MM

LK82

LINK10MM

LK78

LINK10MM

LK74

LINK10MM

LK70

LINK10MM

LK64

LINK10MM

LK66

LINK10MM

LK88

LINK10MM

D2

1N4004

AC Sense

D1

1N4004

D3

1N4004

Main

R55

4k7

Unreg for Relays

PIC Standby Relay

R56

4k7

C38

1U 25V

C32

1000U 35V EL

+5V

R114

4k7

LK105

LK10MM

Standby Relay

Q7

BC327

LK106

LK10MM

1

U3

VI

C27

100N 50V X7R

L7805

VO

3

C25

100N 50V X7R

C26

47u 16V

+5V

LK40

LK10MM

1

U4

L7815

VI

C31

47N PE 63V

VO

DGND

3

C30

47N PE 63V

C28

100U 25V EL 105

D4

1N4004

D5

1N4004

Main

LK34

LINK15MM

LK31

LINK10MM

LK29

LINK10MM

LK22

LINK10MM

LK6

LINK15MM

LK13

LINK10MM

LK41

LINK15MM

LK47

LINK10MM

C33

1000U 35V EL C34

47N PE 63V

2

VI

U2

L7915

LK32

LINK15MM

LK30

LINK10MM

LK28

LINK10MM

LK26

LINK10MM

LK23

LINK10MM

LK7

LINK15MM

LK42

LINK15MM

LK44

LINK10MM

VO

3

C29

47N PE 63V

Main

LK98

LINK10MM

LK12

LINK15MM

LK17

LINK15MM

C98

100U 25V EL 105

Main

D9

1N4004

J7

D10

1N4004

TERMINAL

PIC Standby Relay

R56

4k7

C38

1U 25V

+5V

D8

1N4148

R114

4k7

LK105

LK10MM

Standby Relay

Q7

BC327

LK106

LK10MM

Revision 1

GENERAL NOTES

1.

2.

3.

4.

5.

Rev2: D8 Removed, LK105 and 106 added.

Rev4: D9 and D10 added.


AP17649/5 Input PCB Schematic (Power Supply)

5

86-756-8687998


R113

47R no stuff

C86

1N 50V NP0 no stuff

J2

L

TERMINAL

CN16:B

AV2-8,4-9

CN15:D

AV4-8,4-9

CN15:B

AV4-8,4-9

100p 50V NP0

C82

PreOut Left

C80

CN12:D

AV4-8,4-9

CN12:B

AV4-8,4-9

CN13:D

AV4-8,4-9

R74

220R 1/8W

100p 50V NP0

C78

R76

220R 1/8W

R78

1k 1/8W

R82

1k 1/8W

CN13:B

AV4-8,4-9

CN14:D

AV4-8,4-9

R86

1k 1/8W

R90

1k 1/8W

CN14:B

AV4-8,4-9

R94

1k 1/8W

U6

C47

C83

100p 50V NP0

R109

1k 1/8W

10U NP 16V

C48

100p 50V NP0

10U NP 16V

C53

100p 50V NP0

C51

C57

100p 50V NP0

10U NP 16V

C55

C61

100p 50V NP0

10U NP 16V

C59 C65

100p 50V NP0

10U NP 16V

R110

47k 1/8W

R79

47k 1/8W

R83

47k 1/8W

R87

47k 1/8W

R91

47k 1/8W

R95

47k 1/8W

U10:A

NE5532N

LK58

LK10MM

LK61

LK10MM

C63

10U NP 16V

U10:B

C39

47n 63V PE

NE5532N

C66

100p 50V NP0

U6

4

C64

10U NP 16V

+15V

8

C40

47n 63V PE

U6

C62

100p 50V NP0

CN14:A

AV4-8,4-9

R97

1k 1/8W

CN14:C

AV4-8,4-9

R92

1k 1/8W

C60

10U NP 16V

C58

100p 50V NP0

CN13:A

AV4-8,4-9

R88

1k 1/8W

CN13:C

AV4-8,4-9

R84

1k 1/8W

C52

U6

C56

10U NP 16V

10U NP 16V

100p 50V NP0

C54

U6

CN12:A

AV4-8,4-9

C77

100p 50V NP0

R80

1k 1/8W

C50

100p 50V NP0

CN12:C

AV4-8,4-9

R77

220R 1/8W

CN15:A

AV4-8,4-9

C79

100p 50V NP0

R75

220R 1/8W

CN15:C

AV4-8,4-9

U6

C81

10U NP 16V

C49

10U NP 16V

C46

100p 50V NP0

R

U6

CN16:A

AV2-8,4-9

R72

1k 1/8W

R96

47k 1/8W

4

C68

47n 63V PE

U14:A

NE5532N

R93

47k 1/8W

-15V

+15V

8

C67

4

C69

47n 63V PE

47n 63V PE

+15V

8

R89

47k 1/8W

-15V

4

C72 C70

47n 63V PE

47n 63V PE

R85

+15V

-15V

47k 1/8W

8

C71 C73

4

47n 63V PE

47n 63V PE

8

+15V

R81

47k 1/8W

-15V

4

C75 C74

47n 63V PE

47n 63V PE

R73

-15V

47k 1/8W

+15V

8

C76

4

C45

47n 63V PE

47n 63V PE

8

C44

47n 63V PE

+15V

LCh Out

RCh Out

U18:B

NE5532N

LK68

LK10MM

U17:B

NE5532N

LK69

LK10MM

LK57

LK10MM

U16:B

NE5532N

LK73

LK10MM

LK56

LK15MM

U15:B

NE5532N

LK77

LK10MM

LK53

LK15MM

U13:B

NE5532N

LK81

LK10MM

LK91

LK15MM

LK9

LK15MM

LK8

LK15MM

LK43

R58

LK15MM

LCh HP Out

5

1k8

LK5

R59

6

R61

3k6

LK15MM

RCh HP Out

U6

3

1k8

3k6

+15V

U9:B

NE5532N

7

C41

C42

R112

220R 1/8W

PreOut Left

C85

100P 50V NP0

R111 220R 1/8W

U6

LK49

LK15MM

U6

PreOut Right

LK59

LINK15MM

C84

100P 50V NP0

J8

TERMINAL

-15V

47N 63V PE

U6 U6

GENERAL NOTES

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

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

3.

4.

5.

1.

2.

LK90

LK15MM

U14:B

NE5532N

LK85

LK10MM

LK51

LK15MM

LK93

LK10MM

LK94

U6

LK10MM

Control Bus IR

ABUS PCB DGnd

ABUS IR

ABUS Status

ABUS PCB +5V

R99

100R

LK100

LK15MM

C88

-15V

C89

100N 50V X7R

9

10

11

12

13

14

7

8

5

6

3

4

1

2

SW GND

Vss

L-S1

L-S2

L-S3

L-COM1

L-S4

L-S5

L-S6

L-COM2

L-S7

L-S8

L-COM3

ST

GND

TC9163AF

Vdd

R-S1

R-S2

R-S3

R-COM1

R-S4

R-S5

R-S6

R-COM2

R-S7

R-S8

R-COM3

DATA

CLK

SW GND

100N 50V X7R

20

19

18

17

16

15

24

23

22

21

28

27

26

25

LK101

LK10MM

+15V

R98

100R

U11

CN9

ABUS Control Signals

2,5MM 5W ST HEADER

3

4

1

2

5

Abus GND Amp Mute

Standby Relay

+5VOLTS

C87

1N 50V NP0

LK87

LK10MM

LK99

LK15MM

J1

U13:A

NE5532N

5

6

7

3

4

1

2

TERMINAL

LK10MM

LK15MM

LK97

LK84

LK89

LK10MM

LK80

LK10MM

LK92

LK10MM

LK55

U15:A

NE5532N

LK52

LINK15MM

LK60

LINK15MM

LK10MM

CN5

Clock

Data

DGnd from PIC

Strobe

Control Bus IR

ABUS IR

Amp Mute

2,5MM 7W ST HEADER

To PIC

GND Links on underside

J4

TERMINAL

J5

TERMINAL

J6

TERMINAL

U16:A

NE5532N

LK76

LK10MM

LK54

LK10MM

R100

470k

LK95

LK10MM

R104

1k8

U17:A

NE5532N

U18:A

NE5532N

LK72

LK10MM

LK65

LK10MM

LK62

LK10MM

C90

10P 50V NPO

R105

1k8

R106

560R

ABUS Audio Out

2,5MM 3W ST HEADER

CN10

1

2

3

RCh

GND

LCh

R107

560R

5

6

C93

7

U12:B

NE5532N

10P 50V NPO

R102

+15V C91 1k8

RCh In

LK96

R101

470k

LINK15MM

R103

1k8

3

2

47N PE 63V

1

U12:A

NE5532N

C92

47N PE 63V

LCh In


AP17649/5 Input PCB Schematic (Buffer and Switches)

6

86-756-8687998

RCh In

3

VR2:A

B5K LINEAR

1

4

RL1:B

5

ME2-5S

3

LK16

LK10MM

R24

1k1

C19

1N5 63V PE

R19

2k2

VR1:A

B5K LINEAR

3

C21

R20

4k7

1

680N 63V PE

R23

1k1

LK21

LK15MM

LK19

LK15MM

R17

2k2

6

VR2:B

B5K LINEAR

4

LCh In

8

7

RL1:C

6

ME2-5S

LK18

LK15MM

R25

1k1

R21

2k2

VR1:B

C22

680N 63V PE

4

RL1:A

1

ME2-5S

2

LK104

LK10MM

LK107

LK10MM

D8

1N4004

+5VOLTS

Q9

MPSA14 R123

R122

10k

1k

LK109

LK15MM

LK108

LK15MM

MAIN

C20

1N5 63V PE

R22

4k7

Amp Mute

R26

1k1

LK20

LK15MM

R18

2k2


3

2

C18

+15V 10P 50V NPO

C14

47N 63V PE

U6:A

C16

-15V

47N 63V PE

R36

2k2

3

2

C23

+15V

C9

10P 50V NPO

47N 63V PE

C10

1

U5:A

NE5532N

-15V

47N 63V PE

R37

2k2

C5

SW2:B

+15V

U2

U4

6

5

6

5

47U NP 16V

C6

R15

150k

SW-DPDT

Tone Defeat

C15

100U 25V EL

10N PP 63V

LK27

LK10MM

LK24

LK10MM

LK25

LK10MM

10P 50V NPO

C4

C12

10N PP 63V

C11

VR4:B

MN20K BALANCE

U4

U2

C17

100U 25V EL

R35

2k2

C13

R38

2k2

C8

U6:B

7

NE5532N

47U NP 16V

C3

10N PP 63V

U5:B

7

NE5532N

10P 50V NPO

C24

C7

47U NP 16V

R14

150k

10N PP 63V

47U NP 16V

C105

R16

150k

R13

150k

SW2:A

Out

SW-DPDT

Tone Defeat out

5

LK37

LK15MM

VR4:A

10N PP 63V

C104

5

LK35

LINK15MM

VR3:B

20K MOTORISED DUAL POT

10U NP 16V

R31

22k

Out

Out

5

6

R30

3k

+15V

U7:B

7

NE5532N

R32

1k5

C106

R33

22R

10P 50V NPO

LK33

LK15MM

RCh Out

J3

Out

TERMINAL

LCh Out

-15V

RCh Out

2

1

3

4

1

2

5

6

CN3

H6 2.54mm

TO POWER AMP

CN17

2MM 2W ST HEADER

C102

MN20K BALANCE

C100

2

LK36

10N PP 63V

C101

2 LINK15MM

10U NP 16V

VR3:A

20K MOTORISED DUAL POT

R29

22k

Out

2

3

47N 63V PE

U7:A

NE5532N

1

C99

R34

22R

R27

10P 50V NPO

1k5

R28

3k

-15V

C103

47N 63V PE

LCh Out

Out

GENERAL NOTES

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

3.

4.

1.

2.

5.


AP17649/5 Input PCB Schematic (Tone Control)

7

86-756-8687998


Speaker Test

+5V

Speaker Cable Short Circuit Detector

Speaker short circuit tester

Senses a DC resistance of 2 ohms or less

LK14

LK10MM

LK103

LK10MM

+5Volts

C43

R66

1k

For 1mA

R64

10k

3

2

100N 50V X7R

U8:A

LM393

1

D6

1N4004

R67

100R

R65

2R7

R69

4k7

(Open Collector Output)

D7

PIC VI/Short

1N4148

LK102

R62 no stuff

Mains PCB Control

CN7

3

2

1

R108

PIC Standby Relay

Unreg for Relays

220R 2W Carbon

2,5MM 3W ST HEADER

DGND

R71

4k7

+5Volts

R70

10k

5

U8:B

LM393

7

6

R68

100k

R63

910R

910 / (910 + 10k) with ZP221A501E voltage gives 100deg C cutout

PIC Temp

CN4

3

4

1

2

5

LK38

2,5MM 5W ST HEADER

Speaker PCB Control

SPEAKER B SWITCHING (for relay)

SW1:B

LK10

Speaker Test

Speaker A Relay

LK46

SW-DPDT

TAPE

LK11

LINK15MM

LINK15MM

R57

Unreg for Relays

LK45

220R 2W Carbon

LK10MM

3

4

1

2

5

6

CN11

2,5MM 6W ST HEADER

To Speaker PCB CN1

LK15

LK10MM

PIC VI/Short

Temp Sense

PIC CLIP

R116

10k

C108

100N 50V X7R

C107

100U 16V EL

DGND

R115

10k

Q8

BC337

PIC DC

PIC Protection signals

R117

4k7

Open Collector Output

+5V

LK39

LK10MM

PIC Temp

PIC VI/Short

PIC Standby Relay

PIC DC

PIC CLIP

Speaker A Relay

DGND

CN6

7

8

5

6

3

4

1

2

2,5MM 8W ST HEADER

To PIC

DGND

GENERAL NOTES

1.

2.

3.

4.

5.

Rev3: R65 Changed from 10R to 8R2

Rev4: R65 Changed from 8R2 to 4R7

Rev5: R65 Changed from 4R7 to 2R7


AP17649/5 Input PCB Schematic (Protection Circuitry)

8

86-756-8687998


R39

5k6

RCh HP Out

(Rch Out)

R52

100R

R51

No Stuff

R118

1k5

R119

3k

5

6

U1:B

7

NE5532N

R43

560R

R42

560R Q5

BD139

R40

3k3

R41

2k7

Main

Main

LCh HP Out

(Lch Out)

R49

100R

Main

R50

No Stuff

-15V

+15V

R53

Main

10R

R54

10R

R120

1k5

R121

3k

2

3

LK4

LINK10MM

C97

470U 25V EL

C96

47N 63V PE

U1:A

1

Main

NE5532N

C95

47N 63V PE

C94

470U 25V EL

Main

R48

560R

R47

560R

LK3

LINK10MM

LK1

LINK10MM

LK2

LINK10MM

R44

5k6

R45

3k3

Q2

BD139

R46

2k7

R2

5k6

R7

5k6

Q6

BD139

R8

1R

R6

1R

Q4

BD140

Main

R9

180R

C2

10N 63V PE

R10

360R

CN2

1

2

2,5MM 2W ST HEADER

R11

10R 2W

R12

10R 2W

Q3

BD139

8

7

CN1

3

2

Main

1

HEADPHONE JACK

GND

RSW1

RSW2

R

L

R3

1R

R1

1R

Q1

BD140

R4

180R

C1

10N 63V PE

R5

360R

Main

GENERAL NOTES

1.

2.

3.

4.

5.

Rev1: Resistors R118-121 added

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


AP17649/5 Input PCB Schematic (Headphone Driver)

9

86-756-8687998


Super Hi-Fidelity Ultra Linear Preamp Stage


AP17649/4 Input PCB Board Layout (Top Side)

10

86-756-8687998



AP17649/4 Input PCB Board Layout (Bottom Side)

11

86-756-8687998

Cambridge Audio Azur 540A V2.0 Amplifier Input PCB Assembly BOM

AP Part

No

Value Description/Type Factory Part No.

Qty

RESISTORS

1R 0.25W metal film

Component Ident

4 R1, 3, 6, 8.

2R7

1K5

1K8

2K2

2K7

3K

3K3

3K6

4K7

5K6

10K

22K

100K

150K

470K

10R

22R

100R

180R

360R

560R

910R

1K

1K1

1k

220R

47K

10R

220R

CAPACITORS

10pF 50V

100pF 50V

1nF 50V

100nF 50V

100nF 100V

1.5nF 63V

10nF 63V

47nF 63V

680nF 63V

10nF 63V

10uF 16V

47uF 16V

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.125W metal film

0.125W metal film

0.125W metal film

2W Carbon

2W Carbon

NP0 Ceramic

NP0 Ceramic

Ceramic

Ceramic

Monolythic Ceramic

Polyester film

Polyester film

Polyester film

Polyester film

Polypropylene film

Non Polarised

Electrolytic

Non Polarised

Electrolytic

1181-100042-000

1181-101042-000

1100-102043-000

1100-104043-000

1106-104064-001

1117-103052-000

1117-473053-000

1105-100013-000

8 C8, 13, 18, 23, 90, 93, 99, 106.

18

C46, 48, 50, 53, 54, 57, 58, 61, 62, 65,

66, 77-80, 83, 84, 85

1 C87

6 C25, 27, 43, 88, 89, 108

3 C35, 36, 37.

2 C19, 20

2 C1, 2

C9, 10, 14, 16,29-31, 34, 39, 40, 41,

30 42, 44, 45, 67-76, 91,92,95, 96, 102,

103

2 C21, 22

6 C3, 6, 12, 24, 100, 105

14

C47, 49, 51, 52, 55, 56, 59, 60, 63, 64,

81, 82, 101, 104

4 C4, 5, 7, 11,

Notes

AP17652/5

1 R65

See Input Schematic (Protection

Circuitry)

2 R53, 54

2 R33, 34

5 R49, 52, 67, 98, 99.

2 R4, 9

2 R5, 10

6 R42, 43, 47, 48,106,107

1 R63

2 R66,( R123)

4 R23-26

See Input Schematic (Tone Control)

4 R27, 32, (118,120)

See Input Schematic (Headphone

Driver)

6 R58, 59, 102-105.

8 R17-19, 21, 35-38

2 R41, 46

4

2

R28, 30, R119,

R11,12

(R121)


Driver)

2 R40, 45

2 R60, 61

8 R20, 22, 55, 56, 69, 71, 114, 117

4 R2, 7, 39, 44

5 R64, 70, 115, 116, (122)

2 R29, 31

1 R68

4 R13-16

2 R100, 101

12

R72, 78, 80, 82, 84, 86, 88, 90, 92, 94,

97, 109.

6 R74-77, 111, 112.

12

R73, 79, 81, 83, 85, 87, 89, 91, 93, 95,

96, 110,


See Input Schematic (Buffers and

Switches)


Driver)

2 R57, 108

1uF 25V

47uF 16V

100uF 16V

100uF 25V

Polarised Electrolytic




1102-107024-000

1102-470014-000

1102-101014-000

1102-101024-000

1 C38

1 C26

1 C107.

2 C15, 17

Note: resistors, capacitors and other 'generic' electronics components are not usually stocked by the manufacturer. Please obtain these locally.

12

Cambridge Audio Azur 540A V2.0 Amplifier Input PCB Assembly BOM

AP Part

No

Value Description/Type Factory Part No.

Qty

100uF 25V

105 degree Polarised

2 C28, 98.

470uF 25V

Electrolytic

Polarised Electrolytic 2 C94, 97

1000uF 35V

TRANSISTORS

Polarised Electrolytic 1102-102034-000 2 C32, 33

Component Ident

BD140 PNP Low power 2 Q1, 4

BD139 NPN Low power

PY219 BC327-25

PY214 BC337-25

PNP Signal

NPN Signal

NPN Darlington

DIODES

PY319 1N4004 Rectifier

PY759 1N4148 Signal

INTEGRATED CIRCUITS

PY108

PY539

PY476

NE5532N

L7915CV

L7805

L7815CV

LM393

TC9163AF

POTS

PY1013 20kA

MN20k

Motorised Dual Volume

Pot

Dual Balance Pot

PY045

5kB

SWITCH

Dual Linear Pot

2P2T Push Switch

MISCELLANEOUS

1301-327000-100

1300-337000-100

1300-140000-100

1401-140040-000

1401-141480-000

4155-320052-900

4139-300052-600

4191-630103-000

1062-003511E110

1062-003518E160

1062-002518E130

2402-020200-010

PY584

LINK10mm

LINK15mm

24SWG Tinned Copper

Wire

24SWG Tinned Copper

Wire

5V Relay 4050-000005-002

Notes

AP17652/5

Q1 and Q2 must be thermally coupled and Q4 and Q5 must be thermally coupled, please see misc section for parts

Q1 and Q2 must be thermally coupled and Q4 and Q5 must be thermally coupled, please see misc section for parts

4 Q2, 3, 5, 6,

1 Q7

1 Q8

1 Q9

9 D1-6, (D8, D9, D10)

1 D7

13 U1, 5-7, 9, 10, 12-18

1 U2

1 U3

1 U4

1 U8

1 U11


See Input Schematic (Power Supply &

Tone Control)

1 VR3

1 VR4

2 VR1, 2

High Torque

High Torque

High Torque

2 SW1, 2

70

LK1-4, 13, 22, 23, 26, 28-31, 44, 47,

63, 64, 66, 67, 70, 71, 74, 75, 78, 79,

82, 83, 86, 88, 98, 14-16,24, 25, 27,

38-40, 45, 46, 54, 55, 57, 58, 61, 62,

65, 68, 69, 72, 73, 76, 77, 80, 81, 84,

85, 87, 92-95, 97, 101-

103, (104,105,106,107)

See Input Schematic (Power Supply &

Tone Control)

39

LK5, 8, 9, 18-21, 33, 37, 43, 49, 51,

53, 56, 89-91, 99, 100, 6, 7, 10-12, 17,

32, 34-36, 41, 42, 48, 50, 52, 59, 60,


96, (108,109)

1 RL1 See Input Schematic (Tone Control)

Note: resistors, capacitors and other 'generic' electronics components are not usually stocked by the manufacturer. Please obtain these locally.

13


J2

FROM J4 (Common)

J1

SW1

VOLTSELECT RF1002B

115/230V Marking

BROWN (230V)

J3

BLACK (115V)


AP17977/2 Voltage Select Switch PCB Schematic

14

86-756-8687998



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

15

86-756-8687998


16

86-756-8687998

Cambridge Audio Azur 540A V2 Voltage Selector PCB Assembly BOM

Value Description/Type Qty Component Ident Factory Part Number

CONNECTORS

RF1002B Voltage Selector 1 SW1 2406-010200-000

Notes

AP17980/1 manufacturer. Please obtain these locally.


CN3

IEC-SOC

L

E

N earth

J11

Switch

J12

Switch

FU5

J15

20MM T6.3AL

TO VOLT SELECT

C2

1N X1/Y1

CCDE102MB

J8

EMC

Chassis Connection

C1

1N X1/Y1

CCDE102MB

C3

47N X1

Mains Toroid TRANSFORMER

J1

TERMINAL

8

7

RL1:C

RELAY

6

J2

TERMINAL

J18

TERMINAL

J13

BLUE/WHITE

J19

TERMINAL

5

RL1:B

4

3

RELAY

8

RL2:C

6

7

RELAY

5

4

RL2:B

RELAY

3

High Power Secondaries

Power Amp supplies

D1

1N4004

2

1

LK10

LK10MM

RL1:A

RELAY

LK11

LK15MM

D11

1N4004

CN2

3

2

1

H3 2.54mm

R2

1k

R1

10k

LK9

LK15MM

Q3

MPSA14

640A only

R24

1k

R25

10k

Q4

MPSA14

2

RL2:A

1

RELAY

J3

TERMINAL

Mains Toroid TRANSFORMER

J4

TERMINAL

Secondary 1

J20

TERMINAL

J21

TERMINAL

Secondary 2 (640A only)

Low Power secondary

J5

TERMINAL

J6

TERMINAL

J7

TERMINAL

F1

POLYFUSE 1-1A

F2

POLYFUSE 1-1A

1

2

3

CN1

3,96MM 3W ST HEADER


AP17657/1 Mains PCB Schematic

18

86-756-8687998


+5V

2,5MM 2W 90 HEADER

CN10

R18

10k

1

2

HP Detect

DGnd

CRS1

DGND

DGND

Switch Strobe

Clock

Data

LED Strobe

9

10

11

12

13

14

7

8

3

4

1

2

5

6

FREQ=4MHz

MCLR

R19

U2 10k

DGND

MCLR/Vpp

RA0/AN0

RA1/AN1

RA2/AN2

RA3/AN3/Vref

RA4T0CKi

RA5/AN4/SS

Vss2

OSC1/CLKI

OSC2/CLKO

RC0/T1OSO/T1CKI

RC1/T1OSI

RC2/CCP1

RC3/SCK/SCL

RB7/PGD

RB6/PGC

RB5

RB4

RB3

RB2

RB1

RB0/INT

VDD

VSS

RC7

RC6

RC5/SDO

RC4/SDI/SDA

PIC16F72I/SP

+5V

24

23

22

21

20

19

18

17

16

15

28

27

26

25

J14

Chassis

C8

TERMINAL

10N 50V NP0

IR In

ABUS IR

ABUS Status

MCLR vol up vol down

+5V

CN9

2,5MM 6W 90 HEADER

+5V

LK5

LINK10MM

C9

100n

U3

LK1

LINK10MM

DGND

LED Strobe

Clock

Data

15

1

3

2

OE

STB

CLK

D

74HC4094

+5V

DGND

C7

Clock

Data

IR In

ABUS IR

ABUS Status

R10 22R

R11

22R

R9

22R

LK3

LINK10MM

DGND

5

6

7

1

2

3

4

CN7

I2C Clock

I2C Data

DGnd

I2C Switch Strobe

CA Control Bus IR

ABUS IR

ABUS Status

2,5MM 7W 90 HEADER

QS

QS

Q4

Q3

Q2

Q1

Q0

Q7

Q6

Q5

10

9

11

12

13

14

5

4

7

6

R21

10k

R16

10k

R17

10k

R22

10k

R26

10k

Q1

BC337

DGND

LK8

LK15MM

R8

10k

5

4

3

2

1

8

7

6

CN6

Speaker A Relay

Clip

DC

Standby Relay

VI/Short

Temp

H8 2.54mm 90

R4

10k

DGND

DGND

LK6

LINK10MM

SW1

TUNER

SW2

AV

SW3

TAPE MON

SW6

CD

SW5

PHONO/AUX

SW4

DVD

DGND

LK4

LINK10MM

DGND

R20

220R

DGND

CHANNEL LED

Q2

BC337

R23

220R

DGND

R5

220R

R7

220R

+5V

LK2

LK7,5MM

DGND

IR In

R6

10k

3

4

5

6

1

2

CN5 CN8

3

4

5

6

1

2

J16

TERMINAL

(1) J17

TERMINAL

C10 no stuff

SNAP OFF SECTION (d)

J9

TERMINAL

(1)

J10

TERMINAL

D9

LED 3MM RED protection

C5

100n

D2 D3

CHANNEL LED

LK7

LINK10MM

U1

C6

220U 16V EL

FIN

GND1

RIN

NC

GND2

VCC

OUT2

COM

OUT1

BA6218

D4

CHANNEL LED

7

8

5

6

9

1

2

3

4

DGND

R3

D5

CHANNEL LED

D6

CHANNEL LED

2R2

SNAP OFF SECTION (c)

D8

Blue flat top LED

Standby

SW7

STANDBY

R15 47R

U4

3

2

1

+5V

GND

OPT

IR REC 3/5V 36KHZ

C4

100n vol up vol down

R13

10k

CN4

2

1

H2 2.54mm 90

MOTOR

R12

220R

D7

CHANNEL LED

R14

47R

C12

10U 16V EL

C11

100nF 50V X7R


AP17657/1 Front Panel PCB Schematic

19

86-756-8687998



AP17657/1 Front Panel & Mains PCB Layout (Top Side)

20

86-756-8687998


21

86-756-8687998

Cambridge Audio Azur 540A Front Panel and Mains PCB Assembly BOM

AP Part

No.

Value Description Factory Part No.

Qty Component Ident

RESISTORS

220R 0.25W metal film

10K

22R

47R

2R2

1K

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

0.25W metal film

5

540A 12

640A 13

3

R5, 7, 12, 20, 23

R1, 4, 6, 8, 13, 16-19, 21, 22,

25, 26

R9-11

2

1

540A 1

640A 2

R14, 15

R3

R2, 24

CAPACITORS

100nF

47nF

1nF

10nF

50V Ceramic

Mains Rated X1

Mains Rated X1/Y1

50V Ceramic

1100-104044-000

1100-104043-000

5

1

2

1

C4, 5, 7, 9, 11

C3

C1, 2

C8

AP17660/1

Notes

Mains Suppression

Mains Suppression

10uF 16V Electrolytic 1102-100014-000 1 C12

220uF 16V Electrolytic

TRANSISTORS

MPSA14

NPN Darlington

Transistor

NPN Transistor PY214 BC337-25

DIODES

PY064 Blue LED

Red LED

PY319 1N4004 Rectifier Diode


1102-221014-000 1 C6

1300-140000-100

1300-337000-100

540A 1

640A 2

Q3, Q4

2 Q1, 2

3100-000030-003 7 D2-8

3100-000000-003 1 D9

540A 1

640A 2

D1, 11

540A fit Q4 only

540A fit D11 only

PY635 PIC16F721/SP Flash PIC micro 4116-720054-200 1 U2

U2 must be programmed with AP18951/1 software

(file name: 640AV2.hex)

Request from UK Office

PY260 BA6218 Motor Drive IC

PY524 M74HC4094 Shift Register

4162-180002-300

4174-409052-600

1

1

U1

U3

PY054 3/5V 36KHZ IR Receiver

RELAY

PY594

3001-183600-001

8A-250VAC 2P2T 4050-110122-001

SWITCHES

PY043 Tact Switch 2400-020200-000

MISCELLANEOUS

4MHz Ceramic Resonator 1602-400002-990

20MM T6.3AL

1.1A

Polyfuse

1 U4

540A 1

640A 2

RL1, RL2

7

1

1

2

SW1-7

CRS1

FU5

F1,2

540A fit RL2 only

Note: resistors, capacirors and other 'generic' components are not usally stocked by the manufacturer. Please obtain these locally.

22


CN4

1

2

H2 2.54mm

SIGNAL IN

C33

10N 63V PP

C34

47U 16V NP

R69

100k 8th

R68

10R 8th

R54

47R 8th

R AMP

R52

10k 8th

R AMP

C29

47N 63V PE

C38

47N 63V PE

C35

47n poly

R AMP

C32

100P 50V NP0

R INPUT

C28

C40

10U 63V EL

10U 63V EL

Q29

MPSA92

R53

100R

Q22

2SA970GR

Q19

MPSA42

R110

470R 8th

R51

150R 8th

R50

1k 8th

R55

100R

Q21

2SA970GR

R111

470R 8th

R57

22k 8th

C36

10N 63V PP

R INPUT

Q20

MPSA42

C49

1N 50V NPO

LK48

LK7,5MM

Q25

MPSA92

R44

13k 8th

Q28

MPSA92

R AMP

R48

47k

C31

LK25

R56

470R 8th

10P 50V NP0

R58

LK7,5MM

10k

C37

100U 25V NP

R49

18R 8th

WIRE LINK

R AMP

Q24

2SC2240GR

Q23

2SC2240GR

C14

2.2N 50V NP0

R59

LK46

LK7,5MM

2k2 8th

R45

470R 8th

C61

220U 63V EL

LK27

LINK20MM

10R 8th

Q32

2SC2240GR

+45V R +45V. R

LK26

LK15MM

R76

R AMP

R46

150R 8th

R47

100k 8th

R73

2k2 8th

C39

100U 63V EL

1

LK33

LK8MM

B

LK31

LK8MM

C

U4

SAP15NY

D19

1N4004 J20

TERMINAL

J25

TERMINAL

J26 J18

TERMINAL TERMINAL

Q27

MJE350

R43

22k

D30

1N4004

D11

R AMP R AMP

LK49

LK7,5MM

**2k7 1/8W Res

Q26

2SC2240GR

R41

47k 8th

MPSA42

Q18

MPSA42

C50

47U 16V NP

Q17

R40

1k 8th

R39

270R 8th

R AMP

R38

100k 8th

S

4

LK28

LK8MM

R70

100R

R AMP

R60

100R

C30

PR2

PRESET 200R 3296W

100U 63V EL

R61

2k2 8th

LK35

B

D

LK32

LK8MM

E RE1

LK29

LK8MM

LK41

RO

2

LINK20MM

R65

0.22R 3W

R78

0.22R 3W

LK36

LK8MM

D

LK39

LK8MM

E

RE2

J12

TERMINAL

J11

TERMINAL

SPEAKER TEST

5

4

RL1:B

R104

15R 0,5W Carbon

L2

1,2UH AIRCOIL

J9

7

8

RL2:C

6

12V 8A RELAY

CN7:A

1

2

SPKR 4-WAY

3

12V 8A RELAY

5

6

CN7:C

SPKR 4-WAY

TERMINAL

C59

100N 100V MCER

LK34

LK15MM

S

2

LK38

LK8MM

R66

4R7 3W

WW

J16

TERMINAL

D20

1N4004

R AMP

C

LK37

LK8MM

U3

SAP15PY

R37 10R 8th

Q16

2SA970GR

-45V R

C53

220U 63V EL

-45V. R

LK40

LINK20MM

R AMP


AP17653/2 Amp PCB Schematic (Right Channel)

23

86-756-8687998


LO

R112

100k 8th

D5

LK43

LK7,5MM

C55

10U 25V NP

1N4148

D8

1N4148

DGND

D6

D7

1N4148

+45V P

R42

100k 8th

LK24

LK7,5MM

R77

10k 8th

Q31

MPSA42

+45V. R

PIC DC Detect

LK23

LK7,5MM

H16A H16B

R100

15k 8th

RO

L AMP

R63

100k 8th

C54

10U 25V NP

1N4148

D9

Q30

MPSA92

RO

H14B

D25

R99

100k 8th

1N4148

D10

1N4148

1N4148

R96

100k 8th

R97

120k 8th

R AMP

DGND

R109

100k 8th

-45V P

H1A

H2A

H3A

H4A

H5A

H7A

H8A

Left Protection PCB Connector

CN2 CN8

7

8

5

6

3

4

1

2

7

8

5

6

3

4

1

2

H1B

H2B

H3B

H4B

H5B

H6B

H7B

H8B

2,5MM 8W 90 PIN HEADER 2,5MM 8W 90 PIN HEADER

VI Output (R)

VI Bottom Input (R)

Amp Output (R)

VI Top Input (R)

-45V (R)

Amp Output (R)

Clip Output (R)

+45V (R)

H9A

H10A

H11A

H12A

H13A

H15A

H16A

Right Protection PCB Connector

CN3 CN9

7

8

5

6

3

4

1

2

7

8

5

6

3

4

1

2

H9B

H10B

H11B

H12B

H13B

H14B

H15B

H16B

VI Output (R)

VI Bottom Input (R)

Amp Output (R)

VI Top Input (R)

-45V (R)

Amp Output (R)

Clip Output (R)

+45V (R)

-45V. R

1

RL2:A

3

4

1

2

5

6

H6 2.54mm

D28

1N4004

R107

1k 8th

R106

10k 8th

D27

1N4004

2

12V 8A RELAY

Speaker A Relay

Q34

MPSA14

+45V. L

R33

R105

10k 8th

R103

1k 8th

1

RL1:A

D26

1N4004

2

12V 8A RELAY

Speaker B Relay

Q35

MPSA14

LE1

LE2

2k2 8th

LO

R26

Q43

MPSA42

R95

15k 8th

H13A H13B

TH1

LK42

LK7,5MM

ZPP22 100DEG

Mounted on Heatsink

DGND

Temp Sense

PIC VI/Short

PIC DC Detect

PIC Clip Detect

H4A H4B

H3A H3B

C64

R83

820R 8th

220P 50V CER

R84

470R 8th

C65

220U 16V EL

Q37

MPSA42

+45V. R

RE1

Q36

MPSA42

R81

820R 8th

C63

220P 50V CER

R82

470R 8th

C66

220U 16V EL

RE2

Q42

MPSA92

R98

120k 8th

R71

2k2 8th

R64

R117

120k 8th

D31

H15BH15A

1N4148

Q44

MPSA42

LK22

LK7,5MM

LO

+45V P

H6B

1N4148

R86

100k 8th

R116

2k2 8th

R118

100R 8th

LK3 LK4 H5A

-45V P

LK20MM 24AWG

LK20MM 24AWG

H5B

3

4

1

2

5

CN6

2,5MM 5W ST HEADER

To input PCB/To PIC

R85

15k 8th

RO

H1B H1A

H8A H8B

D24

R102

47k 8th

H12A H12B

LK21

LK7,5MM

H11A H11B

R93

820R 8th

C69

220P 50V CER

R94

470R 8th

C68

220U 16V EL

Q40

MPSA42

R91

820R 8th

C70

220P 50V CER

R92

470R 8th

C67

220U 16V EL

R89

15k 8th

R88

100k 8th

R87

120k 8th

Q38

MPSA42

R79

18k 8th

Q41

MPSA42

Q39

MPSA92

R90

120k 8th

R119

2k2 8th

C62

4,7N 50V CER

H9B

R101

47k 8th

H9A

LK20

LK7,5MM

R120

120k 8th

D32

1N4148

Q45

MPSA42

R75

47k 8th

R121

100R 8th

LK30

LK7,5MM

Q33

MPSA92

R74

18k 8th

D18

1N4148

D16

5V1 Zener 400mW

PIC VI/Short

DGND

H7B H7A

DGND

+45V R

DGND

PIC Clip Detect

D17

5V1 Zener 400mW

-45V. L H2A H2B -45V. R H10A H10B

91k 8th 91k 8th


AP17653/2 Amp PCB Schematic (Protection)

24

86-756-8687998

+45V L

WIRE LINK

+45V P

WIRE LINK FOR 540A ONLY

+45V R

WIRE LINK

C24

2200U 50/63V EL 105

540A/640A

C27

2200U 50/63V EL 105

540A/640A

CN5

2MM 2W ST HEADER

2

1

C42

2200U 50/63V EL 105

540A/640A

C41

2200U 50/63V EL 105

540A/640A

L PSU

C25

2200U 50/63V EL 105

540A/640A


C26

2200U 50/63V EL 105

540A/640A

-45V P

WIRE LINK

J8

TERMINAL


R PSU

C43

2200U 50/63V EL 105

540A/640A

C44

2200U 50/63V EL 105

540A/640A

WIRE LINK

-45V L

-45V R


D13

1N5402

D12

1N5402

D14

1N5402

D15

1N5402

D3

1N5402

D4

1N5402

D2

1N5402

D1

1N5402

F4

F8AL 20MM

C47 no stuff

C46 no stuff

C48

100N 100V MCERAMIC

F3

F8AL 20MM

J3

ORANGE

J1

RED

J2

YELLOW

WIRE LINKS FOR 540A ONLY

F1

F8AL 20MM

J13

RED

C1 no stuff

C2 no stuff

C71

100N 100V MCERAMIC

F2

F8AL 20MM

J15

ORANGE

J14

YELLOW

R PSU

L PSU

LK2

LK7,5MM

LK44

LK7,5MM

C45

No Stuff

R108

100R

C3

No Stuff

R1

100R

J4

CHASSIS

J19

CHASSIS


GENERAL NOTES

3.

4.

5.

1.

2.

Rev2: R1, R108 change to 100R, C3 and C45 no stuff,

AP17653/2 Amp PCB Schematic (Power Amp)

25

86-756-8687998


CN1

1

2

2,5MM 2W ST HEADER

Left Input

C21

47N 63V PE

L AMP

C23

10U 63V EL

Q4

MPSA92

R6

150R 8th

R5

1k 8th

Q3

MPSA92

R114

47k

R3

150R 8th

C19

10N 63V PP

C18

47U 16V NP

R31

100k 8th

R9

47R 8th

R8

100R

Q5

2SA970GR

R10

100R

Q11

2SA970GR

L AMP

C8

R11

470R 8th

10P 50V NP0

R13

10k

R30

10R 8th

R7

10k 8th

C7

100P 50V NP0

R12

22k 8th

L AMP

C17

47n poly

C9

L AMP

47N 63V PE

L INPUT

Q9

MPSA42

C11

10U 63V EL

R17

470R 8th

R16

470R 8th

C16

10N 63V PP

C20

100U 25V NP

WIRE LINK

L INPUT

Q10

MPSA42

C4

1N PP 63V 5%

R4

18R 8th L AMP

Q6

2SC2240GR

Q7

2SC2240GR

LK47

LK7,5MM

Q8

MPSA92

R14

13k 8th

C13

2.2n 50V NPO

LK45

LK7,5MM

R29

2k2 8th

R115

470R 8th

Q2

MJE350

LK5

LK15MM

R36

10R 8th

Q15

2SC2240GR

R2

100k 8th

R35

C22

100U 63V EL

2k2 8th

+45V L

L AMP

LK6

LINK20MM

LK12

LK8MM

1

B

C56

220U 63V EL

LK10

LK8MM

C

Q1

2SC2240GR

L AMP

U2

SAP15NY

S

4

LK8

LK8MM

+45V. L

R32

100R

LK1

LK7,5MM

L AMP

47U 16V NP

L AMP

C5

D21

1N4004

J22

TERMINAL

J21

TERMINAL

J24

TERMINAL

J23

TERMINAL

PR1

PRESET 200R 3296W

D

LK11

LK8MM

LK7

LINK20MM

2

E

LK9

LK8MM

LO

LE1

R113

0.22R 3W

R27

0.22R 3W

J6

TERMINAL

J5

TERMINAL

R80

1,2UH AIRCOIL

C15

100N 100V MCER

4

5

SPEAKER TEST

RL2:B

3

12V 8A RELAY

SPKRA

J7

TERMINAL

8

RL1:C

6

7

CN7:B

3

4

12V 8A RELAY

SPKRB

7

8

CN7:D

SPKR 4-WAY SPKR 4-WAY

R18

22k

R20

47k 8th

R15

100R

D29

LK50

LK7,5MM

1N4004

R19

1k 8th

D23

** 2k7 1/8W Res

Q13

MPSA42

R21

270R 8th

Q12

MPSA42

R22

100k 8th

R23

L AMP

10R 8th

Q14

2SA970GR

C10

100U 63V EL

R24

2k2 8th

-45V L

LK14

LK8MM

5

B

L AMP

LK15

LK8MM

LK18

LK8MM

D

LK19

LINK20MM

E

S

2

LK17

LK8MM

U1

SAP15PY

C

LK16

LK8MM

C12

220U 63V EL

LE2

D22

1N4004

-45V. L

LK13

LK15MM

R28

4R7 3W

WW

L AMP

J17

TERMINAL


AP17653/2 Amp PCB Schematic (Left Channel)

26

86-756-8687998



AP17653/1 Amp PCB Board Layout (Top Side)

27

86-756-8687998



AP17653/1 Amp PCB Board Layout (Bottom Side)

28

86-756-8687998

Cambridge Audio Azur 540A V2 Amp PCB Assembly BOM

AP Part

No

Value Description Reference

Capacitors

100nF 100V Monolithic Ceramic

1nF 63V Polypropylene film

C15,C48,C59,C71

C4

Qty Factory Part No

AP17656/2

Comments

540A - 3

640A - 4

1106-104064-001 540A only C48 is not fitted

1

47uF 16V

47nF 63V

100pF 50V

10pF 50V

100uF 63V

10uF 63V

220uF 63V

2.2nF 50V

10nF 63V

47nF 63V

100uF 25V

2200uF 50V

2200uF 63V

10pF 50V

1nF 50V

10uF 25V

Non Polarised Electrolytic C5,C18,C34,C50

Polyester Film

NP0 Ceramic

NP0 Ceramic


Polarised Electrlytic


NP0 Ceramic

Polypropylene film

Polyester Film

C9,C21,C29,C38

C7,C32

C8

C10,C22,C30,C39

C11,C23,C28,C40

C12,C53,C56,C61

C13,C14

C16,C19,C33,C36

C17,C35

Non Polarised Electrolytic C20,C37

105deg Polarised

Electrolytic

105deg Polarised

Electrolytic

NP0 Ceramic

Ceramic

C24-C27,C41-C44

C24-C27,C41-C44

C31

C49

Non Polarised Electrolytic C54,C55

4

4

2

4

4

4

2

1

4

540A only 2

2

540A only 8

640A only 8

1

1

2

1105-470014-000

1117-473053-000

1181-101042-000

1102-101054-000

1102-100054-000

1105-101024-000

1102-222044-001

1181-100042-000

1105-100024-000

Only fitted for 540A

Screened for CA/63V for 540A

(540A only)

Screened for CA/63V for 640A

(640A only)

PY016

PY010

PY594

4.7nF 50V

220pF 50V

220uF 16V

Diodes

Ceramic

Ceramic


C62

C63,C64,C69,C70

C65-C68

1N5402

1N4148

Rectifier Diode

Signal

3V9 500mW Zener

5V1 500mW Zener

1N4004

Fuses

Rectifier Diode

640A D1-D4, D12-

15

540A - D1-4 only

D5-

D10,D18,D24,D25,D

31,D32

D11,D23

D16,D17

D19-D22,D26-D30

F8AL 20MM

Fuse Holders

640A F1-F4

540A F1,F2

640A F1-F4

540A F1,F2

Inductors

24.5T 0.9mm 1.2uH Output Inductor

Ics

SAP15PY

SAP15NY

Pots

200R

Relay

PNP Power Transistor

NPN Power Transistor

3296W Multiturn Preset

L1,L2

U1,U3

U2,U4

PR1,PR2

1

4

4

540A - 4

640A - 8

11

2

2

9

540A - 2

640A - 4

540A - 2

640A - 4

2

2

2

2

1100-472043-000

1100-221042-000

1102-221014-000

1401-141480-000

1401-140040-000

3203-874801-000

1301-150000-700

1300-150000-700

12V 8A RELAY

Resistors

RL1,RL2 2

Please stand off pcb by 5mm

Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally.

29


AP Part

No

Value Description Reference Qty Factory Part No

PY910

PY018

100k 8th

150R 8th

18R 8th

1k 8th

91k 8th

10k 8th

47R 8th

100R

470R 8th

120k 8th

22k 8th

10k

13k 8th

100R 8th

22k

2k7 8th

47k 8th

270R 8th

10R 8th

2k2 8th

0.22R 3W

4R7 3W

47k

15k 8th

18k 8th

15R

820R 8th

Transistors

0.5W Carbon film

2SC2240GR NPN Low Noise

MJE350 PNP Low Power

R2,R22,R31,R38,R42,

R47,R63,R69,R86,R8

8,R96,R99,R109,R112

R3,R6,R46,R51

R4,R49

R5,R19,R40,R50,R10

3,R107

R25,R33,R62,R71

R7,R52,R77,R105,R1

06

R9, R54

R1,R8,R10,R15,R32,R

53,R55,R60,R70,

R108

R11,R16,R17,R45,R5

6,R82,R84,R92,R94,R

110,R111,R115

R87,R90,R97,R98,R1

17,R120

R12,R57

R13,R58

R14,R44

R118, R121

R18,R43

D11,D23

R20,R41,R75,R101,R

102

R21,R39

R23,R30,R36,R37,

R68,R76

R24,R26,R29,R34,R3

5,R59,R61,R64,R72,R

73, R116, R119

R27,R65,R78,R113

R28,R66

R48,R114

R85,R89,R95,R100

R74,R79

R80,R104

R81,R83,R91,R93

14

10

12

6

2

2

2

2

2

2

5

2

540A 6

640A 4

12

4

2

4

2

4

4

2

6

4

4

2

5

2

Q1,Q6,Q7,Q15,Q23,

Q24,Q26,Q32

Q2,Q27

8

2 1301-350000-200

AP17656/2

Comments

640A has R30 and R68 linked out

540A has R30 and R68 fitted

PY220 MPSA92

2SA970GR

PNP High Voltage

PNP Low Noise

Q3,Q4,Q8,Q25,Q28-

Q30,Q33,Q39,Q42

Q5,Q11,Q14,Q16,Q

21,Q22

10 1301-920000-100

6 1301-970000-100


30


AP Part

No

Value Description Reference Qty Factory Part No

PY537 MPSA42

MPSA14

NPN High Voltage

NPN Darlington

Q9,Q10,Q12,Q13,Q

17-Q20,Q31,Q36-

Q38,Q40,Q41,Q43-

Q45

Q34,Q35

17 1300-420000-100

2 1300-140000-100

AP17656/2

Comments


31


CN9

1

2

3

2,5MM 3W ST HEADER

CN1

3

4

1

2

5

2,5MM 5W ST HEADER

+5V

C1

10uF 16V EL

C2

100n 50V X7R

LOGIC GND

LOGIC GND

C23

1N 50V CERAMIC

R53

1K

ABUS GND

RIGHT

LEFT

C22

47U 25V EL

C21

47U 25V EL

C29

47U 25V EL

+12V

R2

10K

Q1

BC337-25

STATUS

R35

10K

LOGIC GND

Q4

BC327-25

Cambridge Control Bus Abus Powered Circuitry

+5V

+5V

U2

CA IR DEMODULATOR

IR REC 3/5V 36KHZ

D1

A

R52

220R

EMITTER IN (MODULATED IR)

R39

47R

R40

47R

IR receiver

K

CONTROL BUS IN

CN2:A

3

1

AV2-8,4-10

R6

220R

+5V

LK17

LK7,5MM

C4

100n 50V X7R

LOGIC GND

C3

10uF 16V EL

JACK-CKX-3.5-12

CN8

3.5mm JACK

C6

100n 50V X7R

LOGIC GND

C5

10uF 16V EL

U3

3

2

1

+5V

GND

OPT

IR receiver

IR REC 3/5V 37KHZ

CA IR DEMODULATOR

LOGIC GND

1

U4

2

3

NC

OP4N25

4

C31

100n 50V X7R

6

5

3

U1:A

1

2

4011 VDD=+5V

VSS=LOGIC GND

LOGIC GND

R38

10K

LK14

LK7,5MM

R3

10K

R7

220K

+5V

R1

10K

LK16

LK7,5MM

Q2

BC337-25

12

VDD=+5V

VSS=LOGIC GND

U1:D

13

4011

11

U1:C

8

9

10

4011

U1:B

VDD=+5V

VSS=LOGIC GND

5

6

LOGIC GND

4011

VDD=+5V

VSS=LOGIC GND

4

LK15

LK7,5MM

+5V

R5

100R

CONTROL BUS OUT

CN2:B

4

C32

2

AV2-8,4-10

1N 50V CERAMIC

LOGIC GND

C33

100n 50V X7R

LOGIC GND

R4

2R2

D2

A

K

R34

27K

LOGIC GND

C34

100n 50V X7R

R37

470R

R33

4K7

Q5

BC337-25

LOGIC GND

ABUS GND

LK13

LK7,5MM

R12

10K

R29

100R

R28

100R

R30

10K

R31

10K

ABUS GND

D4

LK6

1N4148

D3

LK7,5MM

D6

BZX79C2V7

D5

1N4148 BZX79C2V7

+12V

LK2

LK7,5MM

R50

10K

ABUS GND

LK12

LK7,5MM

C27

100U 16V EL

C28

100U 16V EL

LK11

LK7,5MM

ABUS GND

R21

120k

R41

120k

R43

120k

R44

120k

R49

10K

C24

10uF 16V EL

R42

150k

R45

150K

+24V

5

6

3

U7

L7812

VO

C25

100n 50V X7R

ABUS GND

R20

150K

7

U6:B

NJM5532M

C14

10p 50V NP0

C20

LK9

LK7,5MM

3

2

100n 50V X7R ABUS GND

R47

1

47R

U6:A

NJM5532M

R46

150K

ABUS GND

ABUS GND

VI

1

C35

100n 50V X7R

LK1

LK7,5MM

R51

D7

100R 0.25W Fusible

C26

220uF 35V EL

1N4004

C30

100n 50V X7R

+24V

C16

+24V

R48

47R

10U 35V NP

C13

47p 50V NP0

ABUS GND

C17

+24V IN

2

CN7

1

C36

1N 50V CERAMIC

3

RICCO PCB JACK

ABUS GND

LK7

LK7,5MM

LK5

LK7,5MM

LK3

LK7,5MM

A-BUS A

KEYPAD A

LEFT AUDIO

IR

STATUS

RIGHT AUDIO

POWER

8

7

6

5

4

3

2

1

POLYFUSE 1-1A

F2

CN6

GENERIC RJ45X1

ABUS GND

10U 35V NP

C18

47p 50V NP0

+12V

Q3

BC337-25

ABUS GND

R36

4K7

R22

120k

R23

120k

R27

120k

R26

120k

R24

150k

R25

150k

+24V

C19

10p 50V NP0

5

6

C7

7

U5:B

NJM5532M

LK10

LK7,5MM

10p 50V NP0

R32

150k

C10

100n 50V X7R

3

2

1

U5:A

NJM5532M

ABUS GND

R19

150k

C15

10p 50V NP0

R17

47R

ABUS GND

ABUS GND

R18

47R

ABUS GND

C8

10U 35V NP

C9

47p 50V NP0

C12

10U 35V NP

C11

47p 50V NP0

R14

100R

R15

100R

R9

100R

R10

100R

R16

27K

R11

27K

R13

27K

ABUS GND

R8

27K

ABUS GND

RIGHT AUDIO

LEFT AUDIO

IR

STATUS

LK8

LK7,5MM

LK4

LK7,5MM

POWER

POLYFUSE 1-1A

F1

A-BUS B

KEYPAD B

8

7

6

5

4

3

2

1

CN5

GENERIC RJ45X1

ABUS GND

CN4

IR EMITTER OUTPUTS

1

2

CN3

IR EMITTER OUTPUTS

3

4

LOGIC GND


AP17708/4 Abus Module PCB Schematic

32

86-756-8687998


CN7

CN8

C34

Q2

Q1

R2

U1

CN1

C1

CN2

U4

C31

C2

C4

D1

C3

D2

C5

C6

CN3

Q3

R33

LK13

R35

CN4

C8

C7

R32

C22

CN9

C10

U5

C21

LK8

LK6

LK7

D5

CN5

LK5

D6

C16

CN6

C17

F1 F2

R49 R50

C12

R19

C15

C14

R20

R47

C20

C18

R46

C19

C28 C27 C26

U7

D7

LK1

C35

LK2

C24

C25

U6

LK11

LK12

C29

R52


AP17708/4 Abus Module PCB Layout (Top Side)

33

86-756-8687998



AP17708/4 Abus Module PCB Layout (Bottom Side)

34

86-756-8687998

Cambridge Audio Azur 540A V2 A-Bus PCB BOM

AP Part

No

Value Description Factory Part No Qty

RESISTORS

2R2

47R

100R

220R

470R

1K

4K7

0.125W metal film

0.125W metal film

0.125W metal film

0.125W metal film

0.125W metal film

0.125W metal film

0.125W metal film

10K

27k

120K

150K

220K

0.125W metal film

0.125W metal film

0.125W metal film

0.125W metal film

0.125W metal film

Component Ident

1 R4

6 R17, 18, 39, 40, 47, 48

8 R5, 9, 10, 14, 15, 28, 29

2 R6, 52

1 R37

1 R53

2 R33, 36

10

R1, 2, 3, 12, 30, 31, 35, 38,

49, 50

5 R8, 11, 13, 16, 34

8

8

R21, 22, 23, 26, 27, 41, 43,

44

R19, 20, 24, 25, 32, 42, 45,

46

1 R7

1 R51 100R 0.33W Fusible metal film

CAPACITORS

10pF 50V

47pF 50V

1nF 50V

NP0 Ceramic

NP0 Ceramic

Ceramic

100nF 50V Ceramic

PY755

PY1007

PD025

10uF 16V

47uF 25V

100U 16V




220uF 35V Polarised Electrolytic

10U NP 35V NP Electrolytic

TRANSISTORS

PY214 BC337-25

PY219 BC327-25

DIODES

NPN Signal

PNP Signal

PY962 Red LED

PY759 1N4148

BZX79C2V7

1N4004


4011

NJM5532M

L7812

FUSES

POLYFUSE

1.1A

Quad 2 Input NAND Gate

36kHz IR Receiver

37kHz IR Receiver

Opto Isolator

Op amp

12V 1A Regulator

1181-100042-000

1181-470042-000

1100-102043-000

1100-104043-000

1102-100014-000

1102-470024-000

1102-101014-000

1102-221034-001

1300-337000-100

1301-327000-100

1401-141480-000

1402-270001-201

1401-140040-000

3001-348360-000

3001-348370-000

4142-500050-001

4155-320101-600

4178-120302-600

4030-301100-001

4 C7, 14, 15, 19

4 C9, 11, 13, 18.

3 C23, 32, 36

11

C2, 4, 6, 10, 20, 25, 30, 31,

33, 34, 35

4 C1, 3, 5, 24

3 C21, 22, 29

2 C27, 28

1 C26

4 C8, 12, 16, 17

4 Q1, 2, 3, 5

1 Q4

2 D1, 2

2 D3, 4

2 D5, 6

1 D7

1 U1

1 U2

1 U3

1 U4

2 U5, 6

1 U7

2 F1, 2

AP17711/1

NOTES

Resistor must be raised off the PCB by 5mm

Note: resistors, capacitors and other 'generic' electronic components are not usally stocked by the manufactirer. Please obtain these locally.

35

Cambridge Audio Azur 540A Amplifier V2.0

IC Pin Layout Details

Input PCB

BD140 (Q1 & Q4)

BD139 (Q2, Q3, Q5 & Q6)

BC327 (Q7)

BC337 (Q8)

MPSA14 (Q9)

NE5532 (U1, U5, U6, U7, U9,

U10, U12, U13, U14, U15, U16,

U17 & U18)

36

7915 (U2)

7805 (U3)

7815 (U4)

LM393 (U8)

TC9163AF (U11)

37

Power Amp PCB

SAP15PY (U1 & U3)

SAP15NY (U2 & U4)

2SC2240GR (Q1, Q6, Q7, Q15,

Q23, Q24, Q26 & Q32)

MJE350 (Q2 & Q27)

38

MPSA92 (Q3, Q4, Q8, Q25, Q28,

Q29, Q30, Q33, Q39 & Q42)

2SA970GR (Q5, Q11, Q14, Q16,

Q21 & Q22)

MPSA42 (Q9, Q10, Q12, Q13,

Q17, Q18, Q19, Q20, Q31, Q36,

Q37, Q38, Q40, Q41, Q43, Q44

& Q45)

MPSA14 (Q34 & Q35)

39

Front Panel & Mains PCB

MPSA14 (Q4)

BC337 (Q1 & Q2)

PIC16F72-I/SP

BA6218 (U1)

M74HC4094 (U3)

40

TSOP1836 (U4)

A-BUS PCB

BC337 (Q1, Q2, Q3 & Q5)

BC327 (Q4)

4011 (U1)

TSOP1836 (U2)

41

TSOP1837 (U3)

OP4N25 (U4)

NJM5532 (U5 & U6)

7812 (U7)

42

Cambridge Audio Azur 540A V2 Service Manual

540A V2

SERVICE MANUAL

540A V2.0 SERVICE MANUAL

SAFETY PRECAUTIONS & IMPORTANT NOTES

COPYRIGHT NOTICE.

Cambridge Audio Azur 540A Amplifier V2.0

IC Pin Layout Details

Input PCB

Power Amp PCB

Front Panel & Mains PCB

A-BUS PCB

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