Sony CDX-M700R, CDX-M750 Cirquit Diagram

CDX-M700R/M750

SERVICE MANUAL

Ver 1.2 2001. 03

Photo: CDX-M750

• The tuner and CD sections have no adjustments.

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS (CDX-M750)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION 19 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more than 1% total harmonic distortion.

Other Specifications CD player section

System Compact disc digital audio

Signal-to-noise ratio 90 dB Frequency response 10 – 20,000 Hz Wow and flutter Below measurable limit Laser Diode Properties (CDX-M750)

Material GaAlAs Wavelength 780 nm Emission Duration Continuous Laser output power Less than 44.6 µW*

* This output is the value measured at a distance

of 200 mm from the objective lens surface on the Optical Pick-up Block.

Tuner section

FM

Tuning range 87.5 – 107.9 MHz (CDX-M750)

Antenna terminal External antenna connector Intermediate frequency 10.7 MHz/450 kHz Usable sensitivity 8 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 66 dB (stereo),

Harmonic distortion at 1 kHz

Separation 35 dB at 1 kHz Frequency response 30 – 15,000 Hz

AM (CDX-M750)

Tuning range 530 – 1,710 kHz Antenna terminal External antenna connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity 30 µV

system

87.5 – 108.0 MHz (CDX-M700R)

72 dB (mono)

0.6% (stereo),

0.3% (mono)

FM/MW/LW COMPACT DISC PLAYER

US Model

Canadian Model

CDX-M750

AEP Model

UK Model

CDX-M700R

Model Name Using Similar Mechanism NEW CD Drive Mechanism Type MG-383V-121//K Optical Pick-up Name KSS-720A

MW/LW (CDX-M700R)

Tuning range MW: 531 – 1,602 kHz

LW: 153 – 279 kHz Aerial terminal External aerial connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity MW: 30 µV

LW: 40 µV

Power amplifier section

Outputs Speaker outputs Speaker impedance 4 – 8 ohms Maximum power output 50 W × 4 (at 4 ohms)

General

Outputs Audio outputs (3)

Power antenna relay

control lead (CDX-M750)

Power aerial relay

control lead (CDX-M700R)

Power amplifier control

lead Inputs Telephone ATT control

lead

Illumination control lead Power requirements 12 V DC car battery

(negative ground)

– Continued on next page –

FM/AM COMPACT DISC PLAYER

CDX-M750

CDX-M700R

9-870-134-12

Sony Corporation

Audio Entertainment Group General Engineering Dept.

1

CDX-M700R/M750

4-2. BLOCK DIAGRAM — CD SECTION —

OPTICAL PICK-UP

KSS-720A

A

C B

D

E F

PD

LD

FOCUS

COIL

TRACKING

COIL

I-V

CONV.

M902

SLED

MOTOR

M901

SPINDLE

MOTOR

M903

LOADING

MOTOR

A

5

C

7

B

6

D

8

FOCUS ERROR

E

11

TRACKING

F

ERROR

10

PD

4

LD

DRIVE

Q101

TRACKING/FOCUS COIL DRIVE

SLED/SPINDLE/LOADING MOTOR DRIVE

10

11

12 13

AMP

LD

3

IC7

FOCUS

COIL

DRIVE

TRACKING

8

COIL

DRIVE

9

SLED

6

MOTOR

7

DRIVE

SPINDLE

MOTOR

DRIVE

LOADING

5

MOTOR

4

DRIVE

RF AMP, LD APC,

ERROR AMP

IC1

22

21

25

24

31 32

18

1 2

MUTE 1

34

MUTE 2

35

RFO RFAC

RF EQ

FE

TE

LD ON

HOLD SW

AGC CONT

16

14

13

22 21 20

4

DIGITAL SERVO,

DIGITAL SIGNAL PROCESSOR

IC501

XTAI

86

BCK

81

LRCK

77

SUB

CODE

PCMD

LOCK

SQSO SQCK SCOR

XRST DATA XLAT SCLK CLOK SENS

MD2

GFS FOK

79

34

24

73 11 13 14 17 15 16 22 32

RFDC

FE

TE

SE

FFDR

FRDR

TFDR

TRDR

SFDR SRDR

MDP

EFM DEM

SERVO

CTL

61

54

50

52

51

42

43

40

41

38 39

35

D/A

I/F

DIGITAL

CLV

PROCESS

TO DISPLAY

SECTION

6 7

SW4

(LIMIT)

SW1

(DOWN)

SW3

(DISC IN)

SW2

(SELF)

1

16M BCK

LRCK

DATA CD ON MD ON

(Page 44)

X1

10MHz

CD SYSTEM CONTROL

IC5

A MUT

OPEN

CLOSE

BUS CLK

BUS SI

CDM ON

17

CD ON

18

BUS ON

LOCK

SI2 SCK2 SCOR

MD2 CD RST CD DATA CD XLAT SCLK CD CKO SENS GFS FOK

XIN

XOUT

SSTP

D SW

IN SW

SELF SW

LM EJ LM LOD SLED – DRIVE ON LD ON HOLD AGC CONT

RESET

BU IN

BUS SO

46

49 48 64

71 21 67 68 45 65 57 55 54

31

32

11

10

62

63

69 66 40 70 20 22 23

19

6 7

51 52

61 30 60

53

ATT

TO TUNER

SECTION

(Page 43)

MUTE CONT

Q411

(RESET)

S901

(RESET)

Q805

SW501

10 3

13 2

12

9

8

11

SYSTEM CONTROL

IC801 (1/3)

ATT

5

CD EJECTOR

58

CD OPENREQ

59

UNI CKO

19

UNI SI

17

UNI SO

18

BUS ON

14

SYS RST

6

BU IN

77

SIRCS

RSTX

90

HSTX

86

IC902

1 2

RESET

BATT (H)

CHECK

Q920

BUS INTERFACE

IC802

BATT (L)

CHECK

RESET

BUS ON

CONT

DATA

CLK

• Signal path

:CD

24

BU 5V

BATT

Q804

1

8

6

4

3

5

2

4

1

7

CNP801

BUS

CONTROL IN

SRST

BUS CLK

2

TO DISPLAY

SECTION

04

(Page 44)

BUS SI

BUS ON

BU CHECK

UNI SO

LINK OFF

SIRCS

Q806

Q801

4242

4-3. BLOCK DIAGRAM — TUNER SECTION —

TUNER UNIT

TU601

ANT MPX

(ANTENNA)

04

1 10

ANT

2

AM IF

AMDET

RDS

S METER VSM

SDA IC SCL IC

FM AGC SDA ROM SCL ROM

19

14 12 13

17 18

8

9

(M700R)

4

BUF

Q607

X601

4.3MHz

• Signal path

: FM

: AM/MW

Q602 Q601

MUTE CONTROL Q604,606

NOISE

FILT

IC602

RDS DECODER

IC601

16

FM DET

4

XO

5

XI

20

S METER

TO DISPLAY

SECTION

(Page 44)

15

Q605

RDS

SCL

MPTH DAVN

CDX-M700R/M750

PJ401

–1

L

BUS AUDIO IN

PJ402

CNP901

–2

–5

–6

–3

–4

–1

–2

1

9

2

10

4 12 3 11

13 14 7 15

5 6

16

FL+

FL–

RL+

RL–

FR+ FR– RR+ RR–

ATT ILL ACC TEST

AMP REM ANT REM

BATT

R

L

LINE OUT

FRONT

R

L

LINE OUT

REAR

R

L

SUB OUT (MONO)

R

MD +B

(M750)

7

2

(M700R)

ATT

IC402

PRE

AMP

ACC DET

Q918

Q905, 919

Q924, 925

12

13

Q410

POWER

CONT

POWER

CONT

MUTE CONTROL Q401, 402

ILL

DET

Q902

COM 8V

TU 8V

Q923

Q202

Q201

Q403

BATT

FL

RL

POWER AMP

12

11

22

MUTE

4

STBY

Q917

Q901

IC903

ELECTRONIC VOLUME

IC401

1 30

SEL OUT FL

3

9

10

2 8

FL RL SR

ADL

(M750)

34

ACIFLR

33

AC INLR

35

SWINR

24

OUTSSL

13

MPX

12

AM IF

11

AM

15

MP IV

14

S METER

20

SDA

21

SCL

17

QUAL

18

MUTE

SYSTEM CONTROL

IC801 (2/3)

31

VOL ATT

32

TU ATT

50

QUALITY

56

NS MASK

52

MPTH

75

DAVN

53

I2CSIO

70

I2CCKO

71

FM AGC

51

E2PSIO

10

E2PCKO

11

OUT RL

SWR

ST-BY

TEL ATT

ILL IN

ACC IN

X1A

X0A

TEST

PW ON

TU ON

29

IC409

25

4

TO CD

SECTION

(Page 42)

55

16 95 81 73

X802

32kHz

74

84

83 92

X0

X1

114

X801

3.68MHz

93

BATT

POWER

CONT Q461

R-CH

5

3

9

7

R-CH

F901

43 43

CDX-M700R/M750

4-4. BLOCK DIAGRAM — DISPLAY SECTION —

ILL ON 9V

TX (SO)

RX (SI)

FL SW

04

SECTION

(Page 42)

CN502

2

TO CD

LCD902

LCD901

LCD DRIVER

LCD 9V

IC902

LCD 9V

BUS SI

UNI SO

BUS CLK

BUS ON

BU CHECK

EMPH

S RST

LINK OFF

SIRCS

SW1

85

POWER

CONT.

Q901,902

6

IR

RECEIVE

IC501

IR

RECEIVE

IC903

LCD DRIVER

IC901

INH

CLK

DATA

100

9997 98

100

9997 98

INH

CLK

DATA

SW2

98 61

97

101 38 49 82

BUF

7

2

1

18.43MHz

X351

MD +B

81

50

85

86

66 69 64 70 52

IC303

DIMMER

CEO

86

CEO

84

Q906 Q905

DISPLAY CONTROL

IC301

DSP CLK

LED SW2 LED SW1

SP LAT

TX/FL-SO

ILL ON

POWER

CONT.

Q907,908

SB-SI

BOOT

POWER

Q903,904

UNI SI

UNI SO

UNI SCK BUS ON BU IN NMI

RES

LINK OFF

XTAL

EXTAL

CEO INH CLK CEI

RX

CONT.

63

57 47 46 33 62 60

LCD9V

BU 5V

CNP803

(REMOTE IN)

BATT

M601

OPEN/CLOSE

MOTOR

3 7

Q501,502

1 3

3 14 16

I

DET

IC308

SW900

(OPEN/CLOSE)

LED

DRIVE

AD ON

CONT.

Q807

KEY

ACTIVE

Q921

KEY IN

MATRIX

REG

IC306

2

MOTOR

DRIVE IC307

12

11

6

VREF

CONT.

Q303,304

DET

Q302

OPEN

CLOSE

AD ON

SW504

Z

MT +B

I

MT +B

SYSTEM CONTROL

79

KEY ACK

72

RC IN1

48

RC IN0

46

KEY IN0

47

KEY IN1

106

BOOT

116

LED SW2

115

LED SW1

4

SP LATCH

12

FLS SI

13

FLS SO

82

FLSWPWON

MOT+

98

MOT–

97

FPCRTL

40

I DET

96

OPEN SW

100

CLOSE SW

99

FLASH W

69

IC801 (3/3)

DSP

26

SO

25

SI

27

CKO

36

RST

35

LAT

78

READY

29

DSPMST

1

TO CD

SECTION

(Page

42)

76

CDON IN

108

DSP ON

89

MD2

88 1 2

MD1

15

BEEP

37

SHIFT

BEEP

DRIVE

Q803

SHIFT

Q909

DATA

LRCK

BCK

16M

CD ON

MD ON

MD 5V

LATCH

POWER

Q912, 916

3.3V REG

IC904

DC/DC CONV.

CONTROL

IC901

2

IC304

9 8

2 3

5 6

AND

4

IC352

1

CONT.

BU 5V

BZ801

POWER

CONT.

Q903, 904

9

VCC

RT

2

OUT1

INA1

OUT2

INA2

POWER

CONT.

Q913, 915

BATT

7

3

10

14

63

RVDT

61

TRDT

59

SCK

57

DSP RST

62

XLAT

60

REDY

77

MST/SLV

71

DATA

76

LRCK

75

BCK

58

MCKO

4 6

IC305

BATT

ON/OFF

DRIVE

ON/OFF

DRIVE

REG

Q914

3.3V REG

Q301

Q906

Q911

DSP

IC302

DAILO

DA3RO

DA1RO

DA3LO

DA2RO

ADL IN

ADR IN

MCK0

MCK1

BATT

27

54

29

52

43

35

46

40

41

CD 5V

DSP 5V

D 3.3V

A 3.3V

MD 5V

MD +B

R-CH(FR)

R-CH(RR)

R-CH

X302

16MHz

REG

1 2

IC905

• Signal path

: FM

: CD

IC405

IC406

BU 5V

FL

RL

SR

ADL

3

TO TUNER

SECTION

(Page 43)

4444