Cambridge Audio 340C Schematic

340C

Issue Date: 30th November 2004

________________________________________________________________________

SERVICE MANUAL

________________________________________________________________________
SPECIFICATIONS:

D/A Converter Crystal
CS4338
24-Bit/96kHz
Capable

Freq response (-0.5dB) 10Hz to 20kHz

THD 0.007%
Dynamic Range > 89dB
Digital Outputs Opt and Coax
Dimensions mm (HxWxD) 70 x 430 x 310
Weight (kg) 4.6

AP16820/1

Gallery Court Hankey Place London SE1 4BB UK

Tel: [phone] Fax: [phone]

340C SERVICE MANUAL

TABLE OF CONTENTS

Safety Precautions & Important Notes 3
Laser Safety Precautions 4
Exploded Assembly Drawing 5
Front Panel PCB Schematic 6
Front Panel PCB Layout (Top Side) 7
Front Panel PCB Layout (Bottom Side) 8
Output PCB Schematic 9
Output PCB Layout (Top Side) 10
Output PCB Layout (Bottom Side) 11
Mains PCB Schematic 12
Mains PCB Layout (Top Side) 13
Mains PCB Layout (Bottom Side) 14
Servo PCB Schematic
Servo PCB Schematic (Power Supply) 16
Servo PCB Layout (Top Side)
Servo PCB Layout (Bottom Side) 18
Front Panel PCB BOM 19
Output PCB BOM 20
Main Assembly BOM 21/22
Servo PCB BOM 23/24
IC Pin Layout Details 25-29

15

17

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.

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 Audio 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.

8

Drawing ref AP part Factory ref Description

1 CA new side panel

7

6

5

4

3

2

REV

1

EDITOR

GTL

1

REVISIONS & DATE

DATE

26/11/04

2 CA new plastic insert rear

2

6

15

11

5

16

4

3 CA new plastic insert front
4 CA new back panel
5 PY507 6550-010204-000-01 Azur 640C Top Panel Black

F

5 PY508 6550-010204-000-02 Azur 640C Top Panel Silver
6 PY515 7002-608010-001 Screw M2.6 x 8 M/C Torx Recessed 1/K Head Black

REVISIONS NOTES:-

F

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

1: ORIGINAL DRAWING 26/11/04.

7 PY792 6564-010001-000A04 Azur-340C FRONT PANEL Silver (Aluminium panel)
7 PY786 6564-010001-000-04 Azur-340C aluminium FRONT PANEL-Black W/S Cool grey 7C
8 PY791 8534-001010-301 Azur-340C Complete FRONT PANEL ASSY (Silver) REV A
8 PY785 8534-001020-301 Azur-340C Complete FRONT PANEL ASSY (BLACK) REV A

9 PY563 3200-576690-100 TRANSFORMER 115V/230V AC10V/2A 16*2/0.5A ES-57-669
10 PY541 6050-150010-000A01 PLASTIC FOOT GREY PAINT SILVER
10 PY531 6050-150010-000 PLASTIC FOOT BLACK (AP126522)
11 PY340 9692-006002-101 Mechan Assy (PU92TL-210) W/Sony KSM213CCM ReV A
12 PY790 3009-213000-000 Sony laser assy KS213CCM
13 PY719 6050-150012-000-01 7MM TAC SWITCH BUTTON (BLACK)
13 PY720 6050-150012-000A01 7MM TAC SWITCH BUTTON (SILVER)

E

14 PY704 6600-170104-000 CA NEW RANGE AMP 7MM TAC SWITCH CUSHION

E

15 PY787 9434-001000-011 Azur-340C MAIN BOARD ASSY (AP146471) REV A
16 PY789 9434-001000-531 Azur-340C OUTPUT BOARD ASSY AP14647/4 REV A
17 PY788 9434-001000-071 Azur-340C 230V POWER PCB ASSY REV A
18 PY573 9805-064001-000 Azur-340/540/640AC REMOTE CONTROL ASSY
19 PY544 6600-170100-000 FOOT PAD FOR Azur-640A
20 PY568 6564-010006-000A01 Azur-640C.Silver CD DOOR W/SILKSCREEN PMS COOL GREY 7C
20 PY554 6564-010006-000-01 Azur-640C.Black CD DOOR W/SILKSCREEN PMS COOL GREY 7C
21 PY552 3110-064580-100 LCD DISPLAY ISO6458P01V0 113*25.7MM NEGATIVE (BLACK UNIT)
21 PY562 3110-064580-000 LCD DISPLAY ISO6458P00V0 113*25.7MM POSITIVE (SILVER UNIT)
22 PY556 9464-001000-041 Azur-540C & 640C CONTROL BOARD ASSY REV A

Note:user manual is downloadable from our www.cambridge-audio.co.uk

D

D

17

20

12

9

C

C

22

21

DRAWING NOTES:-

B

B

1

7

8

3

A

COPYRIGHT
AUDIO PARTNERSHIP PLC

14

8

7

6

13

19

5

10

18

4

3

3 GALLERY COURT
HANKEY PLACE
LONDON SE1 4BB
TEL: [phone]
FAX: [phone]
E-MAIL grahame@audiopartnership
E-MAIL nick@audiopartnership
E-MAIL simon.freeth@audiopartnership

PROJECTION

THIRD ANGLE

2

UNLESS OTHERWISE SPECIFIED:

DIMENSIONS ARE IN MM's
TOLERANCES:
WHOLE NO.s IE 75 0.5mm
1 DECIMAL IE 75.5 0.2mm

ANGULAR

MATERIAL:

FINISH:

0.1mm2 DECIMAL IE 75.75

0.5

--

--

PROPRIETARY AND CONFIDENTIAL

THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF
AUDIO PARTNERSHIP PLC.

ANY REPRODUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN PERMISSION
OF AUDIO PARTNERSHIP IS PROHIBITED.

AUDIO PARTNERSHIP PLC

TITLE:

340C EXPLODED ASSEMBLY
DRAWING.

SIZE

A0

1:5SCALE:

DWG. NO.

AP16809/1

DO NOT SCALE FROM DRAWING

1

OF 1SHEET

A

1

Cambridge Audio Azur 340C CD Player

CN2

CONN-H8

CN3

CONN-H8

CN4

CONN-H7

CN7

CONN-H7

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

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

330R

C4

100n

R6

K1

10K

C2

1000p

R11

K2

3K3

C3

1000p

SW1

PLAY/PAUSE

SW3

OPEN/CLOSE

U2

+5V

3

GND

2

OPT

1

TSOP18 IR RECEI

R5

2K7

R10

68K

SW2

STOP

R3

27KR433K

+5V

FORWARD SKIP FORWARD SEARCH

R8

1K5

BACKWARD SKIP BACKWARD SEARCH

U3

1
2
3
4
5
6
7

16C505

C1

100n

VDD

RB5/OSC1/CLKIN

RB4/OSC2/CLKOUT

RB3/MCLR/VPP

RC5/TOCKI

RC4

RC3

R9

82K

R7

82K

C6

10uF 10V

14

VSS

13

RB0

12

RB1

11

RB2

10

RC0

9

RC1

8

RC2

SW6

SW-TACT

CN1

CONN-H2

SW4

SW-TACT

1
2

R12

4K7

Q2

BC327

SW5

SW-TACT

+5V

R13

10K

CN5

CONN-H3

CN6

CONN-H3

1
2
3

R14

820R

D2

LED
Standby

1
2
3

R1

820R

P2

PAD

P1

PAD

R16

33R

Q1

BC337

R2

1K8

D1

1N4148

D3

1N4148

AP12992/3 Front Panel PCB Schematic

PGND

Cambridge Audio Azur 340C CD Player

AP12992/3 Front Panel PCB Layout (Top Side)

Cambridge Audio Azur 340C CD Player

AP12992/3 Front Panel PCB Layout (Bottom Side)

Cambridge Audio Azur 340C CD Player

CN2

Analogue O/P

U2:B

3 4

74HC14

U2:C

5 6

DGND

DOUT

R1

VCC

1
2
3

3

R3

47R

3
2
1

C6

4.7n cer
EMC

CN1:B

ZUANBAOAV2-8,4-13EL

C1

RIGHT CHANNEL

4.7n cer
EMC

C2

4.7n cer
EMC

4

1

2

CN1:A

ZUANBAOAV2-8,4-13EL

LEFT CHANNEL

AGND

Data In

+5V

CN3

74HC14

U2:D

13 12

74HC14

100R

R2

10R

C9

C4

100nF

100nF

GND

U2:F

9 8

74HC14

U2:A

1 2

74HC14

U2:E

11 10

74HC14

C5

10u 16V

DGND

R32

430R

2

3
1

C3

100nF

U1

VCC

INPUT

GND

APTX179AT

R31

FB1

FERRITE BEAD 5uH

C7

91R

330pFC8330pF

FB2

FERRITE BEAD 5uH

C25

100nF

DGND

CN4

ZUANBAO AV-8,4-8ES

3

1 2

C26

100nF

AP14644/4 Output PCB Schematic