Sony DEJ-760, DEJ-761, DEJ-765, DEJ-768-CK Service manual

D-EJ760/EJ761/EJ765/EJ768CK

SERVICE MANUAL

Ver 1.0 2002.12

Photo : D-EJ760

AEP Model

D-EJ760/EJ761/EJ765

UK Model

D-EJ761

E Model

D-EJ761

Australian Model

D-EJ761/EJ768CK

Model Name Using Similar Mechanism NEW

CD Mechanism Type CDM-3325ER

Optical Pick-up Type DAX-25E

SPECIFICATIONS

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs Wavelength: λ = 780 nm Emission duration: Continuous Laser output: 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 with 7 mm aperture.)

Power requirements

For the area code of the model you purchased, check the upper left side of the bar code on the package.

• Sony NH-WM2AA rechargeable batteries: 2.4 V DC

• Two LR6 (size AA) batteries: 3 V DC

• AC power adaptor (DC IN 4.5 V jack): UK model: 230 V, 50 Hz AUS model: 240 V, 50 Hz AEP, E, EE models: 100 - 240 V, 50/60 Hz

Dimensions (w/h/d) (without projecting parts and controls)

Approx. 136.0 × 27.6 × 136.0 mm (5 3⁄8 × 1 1⁄8 × 5 3⁄8 in.)

Mass (excluding accessories)

Approx. 170 g (6.0 oz)

Operating temperature

5°C - 35°C (41°F - 95°F) Design and specifications are subject to change without notice.

Supplied Accessories

D-EJ760: Headphones/earphones (1) D-EJ761: AC power adaptor (1)

Headphones/earphones (1)

D-EJ765: AC power adaptor (1)

Headphones/earphones with remote control (1) Rechargeable batteries (2) Battery carrying case (1)

D-EJ768CK:

AC power adaptor (1) Headphones/earphones (1) Car connecting pack (1)

Car battery cord (1)

Rotary commander (1) Velcro tape for the CD player (2) Velcro tape for the rotary commander (1)

PORTABLE CD PLAYER

9-874-268-01

2002L0200-1

Sony Corporation

Personal Audio Company

Pubulished by Sony Engineering Corporation

D-EJ760/EJ761/EJ765/EJ768CK

TABLE OF CONTENTS

• Abbreviation AUS : Australian EE : East European

DANGER

Invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270°C during

repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Specifications ............................................................................ 1

1. SERVICING NOTES ................................................... 3

2. GENERAL

Locating the Controls ......................................................... 3

3. DISASSEMBLY

3-1. Cabinet (Upper) ASSY, Cabinet (Middle) ASSY ....... 4

3-2. MD ASSY, Main Board .............................................. 5

3-3. “Motor ASSY (Sled) (M902)”,

Optical Pick-up (DAX-25E),

“Motor ASSY, Turn Table (Spindle) (M901)” ............ 5

4. ELECTRICAL ADJUSTMENS ............................... 6

5. DIAGRAMS

5-1. Block Diagram ............................................................ 7

5-2. Schematic Diagram –MAIN SECTION (1/3)– ......... 8

5-3. Schematic Diagram –MAIN SECTION (2/3)– ......... 9

5-4. Schematic Diagram –MAIN SECTION (3/3)– ....... 10

5-5. Printed Wiring Boards ...............................................11

5-6. IC Pin Function Description ..................................... 13

6. EXPLODED VIEWS

6-1. Upper Lid Section ..................................................... 18

6-2. Cabinet Section ......................................................... 19

6-3. Optical pick-up Section (CDM-3325ER) ................. 20

7. ELECTRICAL PARTS LIST ................................... 21

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PA RTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PA RT NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

2

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30cm away from the objective lens.

Before Replacing the Optical pick-up Block

Please be sure to check thoroughly the parameters as per the “Optical pick-up Block Checking Procedure” (Part No. : 9-960-027-11) issued separately before replacing the optical Pick-up block. Note and specifications required to check are given below.

• FOK output : IC601 yg pin

When checking FOK, remove the lead wire to disc motor.

• RF signal P-to-P value : 0.4 to 0.8Vp-p

D-EJ760/EJ761/EJ765/EJ768CK

Laser Diode Checking Methods

During normal operation of the equipment, emission of the laser diode is prohibited unless the upper panel is closed while turning ON the S801 (push switch type). The following two checking methods for the laser diode are operable.

Method : Emission of the laser diode is visually checked.

1. Open the upper lid.

2. Push the S801 as shown in Fig. 1 .

3. Check the object lens for confirming normal emission of the laser diode. If not emitting, there is a trouble in the automatic power control circuit or the optical pick-up. During normal operation, the laser diode is turned ON about 2.5 seconds for focus searching.

S801

LOCATING THE CONTROLS

CD player (front)

1 SOUND

2 P MODE/

34 Jog lever (u (play/

pause)•./> (AMS/ search))

5 CHARGE/x

6 VOL +*/–

Display

i (headphones) jack

*The button has a tactile dot.

SECTION 2

GENERAL

Fig.1 Method to push S801

This section is extracted from instruction manual.

Strap holes

OPEN

DC IN 4.5 V (external power input) jack

LINE OUT jack

7 HOLD

CD player (inside)

89 G-PROTECTION

BATTERY COMPARTMENT

3

D-EJ760/EJ761/EJ765/EJ768CK

Y

DISASSEMBLY

z

The equipment can be removed using the following procedure.

SECTION 3

MD ASSY “Motor ASSY, turn table (spindle) (M901)”, Optical pick-up (DAX-25E),

“Motor ASSY (Sled) (M902)”

Set

Cabinet (upper) ASSY, Cabinet (middle) ASSY

Main board

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

3-1. CABINET (UPPER) ASSY, CABINET (MIDDLE) ASSY

4 To w

screws (B2)

3 Five

screws (B2)

Cabinet (middle) ASSY

1

Cabinet (upper) ASS

2

7 CN801

5

Claw

5

Claw

5

Claw

6

Cabinet (lower) ASSY

4

3-2. MD ASSY, MAIN BOARD

Y

p

1 CN501

D-EJ760/EJ761/EJ765/EJ768CK

MD ASSY

2 CN502

3 CN503

4

Main board

5

Cabinet (lower) ASS

3-3. “MOTOR ASSY (SLED) (M902)”, OPTICAL PICK-UP (DAX-25E), “MOTOR ASSY, TURN TABLE (SPINDLE) (M901)”

1 Three screws (B1.7x4)

2

Cover, Gear

5 Three screws (B1.7x4)

Motor ASSY (Sled) (M902)

3

Motor ASSY, Turn table (Spindle) (M901)

4

Optical pick-u (DAX-25E)

6

Chassis

5

D-EJ760/EJ761/EJ765/EJ768CK

)

D4

01

IC601

C627

C626

C611

C616

L606

R632

C602

C631

R627

C620

R601

C630

R624

R623

R622

C619

R621

C618

R620

C617

R625

C634

C633

C603

C632

C613

R635

C635

R636

C609

R619

C601

TP630 (RF)

60

61

90

91

SECTION 4

ELECTRICAL ADJUSTMENTS

The CD section adjustments are done automatically in this set.

Precautions for Check

1. Perform check in the order given.

2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated.

3. Power supply voltage requirement : DC4.5 V in DC IN jack.

(J401) VOLUME button : Minimum HOLD switch : OFF

Focus bias Check

Condition:

• Hold the set in horizontal state.

Connection:

oscilloscope

(AC range)

TP630(RF)

[MAIN BOARD] (SIDE A)

Procedure:

1. Connect the oscilloscope to the test point TP630(RF) on the MAIN board.

2. Set a disc. (YEDS-18)

3. Press the u button.

4. Check the oscilloscope waveform is as shown below. A good eye pattern means that the diamond shape (◊) in the center of the waveform can be clearly distinguished.

RF Signal reference Waveform (Eye Pattern)

VOLT/DIV : 100 mV (With the 10 : 1 probe in use TIME/DIV : 500ns

RF level

0.4 to 0.8 Vp-p

To watch the eye pattern, set the oscilloscope to AC range and increase the vertical sensitivity of the oscilloscope for easy watch-ing.

5. Stop revolving of the disc motor by pressing the x button.

6

5-1. BLOCK DIAGRAM

OPTICAL PICK-UP

BLOCK

(DAX-25E)

OP IC

FOCUS

COIL

TRACKING

COIL

M902 SLED

MOTOR

M901

SPINDLE

MOTOR

VCC

RF

OPGSW

OPSTB

LD

PD

M

A A E F

VCC2_2.0V

LD

DRIVER

Q420

VCC1_2.2V

F+

F-

T+

T-

S+

S-

W

V

U

+VBAT

L430

84

92 91 89 90 88

22

23

48

46

44

42

52

50

80

53 49 45 41

6

4

2

1

RFAC

A B E

F RFDC

SEO

SEM

FO2

RO2

FO3

RO3

FO1

RO1

W

U

V

COMCOM

VM1 VM12 VM23 VM3

SPVCC

RF

AMP

A/D

CH2

H

BRIDGE

CH3

H

BRIDGE

CH1

H

BRIDGE

CH4

H

BRIDGE

FOCUS/TRACKING COIL DRIVE SLED/SPINDLE MOTOR DRIVE

DEMODULATOR

APC

LEVEL

SHIFTER

LEVEL

SHIFTER

IC401 (1/2)

SECTION 5

DIAGRAMS

IC603

D0-3 A0-9

1,2,24,25 5,9-12,14-18

4,3,6,5 113-116,11-13,15-17

D0-D3

EFM

SERVO

PWM

FFDR

FRDR

TFDR

TRDR

SFDR

SRDR

TRDR

SFDR

FFDR FRDR MDS

TFDR TRDR

SFDR SRDR

SYNC

SRDR

MDS

96 95 98 97 100 99 102 103 104 222120324748

FFDR

TFDR

FRDR

SEP

24

FI2

58

RI2

57

BRK

70

PWM

72 4

FI3

60

RI3

59

FI1

56

RI1

55

34

SYNC

74

FG

LATCH

40

DATA

CLOCK

WAKEUP

RSTOUT

XRST

39 38 37

35

36

I/F

RAM(4M)

A0-A9

SUB CODE

PROCESSOR

MDP

C176

MDP

SYNC

SYNC MDP

COMPARATOR

DEFFERENTIAL

Q402

IC403

XRAS

XCAS

4 23 3

1 9 2

XCAS

XRAS

CLOCK

OSC

XTAO

X601

16.9MHz

3 1

XWE

XTAI

R4M

IC601

RF AMP,SERVO

DIGITAL SIGNAL PROCESSOR

D-RAM CONTROLLER

D/A CONVERTER

SIO

CLOCK_I

SDTO_I

SENS_O

78 77

70

72

75 16 17 18 66

D805

79

XIN

2

HG_GUP_O HG_XSTB_O

AGCPWM_O

FG_I/FGSE_I

XPOWLT_O MSDTI_I MSDTO_O MSCK_O XWAKE_O

8

RESET

XRST_O

XRST_I

SCOR_O

WDCK_O

SYSM_I

SCOR_I

XRST_O

42-56 57-60

SEG0

I

SEG14

LIQUID

CRYSTAL

DISPLAY

SWITCH UNIT

AMUTE_O

GRSCOR_I

COM0

XSOE_I

XLAT_I

XLAT_O

XSOE_O

I

COM3

DAC

65232425262728

LPF

FOK

FOK_I

AOUT1

51

AOUT2

56

MUTE DRIVE

Q302

HPL LOUT

43

HPR

LRMU

61

19

VDD0

|

72

105

50

57

P_SEL

P_SDTI

676873699151413121179

PGMSI_I

PGSEL_O

VCC3_2.65V

VCC2_2.0V

P_SDTO

TEST

PGMSO_O

VDD2

AVDD1

AVDD2

FLASH ROM

PROGRAM

RESET2

CLK4M2

CN901

P_SCK

PGMSCK_O

MUTE

Q301

LIN

8

RIN

9

MUTE

13

IC301

HEADPHONE AMP

PWRSW

BEEP

1114

3074 24

264

BEEP_O

AD_SEL

XPWRSW_O

IC801

SYSTEM

CONTROL

MICON

AD_KEY

AD_KEY2

2523 28 40

KEY MATRIX S406 S404 S407 S405

CLOSE

S801

(OPEN/CLOSE)

HOLD_I

S803

.

HOLD

ON OFF

+V BAT

31

TSB_I/O

(EEPROM)

AD_RMKEY

AD_CHGMNT

AD_BATMNT

AD_DCINMNT

ESP_I

38

19

G.PROTECTION

ON OFF

6

ROUT

444

VCC

3

VCC3_2.65V

VCC2_2.0V

VCC1_2.2V

VCPU_2.0V

VDD1

5

VDD2

32

21

22 66

Q403

27

VCPU_AD

VREF_AD

20

VCPU_2.0V

S802

VCPU_2.0V

D-EJ760/EJ761/EJ765/EJ768CK

J301 LINE

OUT

J302

i

IC401 (2/2)

POWER CONTROL

11

VCC3

VCC2

18

17

VCC1

19

VCPU

CHGMNT_O

67

VMMNT_O

DCIN

61

REGB

62

DET(0.29V)

63

CHGB

65

+VBAT

SWITCH

Q401, 405

• SIGNAL PATH

BATM1_I BATM2_I

D400

: CD PLAY

VCC0_I

VCC0_O

STNG

VIN

Q412

20

16

Q404

25

VDR409

L401

DRY BATTERY

SIZE "AA"

(IEC DESIGNATION LR6)

2PCS, 3V

RECHARGEABLE BATTERY

OR

NC-WMAA/NH-WM2AA

2.4V

J401

DC IN 4.5V

LG

8

12 68 69

!

77

D-EJ760/EJ761/EJ765/EJ768CK

5-2. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) – • Refer to page 12 for Notes. • Refer to page 13 for IC Pin Function Description.

M902

TRACKING

COIL

TP630

RF

E F

B

A

C502

4.7

M901

R637

22k

R639

22k

R632

R631

22k

Q301

XP4501

<M>

C202

1000p

C110

2.2

C357

22

6.3V

IC603

4M DRAM

MUTE

C102

1000p

C358

2200p

R353

C354

100

6.3V

R205

R105

1k

L201

4.7µH

L101

L301

4.7µH

D302

MM3Z5VT1

D305

C816

MM3Z5VT1

100p

Q302

XP4312

<M> MUTE DRIVE

R360

0

C360

1000p

R111

C111

470

220

4V

C211

220

4V

R211

470

C361

1000p

R361

0

4.7

L303

0

4.7µH

EJ761:AUS,E/EJ768CK

R823

*R823 47k

EJ760/EJ761:AEP,EE,UK/EJ765

100k

EJ761:AUS,E/EJ768CK

L310

4.7µH

L110

4.7µH

L210

4.7µH

CN502

4P

1

4

1

2

CN501

15P

15

10

FOCUS

COIL

C617

4700p

C618

0.47

R621

C601

C602

47

0.1

4V

(RF)

C631

47k

22p

R633

R635

22k

AVDD

5

1

C616

1M

C619

R634 100k

C634 470p

R1

0

CN503

WHITE

<SLED>

0.1

R620

0.47

R624

C620

R627

W

V

U

2P

0

OPGSW

OPSTB

R618

10k

R622

C632 470p

S+

LD PD

T+

470k

100p

C630

2200p

COM

C606

0.1

L603

C101

R613

2.2k

C625

6.3V

C201

4.7

10

R609 R608

R607 R606

C609

4.7

C605

0.47

XCAS

XWE

XRAS

A4 A5 A6

A7 A8 A9

D2 D3 D0 D1

W

V U

C612

R615

22

6.3V

0

S-

A B

RF

E

F F+ T-

F-

2.2k

220k

R623

R601

C633 470p

C635 470p

FOK

2.2k

R619

10k

R636 100k

C615

0.1

47k

L606 10µH

DVDD

R2

0

C603

0.1

C611

C627

FRDR

C613

0.1

C626

2.2

R

DR

TFD

TR

FFD

L601

0

L605

X601

16.9MHz

R625

0

IC601

CXD3039AR

DSP IC

SYNC

C604

10 4V

10p

C622

R603

C610

C608

47

1

4V

L604

R614

220

R626

0

L320

A3

A2

A1

0

C607

47p

A0

10p

C621

DR

SFDR

SR

DS

DP

M

L602

0

470 470

100p

R612 100k

GRSCOR

AMUTE

MSDTI MSDTO

R4M

XRST SCOR

XSOE XLAT

MSCK

R206 100k

BEEP

XPWRSW

R106 100k

C351

0.22

C352

22

6.3V

C355

1000p

C628

2.2

A3

R225

10k

R223

4.7k

R224

2.2k

C210

2.2

A2

R201

220

R101

220

C222 470p

C223 470p

C224 470p

C353

22

6.3V

A0

A1

C122 470p

C123 470p

C124 470p

*R112,212

4.7k

EJ760/EJ761:AEP,EE,UK/EJ765

100k

EJ761:AUS,E/EJ768CK

R212

*

R210

22k

A9

AS XR

R112

*

R110

22k

IC301

AN17881F-E1

0

1

E

D

W X

R125

10k

R123

4.7k

R124

2.2k

IC41SV4105-100TG

*

R824 470k

303

VDR

C312

1000p

R316

R315

4.7µH

VDR101

R102 VD

1k

10k

L302

VDR201

202

VDR

D306

MM3Z5VT1

R317

0

D304

MM3Z5VT1

D303

MM3Z5VT1

D301

MM3Z5VT1

J302

J301

LINE

OUT

BUS-3

VCC3_2.65V

VCC

S-2 BU

VCC2_2.0V

6

A4

A

A5

A8

A7

-2 G

VIN

8

BUS-1

8

AS

D2

XC

D3

-1 G

2.0V

PU_ VC

SEL AD

B_I/O TS

KEY M R

AD