SONY CDX-M700 Service Manual

http://servis-manual.com/

SECTION 2

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.

2-1. FRONT PANEL ASSY (NORMAL)

1 Turn on the power and open the front panel.

3 screw (panel)

		stand
	4 front panel assy	2 screw (panel)
	(Take care not to	flexible board
	pull the flexible
	board excessively.)

2-2. FRONT PANEL ASSY (INOPERATIVE)

8Lift the motor block assy slightly to make a play.

5 PTT 2.6x6

6 PTT 2.6x6

3 PTT 2.6x6

4 PTT 2.6x6

2 screw (panel)

9

0 front panel assy

(Take care not to pull the flexible board excessively.)

flexible board

7 Lift the cam (R) assy slightly to make a play.

1 screw (panel)

22

2-3. CD MECHANISM BLOCK, FLEXIBLE BOARD

7 bracket (CD)

5 CD mechanism block

6 PTT 2.6x6

8 cover (flexible)

0 flexible board

3 PTT 2.6x4

9 CNP802

Note: When installing the flexible board,

make the board slack as illustrated.

2 PTT 2.6x4

1 PTT 2.6x6

4 CNP701

2-4. SUB PANEL (CD) SUB ASSY

1 CNP805

4 claw

3 PTT 2.6x6

5 claw

2 PTT 2.6 x6

6 sub panel (CD) sub assy

23

2-5. MOTOR BLOCK ASSY, CAM (R) ASSY

Note : Install the motor block assy and cam (R) assy in this roder.

For phase alignment between cams (L) and (R), see page 29 and 31.

1 PTT 2.6x6

4 PTT 2.6x6

5 motor block assy

Note: Install the cam (R) assy with the cam fully rotated in the direction of the arrow A.

A

2 cam (R) assy

3 CNP902

2-6. MAIN BOARD

	6 MAIN board	4 PTT 2.6x6
		ground point

5PTT 2.6x6 ground point

3 PTT 2.6x8

2 PTT 2.6x8

1 PTT 2.6x8

24

2-7. HEAT SINK

2-8. CHASSIS (T) SUB ASSY

2 P 2x3

1 Unsolder the

lead wires.

black

red

white

5 heat sink

4 PTT 2.6x8

3 PTT 2.6x8

2 PTT 2.6x12

1 PTT 2.6x8

3 P 2x3

4 chassis (T) sub assy

25

2-9. LEVER SECTION

4 claws

2-10. SERVO BOARD

6 PS 2x4

3 Removal the solders.

1 CN3

4 P 2x3

5 loading motor assy

5 guide (disc)

6 lever (R)

3 tension spring (LR)

7 lever (L)

1 special screw

2 DISC IN SW board

7 PS 2x4

2 CN2

8 SERVO board

26

2-11. SHAFT ROLLER ASSY

•When installing, take note of the positions arm (roller) and washers. (Fig. 1)

3 retaing ring (RA)

4 shaft retainer

shaft retainer	arm
retaing ring (RA) arm washer	washer	shaft retainer

Fig. 1

5 shaft roller assy

2 arm (roller)

1 tension spring (RA)

2-12. FLOATING BLOCK ASSY

6 floating block assy

7 compression spring (FL)

1 tension spring (KF1)

8 compression spring (FL)

4 Fit lever (D) in the direction of the arrow.

5 Turn loading ring in the direction of the arrow.

2 damper (T)

3 damper (T)

27

2-13. OPTICAL PICK-UP BLOCK

1 P 2x3

2 sled motor assy

3 optical pick-up block

28

SECTION 3

PHASE ALIGNMENT

3-1. ARM (A-L) ASSY, ARM (B-L) ASSY

4 arm (A-L) assy

5 stop ring 1.5, type-E

2 stop ring 1.5, type-E

1 arm (B-L) assy

3 spring (arm L)

bracket (L) assy

3-2. CAM (L)

1 Move the arm (B-L) assy in the direction of the arrow A and the arm (A-L) assy in the direction of the arrow B fully (full open state).

2Align the hole on the cam (L) with part C and install the cam.

4Turn the cam (L) clockwise and counterclockwise to verify that both the arms are operated.

A

arm (B-L) assy

3 stop ring 1.5, type-E

hole

cam (L)

C

arm (A-L) assy

B

29

3-3. MOTOR BLOCK

1Turn the cam (L) and position the cam so that part A does not touch the SWITCH board SW900.

3 PTT 2.6x6

4 PTT 2.6x6

2 motor block

SWITCH board

5 B 2.6x4

SW900

cam (L)

A

3-4. ALIGNMENT BETWEEN ARM (A-L) ASSY AND ARM (B-L) ASSY

1Input 9V DC to the motor terminal until the cam (L) stops rotating.

Take care to avoid overload of the motor.

2Verify that the arm (A-L) assy and arm (B-L) assy are positioned as shown below (full open).

motor

arm (B-L) assy

arm (A-L) assy

GND

DC 9V

+B

30

3-5. ARM (A-R) ASSY, ARM (B-R) ASSY

5 stop ring 1.5, type-E

4 arm (A-R) assy

2 stop ring 1.5, type-E

1 arm (B-R) assy		3 spring (arm R)

bracket (R) assy

3-6. CAM (R)

1Move the arm (B-R) assy in the direction of the arrow A and the arm (A-R) assy in the direction of the arrow B fully (full open state).

2 Align the hole on the cam (R) with part C and install the cam.

4Turn the cam (R) clockwise and counterclockwise to verify that both the arms are operated.

3 stop ring 1.5, type-E

hole

cam (R)

arm (B-R) assy

A

C

B

arm (A-R) assy

31

CDX-M700R/M750

4-2. BLOCK DIAGRAM — CD SECTION —

1

4

RF AMP, LD APC,

DIGITAL SERVO,

ATT

TO TUNER

OPTICAL PICK-UP

TO DISPLAY

CD SYSTEM CONTROL

SECTION

SYSTEM CONTROL

ERROR AMP

DIGITAL SIGNAL PROCESSOR

KSS-720A

IC1

IC501

SECTION

(Page 44)

IC5

(Page 43)

IC801 (1/3)

• Signal path

16M

A MUT

19

5

ATT

A

XTAI

86

:CD

A

5

OPEN

6

58 CD EJECTOR

BCK

81

BCK

CLOSE

7

59 CD OPENREQ

LRCK

77

LRCK

C

7

C

RF

RFO

16

61

RFAC

EFM

D/A

PCMD

79

DATA

MUTE

B

6

B

EQ

DEM

I/F

CONT

CD ON

Q411

54 RFDC

MD ON

I-V

BUS CLK

19 UNI CKO

D

8

D

51

CONV.

BUS SI

52

17

UNI SI

FOCUS

17

CDM ON

18 UNI SO

ERROR

DIGITAL

LOCK

18

CD ON

BUS ON

61

14 BUS ON

34

46

LOCK

RESET

30

6

SYS RST

CLV

FE

FE

BU IN

60

77 BU IN

14

50

E

11

E

TRACKING

TE

13

52

TE

SQSO

6

49

SI2

90 RSTX

SIRCS 24

F

10 F

ERROR

SUB

SQCK

S901

86 HSTX

7

48

SCK2

51 SE

CODE

SCOR

PD

PROCESS

24

64

SCOR

(RESET)

IC902

PD

4

LD

LD ON 22

MD2 73

71

MD2

1

RESET

2

BU 5V

XRST

11

21

CD RST

LD

AMP

HOLD SW 21

DATA

13

67

CD DATA

SW501

LD

LD

DRIVE

3

AGC CONT

20

XLAT

14

68

CD XLAT

(RESET)

Q101

SCLK

17

45

SCLK

TRACKING/FOCUS COIL DRIVE

CLOK

15

65

CD CKO

BATT (H)

SENS

16

57

SENS

CHECK

BATT

SLED/SPINDLE/LOADING MOTOR DRIVE

GFS

22

55

GFS

Q920

IC7

FOK

32

54

FOK

BUS INTERFACE

FOCUS

FFDR

31

XIN

IC802

FOCUS

10

22

42

COIL

FRDR

X1

COIL

BATT (L)

11

DRIVE

21

43

10

3

BATT

10MHz

CHECK

32 XOUT

TRACKING

8

TRACKING

25

40

TFDR

SERVO

COIL

TRDR

COIL

CTL

13

RESET

2

9

DRIVE

24

41

SW4

11

SSTP

M902

SFDR

(LIMIT)

Q804

6

SLED

31

38

SW1

D SW

10

BUS ON

SLED

MOTOR

SRDR

12

1

7

32

39

(DOWN)

CONT

MOTOR

DRIVE

SW3

62

IN SW

8

M901

SPINDLE

(DISC IN)

12

MDP

9

6

3

SPINDLE

MOTOR

18

35

SW2

63

SELF SW

DATA

13

6

5

2

MOTOR

DRIVE

(SELF)

8

4

1

M903

LOADING

CLK

7

5

1

69

LM EJ

11

4

CNP801

LOADING

MOTOR

MOTOR

4

DRIVE

2

66

LM LOD

BUS

40

SLED –

CONTROL IN

MUTE 1 34

70

DRIVE ON

MUTE 2 35

20

LD ON

22

HOLD

Q805

23

AGC CONT

53

BUS SO

SRST

Q806

Q801

2

BUS CLK

BUS SI

TO DISPLAY

BUS ON

BU CHECK

SECTION

UNI SO

LINK OFF

(Page 44)

SIRCS

04

42 42

CDX-M700R/M750

4-3. BLOCK DIAGRAM — TUNER SECTION —

PJ401

–1

L

(M750)

–2

BUS AUDIO IN

R-CH

R

ELECTRONIC VOLUME

IC401

IC402

1

SEL

OUT FL 30

7

12

–5

L

Q202

LINE OUT

3

–6

FRONT

FL

34

ACIFLR

PRE

R-CH

R

RL

33

AC INLR

AMP

TUNER UNIT

TO DISPLAY

SR

35

SWINR

–3

TU601

SECTION

ADL

24

OUTSSL

OUT RL 29

2

13

L

(Page 44)

Q201

LINE OUT

–4

REAR

ANT

MPX 10

R-CH

(ANTENNA)

1

13

MPX

R

AM IF 19

12

AM IF

2

ANT

AMDET

8

11

AM

(M700R)

15

MP IV

Q602

Q601

14

S METER

PJ402

20

SDA

21

SCL

–1

L

IC409

17

QUAL

SUB OUT (MONO)

–2

18

MUTE

SWR 25

R

MUTE

SYSTEM CONTROL

4

Q403

POWER AMP

CONTROL

MUTE

IC801 (2/3)

IC903

CNP901

Q604,606

TO CD

ATT

CONTROL

1

BUF

31

VOL ATT

SECTION

Q401, 402

5

FL+

32

TU ATT

FL

Q607

(Page 42)

(M750)

12

9

Q410

3

FL–

NOISE

9

2

RL+

5

FILT 1

Q605

50

QUALITY

RL

IC602

11

10

7

RL–

56

NS MASK

22 MUTE

RDS DECODER

ST-BY 55

4

STBY

IC601

TEL ATT 16

4

FR+

RDS

9

16 FM DET

RDS

9

ILL IN 95

12

4

XO

SCL 10

ACC IN 81

Q923

R-CH

3

FR–

ILL

RR+

X601

X1A 73

11 RR–

4.3MHz

XI

MPTH

2

52

MPTH

X802

ACC

DET

5

X0A 74

32kHz

DET

Q902

13

ATT

20 S METER

DAVN

8

75

DAVN

Q918

14

(M700R)

ILL

7

ACC

S METER 14

53

VSM

TEST 84

15

Q917

TEST

SDA IC 12

70

I2CSIO

PW ON 83

SCL IC 13

71

I2CCKO

X0 92

5

FM AGC

4

51

FM AGC

X801

POWER

POWER

BATT

AMP REM

SDA ROM 17

10

E2PSIO

3.68MHz MD +B

CONT

COM 8V

CONT

6

X1 93

ANT REM

SCL ROM 18

11

E2PCKO

Q905, 919

Q461

Q901

TU ON 114

• Signal path

POWER

F901

16 BATT

: FM

MD +B

CONT

TU 8V

BATT

04

Q924, 925

: AM/MW

43 43

CDX-M700R/M750

4-4. BLOCK DIAGRAM — DISPLAY SECTION —

DISPLAY CONTROL

IC301

BUS SI

98

UNI SI

SB-SI 61

UNI SO

97

UNI SO

DSP CLK 63

BUS CLK

101

UNI SCK

2

BUS ON

38

BUS ON

BU CHECK

49

BU IN

TO CD

82

NMI

SECTION

EMPH

(Page 42)

S RST

6

BUF

7

81

RES

IC303

LINK OFF 50 LINK OFF

SIRCS

IR

RECEIVE 2

IC501

IR

RECEIVE 1

IC903

LCD902

LCD DRIVER

IC901

INH CLK DATA CEO DIMMER 97 99 100 98 86

LCD901

	97 99 100 98
	INH	CLK DATA CEO
LCD DRIVER	SW1	SW2 84
IC902	85

85XTAL

86EXTAL

X351

18.43MHz

		BOOT 57
		LED SW2 47
		LED SW1 46
		SP LAT 33
66	CEO	RX 62
69	INH	TX/FL-SO 60
64	CLK
70	CEI	ILL ON 52

POWER

MD +B CONT. LCD9V

Q907,908

LCD 9V

POWER

Q906

Q905

POWER

LCD9V

CONT.

CONT.

Q901,902

Q903,904

CN502

ILL ON 9V	LCD 9V
TX (SO)
RX (SI)
FL SW
04

SYSTEM CONTROL

DSP

IC801 (3/3)

IC302

AD ON

AD ON

IC405

BU 5V

CONT.

SO 26

63 RVDT

DAILO 27

FL

Q807

SI 25

61 TRDT

CKO 27

59 SCK

DA3RO 54

R-CH(FR)

IC405

RST 36

57 DSP RST

DSP

LAT 35

62 XLAT

DA1RO 29

RL

KEY

BU 5V

79 KEY ACK

READY 78

60 REDY

ACTIVE

DA3LO 52

R-CH(RR)

Q921

DSPMST 29

77 MST/SLV

IC406

LATCH

DA2RO 43

SR

IC304

72 RC IN1

CNP803

ADL IN 35

ADL

(REMOTE IN)

48 RC IN0

DATA

9

8

71 DATA

ADR IN 46

R-CH

KEY IN

46 KEY IN0

LRCK

2

3

76 LRCK

MATRIX

47 KEY IN1

SW504

1

BCK

5

6

75 BCK

MCK0 40

Z

X302

TO CD

MCK1 41

16MHz

SECTION

106 BOOT

AND

116 LED SW2

(Page

16M

4

2

58 MCKO

IC352

115 LED SW1

42)

1

4 SP LATCH

12 FLS SI

CD ON

13 FLS SO

MD ON

POWER

BATT

1

REG

2

BU 5V

CONT.

IC905

82 FLSWPWON

Q913, 915

BATT

1

REG

3

MT +B

CDON IN 76

IC306

DSP ON 108

REG

BATT

CD 5V

2

Q914

M601

POWER

OPEN/CLOSE

MD 5V

DSP 5V

CONT.

MOTOR

Q912, 916

3

MOTOR

11

98 MOT+

MD2 89

3.3V

3.3V

14

DRIVE

IC307

6

97 MOT–

MD1 88

1

REG

2

BU 5V

4

REG

6

D 3.3V

16

IC904

IC305

12

VREF

3.3V

A 3.3V

MT +B

BEEP

REG

CONT.

• Signal path

BEEP 15

DRIVE

BZ801

Q301

Q303,304

Q803

: FM

40 FPCRTL

POWER

BATT

: CD

I

I

DC/DC CONV.

CONT.

3

DET

7

DET

96 I DET

Q903, 904

IC308

Q302

CONTROL

IC901

9

SW900

OPEN

100 OPEN SW

VCC

OUT1 7

ON/OFF

MD 5V

DRIVE

(OPEN/CLOSE)

CLOSE

99 CLOSE SW

Q906

INA1 3

LED

SHIFT

SHIFT 37

2

RT

ON/OFF

DRIVE

Q909

OUT2 10

MD +B

DRIVE

Q501,502

Q911

69 FLASH W

INA2 14

3

TO TUNER SECTION

(Page 43)

44 44

4-5. CIRCUIT BOARDS LOCATION

	DISC IN SW board	LIMIT SW board
SWITCH board		SERVO board

tuner unit (TU601)

MAIN board

DISPLAY board

SUB board

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.

(In addition to this, the necessary note is printed in each block.)

for schematic diagram:

•All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

•All resistors are in Ω and 1/4 W or less unless otherwise specified.

•% : indicates tolerance.

•f : internal component.

•C: panel designation.

Note: The components identified by mark 0or dotted line with mark 0are critical for safety.

Replace only with part number specified.

•U : B+ Line.

•Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords.

•Voltages are taken with a VOM (Input impedance 10 MΩ ).

Voltage variations may be noted due to normal production tolerances.

•Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production tolerances.

•Circled numbers refer to waveforms.

•Signal path.

F : FM

f : AM/MW

J : CD

for printed wiring boards:

•X: parts extracted from the component side.

•Y: parts extracted from the conductor side.

•a : Through hole.

•b: Pattern from the side which enables seeing. (The other layer’s patterns are not indicated.)

Caution:

Pattern face side: Parts on the pattern face side seen from the (Side B) pattern face are indicated.

Parts face side: Parts on the parts face side seen from the

(Side A) parts face are indicated.

• Waveforms		(MODE:PLAY)
1
		0V
Approx. 200mVp-p
IC1	qd (TE)
2
		0V
Approx. 620mVp-p
IC1	qf (FE)
3
		1.2Vp-p
IC1 qh (RFO)
4
		5Vp-p
22.7µsec
IC501 uj (LRCK)
5
		5Vp-p
	474nsec
IC501 ul (PCMO)
6
		5.7Vp-p
		474nsec
IC501 ia (BCK)
7
		3.8Vp-p
16.89MHz
IC501	ih (XTAI)
8
		2Vp-p
	10MHz
IC5	ea (X IN)

45 45

CDX-M700R/M750

• Refer to page 45 for Waveforms.

4-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (1/2) — • Refer to page 60 for IC Block Diagrams.

Note:

•Voltage and waveforms are dc with respect to ground

under no-signal conditions.

no mark : CD PLAY

(Page 49)

: Impossible to measure

(Page 49)

(Page 52)

48 48

CDX-M700R/M750

• Refer to page 45 for Waveforms.

4-8. SCHEMATIC DIAGRAM — CD MECHANISM SECTION (2/2) — • Refer to page 60 for IC Block Diagrams.

(Page 48)

(Page 48)

Note:

• Voltage and waveforms are dc with respect to ground under no-signal conditions.

no mark : CD PLAY

: Impossible to measure

49 49

CDX-M700R/M750

Ver 1.3 2001. 05

4-10. SCHEMATIC DIAGRAM — MAIN SECTION (1/4) — • Refer to page 60 for IC Block Diagrams.

D411, 412

CRZ22 (M700R)

CRS02 (M750)

(Page 48)

(Page 54)

Note:

•Voltage is dc with respect to ground under no-signal (detuned) condition.

no mark : FM

< > : CD PLAY

(Page 53)

(Page 55)

52 52