Cambridge Audio Integrated Amplifier Azur 740A Service Manual Download

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PGD

PGC

The Audio Partnership

Gallery Court
Hankey Place
LONDON SE1 4BB

Tel : +44 (020) 7 940 2200
Fax : +44 (020) 7 940 2233

DRAWN BY

CHECKED BY

DATE

DRAWING TITLE

DRAWING No.

PAGE

SHEET TITLE

GENERAL NOTES

PRS

13/11/09

740A Front Panel PCB

MICROCONTROLLER & LCD SHEET1

AP19784/4

2/2

1.
2.
3.
4.
5.

MCLR/VPP

RA0/AN0

RA1/AN1

RA2/AN2/Vref-/CVref

RA3/AN3/VREF+

RA4/T0CKI/C1OUT

RA5/AN4/SS/C2OUT

RE0/RD/AN5

RE1/WR/AN6

RB4

RB3/PGM

RB2

RB0/INT

VDD

VSS

RD7/PSP7

RD6/PSP6

RB1

RD5/PSP5

RD4/PSP4

RC7/RX/DT

RC5/SDO

RC4/SDI/SDA

RD3/PSP3

RD2/PSP2

RC6/TX/CK

VDD

VSS

OSC1/CLKIN

OSC2/CLKOUT

RCO/T1OSO/T1CKI

RC1/T1OSI/CCP2

RC2/CCP1

RC3/SCK/SCL

RD0/PSP0

RE2/CS/AN7

RD1/PSP1

RB5

RB6/PGC

RB7/PGD

PIC16F877A-I/P
PROGRAMMED_WITH=AP20357/x

SW1

KPT-1105A

SW2

KPT-1105A

SW3

KPT-1105A

SW4

KPT-1105A

SW7

KPT-1105A

SW8

KPT-1105A

SW9

KPT-1105A

INPUT 1

INPUT 2

INPUT 3

INPUT 4

INPUT 5

TAPE MON

MODE

+5V

LCD DISPLAY CONN

100nF 50V
Mono Ceramic

SERIAL DATA

SERIAL CLOCK

INPUT STROBE

VI/SHORT

CLIP DETECT

MAINS FAIL

DC OFFSET

PHONES DETECT

100nF 50V
Mono Ceramic

ON/STBY

ROW 3

ROW 2

COL 1

COL 2

COL 3

Strip Cut Crystal
4MHz

22pF 50V
NP0 Ceramic

Vss 1

Vdd 2

Vo 3

RS 4

R/W 5

E 6

D0     7
D1     8
D2     9
D3   10
D4   11
D5   12
D6   13
D7   14

LED A 15
LED K 16

C GND

A SW

B SW

FIX2

FIX1

ROT1

Noble
Rotary Encoder

10uF 16V
Electrolytic

100nF 50V
Mono Ceramic

PREAMP RELAY

VOLUME STROBE

+5V

OVER TEMP

CLK

STB

VCC

GND

M74HC4094B1R

OVER TEMP

VI/SHORT

DC OFFSET

LCD DECOUPLE

1
2
3
4
5
6

1a
2a
3a
4a
5a
6a

7
8

7a
8a

CN1

2x8 Way
DIL Bottom Entry Header

LCD CONN ORIENTATION FROM FRONT

CLIP DETECT

ON/OFF

BRIGHT

CONT

ROL BUS IR

+5V

SERIAL CLOCK

SERIAL DATA

INPUT STROBE

ABUS IR

POWER AMP RELAY

LCD STR.

SW6

KPT-1105A

SW5

KPT-1105A

C11

10nF 50V
Ceramic

C12

10nF 50V
Ceramic

C13

10nF 50V
Ceramic

C14

10nF 50V
Ceramic

C15

10nF 50V
Ceramic

VOLUME STROBE

SPEAKER

ABUS IR

+5V

SPEAKER A RELAY

RC5 BLOCK

RC5 TX

C16

100nF 50V
Mono Ceramic

+5V

C17

10uF 16V
Electrolytic

PHONES DETECT

CONTROL BUS IR

PREAMP RELAY

SPEAKER A RELAY

SPEAKER B RELAY

TO POWER AMP PCB

TO PRE AMP PCB

MAINS FAIL

RC5 BLOCK

RC5 TX

POWER AMP RELAY

+5V

Blue Azur LED

POWER AMP RELAY

DIRECT RELAY

SW10

KPT-1105A

DIRECT

ROW 4

+5V

R19

100R
1/4W Metal Film

1K2
1/4W Metal Film

300R
1/4W Metal Film

56R
1/4W Metal Film

10K
1/4W Metal Film

R10

10K
1/4W Metal Film

R11

10K
1/4W Metal Film

R15

220R
1/4W Metal Film

R12

220R
1/4W Metal Film

R14

47R
1/4W Metal Film

1K
1/4W Metal Film

R16

1K
1/8W Metal Film

R17

1K
1/8W Metal Film

10K
1/4W Metal Film

1
2
3
4
5
6
7
8
9

CN9

10 Way
Right Angle Header

+5V

OPT

GND

TSOP34836
36KHz

1
2
3
4
5
6

CN2

6 Way
Right Angle Header

PIC IR ON/OFF

+5V

MCLR

+5V

PIC IR ON/OFF

+5V

1
2
3
4
5
6

CN11

6 Way

+5V

47nF 50V
Ceramic

C22

47nF 50V
Ceramic

+5V

1N4148
Signal Diode

MCLR

LK2

24 AWG

LK3

24 AWG

+5V

LK4

24 AWG

LK6

24 AWG

LK7

24 AWG

+5V

LK9

24 AWG

CONTROL BUS IR

LK10

24 AWG

+5V

LK12

24 AWG

LK13

24 AWG

LK14

24 AWG

LK15

24 AWG

LK16

24 AWG

LK17

24 AWG

LK20

24 AWG

LK21

24 AWG

LK22

24 AWG

LK23

24 AWG

LK24

24 AWG

LK25

24 AWG

LK26

24 AWG

LK27

24 AWG

LK28

24 AWG

LK29

24 AWG

LK30

24 AWG

LK31

24 AWG

LK33

24 AWG

LK34

24 AWG

LK32

24 AWG

LK35

24 AWG

LK36

24 AWG

LK8

24 AWG

U4:A

VCC=+5V
M74HC02
GND=GND

U4:B

VCC=+5V
M74HC02
GND=GND

U4:C

VCC=+5V
M74HC02
GND=GND

U4:D

VCC=+5V
M74HC02
GND=GND

LK5

24 AWG

LK11

24 AWG

R36

47K
1/4W Metal Film

R39

1K
1/8W Metal Film

R28

47K
1/4W Metal Film

R34

10K
1/4W Metal Film

R35

47K
1/8W Metal Film

R27

47K
1/4W Metal Film

R29

47K
1/4W Metal Film

R30

47K
1/4W Metal Film

R31

47K
1/4W Metal Film

R32

100K
1/4W Metal Film

R33

47K
1/4W Metal Film

PGD

PGC

BC337-25
NPN Signal

1
2
3
4
5
6
7
8
9

CN3

9 Way
Right Angle Header

R13

47K
1/8W Metal Film

LCD STR

LCD STR.

LCD STR

BRIGHT
ON/OFF

+5V

LK18

24 AWG

CCW

PR1

Multiturn
500R

Rev2: Changed PR1 from 5k to 500R and changed R33&R36 from 47K to 10K

Rev4: R8 and R9 (10R) to 1k; R33 and R36 (10k) to 47k

Summary of Contents for Integrated Amplifier Azur 740A

Page 1: ...r 0 01 20 Hz 20 kHz At 80 of rated power Frequency Response 10 Hz 50 kHz 1 dB S N Ratio ref 1W 8 Ohms 96 dB Input Impedances Inputs 1 6 47 kOhm Power Amp Damping Factor 110 at 1 kHz Max Power Consumption 750W Minimum Power Consumption Active no signal 45W Standby 6W Bass Treble Controls Shelving Type Max bass boost cut 10 dB at 10 Hz Max treble boost cut 7 5 dB at 20 kHz Dimensions 115 x 430 x 350...

Page 2: ...dphone Driver 19 Preamp PCB Schematic Buffers Switches 20 Preamp PCB Board Layout Top Side 21 Preamp PCB Board Layout Bottom Side 22 Preamp PCB BOM 23 26 Amplifier Schematic Speaker PCB 27 Amplifier Schematic Right Channel 28 Amplifier Schematic Left Channel 29 Amplifier Schematic Protection 30 Amplifier Schematic Power Supply 31 Amplifier PCB Board Layout Top Side 32 Amplifier PCB Board Layout Bo...

Page 3: ..._______________________________52 Procedure to Upgrade Software___________________________________ 53 Kanda PIC Hand Held Programmer Modification Instructions____________54 58 Revised Front Panel Schematic to improve encoder reliability see Service Bulletin TNBC 0035 __________________________________ 59 60 ...

Page 4: ...s 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 chi...

Page 5: ...Cambridge Audio Azur 740A Amplifier Exploded Diagram Complete Unit 3 3 2 15 To enhance viewing please print to A3 5 ...

Page 6: ...Cambridge Audio Azur 740A Amplifier Exploded Diagram Chassis Assembley 13 10 9 8 1 16 To enhance viewing please print to A3 6 ...

Page 7: ...Cambridge Audio Azur 740A Amplifier Exploded Diagram Front Panel Assembley 7 6 4 5 To enhance viewing please print to A3 7 ...

Page 8: ...Cambridge Audio Azur 740A Amplifier Exploded Diagram Rear Panel Assembley 11 12 14 To enhance viewing please print to A3 8 ...

Page 9: ...74 150029E000A01 Azur 740A Front Panel Artwork S AP200931 metal PY1345 6574 150029E000 01 Azur 740A Front Panel Artwork B 6 PY1346 9474 015000E041 Azur 740A Control PCBA Rev A 7 PY1138 2409 010200E001 Rotary Encoder Switch REB161 9 7 PVB20FHINB1 2 24E 8 PY1347 9474 015000E091 Azur 740A Amp Power PCBA AP19797 A Rev A T Type 9 PY1348 9474 015000E001 Azur 740A Protection Circuitry PCB A Assy Rev A 10...

Page 10: ...eader SHIELD_L2 SHIELD_R2 RIGHT LEFT 1 2 3 4 5 6 CN6 6 Way Right Angle Header 1 2 3 4 5 6 CN7 6 Way Right Angle Header RA RTB RC RA RBB RC RA RTB RBB RC LA LTB LC LA LBB LC LA LTB LBB LC VR1 A 5k Push Action Linear Pot VR1 B 5k Push Action Linear Pot VR2 A 5k Push Action Linear Pot C10 680nF 63V Met Polyester VR2 B 5k Push Action Linear Pot C18 680nF 63V Met Polyester GUARD R L 1 2 3 4 5 CN8 5 Way...

Page 11: ...ABUS IR 5V SPEAKER A RELAY RC5 BLOCK RC5 TX C16 100nF 50V Mono Ceramic 5V C17 10uF 16V Electrolytic PHONES DETECT CONTROL BUS IR PREAMP RELAY SPEAKER A RELAY SPEAKER B RELAY SPEAKER B RELAY TO POWER AMP PCB TO PRE AMP PCB MAINS FAIL RC5 BLOCK RC5 TX POWER AMP RELAY 5V D1 Blue Azur LED POWER AMP RELAY DIRECT RELAY DIRECT RELAY SW10 KPT 1105A DIRECT ROW 4 5V R19 100R 1 4W Metal Film R3 1K2 1 4W Meta...

Page 12: ...Cambridge Audio Azur 740A Amplifier AP19784 3 Front Panel Board Layout Top Side To enhance viewing please print to A3 12 ...

Page 13: ...Cambridge Audio Azur 740A Amplifier AP19784 3 Front Panel Board Layout Bottom Side To enhance viewing please print to A3 13 ...

Page 14: ...ic 5 C11 C15 10 1100 103043 000 47nF 50V Ceramic 2 C3 C22 10 1100 473044 000 47nF 63V Met Polyester 4 C104 C106 C204 C206 10 1117 473053 000 100nF 50V Mono Ceramic 5 C1 C2 C4 C9 C16 10 1100 104043 000 680nF 63V Met Polyester 2 C10 C18 10 1117 684053E000 10uF 16V Electrolytic 3 C7 C8 C17 20 1102 100014 000 2x8 Way DIL Bottom Entry Header 1 CN1 2350 016300 001 Please mount on track side of PCB 6 Way...

Page 15: ... M74HC4094B 8 Bit Shift Register 1 U2 M74HC4094 B1R 4174 409052 600 PY755 36KHz IR Receiver IC 1 U3 TSOP34836 3001 348360 000 PY471 Quad 2 Input NOR Gate 1 U4 M74HC02 PY108 Dual Audio Op Amp 2 U100 U200 NE5532P 4155 320052 900 PY214 45V 300mA NPN Signal 3 Q1 Q3 BC337 25 1300 337000 100 INTEGRATED CIRCUITS TRANSISTORS Note resistors capaciotrs and other generic electronic components are not usually...

Page 16: ...10k 1 8W Metal Film 15V VI 2 VO 3 ADJ 1 U6 LM337T Adj Regulator R142 120R 1 8W Metal Film R141 620R 1 8W Metal Film R140 10k 1 8W Metal Film 15V C3 47nF 63V Met Polyester C16 100uF 25V Electrolytic C17 47nF 63V Met Polyester R16 220R 1 8W Metal Film R11 3k 1 8W Metal Film R12 1k8 1 8W Metal Film 15V VI 3 VO 2 ADJ 1 U8 LM317T Adj Regulator STAR STAR DGND R36 220R 1 8W Metal Film R35 220R 1 8W Metal...

Page 17: ... 1 8W Metal Film R74 10k 1 8W Metal Film R68 4k7 1 8W Metal Film Open Collector Output R69 100k 1 8W Metal Film DGND 5V L Speaker Test R80 1k 1 8W Metal Film For 1mA R81 10k 1 8W Metal Film R75 100R 1 8W Metal Film R73 4 7R 1 8W Metal Film 3 2 1 8 4 U13 A LM393AP Dual Comparator 5V R64 4k7 1 8W Metal Film Open Collector Output D10 Rectifier Diode 1N4004 L Speaker Test Speaker B Relay RC5 Block RC5...

Page 18: ...7nF 63V Met Polyester C33 47nF 63V Met Polyester Q10 BC337 25 NPN Signal Q12 BC327 25 PNP Signal Q11 BC327 25 PNP Signal R127 1 4W Metal Film 4k7 22 5V 240V R128 7k5 1 4W Metal Film 28V 240V Q8 BC337 25 NPN Signal R137 10k 1 8W Metal Film Main R139 10k 1 8W Metal Film Preamp Standby 5V Q9 BC327 25 PNP Signal R136 10k 1 8W Metal Film Q7 BC337 25 NPN Signal R138 10k 1 8W Metal Film Unreg R126 100k 1...

Page 19: ... 1 4W Metal Film 560R R24 1 4W Metal Film 560R R21 1 4W Metal Film 5k6 R2 1 4W Metal Film 5k6 Q3 BD139 NPN Power Q2 BD139 NPN Power Q1 BD140 PNP Power R4 1 4W Metal Film 180R R17 10R 2W Carbon R18 10R 2W Carbon RCh HP Out R32 1 4W Metal Film 100R LCh HP Out R27 1 4W Metal Film 100R C43 Electrolytic 470uF 25V C46 Electrolytic 470uF 25V R5 360R 1 4W Metal Film R10 360R 1 4W Metal Film C2 10nF 63V Po...

Page 20: ...C98 100pF 50V NP0 Ceramic R88 220R 1 8W Metal Film R89 220R 1 8W Metal Film R87 220R 1 8W Metal Film R90 220R 1 8W Metal Film 3 CN14 B AV4 8 4 9 1 2 CN14 A AV4 8 4 9 4 5 CN14 C AV4 8 4 9 1 2 CN15 A AV4 8 4 9 4 5 CN15 C AV4 8 4 9 1 2 CN16 A AV4 8 4 9 4 5 CN16 C AV4 8 4 9 1 2 CN17 A AV4 8 4 9 4 5 CN17 C AV4 8 4 9 15V C72 NP Electrolytic 47uF 16V C71 NP Electrolytic 47uF 16V C113 NP Electrolytic 47uF...

Page 21: ...Cambridge Audio Azur 740A Amplifier AP19799 4 Preamp PCB Board Layout Top Side Lar ryR To enhance viewing please print to A3 21 ...

Page 22: ...Cambridge Audio Azur 740A Amplifier AP19799 4 Preamp PCB Board Layout Bottom Side To enhance viewing please print to A3 22 ...

Page 23: ...1k 1206 Thick Film 12 R50 R51 R83 R85 R91 R93 R95 R97 R99 R101 R103 1 1k 1 8W Metal Film 2 R80 R82 1 1k 1206 Thick Film 1 R105 1 1k5 1 4W Metal Film 4 R20 R26 R28 R31 1 R76 and R77 has been replaced with wire link 1k8 1 8W Metal Film 1 R12 1 1k8 1 4W Metal Film 4 R54 R55 R58 R59 1 2k7 1 4W Metal Film 2 R23 R41 1 3k 1 8W Metal Film 1 R11 1 3k3 1 4W Metal Film 2 R22 R40 1 4k7 1 8W Metal Film 6 R29 R...

Page 24: ...C41 C44 C45 C55 C59 C62 C67 C68 C75 C76 C80 C81 C83 C84 C106 C111 10 1117 473053 000 100nF 100V Mono Ceramic 7 C6 C9 C10 C20 C36 C58 C120 10 1106 104064 001 100nF 100V Polypropylene 2 C48 C50 10 100nF 50V 1206 Ceramic 2 C52 C53 10 1189 104042 400 100nF 50V Mono Ceramic 1 C112 10 1100 104043 000 330nF 100V Mono Ceramic 1 C31 10 47uF 35V Electrolytic 6 C8 C12 C13 C22 C34 C35 20 47uF 16V NP Electroly...

Page 25: ...2300 004100 004 4 Way Gold Plated Phono 4 CN14 CN17 2330 006900E001 2 Way Gold Plated Phono 1 CN18 2330 003911E034 400V 1A Rectifier Diode 7 D1 D3 D9 D12 1401 140040 000 100V 1A Schottky Rectifier 4 D4 D7 75V 150mA Signal Diode 3 D8 D14 D15 1401 141480 000 400V 1A Rectifier Diode 1 D13 1401 140040 000 1uH Ferrite On 24AWG Wire 3 FB3 FB5 1503 000000 100 Dual Audio Op Amp 10 U1 U9 U11 U12 U15 U20 NE...

Page 26: ...PY1235 80V 1 5A PNP Power 2 Q1 Q5 BD140 1301 140000E800 PY1230 80V 1 5A NPN Power 4 Q2 Q4 Q6 BD139 1300 139000E800 PY214 45V 300mA NPN Signal 3 Q7 Q8 Q10 BC337 25 1300 337000 100 PY219 45V 500mA PNP Signal 4 Q9 Q11 Q12 Q14 BC327 25 1301 327000 100 PY1211 30V 500mA NPN Darlington 1 Q13 MPSA14 1300 140000 100 RELAY TRANSISTORS Note resistors capacitors and other generic electronic componets are not ...

Page 27: ...W Carbon With xxxxxxxx Wurth ferrite beads added L2 24 5T 0 9mm Output Inductor C51 330pF 50V Ceramic C76 330pF 50V Ceramic Right W24 W23 W26 W25 1 2 5 6 2 4 1 3 1 2 RL2 A ME11 012 2Z4 Speaker A Relay R107 10K 1 8W Metal Film R106 10K 1 8W Metal Film 1 2 RL1 A ME11 012 2Z4 Speaker B Relay Q34 MPSA14 NPN Darlington D27 1N4004 Rectifier D28 1N4004 Rectifier D26 1N4004 Rectifier R103 10K 1 8W Metal F...

Page 28: ...V R49 1 8W Metal Film 18R Q27 2SA970GR PNP Low Noise Q19 MPSA42 NPN Signal Q20 MPSA42 NPN Signal Q17 MPSA42 NPN Signal Q18 MPSA42 NPN Signal R40 1 8W Metal Film 1K R41 1 8W Metal Film 47K R AMP C39 Electrolytic C29 Polyester 47nF 63V R AMP C38 Polyester 47nF 63V R AMP Q32 2SC2240GR NPN Low Noise R76 1 8W Metal Film 10R C30 Electrolytic R AMP R61 1 8W Metal Film 2K2 Q16 2SA970GR PNP Low Noise R37 1...

Page 29: ... 1 PR1 Multiturn Preset B200R Q6 2SC2240GR NPN Low Noise Q7 2SC2240GR NPN Low Noise C22 Electrolytic C10 Electrolytic R20 1 8W Metal Film 47K L AMP Q13 MPSA42 NPN Signal Q2 2SA970GR PNP Low Noise C21 Polyester 47nF 63V L AMP C9 Polyester 47nF 63V L AMP Q15 2SC2240GR NPN Low Noise Q14 2SA970GR PNP Low Noise R36 1 8W Metal Film 10R R23 1 8W Metal Film 10R C5 NP Electrolytic 47uF 16V R5 1 8W Metal Fi...

Page 30: ... Metal Film 100K R87 1 8W Metal Film 120K R89 1 8W Metal Film 15K R90 1 8W Metal Film 120K C55 NP Electrolytic 10uF 25V C54 NP Electrolytic 10uF 25V 1 2 3 4 5 6 7 8 CN2 Right Angle Pin Header 8 Way 1 2 3 4 5 6 7 8 CN8 Right Angle Pin Header 8 Way H1B H1A H15B H15A H9B H9A H4A H4B H3A H3B H2A H2B 50V P H5A H5B H8A H8B 50V P H7B H7A H1B H1A H2B H2A H3B H3A H4B H4A H5B H5A H6B H7B H7A H8B H8A H6B 1 2...

Page 31: ...lyester 39nF 250V C60 Metallised Polyester 39nF 250V C41 105deg Electrolytic 6800uF 63V C44 105deg Electrolytic 6800uF 63V C43 105deg Electrolytic 6800uF 63V C42 105deg Electrolytic 6800uF 63V C27 105deg Electrolytic 6800uF 63V C24 105deg Electrolytic 6800uF 63V C26 105deg Electrolytic 6800uF 63V C25 105deg Electrolytic 6800uF 63V C73 Ceramic 1nF 50V C74 Ceramic 1nF 50V W7 W8 W10 W9 W11 W12 W13 W1...

Page 32: ...Cambridge Audio Azur 740A Amplifier AP19794 3 Amp PCB Board Layout Top Side La rry R To enhance viewing please print to A3 32 ...

Page 33: ...Cambridge Audio Azur 740A Amplifier AP19794 3 Amp PCB Board Layout Bottom Side To enhance viewing please print to A3 33 ...

Page 34: ...5K 1 8W Metal Film 4 R85 R89 R95 R100 1 18K 1 8W Metal Film 4 R79 R124 R126 R127 1 22K 1 8W Metal Film 2 R12 R57 1 22K 1 4W Metal Film 2 R18 R43 1 47K 1 8W Metal Film 11 R20 R41 R74 R101 R102 R123 R125 R128 R131 1 47K 1 4W Metal Film 2 R48 R114 1 51K 1 4W Metal Film 4 R25 R33 R62 R71 1 100K 1 8W Metal Film 14 R2 R22 R31 R38 R42 R47 R63 R69 R86 R88 R96 R99 R109 R112 1 120K 1 8W Metal Film 6 R87 R90...

Page 35: ...aker 1 CN7 Fully gold plated brass with AP design knobs 200V 2A Rectifier 8 D1 D4 D12 D15 Stand Off PCB by 10mm 75V 150mA Signal Diode 11 D5 D10 D18 D24 D25 D31 D32 1401 141480 000 400V 1A Rectifier 10 D11 D19 D22 D26 D30 1401 140040 000 5V1 1 2W Zener 2 D16 D17 1402 511201E200 F8A LBC Fast Blow Fuse 4 F1 F4 Fuse Holder Base 4 F1 F4 20mm Pitch alt Camden YN 4031 140000E000 Fuse Holder Cover 4 F1 F...

Page 36: ...00 PY537 300V 500mA NPN Signal 2 Q19 Q20 MPSA42 1300 420000 100 Q19 Q20 Matched to 2 120V 100mA PNP Low Noise 2 Q21 Q22 2SA970GR 1301 970000 100 Q21 Q22 Matched to 2 PF075 30V 500mA NPN Darlington 2 Q34 Q35 MPSA14 1300 140000 100 PY016 160V 15A PNP Power 4 Q51 Q53 Q56 Q58 SAP15PY 1301 150000 700 PY010 160V 15A NPN Power 4 Q52 Q54 Q55 Q57 SAP15NY 1300 150000 700 Note resistors capacitors and other ...

Page 37: ... VDD 5V R5 220R 0805 Thick Film 1 2 6 5 4 NC 3 U2 4N25 Opto Isolator 5 6 4 U1 B HEF4011BT VSS LOGIC GND VDD 5V 1 2 3 U1 A HEF4011BT VSS LOGIC GND VDD 5V 12 13 11 U1 D HEF4011BT VSS LOGIC GND VDD 5V 5V R4 2R2 1 4W Metal Film R3 100R 0805 Thick Film C4 100nF 25V 0805 Ceramic LOGIC GND C8 100nF 25V 0805 Ceramic A BUS B 1 2 3 4 R46 47R 0805 Thick Film C7 10uF 16V Electrolytic C34 100nF 50V Monolythic ...

Page 38: ...R41 R42 C24 C22 R40 R48 C31 R37 C19 R36 C20 C21 R38 R35 R39 R47 C30 U4 C16 R33 C18 R34 R30 R32 C17 C15 R31 R27 C12 R29 C13 C14 R25 R28 R26 R13 R14 R11 R12 R22 R23 R20 R21 Q4 R19 D6 D3 D5 D4 R18 R17 C9 R24 C11 R16 R15 R9 R10 Q2 R7 R8 R6 Q3 C6 C1 C2 Q1 R50 C4 R3 C5 R5 C3 R49 R46 C32 C33 C7 C8 R2 R1 R51 C10 C36 CN2 R4 CN1 C28 U3 U7 D1 D9 To enhance viewing please print to A3 38 ...

Page 39: ...Cambridge Audio Azur 740A Amplifier AP19925 1 Abus PCB Board Layout Bottom Side To enhance viewing please print to A3 39 ...

Page 40: ...V 0805 NP0 Ceramic 2 C5 C11 5 1nF 50V Ceramic 1 C35 10 1100 102043 000 100nF 25V 0805 Ceramic 8 C2 C4 C6 C8 C16 C23 C33 10 100nF 50V 1206 Ceramic 2 C27 C29 10 1189 104042 400 100nF 50V Monolythic Ceramic 1 C34 10 1100 104043 000 10uF 16V Electrolytic 3 C1 C7 C32 20 1102 100014 000 10uF 35V Non Polarised Electrolytic 4 C14 C15 C21 C22 20 33uF 25V Low ESR Electrolytic 1 C28 20 47uF 25V Polarised Ele...

Page 41: ... 301100 001 Quad 2 Input NAND Gate 1 U1 HEF4011BT 4140 110102E100 CD4011BCM Fairchild MC14011BD ON PY1144 Opto Isolator 1 U2 4N25 4142 500050 001 Add X to PN for VDE app PY1007 37KHz IR Receiver 1 U3 TSOP34837 3001 348370 000 Op Amp 2 U4 U5 NJM5532M 4155 320101 600 12V 1A Regulator 1 U6 L7812 4178 120302 600 PY755 36KHz IR Receiver 1 U7 TSOP34836 3001 348360 000 IR Demodulator 2 M1 M2 6074 150001 ...

Page 42: ...wer Amp supplies 1 2 RL2 A 12V 8A 2P2T Relay D11 Rectifier Diode 1N4004 R24 1k 1 8W Metal Film R25 10k 1 8W Metal Film Q4 MPSA14 NPN Darlington F1 30VDC 1 1A Polyfuse F2 30VDC 1 1A Polyfuse W11 Switch W12 Switch W23 W22 W24 W25 R3 220R 2W Carbon W9 Transformer ES Screen connection 3 4 5 RL1 B 2P2T Relay 12V 8A 3 4 5 RL2 B 2P2T Relay 12V 8A 6 7 8 RL1 C 2P2T Relay 12V 8A 6 7 8 RL2 C 2P2T Relay 12V 8...

Page 43: ...Cambridge Audio Azur 740A Amplifier AP19789 5 Mains PCB Board Layout Top Side To enhance viewing please print to A3 43 ...

Page 44: ...Cambridge Audio Azur 740A Amplifier AP19789 5 Mains PCB Board Layout Bottom Side To enhance viewing please print to A3 44 ...

Page 45: ...der 1 CN4 2300 003100 004 400V 1A Rectifier Diode 2 D1 D11 1401 140040 000 30VDC 1 1A Polyfuse 2 F1 F2 4030 301100 001 T8AL Slow Blow Fuse 1 FU5 Fuse Holder Base 1 FU5 20mm Pitch Fuse Holder Cover 1 FU5 20mm Pitch PY594 12V 8A 2P2T Relay 2 RL1 RL2 ME11 012 2Z4 4050 110122 001 PY1211 30V 500mA NPN Darlington 2 Q3 Q4 MPSA14 1300 140000 100 RELAY TRANSISTORS Cambridge Azur 740A Mains PCB Assembly BOM...

Page 46: ... PCB Q2 Q3 Q5 Q6 Preamp PCB Q2 Q3 Q4 Q6 BC327 25 Input PCB Q7 Preamp PCB Q9 Q11 Q12 Q14 BC337 25 Input PCB Q8 Front Panel PCB Q1 Q2 Q3 Preamp PCB Q7 Q8 Q10 MPSA14 Input PCB Q9 Main PCB Q3 Q4 Amp PCB Q34 Q35 Preamp PCB Q13 NE5532 Input PCB U1 U5 U6 U7 U9 U10 U12 U13 U14 U15 U16 U17 U18 L7915CV Input PCB U2 46 ...

Page 47: ...L7805 Input PCB U3 L7815CV Input PCB U4 LM393A Input PCB U8 TC9163AF Input PCB U11 Preamp PCB U10 PIC16F877A I P Front Panel PCB U1 M74HC4094B Front Panel PCB U2 47 ...

Page 48: ...anel PCB U3 M74HC02 Front Panel PCB U4 NE5532P Front Panel PCB U100 U200 Preamp PCB U1 U9 U11 U12 U15 U16 U17 U18 U19 U20 2SC2240GR Amp PCB Q1 Q6 Q7 Q15 Q23 Q24 Q26 Q32 2SA970GR Amp PCB Q2 Q5 Q11 Q14 Q16 Q21 Q22 Q27 48 ...

Page 49: ...Q28 Q29 Q30 Q33 Q39 Q42 Q46 Q47 Q48 MPSA42 Amp PCB Q9 Q10 Q12 Q13 Q17 Q18 Q19 Q20 Q31 Q36 Q37 Q38 Q40 Q41 Q43 Q44 Q45 Q49 SAP15PY Amp PCB Q51 Q53 Q56 Q58 SAP15NY Amp PCB Q52 Q54 Q55 Q57 YAC526 Preamp PCB U2 L7815 Preamp PCB U3 49 ...

Page 50: ...L7915 Preamp PCB U4 L7805 Preamp PCB U5 LM337T Preamp PCB U6 U7 LM317T Preamp PCB U8 LM393AP Preamp PCB U13 U14 HEF4011BT Abus Hub PCB U1 OP4N25 Abus Hub PCB U2 TSOP34837 Abus Hub PCB U3 50 ...

Page 51: ...NJM5532M Abus Hub PCB U4 U5 L7812 Abus Hub PCB U6 TSOP34836 Abus Hub PCB U7 BC846 Abus Hub PCB Q1 Q3 Q4 BC856B Abus Hub PCB Q2 51 ...

Page 52: ...tection circuit use with caution LCD TEST Press repeatedly 7 steps to check LCD segments until all segments are lit TEMP DT Enable disable the built in temperature detection and protection circuit use with caution COUNTERS This option accesses the following event counters CL Clipping events TM Over temperature events DC DC detection events SH Short circuit output events OV Overload events ON Numbe...

Page 53: ...ng this device To perform the update simply connect the lead from the programmer to the socket provided on the reverse of the front panel PCB Do not power on the unit as all power for re programming is taken from the programmer itself Once the appropriate hex file is loaded to the programmer pressing the red download button should be followed shortly by a green light on the programmer to indicate ...

Page 54: ...th a good quality PP3 battery when required You also need to purchase a flat 06 way 250mm cable assembly for example from Farnell Product Code 303Ͳ 2243 Procedure 1 Install the PC Software on to your PC with the supplied CD following the onscreen instructions If you already have the software installed there is no need to reinstall the software again 2 Unpack the following from the programmer kit b...

Page 55: ...cut off one of the plugs Strip and tin 5mm off each wire see picture below 6 Using the table below solder each wire together as follows see next page 10 pin IDC socket to wire assembly Flat 06 way 250mm cable assembly Red wire to wire 1 wire with the red stripe on it Blue wire to wire 2 Yellow wire to wire 3 Green wire to wire 4 55 ...

Page 56: ...your PC 11 Select the correct PIC Family and Device for the PIC you want to programme 12 Make sure the Program User ID box is ticked 13 Make sure the Match Device ID and Verify Configuration Bytes are unͲticked 14 Select the correct file location of the software you want to upload to the PIC by pressing the Browse button locating the correct HEX file and selecting Open The picture below shows the ...

Page 57: ...the Upload button in the PICkeyfob Programmer window to start the upload process into the PIC programmer 17 The following window will appear when the software is being uploaded 18 When the software has uploaded the above window will close Now press on the Finish button on the other window to complete the process The PC software will then close 57 ...

Page 58: ... the programmer with the 10 pin IDC to 10 pin IDC cable from the 10 pin IDC to parallel converter 21 Connect the modified cable assembly to the 10 pin IDC to 10 pin IDC cable socket 22 Programme the Cambridge Audio unit according to the separate instructions supplied where appropriate The process is now complete 58 ...

Page 59: ... 1 5nF 63V Met Polyester R L 15V 15V SHIELD_SUPPLY 1 2 3 4 CN4 4 Way Right Angle Header SHIELD_L2 SHIELD_R2 RIGHT LEFT 1 2 3 4 5 6 CN6 6 Way Right Angle Header 1 2 3 4 5 6 CN7 6 Way Right Angle Header RA RTB RC RA RBB RC RA RTB RBB RC LA LTB LC LA LBB LC LA LTB LBB LC VR1 A 5k Push Action Linear Pot VR1 B 5k Push Action Linear Pot VR2 A 5k Push Action Linear Pot C10 680nF 63V Met Polyester VR2 B 5...

Page 60: ... Ceramic 1 P1 C15 10nF 50V Ceramic VOLUME STROBE SPEAKER ABUS IR 5V SPEAKER A RELAY RC5 BLOCK RC5 TX C16 100nF 50V Mono Ceramic 5V C17 10uF 16V Electrolytic PHONES DETECT CONTROL BUS IR PREAMP RELAY SPEAKER A RELAY SPEAKER B RELAY SPEAKER B RELAY TO POWER AMP PCB TO PRE AMP PCB MAINS FAIL RC5 BLOCK RC5 TX POWER AMP RELAY 5V D1 Blue Azur LED POWER AMP RELAY DIRECT RELAY DIRECT RELAY SW10 KPT 1105A ...

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