Cambridge Audio Azur 640P User manual

Gallery Court Hankey Place London SE1 4BB UK
Tel: [phone] Fax: [phone]
640P/540P
Issue Date: 23rd August 2005
________________________________________________________________________
SERVICE MANUAL
________________________________________________________________________
SPECIFICATIONS:
540P 640P 640P
(MM) (MC)
Max Power Consumption 5W 5W 5W
Gain @ 1kHz 39dB 39dB 55dB
Input Impedance 47k 47k 100R
Nominal Output 300mV 300mV 300mV
Sensitivity for Nominal Output 3.35mV 3.35mV 0.5mV
THD 20Hz-20kHz 0.009% 0.005% 0.002%
RIAA Curve Accuracy +/-0.65dB <+/-0.3dB <+/-0.3dB
25Hz-20kHz 20hz-50kHz 20Hz-50kHz
(Subsonicfilteroff)
Signal to Noise Ratio >85db >86dB >72dB
Using Audio Precision RIAA-1
with grounded inputs.
Crosstalk @ 20kHz >76dB >83dB >69dB
Dimensions (HxWxD)
mm 46x215x133 46x215x133 46x215x133
inches 1.8x8.5x5.2 1.8x8.5x5.2 1.8x8.5x5.2
Weight
kg 0.8 0.9 0.9
lbs 1.8 2 2
AP18705/1
1

540P & 640P SERVICE MANUAL
TABLE OF CONTENTS
Safety Precautions & Important Notes 3
540P/640P Main Assembly BOM 4
540P Main PCB Schematic 5
540P Main PCB Layout (Top Side) 6
540P Main PCB Layout (Bottom Side) 7
540P Main PCB BOM 8-9
640P Main PCB Schematic 10
640P Main PCB Layout (Top Side) 11
640P Main PCB Layout (Bottom Side) 12
640P Main PCB BOM 13-15
ICPinLayoutDetails 16
2

SAFETY PRECAUTIONS & IMPORTANT NOTES
1.Check that the rear of the product indicates the correct supply voltage
for you 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 of 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

AP15869/2 & AP16524/3
AP PART NO
A
P DRAWING
NO DESCRIPTION QTY NOTES
AP14509/2 Azur 540.640P User's Manual Multi-Language - 1 5100-549900-100
AP15655/1 Azur 640/640P Woven Bag 1 5299-262191-300
PY912 EU PSU Unit 1 GPG411200500WA00
PY913 CU PSU Unit 1 GPU351200500WA00
PY868 Australia / NZ PSU Unit 1 GPS411200500WA01
PY867 UK PSU Unit 1 GPB411200500WA00 (4021-411200-107)
Cambridge Audio Azur 540P / 640P Phono Stage Main Assembly BOM
Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the
manufacturer. Please obtain these locally.
4

Cambridge Audio Azur 540P Phono Stage
AP15219/4 Main PCB Schematic
C1
220u 50V
D2
1N4004
D3
1N4004
C3
220u 50V
C5
220u 50V
D4
1N4004
C6
220u 50V
VI
1VO 3
GND
2
U1
7818
C7
47N POLYESTER
C8
47N POLYESTER
VI
2VO 3
GND
1
U2
7918
C9
100u 25V
C10
100u 25V
+15V
-15V
D6
1N4004
R1
3k3
AK
D7
BLUE_AZUR
COMMENTS=NO STUFF FP
C11
10U 25V
1 3 2
CN1
DCJACK2
C12
4.7u PEST 5%
C13
4.7u PEST 5%
5
6
7
U4:B
NE5532
R2
1k2
R3
3k9
R4
82k
R5
1k8
G1
C15
82n PEST 5%
G1
R6
820R
Sub Filter
AC 12v 500mA
5
6
7
U3:B
NE5532
R7
2k2
Q1
2SA970
R8
100R
R9
4k7
R10
4k7
Q2
2SA970
C16
100U 25V
C17
100U 25V
R11
4k7
R12
1k0
+15V
R13
1k0
C18
100p NPO
R14
47k
C19
220p NPO
MM
3
2
1
84
U3:A
NE5532
R15
2k2
Q3
2SA970
R16
100R
R17
4k7
R18
4k7
Q4
2SA970
C20
100U 25V
C21
100U 25V
R19
4k7
R20
1k0
R21
1k0
- 15V
C22
100p NPO
R22
47k
C23
220p NPO
MM
R23
22R
C24
100u 25V NP
R24
22k
G1
L
L
R
C25
100n Ceramic
C26
100n Ceramic
MM phono input
+V
PAD
-V
PAD
GND
PAD
D8
1N4004
R25
47R
R26
3k9
G1
R27
1k2
R28
220R
G1
R29
7k5
C28
4.7u PEST 5%
C29
4.7u PEST 5%
3
2
1
8 4
U4:A
NE5532
R30
1k2
R31
3k9
C30
39n PEST 5%
R32
82k
R33
1k8
G1
C31
82n PEST 5%
G1
R34
820R
R35
22R
C32
100u 25V NP
R36
22k
G1
R
R37
47R
R38
3k9
G1
R39
1k2
R40
220R
G1
R41
7k5
RIAA
C34
47N POLYESTER
C35
47N POLYESTER
+15V
-15V
C36
47N POLYESTER
C37
47N POLYESTER
-15V
+15V
3
4
5
CN2:B
ZUAN-AV2-8
1
2
5
CN2:A
ZUAN-AV2-8
3
4
5
CN3:B
ZUAN-AV2-8
1
2
5
CN3:A
ZUAN-AV2-8
C38
470n Ceramic
G1
C39
4.7n Ceramic
C40
4.7n Ceramic
LK1
LINK10MM
LK2
LINK10MM
LK3
LINK15MM
LK4
LINK10MM
LK5
LINK10MM
- 15V
- 15V
LK6
LINK10MM
LK7
LINK15MM
1
2
CN5
JST 2,5MM B2B-XH-A
C14
39n PEST 5%
C33
4.7u PEST 5%
C27
4.7u PEST 5%
C41
47N POLYESTER
C42
47N POLYESTER
C2
220u 50V
C4
220u 50V
R42
100R
R43
100R
LK8
LINK10MM
LK9
LINK10MM
86-756-8687998
To enhance viewing, please print to A3 5

Cambridge Audio Azur 540P Phono Stage
AP15219/4 Main PCB Layout (Top Side)
AP15220/4
Superior Performance Moving Magnet Phono Module
86-756-8687998
To enhance viewing, please print to A3 6

Cambridge Audio Azur 540P Phono Stage
AP15219/4 Main PCB Layout (Bottom Side)
86-756-8687998
To enhance viewing, please print to A3 7

AP15222/3
AP PART
NUMBER VALUE DESCRIPTION QTY COMPONENT IDENT NOTES
RESISTORS
22R 0.25W metal film 2 R23, R35
47R 0.25W metal film 2 R25, R37
100R 0.25W metal film 4 R8, R16, R42, R43
220R 0.25W metal film 2 R28, R40
820R 0.25W metal film 2 R6, R34
1K 0.25W metal film 4 R12, R13, R20, R21
1K2 0.25W metal film 4 R2, R27, R30, R39
1K8 0.25W metal film 2 R5, R33
2K2 0.25W metal film 2 R7, R15
3K3 0.25W metal film 1 R1
3K9 0.25W metal film 4 R3, R26, R31, R38
4K7 0.25W metal film 6 R9, R10, R11, R17, R18, R19
7K5 0.25W metal film 2 R29, R41
22K 0.25W metal film 2 R24, R36
47K 0.25W metal film 2 R14, R22
82K 0.25W metal film 2 R4, R32
CAPACITORS
100p NPO Ceramic 5mm Pitch 2 C18, C22
220p NPO Ceramic 5mm Pitch 2 C19, C23
4.7n NPO Ceramic 5mm Pitch 2 C39, C40
39n 5% Polyester Film 5mm Pitch 2 C14, C30
CMEA393J063RB050 Mini Box
metallised polyester 39n 63V 5%
7.3x2.5mm, 5mm pitch.
47n 10% Polyester Film 5mm Pitch 8 C7, C8, C34, C35, C36, C37,
C41, C42
82n 5% Polyester Film 5mm Pitch 2 C15, C31
CMEA823J063RB050 Mini Box
metallised polyester 82n 63V 5% ,
7.3x2.5mm, 5mm
p
itch.
100n Ceramic X7R 5mm Pitch 2 C25, C26
470n Ceramic X7R 5mm Pitch 1 C38
4.7u 5% Polyester Film 25mm Pitch 6 C12, C13, C27, C28, C29, C33
CMEF475J100RB250 Radical
metallised polyester 4.7u 100V 5% ,
28x9mm, 25mm pitch
Cambridge Audio Azur 540P PCB Assembly BOM
Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the
manufacturer. Please obtain these locally.
8

AP15222/3
AP PART
NUMBER VALUE DESCRIPTION QTY COMPONENT IDENT NOTES
Cambridge Audio Azur 540P PCB Assembly BOM
10u 25V Polarised Electrolytic 1 C11
100u 25V Non Polarised Electrolytic 2 C24, C32
100u 25V Polarised Electrolytic 6 C9, C10, C16, C17, C20, C21
220u 50V Polarised Electrolytic 6 C1, C2, C3, C4, C5, C6 Height Restriction 16mm Max
7818 18 volt 1A TO220 Positive Voltage
regulator 1U1 To be mounted on AP15814/1
heatsink/shield
7918 18 volt 1A TO220 Negative
voltage regulator 1U2 To be mounted on AP15814/1
heatsink/shield
PY259 NE5532 8 pin DIL Audio OpAmp 2 U3, U4 4155-320052-100
TRANSISTORS
2SA970 TO92 PNP Very low noise
transistor 4 Q1, Q2, Q3, Q4 1301-970000-100
DIODES
1N4004 Rectifier Diodes 5 D2, D3, D4, D6, D8
SEMICONDUCTORS
Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the
manufacturer. Please obtain these locally.
9

Cambridge Audio Azur 640P MM/MC Phono Stage
AP151197/1 Main PCB Schematic
D2
1N4004
D3
1N4004
D4
1N4004
VI
1
VO
3
GND
2
U1
7818
C7
47n PE 63V
C8
47n PE 63V
VI
2
VO
3
GND
1
U2
7918
+18V
-18V
D6
1N4004
R1
3k3
C11
10U 25V
1 3 2
CN1
DCJACK2
3
2
1
84
U3:A
NE5532
C12
47n PE 63V
C13
47n PE 63V
+18V
-18V
R2
3k9 1/8W
C14
4u7 PE 5%
C15
4u7 PE 5%
R4
3k9 1/8W
5
6
7
U3:B
NE5532
R26
2k2 1/8W
3
2
1
84
U4:A
NE5532
C66
47n PE 63V
C27
47n PE 63V
R27
3k9 1/8W
C28
4u7 PE 5%
C29
4u7 PE 5%
R29
3k9 1/8W
5
6
7
U4:B
NE5532
R51
2k2 1/8W
SW1
SW-2POLE 2WAY
SW2
SW-2POLE 2WAY
Sub Filter
MC/MM
AC 12v 500mA
3
2
1
84
U5:A
NE5532
C40
47n PE 63V
C41
47n PE 63V
R52
1k3 1/8W
R53
1k3 1/8W
Q1
2SA970GR
R54
18R 1/8W
R55
15k 1/8W
R56
15k 1/8W
Q2
2SA970GR
R57
1k3 1/8W
R58
470R
+18V
R59
1k2
-18V
C44
220U NP 6.3V
R60
470R 1/8W
C46
220P PP 63V 5%
3
2
1
84
U6:A
NE5532
R61
910R 1/8W
Q3
2SA970GR
R62
91R 1/8W
R63
11k 1/8W
R64
11k 1/8W
Q4
2SA970GR
C49
220U NP 6.3V
R68
560k 1/8W
C51
220P PP 63V 5%
MC
MM
5
6
7
U5:B
NE5532
C52
47n PE 63V
C53
47n PE 63V
R69
1k3 1/8W
R70
1k3 1/8W
Q5
2SA970GR
R71
18R 1/8W
R72
15k 1/8W
R73
15k 1/8W
Q6
2SA970GR
R74
1k3 1/8W
C56
220U NP 6.3V
R77
470R 1/8W
C58
220P PP 63V 5%
5
6
7
U6:B
NE5532
Q7
2SA970GR
R79
91R 1/8W
R80
11k 1/8W
R81
11k 1/8W
Q8
2SA970GR
C61
220U NP 6.3V
R85
560k 1/8W
C63
220P PP 63V 5%
R86
2k2 1/8W
R87
2k2 1/8W
R88
2k2 1/8W
R89
2k2 1/8W
R47
47k 1/8W
R48
47k 1/8W
L
L
R
R
C25
100n PE 63V
C26
470n PE 63V
D8
1N4004
1
2
5
CN2:A
ZUAN-AV2-8
3
4
5
CN2:B
ZUAN-AV2-8
1
2
5
CN3:A
ZUAN-AV2-8
3
4
5
CN3:B
ZUAN-AV2-8
C68
100n PE 63V
1
2
5
CN4:A
ZUAN-AV2-8
3
4
5
CN4:B
ZUAN-AV2-8
1
2
CN5
JST 2,5MM B2B-XH-A
AK
D9
Red Led Vf=2V
R94
3k 1/8W *2V
MM L
MC L
MM L
MC L
MM R
MC R
MC R
MM R
L
R
Q10
2SA970GR
Q11
2SA970GR
Q12
2SA970GR
Q13
2SA970GR
Q14
2SA970GR
Q15
2SA970GR
Q16
2SA970GR
Q17
2SA970GR
Q18
BC560C
AK
D10
Red Led Vf=2V
R95
3k 1/8W *2V
Q9
BC560C
C54
10N PP 63V
C71
10N PP 63V
C72
10N PP 63V
C73
10N PP 63V
C76
10N PP 63V
C77
10N PP 63V
R65
1k3 1/8W
R66
470R
+18V
AK
D11
Red Led Vf=2V
R100
3k 1/8W *2V
Q23
BC560C
R102
1k3 1/8W
AK
D12
Red Led Vf=2V
R104
3k 1/8W *2V
Q25
BC560C
R67
1k2
-18V
R42
82R
R43
150R
sub
direct
C30
100n PE 63V
C75
22p NPO 50V
R15
130R 1/8W
R16
130R 1/8W
C88
470U NP 6.3V
C89
470U NP 6.3V
R17
51k 1/8W
C90
470U NP 6.3V
R18
51k 1/8W
C91
470U NP 6.3V
C92
47P NPO 50V
C93
47P NPO 50V
C98
33p NPO 50V
C99
33p NPO 50V
R36
910R 1/8W
R37
910R 1/8W
R38
910R 1/8W
R24
1k87 0.1%
C16
10N PP 63V
C45
10N PP 63V
-18V
C59
100n PE 63V
C60
100n PE 63V
C62
100n PE 63V
C67
100n PE 63V
C50
470n PE 63V
C70
470n PE 63V
C79
47n PE 63V
C80
47n PE 63V
R76
47k 1/8W
R78
47k 1/8W
C81
10N PP 63V 1%
C32
10N PP 63V 1%
C33
10N PP 63V 1%
C34
10N PP 63V 1%
R7
1k87 0.1%
C17
10N PP 63V 1%
C18
10N PP 63V 1%
C19
10N PP 63V 1%
C20
10N PP 63V 1%
R8
1K2 1/8W
R9
1K2 1/8W
R13
75K 0.1%
R19
1K 1/8W
C21
10N PP 63V 1%
C22
10N PP 63V 1%
C23
10N PP 63V 1%
C24
10N PP 63V 1%
R22
3.92k 0.1%
R45
1k87 0.1%
C35
22p NPO 50V
R84
1K2 1/8W
R90
1K2 1/8W
C36
10N PP 63V 1%
C37
10N PP 63V 1%
C38
10N PP 63V 1%
C39
10N PP 63V 1%
C69
10N PP 63V
C82
10N PP 63V
R20
1k87 0.1%
R10
75K 0.1%
R12
1K 1/8W
R14
3.92k 0.1%
R5
47R 1/8W
R6
47R 1/8W
R21
47R 1/8W
R23
47R 1/8W
R3
1k6 1/8W
R28
1k6 1/8W
D1
1N4004
R30
100R 1/8W
R31
15k 1/8W
D5
1N4148
Q19
BC560C
R39
1k 1/8W
R40
220k 1/8W
R41
220k 1/8W
R44
51k 1/8W
Q20
MPSA14
1
2RL1:A
RELAY
3
4
5
RL1:B
RELAY
6
7
8
RL1:C
RELAY
D7
1N4004
R46
390R 2W Carbon
AC Sense
AC Sense
+18V
Unreg
C95
1u 50V
C31
47U NP 16V
C64
47U NP 16V
Av=147
Av=23
R49
No Stuff
R82
No Stuff
Q21
2SA970GR
Q22
2SA970GR
Q24
2SA970GR
Q26
2SA970GR
Q27
2SA970GR
Q28
2SA970GR
Q29
2SA970GR
Q30
2SA970GR
D13 1N4004
C2
1000U 35V EL
C4
1000U 35V EL
C55
1000U 25V EL
AC Sense
C9
100U 25V EL
C10
100U 25V EL
C57
470U 25V EL
C65
470U 25V EL
R11
100R
R25
100R
+18V
-18V
C83
470U 25V EL
C84
470U 25V EL
R50
100R
R75
100R
C1
330U 50V EL 105D
C6
330U 50V EL 105D
C3
330U 50V EL 105D
C5
330U 50V EL 105D
R83
220k 1/8W
R91
220k 1/8W
LK1
LINK10MM
LK2
LINK10MM
LK3
LINK10MM
FB1
FERRITE BEAD
FB2
FERRITE BEAD
FB3
FERRITE BEAD
FB4
FERRITE BEAD
LK4
LINK10MM
LK5
LINK10MM
C42
1000U 25V EL
C43
1000U 25V EL
C47
1000U 25V EL
C48
1000U 25V EL
R32
180k
0805
R33
180k
0805
C94
100U 25V EL
86-756-8687998
To enhance viewing, please print to A3 10

Cambridge Audio Azur 640P MM/MC Phono Stage
AP151199/1 Main PCB Layout (Top Side)
AP15120/6
Ultimate Performance Universal Phono Module
Power LED
MM Input Output
12V~ 0.5A
MC Input
+18V -18V
86-756-8687998
To enhance viewing, please print to A3 11

Cambridge Audio Azur 640P MM/MC Phono Stage
AP151199/1 Main PCB Layout (Bottom Side)
86-756-8687998
To enhance viewing, please print to A3 12

AP151224
AP PART
NO VALUE DESCRIPTION TOLERANCE FACTORY PART
NO QTY COMPONENT IDENT NOTES
18R 0.125W metal film 1% 2 R54, 71
47R 0.125W metal film 1% 4 R5, R6, R21, R23
91R 0.125W metal film 1% 2 R62, 79
100R 0.125W metal film 1% 1 R30
130R 0.125W metal film 1% 2 R15, 16
470R 0.125W metal film 1% 2 R60, 77
910R 0.125W metal film 1% 4 R36, 37, 38, 61
1K 0.125W metal film 1% 3 R12, 19, 39
1K2 0.125W metal film 1% 4 R8, 9, 84, 90
1K3 0.125W metal film 1% 8
R52
,
53
,
57
,
65
,
69
,
70
,
74
,
102
1K6 0.125W metal film 1% 2 R3, 28
2K2 0.125W metal film 1% 6 R26, 51, 86, 87, 88, 89
3K 0.125W metal film 1% 4 R94, 95, 100, 104
3K9 0.125W metal film 1% 4 R2, 4, 27, 29
11K 0.125W metal film 1% 4 R63, 64, 80, 81
15K 0.125W metal film 1% 5 R31, 55, 56, 72, 73
47K 0.125W metal film 1% 4 R47, 48, 76, 78
51K 0.125W metal film 1% 3 R17, 18, R44
220K 0.125W metal film 1% 4 R40, 41, 83, 91
560K 0.125W metal film 1% 2 R68, 85
82R 0.25W metal film 1% 1 R42
100R 0.25W metal film 1% 4 R11, 25, 50, 75
150R 0.25W metal film 1% 1 R43
470R 0.25W metal film 1% 2 R58, 66
1K2 0.25W metal film 1% 2 R59, 67
3K3 0.25W metal film 1% 1 R1
1K87 0.25W metal film 0.10% 4 R7, 20, 27, 45
3.92K 0.25W metal film 0.10% 2 R14, 22
75K 0.25W metal film 0.10% 2 R10, 13
180k 0805 Thick Film 1% 2 R32, 33
270R 2W Carbon Film 10% 1 R46
22pF 50V NP0 Ceramic 5% 1181-220042-000 2 C35, 75
33pF 50V NP0 Ceramic 5% 2 C98, 99
47pF 50V NP0 Ceramic 5% 1181-470042-000 2 C92, 93
220pF 63V Polypropylene 5% 1114-221062-000 4 C46, 51, 58, 63
10nF 63V Polypropylene 5% 1114-103062-000 10 C16, 45, 54, 69, 71, 72, 73,
76, 77, 82
10nF 63V Polypropylene 1% 16 C17-C24, 32, 33, 34, 36, 37,
38, 39, 81
6.3mm x 11mm x
5mm
47nF 63v Polyester Film 10% 1117-473053-000 12 C7, 8, 12, 13, 27, 40, 41, 52,
53, 66, 79, 80
100nF 63v Polyester Film 10% 1117-104053-000 7 C25,C30, 59, 60, 62, 67, 68
470nF 63V Polyester Film 10% 3 C26, 50, 70
4.7uF 100V Polyester Film 5% 1117-475062-000 4 C14, 15, 28, 29 CMEF475JI00RB250
1uF 50V Polarised Electrolytic 20% 1102-107044-000 1 C95
Cambridge Audio Azur 640P PCB Assembly BOM
RESISTORS
CAPACITORS
Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the
manufacturer. Please obtain these locally.
13

AP151224
AP PART
NO VALUE DESCRIPTION TOLERANCE FACTORY PART
NO QTY COMPONENT IDENT NOTES
Cambridge Audio Azur 640P PCB Assembly BOM
10uF 25V Polarised Electrolytic 20% 1102-100024-000 1 C11
100uF 25V Polarised Electrolytic 20% 1102-101024-000 3 C9, 10, 94
330uF 50V Polarised Electrolytic 20% 4 C1, 3, 5, 6 High Temperature 105
Degrees C
470uF 25V Polarised Electrolytic 20% 4 C57, 65, 83, 84
1000uF 25V Polarised Electrolytic 20% 1102-102024-000 5 C42, 43, 47, 48, 55
1000uF 35V Polarised Electrolytic 20% 1102-102034-000 2 C2, 4
47uF 16V Non Polarised
Electrolytic 20% 2 C31, 64
220uF 6.3V Non Polarised
Electrolytic 20% 4 C44, 49, 56, 61
470uF 6.3V Non Polarised
Electrolytic 20% 4 C88, 89, 90, 91
7818 18 volt 1A Positive
Voltage regulator 4178-180302-600 1 U1
Mount on AP15814/1
heatsink TO220 Silipad
and Insulating Bush
7918 18 volt 1A Negative
voltage regulator 4179-180302-600 1 U2
Mount on AP15814/1
heatsink with TO220
Silipad and Insulating
Bush
NE5532 Audio OpAmp 4155-320052-900 4 U3, 4, 5, 6
2SA970GR PNP Very low noise 1301-970000-100 24
Q1, 2, 3, 4, 5, 6, 7, 8, 10, 11,
12, 13, 14, 15, 16, 17, 21,
22, 24, 26, 27, 28, 29, 30
Top of transistor must
not be higher than
8.5mm from PCB
BC560C PNP Low noise 5 Q9, 18, 19, 23, 25
Top of transistor must
not be higher than
8.5mm from PCB
MPSA14 NPN Darlington 1 Q20
DIODES
1N4004 Rectifier Diodes 1401-140040-000 8 D1, 2, 3, 4, 6, 7, 8, 13
1N4148 Signal Diodes 1401-141480-000 1 D5
MRB32C Red Led 4 D9, 10, 11, 12
Must be specified type
only
NO ALTERNATIVES
TO BE USED, Top of
transistor must not be
higher than 8.5mm
from PCB
2 Way
Horizontal
GOLD plated RCA
socket 2330-004911-003 3 CN2, 3, 4 AV2-8.4-14/EC
2 Way PCB socket 2300-002100-003 1 CN5
LED cable assembly
plugs into here (Part
No. B2B-XH-A)
PCB/Chassis mount
power socket 2303-003911-300 1 CN1 RDC-020-14A
TRANSISTORS
CONNECTORS
SEMICONDUCTORS
Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the
manufacturer. Please obtain these locally.
14

AP151224
AP PART
NO VALUE DESCRIPTION TOLERANCE FACTORY PART
NO QTY COMPONENT IDENT NOTES
Cambridge Audio Azur 640P PCB Assembly BOM
1uH Ferrite Bead on
24AWG 1503-000000-100 4 FB1, 2, 3, 4
24AWG Tinned Copper Link
Wire 5 LK1, 2, 3, 4, 5 10mm LINK
PY584 ME2-5S Relay 4050-000005-002 1 RL 1
2 pole 2 way switch 2 SW1, 2 SS004P022YPF8
MISCELLANEOUS
Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the
manufacturer. Please obtain these locally.
15

Cambridge Audio Azur 540P/640P IC Pin Layout
Details
Main PCB
540P/640P - 7818 (U1)
540P/640P - 7918 (U2)
540P - NE5532 (U3 & U4)
640P - NE5532 (U3, U4, U5 & U6)
540P - 2SA970GR (Q1, 2, 3, 4)
640P - 2SA970GR (Q1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14,
15, 16, 17, 21, 22, 24, 26, 27, 28, 29, 30)
16