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.
3
LASER SAFETY PRECAUTIONS
y
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.
CLASS 1 LASER PRODUCT
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.
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 b
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.
4
5
Cambridge Audio Azur 640C V2 CD Player
CN2
CONN-H8
CN3
CONN-H8
CN4
CONN-H7
CN7
CONN-H7
CN8
MCLK_LOCK
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
+5V
1
RESET
2
PWR DET
3
4
5
6
7
R19
1
4K7
2
Q4
BC337
LCD1
COM0
1
COM1
2
COM2
3
COM3
4
SEG0
5
SEG1
6
SEG2
7
SEG3
8
SEG4
9
SEG5
10
SEG6
11
SEG7
12
SEG8
13
SEG9
14
SEG10
15
SEG11
16
SEG12
17
SEG13
18
SEG14
19
SEG15
20
SEG16
21
SEG17
22
SEG18
23
LCD
PACKAGE=LCD D600
+5V
R15
100R
C5
10U 16V EL
K1
C2
1n 50V X7R
K2
C3
1n 50V X7R
C4
100n 50V X7R
R6
10K
R11
3K3
SW1
PLAY/PAUSE
SW3
OPEN/CLOSE
U2
+5V
3
GND
2
OPT
1
IR REC 3/5V 36KHZ
R5
2K7
R10
68K
SW2
STOP
R3
27KR433K
+5V
FORWARD SKIPFORWARD SEARCH
R8
1K5
BACKWARD SKIPBACKWARD SEARCH
1
2
3
4
5
6
7
U3
PIC16C505
C1
100n 50V X7R
VDD
RB5/OSC1/CLKIN
RB4/OSC2/CLKOUT
RB3/MCLR/VPP
RC5/TOCKI
RC4
RC3
R9
82K
R7
82K
C6
10uF 10V EL
14
VSS
13
RB0
12
RB1
11
RB2
10
RC0
9
RC1
8
RC2
SW6
SW-TACT
CN1
CONN-H2
R2
5K6
+5V
SW4
SW-TACT
D1
1N5819
1
2
R22
10k
R16
4k7
R12
4K7
Q2
BC327
+5V
R17
5K6
SW5
SW-TACT
+5V
R13
10K
R18
2K2
Q3
BC337
CN5
CONN-H3
CN6
CONN-H3
1
2
3
R14
220R
D2
LED 3MM BLUE
1
2
3
R1
220R
P2
PAD
P1
PAD
Q1
BC337
R20
82R
R21
1
CCW
2
CW
3
100R
To enhance viewing, please print to A36
AP175163 Front Panel PCB Schematic
Cambridge Audio Azur 640C V2 CD Player
To enhance viewing, please print to A37
AP175164 Front Panel PCB Layout (Top Side)
Cambridge Audio Azur 640C V2 CD Player
To enhance viewing, please print to A38
AP175164 Front Panel PCB Layout (Bottom Side)
Cambridge Azur 640C V2 Front Panel PCB Assembly BOM
AP PART
NO
PY214BC337-25NPN small signal transistor TO-923Q1, 3, 41300-337000-100
PY219BC327-25PNP small signal transistor TO-921Q21301-327000-100
PY054TSOP1836SS3V IR Receiver module (VISHAY)1U23001-183600-001
PD0121N5819Schottky diode1D1
PY064Blue LED3mm Blue flat top LED1D23100-000030-003
82R0.25W 1% Metal Film Resistor1R201011-002014-000
100R0.25W 1% Metal Film Resistor2R151011-001014-000
220R0.25W 1% Metal Film Resistor2R1, 141012-201014-000
1K50.25W 1% Metal Film Resistor1R81011-502014-000
2K20.25W 1% Metal Film Resistor1R18
2K70.25W 1% Metal Film Resistor1R51012-702014-000
3K30.25W 1% Metal Film Resistor1R111013-302014-000
4K70.25W 1% Metal Film Resistor3R12, 16, 191014-702014-000
5K60.25W 1% Metal Film Resistor2R2, 17
10K0.25W 1% Metal Film Resistor3R6, 13, 221011-003014-000
27K0.25W 1% Metal Film Resistor1R31012-703014-000
33K0.25W 1% Metal Film Resistor1R41013-303014-000
68K0.25W 1% Metal Film Resistor1R101016-803014-000
82K0.25W 1% Metal Film Resistor2R7, 91018-203014-000
100R Multi turn pot1R21
ValueDescriptionQtyComponent IdentFactory Part NoNotes
Resistors
82R0.25W 1% Metal Film Resistor1R201011-002014-000
100R0.25W 1% Metal Film Resistor2R151011-001014-000
220R0.25W 1% Metal Film Resistor2R1, 141012-201014-000
1K50.25W 1% Metal Film Resistor1R81011-502014-000
2K20.25W 1% Metal Film Resistor1R18
2K70.25W 1% Metal Film Resistor1R51012-702014-000
3K30.25W 1% Metal Film Resistor1R111013-302014-000
4K70.25W 1% Metal Film Resistor3R12, 16, 191014-702014-000
5K60.25W 1% Metal Film Resistor2R2, 17
10K0.25W 1% Metal Film Resistor3R6, 13, 221011-003014-000
27K0.25W 1% Metal Film Resistor1R31012-703014-000
33K0.25W 1% Metal Film Resistor1R41013-303014-000
68K0.25W 1% Metal Film Resistor1R101016-803014-000
82K0.25W 1% Metal Film Resistor2R7, 91018-203014-000
VALUEDESCRIPTIONQTYCOMPONENT IDENTFACTORY PART NONOTES
RESISTORS
10R0.25 W Metal Film Resistor1R401011-000014-000
15R0.125 W Metal Film Resistor1R62
27R1 W Carbon Resistor1R671002-700310-000mount off PCB by 5mm
47R0.125 W Metal Film Resistor1R10,1014-700018-000
100R0.125 W Metal Film Resistor1wirelink1011-001016-000
220R0.125 W Metal Film Resistor1R41012-201018-000
470R0.125 W Metal Film Resistor2R33, 341014-701016-000
1K0.125 W Metal Film Resistor5R3, 20, 21, 25, 601011-002018-000
2K20.125 W Metal Film Resistor2R1, 66 1012-202016-000
3K30.125 W Metal Film Resistor7R19, 41, 42, 44, 45, 46, 471013-302018-000
4K70.125 W Metal Film Resistor2R32, 761014-702016-000
10K0.125 W Metal Film Resistor26
15K0.125 W Metal Film Resistor1R5,1011-503018-000
27K0.125 W Metal Film Resistor1R61
47K0.125 W Metal Film Resistor5R9, 48, 49, 50, 511014-703016-000
56K0.125 W Metal Film Resistor2R52, 57
68K0.125 W Metal Film Resistor2R7, 591016-803018-000
82K0.125 W Metal Film Resistor1R59 1018-203018-000
100K0.125 W Metal Film Resistor1R63 1011-004016-000
220K0.125 W Metal Film Resistor1R6 1012-204016-000