Cambridge Audio 340A-SE Schematic
1
340A SE
Issue Date: 9th August 2006
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SERVICE MANUAL
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SPECIFICATIONS:
Power Output 45W (into 8Ω)
55W (into 4Ω)
Max Power Consumption 360W
Total Harmonic Distortion 1kHz < 0.01%
20kHz < 0.01%
Frequency Response (-1dB) 5Hz – 50kHz
S to N Ration (unweighted) 92dB
Slew Rate (into 8Ω) 20V/uS
Dimensions (HxWxD)
mm 70 x 430 x 310
Inches 2.8 x 16.9 x 12.2
Weight
Kg 6.2
Lbs 13.6
AP20599/1
Gallery Court Hankey Place London SE1 4BB UK
Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 794 0 2233
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340A SE SERVICE MANUAL
TABLE OF CONTENTS
Safety Precautions & Important Notes
Exploded Drawing
Exploded Drawing Parts List
Amplifier PCB Schematic (Tone Control)
Amplifier PCB Schematic (Power Supplies)
Amplifier PCB Schematic (Power Amplifier)
Amplifier PCB Schematic (Ipod Input Circuit)
Amplifier PCB Schematic (Input Select)
Amplifier PCB Board Layout (Top Side)
Amplifier PCB Board Layout (Bottom Side)
PCB Main Assembly BOM
Microcontroller PCB Schematic
Microcontroller PCB Board Layout (Top Side)
Microcontroller PCB Board Layout (Bottom Side)
Front Panel PCB Assembly BOM
IC Pin Layout Details
3
4
5
6
7
8
9
10
11
12
13-14
15
16
17
18
19-20
SAFETY PRECAUTIONS & IMPORTANT NOTES
3
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.
© 2006 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.
Cambridge Audio Azur 340A SE Amplifier
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Exploded Drawing
Cambridge Audio Azur 340A SE Amplifier
5
Drawing
Reference
1 PY1192 9434-015010E11 Azur 340A SE Main PCB 230V AP199543 Rev A Type
2 PY1193 9434-015010E41 Azur 340A SE Control PCBA AP151856 Rev A
3 PY1197 6534-150007E000A01 Azur 340A SE Front Panel - Silver with Silkscreen (Metal-work Only)
3 PY1196 6534-150007E000-01 Azur 340A SE Front Panel - Black with Silk screen (Metal-work Only)
4 PY1194 8534-015030E301 Azur 340A SE Front Panel Assy (Silver) Rev A
4 PY1195 8534-015040E301 Azur 340A SE Front Panel Assy (Black) Rev A
5 PY1012 Remote Control (340/540/640A)
6 PY810 6550-010207-000-02 Azur-640C Small Side Panel (Silver)
6 PY1115 6550-010207-000-01 Azur 640C Small Side Panel (Black)
7 PY1111 8554-001020-701 Small Support Rear Assy (with two brass inserts)
8 PY1112 8554-001010-701 Small Support Front Assy (with two brass inserts)
9 PY642 3200-069331E000 Transformer (T06933A rev 06) 230V 24V*2/3A 17*2/150ma 340A (Europe version)
9 PY1084 3200-071211-000 TR. (T0712A REV03) 115VAC 24.7V*2@3A 17V*2@0.15A 340A (USA version)
10 PY541 6050-150010-000A01 Foot (Silver)
10 PY531 6050-150010-000 Foot (Black)
11 PY592 6050-150004-002-02 Azur-640A Grey Colour Selector Knob (Silver)
11 PY593 540A/640A Selector Knob (Black)
12 PY590 540A/640A Volume Knob (Silver)
12 PY591 540A/640A Volume Knob (Black)
AP Part
Number
PY640 Top Panel (Silver)
PY641 Top Panel (Black)
PY516 7002-608010-006 Lid T6 Torx Screws (Silver)
PY515 7002-608010-001 Lid T6 Torx Screws (Black)
PY945 6040-150002-000-01 Battery Door for Azur R/C Black Painted (USD)
PY544 6600-170100-000 Foot Pad (Self Adhesive)
Factory Part No Description
*Please order using AP part number.
Exploded Drawing Parts List
Cambridge Audio Azur 340A SE Amplifier
To enhance viewing, please print A3 6
R SEL OUT
L SEL OUT
TREBLE
R3
4k7
R11
8k2
BASS
TREBLE
R43
4k7
R45
8k2
VR3:B
B20K LINEAR
BASS
VR2:A
B20K LINEAR
VR3:A
B20K LINEAR
VR2:B
B20K LINEAR
C11
150n poly
C6
150n poly
5
C10
330p poly
R20
22k
5
2
C1
330p poly
C19
13
R2
4k7
C9
47U 16V EL
R52
150k
SW1:B
SW-DPDT
DEFEAT
VR1:A
R1
22k
2
13
R4
8k2
+15V
3
2
10p
C17
47n poly
84
U2:A
1
NE5532
C20
47U 16V EL
R59
150k
20K MOTORISED DUAL POT
2
1 3
C16
47n poly
-15V
TONE CONTROL VOLUME/BALANCE CONTROL
C29
46
R42
4k7
47U 16V EL
R54
150k
C15
R44
8k2
46
10p
U2:B
5
6
7
NE5532
C32
47U 16V EL
R60
150k
SW1:A
SW-DPDT
DEFEAT
VR1:B
5
4 6
20K MOTORISED DUAL POT
VR4:B
5
4 6
MN20K BALANCE
ZERO LOSS
WHEN CENTRAL
VR4:A
13
2
MN20K BALANCE
POWER AMP RIGHT
POWER AMP LEFT
AP19951/3 Amplifier PCB Schematic (Tone Control)
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