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Gallery Court Hankey Place London SE1 4BB UK Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233
340A Issue Date: 18th 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) 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
AP15844/1
1
340A SERVICE MANUAL
TABLE OF CONTENTS
Safety Precautions & Important Notes 3
Main Assembly BOM 4/5
Micro controller PCB Schematic (PIC’s/Switches/LED’s) 6
Micro controller PCB Layout (Top Side) 7
Micro controller PCB Layout (Bottom Side) 8
Front Panel PCB Assembly BOM 9
Main PCB Schematic (Input Select) 10
Main PCB Schematic (Power Amplifiers) 11
Main PCB Schematic (Power Supplies) 12 Main PCB Schematic (Tone Control) 13 Main PCB Layout (Top Side) 14 Main PCB Layout (Bottom Side) 15 Main PCB BOM 16-18 IC Pin Layout Details 19/20 Silver – Black Differences BOM 21
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
AP14861/4AP PART
No.DRAWING NO DESCRIPTION QTY COMMENTS
Chassis AssemblyAP14160/1 Bottom Panel 1
PY541 AP12652/2 Foot Moulding Silver 4 Position In Place on Bottom PanelPY544 AP12883/3 Foot Pad 4 Affix on Foot Using Adhesive Surface
M3 X 8 Plastite Pozi Pan 4 Fix Feet To Bottom Panel.7mm Plastic Support 9 Push Snap Fit On Bottom Panel7mm Plastic Support 4 Resting Under PCB fastened to Bottom Panel
AP14775/1 7mm Plastic Standoff ( Square Snap - In) 6 Fastening PCB to Bottom PanelM3 X 8 Plastite Pozi Pan 6 To hold PCB to Square snap-in Stand-offs
AP14561/3 Transformer toroidal 230V 1Transformer bolt M8 56mm thread length 1 Supplied with Transformer. Secures transformerDished transformer plate 70 mm diam 1 Supplied with Transformer. On top of transformerRubber Washer 2 Supplied with Transformer. One is fitted under the
transformer and one on the top, under dished washerM8 nut 1 Supplied with Transformer. Secures transformerM8 plain washer 1 Supplied with Transformer. Secures transformerM8 locking washer 1 Supplied with Transformer. Secures transformer
AP15528/1 Cambridge Toroidal 67mm label 1 Stick to top of dished transformer plate 70 mm diam.AP14862/2 Insulation Sheet 1 To Be Positioned Over Standoffs Under Power PCB
M4 X 12 Pozi Pan Machine Bolt 1 Fix Through Earthing Point hole on Bottom PanelM4 Nut Standard 1 Used To Fix Above BoltsM4 Lock Washer 1 For Earth BoltsEarth point label 1 Place next to earth point bolt on bottom of chassis
PCB Gerber AP14Main PCB Assembly BOM 1 Fixes onto the Bottom Panel With 7mm Plastic Standoffs. Built to BOM AP15173/2
Front Panel AssemblyAP14159/1 Sub Panel 1 Fasten in place between the Ledges of the Front Panel, Align
Up The Power Button HolesAP12931/1 Lightguide 3 Fasten To Subplate. Input select LEDsAP12931/1 Lightguide (half of) 0.5 Fasten To Subplate. Power LED
M3 X 6 Pozi Pan Stp Screw 4 Affixes Three Lightguide To SubplatePY638 AP14157/1 Front Panel (Punched And Printed) Silver 1 Extrusion Details AP12738* & Screened With Artwork
AP14826/1 & AP14828/2AP12935/1 IR Lens 1 Glued In Place On The Front Panel
M3 X 6 C/S Pozi Machine Screw 7 Fasten The Sub Plate to the Front Panel. Only 7 screws are fitted out of a possible 8. See drawing AP15536/1
PCB Gerber AP14IR PCB Assembly (part of F/P PCB assembly) 1 Fitted onto the Front Panel, bom is AP15185/2
Washer Nylon M3, 1mm Thk 1 Fitted between Front Panel and IR PCBM2.6 x 4mm Pan hd Poz Taptite 1 Use to fix IR PCB onto SubPanel
AP12934/1 7mm TAC Switch Cushion 6 Position on the 7mm tact switch Buttons, down the main shaft affix using adhesive provided on the cushion.
AP12925/1 7mm TAC Switch Button 6 Position In Place On The Front PanelAP12926/2 7mm Push Switch Button 2 Fitted to SW1 & 2 on main PCBPCB Gerber AP14Front Panel & MicroController PCB Assembly
BOM1 Fixes onto the Sub Panel With M3 M/C Screws. Built to BOM
AP 15185/2M3 X 6 Pozi Pan Machine Screw 7 Used For Fixing The Front Panel Pcb's To The Subplate
Standoff'sSide Panel Assembly
AP12725/2 Pressed Side Panel (2 Ridge) 2AP12727/1 Front Plastic Support (2 Ridge With Captive
M2.6 Nuts)2 Position at Front within Side Panels
AP12728/1 Rear Plastic Support (2 Ridge With Captive M2.6 Nuts)
2 Position at Rear within Side Panels
M2.6 X 8 C/S Pozi Plastite 8 To Affix Side Panels To Plastic InsertsRear Panel Assembly
AP14162/2 Rear Panel Printed 1 Screened With Artwork AP14830/3M3 X 10 Pozi Pan Plastite 8 To fix speaker terminal and Phono sockets connectors to
Rear PanelM4 X 8 Pozi Pan Plastite 2 To fix IEC Power connector to Rear Panel
Cambridge Azur 340A Main Assembly BOM
4
AP PART No.
DRAWING NO DESCRIPTION QTY COMMENTS
Final assemblyAP11879/3 Opus Control Box Powerswitch 1 Position in Place on the Front PanelAP14819/1 Push Switch Bar Extension 1 Affix and glue to Power BarCD4P AB05a Power Bar 1 Fitted to SW3 on main PCBAP15512/1 Front Panel Insulation Sheet 1 Attach to main PCB with two tie-wraps
Tie-wraps (plastic ties) Width 2.5mm 2 Attach insulation strip to main PCBPY592 AP10209/3 Cambridge Selector Knob Mk3 Silver 3
AP10224/1 Cambridge Knob Insert Mk2 3 Insert Into Selector KnobsPY590 AP12750/2 Cambridge New Range Amp Volume Knob Silver 1
AP13361/1 A600 Volume Knob Blue Plastic Insert 1 Insert Into Volume KnobAP13360/1 A600 Volume Knob Aluminium Skin 1 Glued and taped In Place On Volume Knob
M3 X 10 Pozi Pan Plastite 4 To fix rear panel to side panelsM2.6 X 6 Pozi Pan Machine Screw 12 To fix Bottom Panel To Side, Front And Rear PanelsM2.6 x ??? 4 To fix Bottom Panel To Side Panels (at corners)
AP14865/1 Cambridge Azur 340A Microcontroller Cableform
1 From Main PCB J2 to Front Panel PCB CN2
AP14896/1 Cambridge Azur 340A Volume Control Cableform
1 From Front Panel PCB CN5 to Volume Pot Motor
AP15204/1 Cambridge Azur 340A Earth Lead 1 From earth pin of IEC Scoket (CN3) on main PCB to Chassis earth stud
M4 Nut Standard 1 Used To Fix earth lead to earth studM4 Lock Washer 1 For above nutLED wireform is attached to main PCB Glue power LED into light-guideLidding
AP13340/1 Lidding Tape For Front And Rear Panels 2 Fix To The Correct Surfaces For Lid AP13342/1 Lidding Tape For Side Panels 2 Fix To The Correct Surfaces For Lid
PY640 AP14161/1 340A Top Panel (Silver) 1 Position Top Of The ProductPY516 M2.6 X 6 C/S Torx Machine Screw (Silver) 8 To Affix Top Panel to plastic Inserts, Side, Rear and Front
PanelPackagingSerial Number Label, Blank (6.5X35.5mm) 1 print with serial number label and attached to rear panel
AP13612/1 Azur 2 Ridge Woven Bag 1 Pack 340A Unit InsideAP13504/2 Poly Endcap Packaging 2AP13613/1 Azur Woven Bag For Remote Control 1 Pack Remote Control Inside,
Azur Remote Control Complete. Model No RC-340AC/540AC/640AC
1 Fit into Poly Endcap, buttons to face polystyrene, Packing in Rebate Provided
AAA Alkaline Batteries 3 For Remote. Place In Instruction Manual PolybagPY637 AP15509/1 340A Amp Instruction Manual 1
Polybag 173X260X4C mm 1 For Instruction Manual and Remote Batteries1830mm AC IEC Power Cord Set BS Standard Fused 3 AMP
1 Must Be Bs Approved
AP13505/1 Carton Packaging With Handle 1 Printed To Artwork AP13716/1AP14696/1 Carton Label (Model No.) 1 For Box
Blue Tape Seal For Cambridge Carton 1
NOTES: Issue 1 - 15.03.2004
Issue 2 - 23.04.2004
5
Cambridge Azur 340A Intergrated Amplifier
AP14518/1 Microcontroller PCB Schematic (PIC's/Switches/LED's)
RC617
RC516
RC415
RC314
RC213
RC112
RC011
OSC210
RA02
RA24
MCLR/Vpp1
RA13
RA35
RB122
RB728
RA46
RA57
Vss28
OSC19
RB223
RB324
RB627
RB425
RB526
Vss19
RC718
Vdd20
RB021
U1
PIC16F72
CRS1
FREQ=4MHz
12
CN5
H2 2.54mm 90
C6100n
FIN1
GND12
RIN3
NC4
GND25
VCC6
OUT27
COM8
OUT19
U2
BA6218
+5V
DGND
DGND
DGND
+5V
DGND
C5100n
R4220R
+5V
D1CHANNEL LED
D2CHANNEL LED
D3CHANNEL LED
D4CHANNEL LED
D5CHANNEL LED
D6CHANNEL LED
SW2
CD
SW3
TUNER/DAB
SW5
AV/MD
SW1
AUX/PHONO
SW6
TAPE MON
SW4
DVD
+5V3
OPT1
GND2
U3
TSOP18 IR RECEI
C1100n
strobe
dataclockclock
datastrobe
vol up
vol down
vol upvol down
C347u 16V
R3220R
C4100n
12345678
CN2
H8 2.54mm 90
DGND
+5V
IR RECEIVER
AUX/PHONO CD TUNER/DAB TAPE MONDVD AV/MD
123
CN3
CONN-H3
123
CN4
CONN-H3
MOTOR CONTROL
CONN TO MAIN PCB
MUTE
+5V
DGND
PORT B HAS WEAK PULLUPS 250uA typ
IN-CIRCUIT PROGRAMMING CONNECTOR
R1100K
+5V
DGND
+5VGND
Vpp
CLK
123456
CN1
ICP
GND
Data I/O
DGND
MUTE
TO MOTOR
VOLUME POT
+5V +5V
OUTPUT RELAY
IR IN
DC OFFSET
OUTPUT RELAY
R247R
HI = NORMAL
C2
10U 16V SM EL
TSOP1835/37
6 mA
86-756-8687998
To enhance viewing, please print to A3 6
Cambridge Azur 340A Intergrated Amplifier
AP14518/1 Microcontroller PCB Board Layout (Top Side)
86-756-8687998
To enhance viewing, please print to A3 7
Cambridge Azur 340A Intergrated Amplifier
AP14518/1 Micrcontroller PCB Board Layout (Bottom Side)
86-756-8687998
To enhance viewing, please print to A3 8
AP15185/3AP PART
No.DRAWING No DESCRIPTION QTY DESIGNATOR COMMENTS
47R Resistor 0.25W 1% metal film 1 R2220R Resistor 0.25W 1% metal film 2 R3, R4100K Resistor 0.25W 1% metal film 1 R1100nF Ceramic NP0 or C0G 10% 4 C1, C4-C647uF 16V Radial Electrolytic 1 C3
PY634 PIC16F72-I/SP 1 U1 Programmed with AP14904/X
Version label for PIC 1 U1Print with latest software version number and stick on PIC.
PY260 BA6218 MOTOR DRIVE IC1 U2
As used in 540A. 4162-180002-300 SIL-8 package
PD092 TSOP18 IR RECEIVER MODULE (VISHAY) 1 U3 As used in 540A 3001-183600-001PY064 FLAT TOP BLUE LEDS (AS PER CURRENT
CAMBRIDGE)6 D1-D6
Please use flat top LED at standard Azur height
ICP Picoplex PF-50 6-way male header 1 CN1 VerticalH8 2.54mm 90 1 CN2 Right-angle connector 8-wayH2 2.54mm 90 1 CN5 Right-angle connector 2-wayH3 2.54mm 90 1 CN3 Right-angle connector 3-way
AP14897/1 Azur 340A IR PCB cable 1
2400-020200-000 Tactile Switch 6 SW1, 2, 3, 4, 5, 6As used on 540A, CD, Tuner, AV, Phono/Aux, Tape/Mon, DVD
Ceramic Resonator F=4MHz 1 CRS110mm long Wire link 11 LK1-11 AP14519/1 Blank PCB 1
Note:AP14518/1-B is the IR PCB assembly
Cambridge Azur 340A Front Panel PCB BOM
AP14518/1-A is the switch and micro controller PCB assembly
9
Cambridge Azur 340A Intergrated Amplifier
AP14476/3 Main PCB Schematic (Input Select)
21
CN
4:A
QU
AD
PH
ON
O
3C
N4:
BQ
UA
D P
HO
NO
54
CN
4:C
QU
AD
PH
ON
O
6C
N4:
DQ
UA
D P
HO
NO
21
CN
5:A
QU
AD
PH
ON
O
3C
N5:
BQ
UA
D P
HO
NO
54
CN
5:C
QU
AD
PH
ON
O
6C
N5:
DQ
UA
D P
HO
NO
21
CN
8:A
QU
AD
PH
ON
O
3C
N8:
BQ
UA
D P
HO
NO
54
CN
8:C
QU
AD
PH
ON
O
6C
N8:
DQ
UA
D P
HO
NO
3
21
84
U1:A
NE5532
5
67
U1:B
NE5532
-15V
+15V
-15V +15V
R5220K
R6220K
R7100R
R10
100R
R14
100R
R15220K
R16220K
R17
100R
R18
1K
R19
100R
R21220K
R22220K
R23220K
R24
100R
R25
100R
R26
100R
R27
100R
R28
100R
R29
1K
R30220K
R31220K
C4
47n poly
C5
47n poly C7
47n poly
C8
47n poly
C12
22p
C13
22p
R32220K
R33
10k
R34
10k
R35
10k
R36
10k
R37100K
R38100K
R39100K
R40100K
R41
100R
R46
100R
R47
100R
C26
100nF 100V
L CH IN
R CH IN
R50220K
R51220K
21
CN9:ADUAL PHONO3
CN9:BDUAL PHONO
LEFT RIGHT
TA
PE R
ETU
RN
RIG
HT
TA
PE R
ETU
RN
LEF
T
12345678
J2
H8 2.54mm 90
+5V
INPUT/TAPE SELECT SWITCH
MUTE
MICROCONTROLLERBOARD CONNECTOR
OUTPUT RELAYDC OFFSET
DATACLOCK
STROBE
2 3 5 6
A B C D
LR LR
TA
PE O
UT
R
AU
X R
CD
TU
NER
/DA
B
DV
D
AV
/MDAU
X L
CD
TA
PE O
UT
L
TU
NER
/DA
B
DV
D
AV
/MD
B T B T
Vss1
L-S12
L-S23
L-S34
L-COM15
L-S46
L-S57
L-S68
L-COM29
L-S710
L-S811
L-COM312
ST13
GND14
Vdd28
R-S127
R-S226
R-S325
R-COM124
R-S423
R-S522
R-S621
R-COM220
R-S719
R-S818
R-COM317
DATA16
CLK15
U4
TC9163
INPUT BUFFER
+ 6 dB
MAINS GND
C14
10U 16V
C25
10U 16V
86-756-8687998
To enhance viewing, please print to A3 10
Cambridge Azur 340A Intergrated Amplifier
AP14476/3 Main PCB Schematic (Power Amplifiers)
R81K
+10
-9
OUT3
V-
4
GND
7
MUTE
8
V+
1
V+2
5
NC2
6
NC
2
NC3
11 U6
LM3886
C2100nF 100V
L1
+28V
-28V
R927K
R48
RES2W 2R2
R56RES2W 10R
R57 27K
R5822K
C3
10U 16V
C2247U 16V
C23100U 16V NO FIT
POWER AMPLIFIER LEFT
R651K
+10
-9
OUT3
V-
4
GND
7
MUTE
8
V+
1
V+2
5
NC2
6
NC
2
NC3
11 U7
LM3886
C36100nF 100V
L2
+28V
-28V R6627K
R67
RES2W 2R2
R68RES2W 10R
R69 27K
R7022K
C37
10U 16V
C3847U 16V
C39100U 16V NO FIT
POWER AMPLIFIER RIGHT
POWER AMP LEFT
POWER AMP RIGHT
C40100U 50V HR
C41100U 50V HR
C42100U 50V HR
C43
100U 50V HR
MUTE
R7147K
Q1BC327
+5V
R7247K
R7347K
R7447K
Q2BC337
AMP MUTE
AMP MUTE
-28V
HI = MUTE
SW2:ASW-DPDT
SW2:B
SW-DPDT
SPEAKER B ON/OFF
RSW1
RSW2
R
L
GND
LSW1
LSW2
2
4
3
1
7
8
5
CN1
HEADPHONE JACK
R61
220R 3W C
R62470R 1W C
R63
220R 3W C
R64470R 1W C
12
CN2:ASPKR 4-WAY
43
CN2:B
SPKR 4-WAY
56
CN2:CSPKR 4-WAY
87
CN2:D
SPKR 4-WAY
LEFT: SPEAKER A
LEFT: SPEAKER B
RIGHT
RIGHT
34
5
RL1:B
12V 8A RELAY
67
8
RL1:C
12V 8A RELAY
1
2
RL1:A
12V 8A RELAY
360RQ3BC337
D91N4001
R75220R1/2 W
+20V
R76
4K7
OUTPUT RELAY
R77
47K
R78
47K
SPEAKER A
SPEAKER B
Q4BC327
Q5BC337
D10
1N4148
D11
1N4148
R791K8
R803K3
D12
1N4148
D13
1N4148
D141N4148
D151N4148
-15V
+15V
DC OFFSET
R123K9
R132K2 D16
5V1
HI = NORMAL
C5422U 50V NP
C5522U 50V NP
DC OFFSET DETECT
40W 8 Ohms= 17.9 Vrms
R53 270K
R55 270K
R81
470R
R82
470R
TIP = LEFTRING = RIGHT
86-756-8687998
To enhance viewing, please print to A3 11
Cambridge Azur 340A Intergrated Amplifier
AP14476/3 Main PCB Schematic (Power Supplies)
earth
C246800uF-50V
C276800uF-50V
+28V
-28V
D1
1N5402
D2
1N5402
D3
1N5402
D4
1N5402
F1
T6A3 ALLVD!
F2
T6A3 ALLVD!
0V
23V
23V
F3
20MM T6.3AL or 3.15AL
TO MAINS TRANSFORMER
J5
BLUE/WHITE
J6
BROWN/BLACK
L
N
E
CN3
IEC-SOC
C34X1 10n
C35X1 10n
C44X2 470N SUPPRESSION
FROM TRANSFORMER
F4
20MM T1AL
F5
20MM T1AL
12 SW3
KDC-A04-10
D5
1N4002
D6
1N4002
D7
1N4002
D8
1N4002
J7
TERMINALgreen
J9
TERMINALpurple
J10
TERMINALblue
C451000u 35V
C46470u 35V
VI1
VO3
GN
D2
U57805
C4747u 16VC48
47n poly
VI1
VO3
GN
D2
U87815
VI2
VO3
GN
D1
U97915
C49100u 25V
C50100u 25V
+5V
C5147n poly
C5247n poly
C5347n poly
+15V
-15V
FROM TRANSFORMER
+20V
J3
TERMINAL
J4
TERMINAL
J8
TERMINAL
MAINS SWITCH PCB
OPAMP SUPPLY
MICROCONTROLLER SUPPLY
POWER AMP SUPPLY
C28X2 470N SUPPRESSION
ALTERNATIVE POSITIONS FORX-CAPS WITH DIFFERENT LEAD PITCHES
MAINS GND
To sheet 1
R491K8
P1PAD
P2PAD
POWER LED
86-756-8687998
To enhance viewing, please print to A3 12
Cambridge Azur 340A Intergrated Amplifier
AP14476/3 Main PCB Schematic (Tone Control)
C1330p poly
R122k
R24k7
R34k7
R48k2
R118k2
C6150n poly
C9
10p
SW1:A
SW-DPDTDEFEAT
-15V
+15V
C10330p poly
R2022k
R424k7
R434k7
R448k2
R458k2
C11150n poly
C15
10p
SW1:B
SW-DPDTDEFEAT
C16
47n poly
C17
47n poly
3
21
84
U2:A
NE5532
5
67
U2:B
NE5532
R CH IN
L CH IN
POWER AMP RIGHT
POWER AMP LEFT
R52150k
R54150k
R59150k
R60150k
13
2
VR1:A20K MOTORISED DUAL POT
46
5
VR1:B
20K MOTORISED DUAL POT
46
5
VR4:B
MN20K BALANCE
13
2
VR4:A
MN20K BALANCE
13
2
VR2:AB20K LINEAR
46
5
VR2:BB20K LINEAR
13
2
VR3:AB20K LINEAR
46
5VR3:BB20K LINEAR
ZERO LOSSWHEN CENTRAL
TONE CONTROL VOLUME/BALANCE CONTROL
TREBLE
BASS
TREBLE
BASS
C19
47u 16V
C20
47u 16V
C29
47u 16V
C32
47u 16V
86-756-8687998
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Cambridge Azur 340A Intergrated Amplifier
AP14476/4 Main PCB Board Layout (Top Side)
86-756-8687998
To enhance viewing, please print to A3 14
Cambridge Azur 340A Intergrated Amplifier
AP14476/4 Main PCB Board Layout (Bottom Side)
86-756-8687998
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AP151734AP PART
No.DRAWING NO DESCRIPTION QTY DESIGNATOR NOTES
2R2 2W Metal Film 2 R48, R67 Stand off PCB by 5mm10R 2W Metal Film 2 R56, R68 Stand off PCB by 5mm100R 0.25 W 1% Metal Film 13 R7, R10, R14, R17, R19,
R24-R28, R41, R46, R47220R 0.5 W Metal Film 1 R75220R 3W Metal Film 2 R61, R63 Stand off PCB by 5mm470R 0.25 W 1% Metal Film 2 R81, R82470R 1W Metal Film 2 R62, R64 Stand off PCB by 5mm1K 0.25 W 1% Metal Film 4 R8, R18, R29, R651K8 0.25 W 1% Metal Film 2 R49, R792K2 0.25 W 1% Metal Film 1 R133K3 0.25 W 1% Metal Film 1 R803K9 0.25 W 1% Metal Film 1 R124k7 0.25 W 1% Metal Film 5 R2, R3, R42, R43, R768k2 0.25 W 1% Metal Film 4 R4, R11, R44, R4510k 0.25 W 1% Metal Film 4 R33-R3622k 0.25 W 1% Metal Film 4 R1, R20, R58, R7027K 0.25 W 1% Metal Film 4 R9, R57, R66, R6947K 0.25 W 1% Metal Film 6 R71-R74, R77, R78100K 0.25 W 1% Metal Film 4 R37-R40150k 0.25 W 1% Metal Film 4 R52, R54, R59, R60220K 0.25 W 1% Metal Film 12 R5, R6, R15, R16, R21-R23,
R30-R32, R50, R51270K 0.25 W 1% Metal Film 2 R53, R5522pF Ceramic NPO. Pitch= 3.0mm 2 C12, C1310pF Ceramic NPO. Pitch= 3.0mm 2 C9, C15330pF Polyester. Pitch= 5.0mm 2 C1, C1010nF X1 Mains rated Ceramic. Pitch=
5.0mm2 C34, C35 EMC Suppression
47nF Polyester Pitch= 5.0mm 10 C4, C5, C7, C8, C16, C17, C48, C51-C53
100nF Ceramic 100V Pitch= 5.0mm 3 C2, C26, C36150nF Polyester Pitch= 5.0mm 2 C6, C11470nF X2 Mains rated Polypropylene.
Pitch 22.5mm1 C28 EMC. C44 is alternative fit for 27.5 mm
pitch10uF Electrolytic 16V Pitch= 2.0mm 4 C3, C14, C25, C3722uF Electrolytic 50V NP Pitch= 2.0mm 2 C54, C55
47uF Electrolytic 16V Pitch= 2.5mm 6 C19, C20, C22, C29, C32, C38, C47
100uF Electrolytic 50V HR Pitch= 5.0mm 4 C40-C43
100uF Electrolytic 25V Pitch= 2.5mm 2 C49, C50470uF Electrolytic 35V Pitch= 5.0mm 1 C461000uF Electrolytic 35V Pitch= 5.0mm 1 C456800uF Cambridge Audio Branded
Electrolytic 50V Pitch= 10.0mm2 C24, C27 Glue both capacitors to PCB
PY259 NE5532 Dual Low Noise Operational Amplifier
2 U1,U2 DIL package
PY476 TC9163AF Input Switching 1 U4 surface mount package7805T Voltage Regulator +5V 1 U5 TO220 package
PY644 LM3886T High Performance Audio Power Amplifier
2 U6,U7
7815T Voltage Regulator +15V 1 U8 TO220 package7915T Voltage Regulator -15V 1 U9 TO220 package
PY219 BC327 PNP Small Signal 2 Q1, Q4PY214 BC337 NPN Small Signal 3 Q2, Q3, Q5
Cambridge Azur 340A Main PCB BOM
16
AP PART No.
DRAWING NO DESCRIPTION QTY DESIGNATOR NOTES
1N5402 General Purpose Rectifier 4 D1-D41N4002 General Purpose Rectifier 4 D5-D81N4001 General Purpose Rectifier 1 D91N4148 High Speed Signal 6 D10-D15BZX85-C5V1 Zener 400mW 1 D16
PY649 T6.3AL 6.3A time delay Fuse-20mm low breaking capacity
2 F1, F2 Secondary fuses
PY595 T3.15AL 3.15A time delay Fuse-20mm low breaking capacity
1 F3 230V mains fuse
PY647 T1AL 1A time delay Fuse-20mm low breaking capacity
2 F4, F5 Secondary fuses
4031-050100-001 Fuseholder 20mm 5 F1, 2, 3, 4, 54034-000030-000 Fuseholder cover 1 F3 Place on mains fuse holder F3H8 2.54mm CONN-SIL8 1 J2 Vertical connectorBLUE/WHITE eyelet 1 J5 Terminate txfmr mains leadBROWN/BLACK eyelet 1 J6 Terminate txfmr mains lead25X7MM INDUCTOR
3203-874801-000 2 L1, L2 As 540A amplifier
PY594 12V coil, 8A 250VACMassuse Me-11 012-2Z4
Relay-s 1 RL1
PY004 20K MOTORISED DUAL POT
Pot-Dual-Motor 1 VR1 As 540A amplifier. IMPORTANT leads must be cropped close to PCB
PY003 B20K LINEAR Pot-Dual 2 VR2, VR3 As 540A amplifier. IMPORTANT leads must be cropped close to PCB
PY005 MN20K BALANCE Pot-Dual 1 VR4 As 540A amplifier. IMPORTANT leads must be cropped close to PCB
M3 x 10 Taptite Power Amp IC Fix Screw 2 Fix IC tab to heatsinkM3 Power Amp IC Insulating Bush 2 Insulate fix screw from IC tabPrecut washer type K177-NA-617
Power Amp IC Insulating Washer 2 K177 is the material type. NA means "no adhesive". Self-adhesive version would be technically acceptable.
Dwg no: AP14899/1 Power Amp Heatsinks 2 Black anodised6510-150310-000 (Pressure board)
Power Amp IC Bracket 2 Holds IC body against heatsink
M3 x 6 Taptite Power Amp IC Bracket Fix Screws 4 Fix bracket to heatsink
Screw M3.5x10mm BTB thread, Binding Head, cross recess, black plated
Heatsink Fixing Screws 4 7003-510003-111
Metal Washer OD=10mm ID=3.5mm Thk=0.8mm
Heatsink Fixing Washers 4 7103-610008-022
M4 x 12 machine screw
IEC socket fix screws 2 Fix IEC socket to PCB
M4 locking washer IEC socket fixing 2 Fix IEC socket to PCBM4 nut IEC socket fixing 2 Fix IEC socket to PCBAP15508/1 Power LED wireform 1 Solder to pads P1, P210mm long Wire link 37 LK11-22, LK29-37, LK39-
5625mm long Wire link 19 LK 1-10, LK 23-28, LK36-
38PY646 2330-005901-300 Headphone Jack 1 CN1 As 540A amplifierPY647 WP8-21A Spkr 4-Way 1 CN2 Note: red terminals at top. Modified
mechanically as per our instructions.PY226 2336-003910-002 IEC-Socket 1 CN3 As 540A amplifierPY036 2330-006911-021 Quad Phono 3 CN4, CN5, CN8 As 540A amplifier, Zuanbao AV4-8.4-9
PY035 AV2-8.4-9 Dual Phono 1 CN9
17
AP PART No.
DRAWING NO DESCRIPTION QTY DESIGNATOR NOTES
PY645 2402-020200-010 SW-DPDT 2 SW1, SW2 As 540A amplifierPY227 KDC-A04-10 Mains switch 10A 250V TV-8 1 SW3 mains switch
Gerber AP14477/4 1 Schematic AP14476/4Gerber file is AP14477/4PCB Construction details AP14478/4
Please mark board POP REV A
NOTES:
Note 4: All capacitors 85 degC rating or above
Note 1: C23, C39 Components not fittedNote 2: All resistors larger than 0.25W to be stood off the board by 5mmNote 3: All resistors 1% tolerance
18
Cambridge Audio Azur 340A Amplifier IC Pin Layout Details
Front Panel PCB PIC16F72-I/SP (U1)
BA6218 (U2)
TSOP1836/37 (U3)
19
Main PCB NE5532 (U1 & U2)
TC9163AF (U4)
LM3886T (U6 & U7)
20
AP158421
AP PART No.
DRAWING NO
DESCRIPTION QTY COMMENTS
CARTON LABEL (MODEL NO.) UK BLACK 1 FOR BOXPY593 CAMBRIDGE SELECTOR KNOB MK3 Black 3PY591 CAMBRIDGE NEW RANGE AMP VOLUME KNOB Black 1
PY639CAMBRIDGE FRONT PANEL (PUNCHED AND PRINTED) Black 1 SCREENED WITH ARTWORK AP13679/2
CAMBRIDGE NEW RANGE AMP 7mm TAC SWITCH BUTTON 6 POSITION IN PLACE ON THE FRONT PANELCAMBRIDGE NEW RANGE AMP 7mm PUSH SWITCH BUTTON 2 POSITION IN PLACE ON THE FRONT PANEL
PY531 CAMBRIDGE NEW RANGE FOOT MOULDING 4 POSITION IN PLACE ON BOTTOM PANELPY641 340A Top Panel (Black) 1 POSITION ON TOP OF THE PRODUCTPY515 M2.6 x 8 MC Torx Recessed Black 8 TOP PANEL SCREWS
Cambridge Azur 340A Silver - Black Diffrences BOM
21