Cambridge Audio 540R V2.0 Service Manual

Gallery Court Hankey Place London SE1 4BB UK

Tel: [phone] Fax: [phone]

540R V2.0

First Issue Date: 29th June 2006
Second Issue Date: 9th October 2006

SERVICE MANUAL

SPECIFICATIONS:

Audio Section

Power Output Front 100W RMSx2(8ohm, 1% THD)

Centre 100W RMS (8 ohm, 1% THD)
Surr. (L/R) 100W RMS x 2 (8 ohm, 1% THD)
Surr. Back 100W RMS (8 ohm, 1% THD)

Output Impedance Front (L/R) 8 ohm

Centre 8 ohm
Surr. (L/R) 8 ohm
Surr. Back 8 ohm

THD (unweighted) less than 0.05%

Line Input

Input Impedances 150mV/47k

Frequency Response 20Hz~25KHz+0.5/-1dB
Tone Control Range Bass ± 6dB - Treble ± 6dB
S/N ratio (ref 1W/8 Ohm) 75dB

Subwoofer Output

Rated Output/Impedance 150mV/10k
Frequency Response 10Hz~300Hz+3dB

FM Tuner Section

Frequency Range 87.5~108MHz
Sensitivity 14dB (5uV)
Antenna Terminal 75 ohm (unbalanced)

AM Tuner Section

Frequency Range 522~1629kHz, 9kHz step
Sensitivity 68 dB/M
Signal to Noise Range 30 dB
Antenna Loop Antenna

Power Requirement AC230V~50Hz
Max Power Consumption 615 Watts

Dimensions (W x D x H) 350 x 430 x 150

Weight 15.8kg

AP19914/3

Third Issue Date: 02nd February 2007

1

540R V2.0 SERVICE MANUAL

TABLE OF CONTENTS

Front Panel Information

3

Remote Control

4

Remote Control Function

5

Rear Panel Information

6

Exploded Diagram

7

Exploded Diagram Parts List

8-9

PCB Interconnect Diagram

10

Decoder PCB Schematic

11-13

Decoder PCB Board Layout

14-15

Main Board – Power Supply PCB Schematic

16

Power Output & Speaker Protection

17

Main/Video Out/Speaker Connections PCB Board Layout

18

OSD PCB Schematic

19

OSD / Co-axial in/out / Connect Board B / Control Bus)

20-21

YUV PCB Schematic

22

YUV PCB Layout

23

Input / Outputs PCB Schematic

24

Display Board PCB Schematic

25

Display / Volume / AV3 PCB Layout

26

Co-axial in/out / Control Bus PCB Schematic

27

Connect Board B

28

Connect Down PCB

29-30

AC Input / Relay / Headphones PCB Schematic

31

AC Relay / Headphones PCB Layout

32

Bill of Materials

33-38

IC Pin Layout Details

39-40

Serviceable Parts List

41

2

Cambridge Azur 540R V2.0 AV Receiver

Front Panel Information

1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21

Standby/On

Phones

- Tuning +

Mode/Store

Stereo Dolby DigitalEX

DTS ES

Pro Logic /

Neo 6

DSP

Mode

Input
Mode

Video Left Right

Video 3 Inpu ts

Volum e

azur 540R

AV Re ceive r

DVD

Video 1 Video 2 Video 3

Tun er FM /A M

Tape/MD/CDR

CD/Aux

6.1 Dire ct

NO. & NAME DESCRIPTION NO. & NAME DESCRIPTION

1. Standby /On

The power amplifier is in standby mode,
indicated by the stand by indicator.

12. V ideo 3 Inputs

Input for VCR, Video Camera Recorder,
etc. contains one video input and
Analog Left and Right inputs.

2. Standby Indicator 13. Volume

Rotate this knob clockwise or
counterclockwise, the master volume will
be increased or decreased.

3. Phones

Jack for the stereo headphones.

14. DVD

When the coaxial /optical output terminal
of a DVD player is connected to the
DVD COAXIAL/OPTICAL IN terminal
of this unit (5/6 rear panel), press this
button to activate this function.

4.Tuning+/-

Tuner frequency or preset stations up &
down.

15. V ideo 1

When the line output of an external
player is connected to the AV 1 terminal
of this unit (6/rear panel), or when the
digital /optical output of another player is
connected to the OPTICAL IN of this
unit (6/ rear panel), press this button to
activate this function.

5.Mode/Store

Press this button once to select Auto
tuning mode; press it the second time to
select the Manual tuning mode; press it
the third time to select the Preset tuning
mode, then by pressing the Tuning +/­button to select a preset station; pressing
and holding this button (in any of the
modes above) for 5 seconds brings up
the “MEM” icon and display the next
available preset for storing the current
frequency.

16. V ideo 2

When the line output of an external
player is connected to the AV 2 terminal
of this unit (6/rear panel), or when the
digital /optical output of another player is
connected to the OPTICAL IN of this
unit (6/ rear panel), press this button to
activate this function.

6.Stereo

With the unit in the STEREO mode,
only front left and front right speakers
and Subwoofer are working.

17. V ideo 3

When you want to use Video 3 inputs,
pressing this button to activate this
function.

7.Dolby Digital EX

DTS ES

Digital Surround Mode

18. T uner FM/AM

8.Dolby
Pro Logic II
/NEO 6

Surround modes for analog sources

19. T ape/MD/CDR

Press this button when operating the tape
deck.

9.DSP Mode

Press this button to choose one of the
following surround modes: THEATER,
HALL, PASSTHRU, MOVIE, MUSIC
and ROOM.
Analog or digital

20. CD/Aux

When the coaxial output terminal of a
CD player is connected to the CD
COAXIAL IN terminal of this unit (5/
rear panel), press this button to activate
this function.

10.Input Mode

Press this button to select input modes:
ANA, OPT and COAX when using
digital in.

21. 6.1 Dir ect

Press this button to select the 6.1
analogue input.

11. Remote Sensor

To listen to the radio broadcast, press this
button to activate this function, press
again to switch waveband.

3

Cambridge Azur 540R V2.0 AV Receiver

Remote Control

1

5

8

11

13

16

19

23

26

29

21

25

22

18

17

12

9

6

3

2

10

30

7

20

4

14

15

24

28

27

4

NO. & NAME DESCR I PT ION NO. & NA ME DESCR I PT ION

1.
Power On/Standby

Pressthisbuttontoturnthisunitonor
off .

16.
/Volumeup

-Directionbutton.

- P ress thes e buttons to i ncr ease the
volume.

2.
Input Mode

P ress i t to s elec t:

17.
/Tunedown

- D ir ecti on button.

- T uner f requency down.

3.
St er eo

With this unit in ST ER E O mode, only
FrontLeft& FrontRightspeakersand
Woof er hav e output.

18.

Enter

Pr ess thi s button w hen y ou w ant to enter
the O SD setup menu.

4.
PL II /NEO 6

When receiving Analog/digital PCM
signals.

19.
/Tuneup

-Directionbutton.

- T uner f requency up.

5.
DDEX /DTSES

For digital surround signals

20.
/ V ol ume d own

-Directionbutton.

- P ress thes e buttons to dec rease the
volume.

6.
DSP MODE

Pr ess thi s button to choos e one of the
following surround modes: THEATER ,
HAL L, PASSTHRU, MOVIE, MUSIC
and ROOM.

21.

Tuner AM/FM

Pr ess thi s button to al terna te between F M
and A M.

7.
Dynamic

P ress thi s button r epeatedl y to r each y our
desired compression dynamic range.

22.

B ass/ Treble

Pr ess thi s button f or B a ss / T r eb le
adj ustment, then pr ess V ol up and V ol
dow n to a djust the l evel .

8.
LFE Trim

Under the Pro L ogic 5.1CH or DT S

5.1C H mode, press this button and adjust
thevolumetosettheLowFrequency
output l evel

23.

6.1 Dir ect

Pr ess thi s button to s elec t the 6 .1 ana logue
input.

9.
TestTone

T o bal anc e s peak ers i n D ol by D i gi tal or
Dolby ProLogic mode.

24.

PTY

I n F M state, pr ess thi s button, the cur rent
program type appears onthe display, using
T uni ng +/- to s elec t the pr ogram t ype y ou
desi r e.

10.
CH Select

S elec t cha nnels by pus hing thi s button,
thenusevolumekey tobalancespeakers

25.

APS

Allocates and memorizes radiostations
automatical ly.

11.
Sub On/Off

Pr ess thi s button to turn on/of f the output
of s ubwoof er.

26.

Display

W ith R D S , pr ess thi s button r epeatedly to
hav e P S ( progr am name) or C T (c urrent
ti me).

12.
Delay

Pr ess thi s button to set the del ay ti me f or
the Dolby digital/Dolby Pro Logic modes.

27.

St er eo / M on o

Pr ess thi s button to al terna te between
S tereo and M ono mode w hen l i sten to F M
bro adcas t.

13.
SPK Setup

Under PRO LOGIC II or Digital state, it
can cha nge the des ir ed S peak er S etti ng
shownonthedisplay.

28.

Store

Pr essi ng thi s button to s tore the c urrent
frequency.

14.
OSD

Pr ess thi s button to ac cess the A V
Receiver configuration settings by using
the O S D menus .

29.

Mode

Pr essi ng thi s button to s elec t A uto /M anual
tuni ng mode and P reset mode.

15.
Mute

Pr ess thi s button to mute the sound, push
again to cancel the mute f unction.

30.

I n put S el ect or

Pr ess the c orr esponding button ac cordi ng
to y our desi red s elec tion.

Cambridge Audio Azur 540R V2.0 AV Receiver

Remote Control Function

Digital or Analogmode.

5

Cambridge Azur 540R V2.0 AV Receiver

Rear Panel Information

1 2 3 4 5 6 87 10 11 12 13

141516171819 18

9

1. FM / AM antenna

2. TV /Mon Out
S-V ideo out ….. using the S-Video cable to connect this terminal to the corresponding terminal on the TV set.
C omposite Video out ….. using the RCA cable to connect this terminal to the corresponding terminal on the TV

set.

3. S-V ideo in
V ideo 1 / Video 2 ….. connect to the corresponding output terminals of a VCR.
DVD ….. connect to the corresponding line output terminal of a DVD player.

4. C ompositeV ideo in
V ideo 1 / Video 2 ….. connect to the corresponding output terminals of a VCR.
DVD ….. connect to the corresponding line output terminal of a DVD player.

5. C oax in
CD ….. digital audio input to the digital output of a CD player.
V ideo 1 / Video 2 ….. digital audio input to the digital output of a VCR.
DVD ….. digital audio input to the digital output of a DVD player.

6. Optical in
CD ….. optical audio input to the optical output of a CD player.
V ideo 1 / Video 2 ….. optical audio input to the optical output of a VCR.
DVD ….. optical audio input to the optical output of a DVD player.

7. Optical Out ….. digital audio output to the digital optical input of another amplifier, external recording device or

decoder.

8. C oax Out ….. digital audio output to the digital coaxial input of another amplifier, external recording device or
decoder.

9. Contr ol Bus terminal …… This terminal is used for our system controlling.

10. C omponentV ideo In
DVD ….. connect to the Cr Cb Y terminal of a DVD player.
V ideo 1 / Video 2 ….. connect to the Cr Cb Y terminal of external players.

11. C omponentV ideo Out ….. connect to the Cr Cb Y terminal on the TV set.

12. R eset ….. this is used to reset the whole system (including the memories set).

13. Power On / off ….. pressing this switch to turn on /off this unit.

14. Power AC ….. connect to the AC socket.

15. Speaker terminals ….. connect to the external speakers with 4~8 impedance.

16. 6.1 Pr eamp Out ….. connect to the 7 channel input terminals of another amplifier.

17. 6.1 D irect In ….. connect to the 7 channel output terminals of another player.

18. A udio In
Tape Rec ….. connect to the line input terminals on the Tape Deck.
Tape Play ….. connect to the line output terminals on the Tape Deck.
DVD ….. connect to the line output terminal of a DVD player.
V ideo 1 / Video 2 ….. connect to the line output terminals of external players.
CD / Aux ….. connect to the line output terminal of a CD player.

19. R S232C ……. This terminal is used for software upgrade.

6

Cambridge Audio Azur 540R V2.0 AV Receiver

Exploded Diagram

To enhance viewing, please print to A3 7

Cambridge Audio Azur 540R V2 AV Receiver

Spare Parts Exploded Diagram

krameR.ytQnoitpircseD.ONtraP.leS

1 6531 1010 0011 VOLUMN KNOB AL SKIN 1

1BONKNMULOVPMA0000040113372

1revoc3VA1900001113973

86X0.3BTBWERCS00006

00341054

1SNELYALPSID0800010113475

1LENAPLA1220010113066

1EDIUGTHGILPMA0000030113477

8 5331 1010 0000 SCALEBOARD 1

01NMULOCBCP00000201

13979

10 7631 1010 0000 MR CONTROL BOX BUTTON CUSHION 1

11 7331 1010 0011 MR CONTROL BOX BUTTON 1

12 0554 0117 1001 PHONE PCB 1

13 5011 3014 1000 SCREW BTB3.0X14 10

14 7631 1020 0000 7MM TAC SWITCH BUTTON CUSHION 8

15 7331 1020 0011 7MM TAC SWITCH BUTTON 8

16 7631 1030 0000 4MM TAC SWITCH BUTTON CUSHION 8

17 7331 1030 0011 4MM TAC SWITCH BUTTON 8

514X0.3BTBWERCS00014003110581

1SNELRI00000201134791

20 0054 1030 0004 VOLUMN PCB 1

21 0054 1030 0004 DISPLAY PCB 1

1NOITAROCED11000101139722

23 0054 1083 2005 AV3 PCB 1

4DAPTOOF1000060113

9742

4TOOF11000501139752

48X0.3MB00018003210562

27 7531 1040 0000 540R front support right assy 1

1)THGIR(REVOCEDIS11000201134682

29 7531 1050 0000 540R rear support right assy 1

30 7531 1020 0000 540R front support left assy 1

88X6.2BTBWERCS000080624

10513

1)TFEL(REVOCEDIS11000101134623

1REVOCPOT11000101131633

88X6.2MBWERCS00018062810543

646X0.3BTBWERCS0

0016003110553

1yssatfeltroppusraerR04500000301135763

37 0054 0110 1001 FUSE PCB 1

401=HNS01-SBC00000000117883

1REVOCMOTTOB1100010113

2693

1CVPBCP01050040807704

76=HNS6-SBC00000006017814

204=H283-TDDK00000000437824

242=LTLOB00000301139534

2

23=LTLOB00000101139544

1NAF13233152201954

2)3Hx4Dx01D(HSAW00000701139764

103=HNS03-SBC00000000317874

8

Cambridge Audio Azur 540R V2 AV Receiver

Spare Parts Exploded Diagram

2TEKCARBNAF00000301133584

1TEKCARBBCPEDOCED00000601133594

2TEKCARBKNISTAEH00000201133505

1KNISTAEH000001

01131515

2NMULOCKNISTAEH00000201139525

53 0054 1003 2005 MAIN PCB 1

54 5040 8000 0001 WASH

28

1TLOB04000808510555

56 5331 1050 0011 TRANSFORMER BRACKET 1

428X0.3BTBWERCS00018003110575

58 5020 3006 0360 NUT

22.3

59 5040 0300 0000 SPRING WASHER

20.3

60 5030 0800 3210 WASH

3.2 x 8.0 x 1.0mm 2

1REMROFSNART00005101000416

62 5020 8012 0201 NUT

18

13MREHSAWGNIRPS10000003040536

1LAERUTAREPMET00000501139546

65 0054 1140 1002 YUV PCB 1

248x0.3APWERCS0008003310566

1REVOCKCAB1110

0301133676

68 0054 1241 1006 OSD PCB 1

69 0054 1233 2005 OUTPUT PCB 1

70 0054 1381 2006 COAX PCB 1

1XOBRENUT10003000008917

72 0054 1280 1005 DECODE PCB 1

73 0054 1321 3006 CONNECT PCB(T) 1

74 0054 1321 0003 CONNECT PCB(B) 1

1BCP232S00003229450057

76 0054 1221 4006 CONTROL PCB 1

1REMROFSNARTSBTS00015531000477

9

Cambridge Audio Azur 540R V2 AV Receiver

PCB Interconnect Diagram

Power Cordin

2P

CN3

FAN

2P

CN2

2P

CN3

2P

CN4

2P

CN1

3P

CN5

3P

CN11

2P

CN9

2P

CN8

2P

CN6

2P

CN22

3P

CN21

3P3P

3P

CN2

2P

CN4

2P

CN1

2P

CN23

3P

CN7

3P

CN7

3P

4P

J200

4P

CN17

2P

CN1

6P

CN5

6P

J1

16P

J2

16P

CN5

7P

J1

7P

CN10

5P

J2

5P

CN2

5P

13P

CN4

13P

CN1

5P

CN3

5P

CN5

7P

CN6

7P

CN1

6P

CN36PCN2

6P

CN5

6P

2P

3P

7P

CN20

10P

CN16

2P

CN4

2P

HEAT-VARIABLE
RESISTOR

Transformer

Transformer

Earphone

Board

Display Board

AV3 Board

Volume

Board

Main Board

Decoder Board

Relay Board

YUV

Board

Remote

Board

Speaker Board

Switch

Board

Coaxial

Board

OSD Board

Upgrade

Board

Tuning

Board

10

Cambridge Audio Azur 540R V2.0 AV Receiver

Decoder PCB Schematic (1of 3)

C29
104

C30
104

C28
104

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C2
10/16

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4.7K

R564.7K

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104

C32

104

C33

104

C34

104

C35
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471

+

C70

2.2/50

+

C71

2.2/50

+

C72

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47/25

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R100
33

R103 33

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R101 33
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10K

R6

10K

R10

10K

R810K

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2

D2

3

D3

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D4

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D5

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D6

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D7

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P2.2

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P2.3

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R29 10K

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R27 10K

R26 10K

R25 10K

R24 10K

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R42 10K

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R19 10K

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AGND

VOL-DATA

DGND

VOL-CLK

R106

2.4K

3

RESET

36

INTREQ_ABOOT

20

SCCLK_A0

7

SCDIO_SCDOUT_PSEL_GPIO9

19

DC

38

DD

37

VD11VD212VD3

23

VA

34

SC

18

SCDIN_A1

6

DGND213DGND12AGND35DGND3

24

EMAD0_DATA0_GPIO0

17

EMAD1_DATA1_GPIO1

16

EMAD2_DATA2_GPIO2

15

EMAD3_DATA3_GPIO3

14

EMAD4_DATA4_GPIO4

11

EMAD5_DATA5_GPIO5

10

EMAD6_DATA6_GPIO6

9

EMAD7_DATA7_GPIO7

8

EXTMEM_GPIO8

21

WR_DS_EMWR_GPIO10

4

RD_R/W_EMOE_GPIO11

5

MCLK

44

SCLK

43

LRCLK

42

AUDATA0

41

AUDATA1

40

AUDATA2

39

XMT958_AUDATA3

3

CMPCLK_SCLKN2

28

STCCLK_SCLKN1

25

LRCLKN1

26

CMPREQ_LRCLKN2

29

CLKSEL

31

FLT2

32

FLT1

33

CMPDAT_RCV958_SDATAN2

27

SDATAN1

22

CLKIN

30

IC8

CS493263-CL

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2P2.5

DGND

R34 10K
R35

10K

R36

10K

R37

10K

DGND1

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DGND

C48

104

+

C77

47/25

C49

104

Q3

C3361

R50

10K

Q4

A950

TU-L

TU-R

AGND

AGND AGND

AGND

AGND

12V

TU+12V

112233445

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CN2

5P2.0

R33 10K

DGND

MCU

DSP

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DGND

Q5

14

Q6

13

Q7

12

Q1

4

Q2

5

Q3

6

Q4

7

Q8

11

QS

9

CS

10

CLK

3

SDA

2

STR

1

OE

15

VDD

16

VSS

8

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DGND1

DGND1

DGND1

AGND

AGNDAGND AGND

AOUTA1+

36

AOUTA1-

37

AOUTB1+

35

AOUTB1-

34

AOUTA2+

32

AOUTA2-

33

AOUTB2+

31

AOUTB2-

30

AOUTA3+

28

AOUTA3-

29

AOUTB3+

27

AOUTB3-

26

AOUTA4+

22

AOUTA4-

23

AOUTB4+

21

AOUTB4-

20

MUTEC

38

AINL+

15

AINL-

16

AINR+

14

AINR-

13

VQ

17

FILT+

18

REFGND

19

LPFLT

39

AGND

40

AGND

25

DGND52DGND

5

VLC

6

VD4VD

51

VARX

41

VA

24

RMCK

55

SAI_SCLK

61

SAI_LRCK

60

SAI_SDOUT

54

CX_SCLK

2

CX_LRCK

3

CX_SDOUT

56

CX_SDIN1

1

CX_SDIN2

64

CX_SDIN3

63

CX_SDIN4

62

RESET

12

SCL/CCLK

7

SDA/CDOUT

8

INT

11

AD1/CDIN

9

AD0/CS

10

RXP7_GPO7

42

RXP6_GPO6

43

RXP5_GPO5

44

RXP4_GPO4

45

RXP3_GPO3

46

RXP2_GPO2

47

RXP1_GPO1

48

RXP0

49

TXP

50

VLS

53

OMCK

59

ADCIN2

57

ADCIN1

58

IC9 CS42518-CQ

DA/AD

R46
10K

DGND1

3
3

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R118

22K

R107

2.4K

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D3
4148

D2
4148

D1
4148

MUTE

DGND

DGND

DGND

DGND

C42
104

DVD/DSP

'9''63

6<9'(/

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CN3

5P2.0

R110
33

JP1
0

DGND

JP20JP3

0

JP4

del
JP5

0

3816MUTE

R246

10K

R251

22K

Q8

A1131

R249
10K

SUBMUTE

Q9

C3361

R252

10K

DGND

11223

3

CN8
3P2.0

DGND

,5

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12_NC3

12_NC2

12_NC1

11NC34

11NC33

11NC32

11NC12

11NC1

13NC9

R262

220

R263

220

R264

220

R265 330

L6
FB

VIN

3

GND

1

VOUT

2

IC18

LD1117S3.3(SOT-223)

DGND1

To enhance viewing, please print to A3 11

Cambridge Audio Azur 540R V2.0 AV Receiver

Decoder PCB Schematic (2 of 3)

2

3

1

4

IC1A

2068

R201

2.94K

C158

182

R218

6.19K

C183

390

AGND

R177

5.49K

R185

1.65K

R209

887

R193

1.87K

C150

562

AGND

+

C165

22/16

AGND

6

5

7

8

IC1B

2068

R202

2.94K

C159

103

R217

6.19K

C182

473

AGND

R178

5.49K

R186

1.65K

R210

887

R194

1.87K

C151

104

AGND

+

C166

22/16

AGND

2

3

1

4

IC2A

2068

R203

2.94K

C160

182

R221

6.19K

C185

390

AGND

R179

5.49K

R187

1.65K

R211

887

R195

1.87K

C152

562

AGND

+

C168

22/16

AGND

6

5

7

8

IC2B

2068

R204

2.94K

C161

182

R220

6.19K

C184

390

AGND

R180

5.49K

R188

1.65K

R212

887

R196

1.87K

C153

562

AGND

+

C169

22/16

AGND

2

3

1

4

IC3A

2068

R199

2.94K

C156

182

R215

6.19K

C181

390

AGND

R175

5.49K

R183

1.65K

R207

887

R191

1.87K

C148

562

AGND

+

C164

22/16

AGND

6

5

7

8

IC3B

2068

R200

2.94K

C157

182

R216

6.19K

C180

390

AGND

R176

5.49K

R184

1.65K

R208

887

R192

1.87K

C149

562

AGND

+

C167

22/16

AGND

2

3

1

4

IC4A

2068

R206

2.94K

C163

182

R219

6.19K

C187

390

AGND

R182

5.49K

R190

1.65K

R214

887

R198

1.87K

C155

562

AGND

+

C171

22/16

AGND

6

5

7

8

IC22B

2068

C64

104

AGND

C65

104

AGND

C67

104

AGND

C66

104

AGND

C62

104

AGND

C63

104

AGND

C69

104

AGND

C68

104

AGND

-7V

+7V

LS-

LS+

FR-

FR+

FL-

FL+

SURRR-

SURRR+

RS-

RS+

C-

C+

LEF-

LEF+

BL

C172

122

AGND

C173

122

AGND

C179

122

AGND

C175

122

AGND

C174

104

AGND

C176

122

AGND

C177

122

AGND

+

C5

10/16

+

C6

10/16

+

C25

10/16

R63

47K

R131

1K

+

C14

10/16

R66

47K

R127

1K

AGND

+

C15

10/16

R62

47K

R128

1K

+

C24

10/16

R64

47K

R130

1K

+

C23

10/16

R65

47K

R129

1K

R205

2.94K

C162

182

R222

6.19K

C186

390

AGND

R181

5.49K

R189

1.65K

R213

887

R197

1.87K

C154

562

AGND

+

C170

22/16

AGND

SURRL-

SURRL+

BR

C178

122

AGND

+

C27

10/16

R132

1K

+

C13

10/16

+

C12

10/16

+

C11

10/16

+

C10

10/16

+

C9

10/16

+

C8

10/16

+

C7

10/16

+

C82

47/25

+

C83

47/25

C122

104

C123

104

AGND

BL/BS

FLFRLS

RS

SW

C

GND

GND

GND

GND

VIDEO2L

VIDEO3L

VIDEO3R

DVDR

DVDL

VIDEO1L

TAPER

CD/AUXR

CD/AUXL

TAPEL

BASS

TREBLE

CD-RI2CD-LI3MD/DAT-RI4MD/DAT-LI5TAPE-RI6TAPE-LI7TUNER-RI8TUNER-LI9VIDEO-RI10VIDEO-LI11PHONO-RI12PHONO-LI

13

AGND

1

AGND

14

A-RI/O

74

A-LI/O

75

TAPE-RO

76

TAPE-LO

77

VIDEO-RO

78

VIDEO-LO

79

AGND

80

AGND

73

INGSW

INPUT
SELECT

VOL

DSP-FR

26

DSP-FL

27

DSP-C

28

DSP-SR

29

DSP-SL

30

DSP-CB

31

DSP-SW

32

FR-O

54

FL-O

53

SW-O

46

AGND

47

CB-O

48

SL-O

49

SR-O

50

C-O

51

AGND

52

BAS1

55

BAS2

56

BAS3

57

BAS4

58

TRE1

59

TRE2

60

AGND

61

DVD-FR

15

DVD-FL

16

DVD-C

17

DVD-SR

18

DVD-SL

19

DVD-CB

20

DVD-SW

21

FR-VI

64

FR-SO65FL-SO

63

FL-VI

62

C-SO

43

C-VI

44

SR-VI

42

SR-SO41SL-SO

39

CB-SO

37

SW-SO

34

SW-VI

35

CB-VI

38

SL-VI

40

TODSP-L24TODSP-R23AGND

25

AGND

22

AGND

33

AGND

36

AGND

45

VCC

72

VEE

71

AGND

70

DGND66MUTE67CLK68DATA

69

LOGIC

6.1CH
SELECT

IC17

BD3816K1

+C16

10/16

+

C17

10/16

+

C18

10/16

+

C22

10/16

+

C21

10/16

+

C20

10/16

+

C19

10/16

R160

68K

R161

68K

R164

68K

6

5

7

8

IC4B

2068

R162

68K

R225

4.7K

C147

333

C190

331

C128

104

R166

68K

R224

6.8K

R163

68K

R165

68K

LEF

+

C137

100/16

+

C136

100/16

AGND

AGND

AGND

AGND

AGND

AGND

AGND AGNDAGND

C130

104

R152

150

R154

150

R157

150

R158

150

12V

-12V

R223

2.2K

AGND

R126

1K

R125

1K

AGND

AGND

AGND

AGND

BRin

VIDEOR

VIDEO1R

AGND

R70

47K

R73

47K

R69

47K

R71

47K

R72

47K

R78

47K

R79

47K

R80

47K

R81

47K

R82

47K

R83

47K

R84

47K

R85

47K

R86

47K

R87

47K

R88

47K

R89

47K

DVDBR

DSPBR

AGND

+

C135

100/16

+

C134

100/16

R151

150

R153

150

R156

150

R155

150

AGND

BROUT

AGND AGND

C124

104

R57

4.7K

R58

4.7K

C125

104

C126

104

C127

104

AGND

AGND

C189

472

C188

472

AGND

VOL-DATA

VOL-CLK

3816MUTE

L-O

R-O

R76

47K

R77

47K

TU-R

TU-L

7.1 CH USE

VOL

R68

47K

R67

47K

R75

22K

R74

47K

R167

68K

+

C26

10/16

AGND

2

3

1

4

IC22A

2068

AGND

C129

104

R245220

R232220

R231220

R230220

R229220

R228220

R227

220

R22633K

R237220

R238220

R235220

R236220

R239220

R240220

R241220

R242

220

R243220

R244220

R234220

R233220

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859

60

CN7

60P2.0*2

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

BROUT

GND

6.1CH=56P

RECL

RECR

SW OUT

BL/BSOUT

SL OUT

SR OUT

COUT

FLOUT

FR OUT

R247

2.2K

R250
100K

R248

10K

Q7
C3326

AGND

SUBMUTE

C191
104

AGND

-vv

C194
102

AGND

C195
102

AGND

C196
102

AGND

C201
104

AGND

C198
102

AGND

C197
102

AGND

C200
102

AGND

C199
102

AGND

To enhance viewing, please print to A3 12

Cambridge Audio Azur 540R V2.0 AV Receiver

Decoder PCB Schematic (3 of 3)

6

5

7

8

IC20B

2068

6

5

7

8

IC21B

2068

C85

471

R121

2.8K

R133 634

R141

90.9

R134

634

R135

634

R142

90.9

R51
10K

R145

332

R139

3.32K

R123

1K

C86 471

C50

104

C51

104

C52
104

+

C99
100/10

+

C98

100/10

C108
272M

AGND

AGND

AGND

AGND

2

3

1

4

IC20A

2068

2

3

1

4

IC21A

2068

C87

471

R122

2.8K

R136 634

R143

90.9

R137

634

R138

634

R144

90.9

R52
10K

R146

332

R140

3.32K

R124
1K

C88 471

C53

104

C54

104

C55
104

+

C101
100/10

+

C100

100/10

C109

272M

AGND

AGND

AGND

AGND

AINR+

AINR-

AINL+

AINL-

R-O

L-O

R119

1.5K

R120

1.5K

AGND

AGND

AGND

AGND

C56
104

C57
104

+

C102

100/10

1 3

2

IC16
KA7805A

5VA

AC1

V+

A

C2

-V

D5
DB104G

AC1

V+

A

C

2

-V

D4
DB104G

+

C138

2200/16

C114
104

1

1

2

2

3

3

4

4

5

5

5P

J2

5P2.5

VIN

1

GN

D

2

VOUT

3

U1
KA7805

+

C141
100/10

C115
104

5VD

+

C139

3300/25

C118
104

VIN

1

GN

D

2

VOUT

3

U2
KA7812

+

C143

47/25

C120
104

+

C140

3300/25

C121
104

+

C144
47/25

C119
104

VIN

2

GN

D

1

VOUT

3

U4
KA7912A

12V

-12V

R169

1W/0.22(RF)

R170

1W/0.22(RF)

R168

1W/0.22(RF)

I

3

A

1

O

2

U3
LD1117DT25

C116
104

+

C142
47/25

C117
104

AGND

2.5VD

AGND

2.5V

5VD

DGND

DGND

IN1

1

IN2

3

AGND

2

AGND

4

VEE

5

AGND

6

VCC

7

CLK

8

DATA

9

MUTE

10

DGND

11

SEL

12

OUT2

13

OUT1

14

LOGIC

IC15

BD3812F

Y1

1

Y0

2

VEE

7

VS

S

8

YCOM

15

VDD

16

X1

13

X0

12

XCOM

14

Z1

3

Z0

5

ZCOM

4

A

11

B

10

C

9

INH

6

IC14
TC4053BF

7.1 CH USE

DVDBR

DSPBR

VOL-CLK

VOL-DATA

+

C131

10U/16

R159
68K

BR

AGND

BROUT

3816MUTE

C112
104

C113
104

AGND

AGND

R61
820K

AGND

C111

104

C110

104

AGND

DVD/DSP

AGND

AGND

Q6
C2120

Q5

A950

D6

7.5V

D7

7.5V

R173
1K

R174
1K

AGND

+

C78
47/25

+

C79
47/25

+

C80
47/25

+

C81
47/25

+7V

-7V

14.5V~

14.5V~

7.5V~

R171

6.8

R172

6.8

C145
333

C146
333

+

C132
100/16

+

C133
100/16

R148
150

R147
150

R149
150

R150
150

AGND

AGND

C58

104

C59

104

CE

C60

104

C61

104

DGND

AGND

-vv

15NC12

To enhance viewing, please print to A3 13