Cambridge Audio 340A Service Manual
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Also See for 340A:
- User manual (114 pages) ,
- Brochure & specs (21 pages) ,
- Supplementary manual (1 page)
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Table of Contents
- 1 Service Manual
- 2 Table of Contents
- 3 Safety Precautions & Important Notes
- 4 Main Assembly BOM
- 5 Micro Controller PCB Schematic (Pic's/Switches/Led's)
- 6 Main PCB Schematic (Input Select)
- 7 Main PCB Schematic (Power Amplifiers)
- 8 Main PCB Schematic (Power Supplies)
- 9 Main PCB Schematic (Tone Control)
- 10 Main PCB BOM
- 11 IC Pin Layout Details
- Download this manual
See also:
User Manual
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Issue Date: 18
June 2004
________________________________________________________________________
SERVICE MANUAL
________________________________________________________________________
SPECIFICATIONS:
Power Output
Max Power Consumption
Total Harmonic Distortion
Frequency Response (-1dB)
S to N Ration (unweighted)
Slew Rate (into 8Ω)
Dimensions (HxWxD)
mm
Inches
Weight
Kg
Lbs
Gallery Court Hankey Place London SE1 4BB UK
Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233
40W (into 8Ω)
50W (into 4Ω)
345W
1kHz < 0.009%
20kHz < 0.09%
5Hz – 50kHz
99dB
20V/uS
70 x 430 x 310
2.8 x 16.9 x 12.2
6.2
13.6
340A
AP15844/1
1
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Table of Contents
Related Manuals for Cambridge Audio 340A
Summary of Contents for Cambridge Audio 340A
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Page 1: Service Manual
340A Issue Date: 18 June 2004 ________________________________________________________________________ SERVICE MANUAL ________________________________________________________________________ SPECIFICATIONS: Power Output 40W (into 8Ω) 50W (into 4Ω) Max Power Consumption 345W Total Harmonic Distortion 1kHz < 0.009% 20kHz < 0.09% Frequency Response (-1dB) 5Hz – 50kHz S to N Ration (unweighted) 99dB Slew Rate (into 8Ω) -
Page 2: Table Of Contents
340A SERVICE MANUAL TABLE OF CONTENTS Safety Precautions & Important Notes Main Assembly BOM Micro controller PCB Schematic (PIC’s/Switches/LED’s) Micro controller PCB Layout (Top Side) Micro controller PCB Layout (Bottom Side) Front Panel PCB Assembly BOM Main PCB Schematic (Input Select) -
Page 3: Safety Precautions & Important Notes
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. -
Page 4: Main Assembly Bom
AP14861/4 Cambridge Azur 340A Main Assembly BOM AP PART DRAWING NO DESCRIPTION COMMENTS Chassis Assembly AP14160/1 Bottom Panel PY541 AP12652/2 Foot Moulding Silver Position In Place on Bottom Panel PY544 AP12883/3 Foot Pad Affix on Foot Using Adhesive Surface M3 X 8 Plastite Pozi Pan Fix Feet To Bottom Panel. - Page 5 AP14865/1 Cambridge Azur 340A Microcontroller From Main PCB J2 to Front Panel PCB CN2 Cableform AP14896/1 Cambridge Azur 340A Volume Control From Front Panel PCB CN5 to Volume Pot Motor Cableform AP15204/1 Cambridge Azur 340A Earth Lead From earth pin of IEC Scoket (CN3) on main PCB to Chassis...
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Page 6: Micro Controller Pcb Schematic (Pic's/Switches/Led's)
Cambridge Azur 340A Intergrated Amplifier 6 mA 220R 220R AUX/PHONO TUNER/DAB AV/MD TAPE MON 100K IN-CIRCUIT PROGRAMMING CONNECTOR Data I/O CHANNEL LED CHANNEL LED CHANNEL LED CHANNEL LED CHANNEL LED CHANNEL LED 100n DGND DGND HI = NORMAL MCLR/Vpp DC OFFSET... - Page 7 Cambridge Azur 340A Intergrated Amplifier To enhance viewing, please print to A3 AP14518/1 Microcontroller PCB Board Layout (Top Side)
- Page 8 Cambridge Azur 340A Intergrated Amplifier To enhance viewing, please print to A3 AP14518/1 Micrcontroller PCB Board Layout (Bottom Side)
- Page 9 AP15185/3 Cambridge Azur 340A Front Panel PCB BOM AP PART DRAWING No DESCRIPTION DESIGNATOR COMMENTS Resistor 0.25W 1% metal film 220R Resistor 0.25W 1% metal film R3, R4 100K Resistor 0.25W 1% metal film 100nF Ceramic NP0 or C0G 10%...
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Page 10: Main Pcb Schematic (Input Select)
Cambridge Azur 340A Intergrated Amplifier LEFT RIGHT 100nF 100V MAINS GND 100R CN9:B CN9:A DUAL PHONO DUAL PHONO 220K 220K 220K 220K 220K 220K 220K 220K 220K 220K -15V +15V 220K 220K 47n poly 47n poly +15V 100R 100R 100R... -
Page 11: Main Pcb Schematic (Power Amplifiers)
Cambridge Azur 340A Intergrated Amplifier +28V POWER AMPLIFIER LEFT RSW1 RSW2 100U 50V HR 220R 3W C POWER AMP LEFT 220R 3W C 470R 10U 16V LSW2 LEFT: SPEAKER A 470R 1W C LSW1 CN2:C 12V 8A RELAY RES2W 2R2... -
Page 12: Main Pcb Schematic (Power Supplies)
Cambridge Azur 340A Intergrated Amplifier MAINS SWITCH PCB FROM TRANSFORMER earth 20MM T6.3AL or 3.15AL BROWN/BLACK T6A3 AL KDC-A04-10 TERMINAL 1N5402 LVD! +28V X1 10n IEC-SOC TO MAINS TRANSFORMER 1N5402 6800uF-50V MAINS GND X2 470N SUPPRESSION X2 470N SUPPRESSION TERMINAL... -
Page 13: Main Pcb Schematic (Tone Control)
Cambridge Azur 340A Intergrated Amplifier SW1:B VR2:A 47u 16V TREBLE B20K LINEAR SW-DPDT DEFEAT 150k 330p poly VR1:A R CH IN 20K MOTORISED DUAL POT +15V VR4:B VR3:A 47u 16V B20K LINEAR 47n poly POWER AMP RIGHT 150k U2:A BASS... - Page 14 Cambridge Azur 340A Intergrated Amplifier To enhance viewing, please print to A3 AP14476/4 Main PCB Board Layout (Top Side)
- Page 15 Cambridge Azur 340A Intergrated Amplifier To enhance viewing, please print to A3 AP14476/4 Main PCB Board Layout (Bottom Side)
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Page 16: Main Pcb Bom
Cambridge Azur 340A Main PCB BOM AP151734 AP PART DRAWING NO DESCRIPTION DESIGNATOR NOTES 2W Metal Film R48, R67 Stand off PCB by 5mm 2W Metal Film R56, R68 Stand off PCB by 5mm 100R 0.25 W 1% Metal Film... - Page 17 AP PART DRAWING NO DESCRIPTION DESIGNATOR NOTES 1N5402 General Purpose Rectifier D1-D4 1N4002 General Purpose Rectifier D5-D8 1N4001 General Purpose Rectifier 1N4148 High Speed Signal D10-D15 BZX85-C5V1 Zener 400mW PY649 T6.3AL 6.3A time delay Fuse-20mm low F1, F2 Secondary fuses breaking capacity PY595 T3.15AL...
- Page 18 AP PART DRAWING NO DESCRIPTION DESIGNATOR NOTES PY645 2402-020200-010 SW-DPDT SW1, SW2 As 540A amplifier PY227 KDC-A04-10 Mains switch 10A 250V TV-8 mains switch Gerber AP14477/4 Schematic AP14476/4 Please mark board POP REV A Gerber file is AP14477/4 PCB Construction details AP14478/4 NOTES: Note 1: C23, C39 Components not fitted...
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Page 19: Ic Pin Layout Details
Cambridge Audio Azur 340A Amplifier IC Pin Layout Details Front Panel PCB PIC16F72-I/SP (U1) BA6218 (U2) TSOP1836/37 (U3) - Page 20 Main PCB NE5532 (U1 & U2) TC9163AF (U4) LM3886T (U6 & U7)
- Page 21 AP158421 Cambridge Azur 340A Silver - Black Diffrences BOM AP PART DRAWING DESCRIPTION COMMENTS CARTON LABEL (MODEL NO.) UK BLACK FOR BOX PY593 CAMBRIDGE SELECTOR KNOB MK3 Black PY591 CAMBRIDGE NEW RANGE AMP VOLUME KNOB Black CAMBRIDGE FRONT PANEL (PUNCHED AND PRINTED)