Sony DEJ-955 Service manual

D-EJ955

SERVICE MANUAL

Ver 1.2 2002.09

SPECIFICATIONS

AEP Model

UK Model

E Model

Australian Model

Chinese Model

Tourist Model

Model Name Using Similar Mechanism NEW CD Mechanism Type CDM-3325ES

Optical Pick-up Name DAX-25E

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 surf ace on the optical pick-up block with 7 mm aperture.)

D-A conversion

1-bit quartz time-axis control

Frequency response

20 - 20 000 Hz

307)

Output (at 4.5 V input level)

Line output (stereo minijack)

Output level 0.7 V rms at 47 kΩ Recommended load impedance over 10 kΩ

Headphones (stereo minijack)

Appro x. 5 mW + Appro x. 5 mW at 16 Ω (Approx. 0.5 mW + Approx. 0.5 mW at 16 Ω)* *For the customers in Fr ance

Optical digital output (optical output connector)

Output level: –21 - –15 dBm Wavelength: 630 - 690 nm at peak level

Power requirements

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

• Two Son y NC-6WM rechargeable batteries:

2.4 V DC

• Two LR6 (size AA) ba tteries: 3 V DC

+1

dB (measured by JEIT A CP-

–2

• AC power adaptor (DC IN 4.5 V jack): AEP, French, East European, E13 models: 220 - 230 V, 50/60 Hz UK model: 230 - 240 V, 50 Hz Australian model : 240 V, 50 Hz E33, Korean, Tourist models: 100 - 240 V, 50/60 Hz Hong Kong model: 220 V, 50/60 Hz Chinese model: 220 V , 50 Hz

Battery life* (appr o x. hour s)

(When you use the CD player on a flat and stable surface.) Playing time va ries de pending on ho w the CD player is used.

When using G-PROTECTION

“1” “ 2”

Two NC-6WM 19 19.5 (charged for about 5 hours**)

External battery case 66 71 (two alkaline ba tteries***)

Rechargeable batteries 88 92 NC-6WM and e xternal battery case (two alkaline ba tteries***)

* Measured value by the standard of JEITA

(Japan Electronics and Informa tion Technology Industries Association).

** Charging time varies depending on how the

rechargeable battery is used.

*** When using Sony alkaline batteries LR6 (SG)

(produced in Japan)

Operating temperature

5°C - 35°C (41°F - 95°F)

Dimensions (w/h/d) (excluding projecting parts and controls)

Approx. 135.0 × 135.0 × 15.9 mm

3

(5

⁄8 × 5

⁄8 × 21⁄32 in.)

Mass (excluding accessories)

Approx. 166 g (5.9 oz)

Supplied accessories

For the area code of the location in which you purchased the CD player, check the upper left side of the bar code on the package.

AC power adaptor (1) Headphones/earphones with remote control (1) Rechargeable batteries (2) Charging stand (1) Battery carrying case (2) Carrying pouch (1) External battery case (1) AC plug adaptor (1)*

* Supplied with E33 and tourist models

Design and specif ications are subject to change

without notice.

• Abbreviation E13: 220 - 230 V AC area in E model E33: 100 - 240 V AC area in E model

PORTABLE CD PLAYER

9-873-376-03 Sony Corporation

2002I0500-1 Personal Audio Company C 2002.09 Published by Sony Engineering Corporation

D-EJ955

SERVICING NOTES

D-EJ955

About CD-Rs/CD-RWs

This CD player can play CD-Rs/CD-RWs recorded in the CD-D A format*, but playback capability may vary depending on the quality of the disc and the condition of the recording device. * CD-DA is the abbreviation for Compact Disc Dig ital Audio. It is a recording standard used for the Audio CDs.

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 30 cm away from the objecti ve lens.

BEFORE REPLACING THE OPTICAL PICK-UP BLOCK

Please be sure to check thoroughly the parameters as par the “Optical Pick-Up Block Checking Procedures” (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 0.6 Vp-p

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

During normal operation of the equipment, emission of the laser diode is prohibited unless the upper lid is closed while turning ON the S804. (push switch type) The following checking method for the laser diode is operable.

• Method: Emission of the laser diode is visually checked.

1. Open the upper lid.

2. With a disc not set, turn on the S801 with a screwdri ver having

a thin tip as shown in Fig.1.

3. Press the

4. Observing the objective lens, check that the laser diode emits

light. When the laser diode does not emit light, automatic power control circuit or optical pickup is faulty. In this operation, the objective lens will move up and down 4 times along with inward motion for the focus search.

> N button.

S804

detection lever

MAIN board

Fig. 1 Method to push the S804

3

D-EJ955

SERVICE MODE

In the Service mode, this set can check the following.

1. Service Mode Setting Method

To set the service mode, perform as follows.

1) Make sure that the power is not turned on.

2) Check for the following states:

Open/close detection switch (S804)......OFF

Solder bridge at SL806 (OPEN)............ OPEN

[AVLS] switch (S802) ........................... NORM

[HOLD] switch (S801) .......................... OFF

•

[G PROTECTION] switch (S803) ....... 1

3) Short the solder bridge at the SL807 (TEST) on the MAIN board (see Fig. 2).

4) Turn the power on.

– MAIN Board (Component Side) –

R811

D803

C809

R807

SL807

(TEST)

R812

FB803

VDR8

C805

+

C440

+

C806

C807

C804

C464

SL806

(OPEN)

R808

C810

A

C811

K

A

D805

R813

2. Operation in Service Mode

When the Service mode is set, the LCD on the remote commander displays the following.

Remote commander LCD display

Microcomputer version display

All lit

Service mode

VD101

888

DDDD

BASS12

3. Operation of Buttons and Knobs in Service Mode

The following operation can be checked by operating the buttons and knobs on the set and remote commander.

3-1 . Case without Setting a CD

> N / . buttons on the set and > N / . knobs on

•

remote commander Optical pick-up movement (outward or inward) Tracking/sled servo off

Note: Do not look directly at the laser beam from the optical pick-up.

Do not move forcibly the optical pick-up exceeding the most-outside or most-inside track.

3-2 . Case with Setting a CD

Cheking method:

1) Make sure that the power is not turned on.

2) Leave a solder bridge of the SL807 (TEST) on the MAIN board shorted.

3) Turn the power on, and then set a CD and play it with the X button on the remote commander.

Fig. 2

Remote Commander LCD display

0000

(play mode)

• x button on the set and remote commander All servos (focus/tracking/sled) off

• > N / . buttons on the set and > N / . knobs on remote commander Optical pick-up movement (outward or inward) Tracking/sled servo off

• [PRT/ENT] button on remote commander Tracking gain up mode

Remote Commander LCD display

Up0000

(For the rest, turn the power off and then turn it on again)

• [VOL +] / [VOL --] buttons on the set and [VOL +] / [VOL --] knobs on remote commander 2-step volume setting

• [PLAYMODE] button on remote commander CL V speed becomes 1 to 4 times each time the button is pr essed Tracking/sled servo on

4

Remote Commander LCD display

D-EJ955

010001

040004

(For the rest, turn the power off and then turn it on again)

• [SOUND] button on remote commander

Servo auto adjustment

4.Service Mode Releasing Method

To release the service mode, perform as follows.

1) Turn the power off.

2) Open the solder bridge at the SL807 (TEST) on the MAIN board.

Note: Remove the solder completely.

5.Error Rate Check Display

The C1 error rate check display mode becomes active if the following operation is performed during the operation in the normal mode.

1) Turn the power off, and cancel other service operations.

2) Turn the power on, and then set a CD and play it with the X button on the remote commander.

Remote Commander LCD display

(1 time)

(4 times)

0000

3) Press the [SOUND] button on the remote commander to make automatic adjustment.

4) Press the [PLAY MODE] button on the remote commander.

Remote Commander LCD display

010001

5) Press the [DISPLAY] button on the remote commander, and the C1 error rate display will be activated and the LCD on the remote commander will display as follows.

Remote Commander LCD display

Er****

Note: In the play state, press the [SOUND] button on the remote com-

mander before pressing the [PLAY MODE] b utton. Wrong order of button operations will result in very large Er**** value.

6) Turn the power off.

7) Open the solder bridges at the SL807 (TEST) on the MAIN board.

Note: Remove the solder completely.

**** value 0000 to 0099 : OK more than 0100 : NG

5

D-EJ955

SECTION 2

GENERAL

This section is extracted from instruction manual.

Getting started

Locating the controls

For details, see pages in parentheses.

CD player (front)

1 EXT BATT (external battery)/

DC IN 4.5 V (external power input) jack (pages 7, 20, 22)

2 LINE OUT (OPTICAL) jack

(page 17)

3 VOL (volume) +*/– buttons

(page 8)

4 x (stop) /CHARGE button•

CHARGE lamp (pages 8, 15, 16, 19, 20)

5 .(AMS/search)•> N*

(AMS/search/play) buttons (pages 7, 8, 12)

6 i (headphones) jack

(page 7)

7 OPEN switch

(page 7)

8 Terminals for the charging stand

(pages 19, 25)

CD player (inside)

9 AVLS switch

(page 15)

q; G-PROTECTION

switch (page 13)

qa Battery

compartment

*The button has a tactile dot to help you operate the CD player by touch.

4

(page 19)

CD player (rear)

qs HOLD switch

(page 15)

Remote control

qd Display

(pages 9, 11 - 15)

qf Rotary control

N/>: play, AMS/search (pages 8, 12) .: AMS/search (pages 8, 12)

VOL +/–: Pull the control in the direction of the arrow, and then turn it toward + or –. (page 8)

qh Clip

qj DISPLAY

button (pages 13, 14)

qk PLAY MODE

button (pages 10 - 12, 16)

ql RPT (repeat)/ENT

(enter) button (pages 10 - 12)

qg x (stop) button

(pages 8, 16)

w; HOLD switch

(page 15)

wa i (headphones) jack

(page 7)

ws X (pause) button

(page 8)

wd SOUND button

(page 14)

Note

Use only the supplied remote control. You cannot operate this CD player with the remote control supplied with other CD players.

Getting started

5

Using the carrying pouch

You can carry your player and its battery case together using the supplied carrying pouch. Insert them into the proper places in the pouch as illustrated below.

6

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

3-2. UPPER LID (A) SUB ASSY

3-3. CABINET (UPPER) SUB ASSY

3-4. MAIN BOARD,

SECTION 3

DISASSEMBLY

SET

(Page 7)

(Page 8)

OPTICAL PICK-UP SECTION (CDM-3325ES) (Page 8)

D-EJ955

Ver 1.1

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

3-2. UPPER LID (A) SUB ASSY

3

guide (L)

5

guide (R)

2

screw (M1.4)

!

@

1

Open the upper lid (A) sub assy.

Note: To install screws, tighten them with 0.4kg/cm2 of torque.

(If tighten them too hard, portion

4

screw (M1.4)

!

may get cracked.)

6

Remove the upper lid (A) sub assy in the direction of arrow

A

.

A

7

D-EJ955

n

3-3. CABINET (UPPER) SUB ASSY

2

four screws (B2)

knob (GPRO)

3

claw

1

screw (B2)

4

cabinet (upper) sub assy

3

claw

2

three screws (B2)

3

claw

5

battery terminal board (relay)

6

spring (upper lid-2702)

S802

S803

Note : On installation of cabinet (upper) sub assy,

adjust the position of two switches (S802, S803) and two knobs (GPRO).

3-4. MAIN BOARD, OPTICAL PICK-UP SECTION (CDM-3325ES)

1

cushion

2

two connectors (CN501, CN502)

7

two insulators

6

main board

1

cushion

8

optical pick-up section (CDM-3325ES)

5

flexible board (CN503)

7

insulator

3

Hold up both the main board and the optical pick-up section at once, and remove them form the cabinet (lower) assy.

4

cabinet (lower) assy

Note : Handle the flexible board with care whe

you hold up the optical pick-up section.

8

SECTION 4

p

ELECTRICAL CHECK

D-EJ955

The CD section adjustments are done automatically in this set. In case of operation check, confirm that focus bias.

Precautions for Check

1. Perform check in the order given.

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

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

(J401) VOLUME : Minimum AVLS switch : NORM HOLD switch : OFF G•PROTECTION switch : 1

Connecting and Checking Location:

– MAIN Board (Component Side) –

TP418 (GND)

J301

LINE OUT (OPTICAL)

TP601 (RF)

Focus bias Check

Condition:

• Hold the set in horizontal state.

Connection:

MAIN board

TP601 (RF) TP418 (GND)

2 k

Ω

oscilloscope

(AC range)

+ –

Procedure:

1. Connect the oscilloscope to the test points TP601 (RF) and TP418 (GND) on the MAIN board.

2. Set a disc. (YEDS-18)

3. Press the > N 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 : 500 ns

OPTICAL PICK-UP

BLOCK

DAX-25E

R601 R603

R602 C601 C603

D403

CN503

1

15

R604

KA

R410

C604

C448

606

605

R305

C404

C449

+

R489

1

12

VDR304

C301

IC404

VDR303

RF level

0.4 to 0.6 Vp-

To watch the eye pattern, set the oscilloscope to AC range and

FB201

VDR201

VDR301

R303

C202

FB301

R202

R304

R201

VDR101

24

FB101

R469

R101

C452 C453

C102

C454

13

R102

55

increase the vertical sensitivity of the oscilloscope for easy watching.

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

99

D-EJ955

SECTION 5

DIAGRAMS

5-1. BLOCK DIAGRAM – MAIN Section (1/2) –

DETECTOR

A

(Page 12)

B

(Page 12)

C

(Page 12)

OPTICAL PICK-UP BLOCK

LASER DIODE

PD

LD

(FOCUS)

2-AXIS

DEVICE

(TRACKING)

M902

(SPINDLE)

V

U

W

VG

• SIGNAL PATH

: CD PLAY (ANALOG OUT)

: CD PLAY (OPTICAL OUT)

A

B

RF

E

F

VCC

DAX-25E

PD

OPSTB

OPGSW

LD

A

B

RF

E

F

VCPU B+

M901

M

(SLED)

U1

19

18

17

20

11

13

15

21

V1

W1

COM

U

V

W

VG

+

PREDRIVER

FOCUS/TRACKING COIL DRIVER

SLED MOTOR DRIVER

IC403 (1/2)

FO2

34

RO2

32

FO1

38 36

26 24

CONTROLLER,

RO1

H BRIDGE DRIVER

FO4 RO4

SPINDLE MOTOR DRIVER

IC404

CONTROL

CIRCUIT

RI2

RI1

RF AMP,

DIGITAL SIGNAL PROCESSOR,

DIGITAL SERVO PROCESSOR,

D-RAM CONTROLLER

IC601

A

92

B

91

RFDC

88

RFAC

81

E

89

F

90

FI2

17 18

FI1

40 41

FI4

21

FI4

22

SYNC

1

CPU

INTERFACE

XRST

6

PWM

APWM

XBRAK

DATA

CLK

XLTCH

24 23

2

FG

3

7 9 8

BUFFER

IC405

100

99

96 95

98 97

104 103 102

72

74

77

78

SFDR SRDR

FFDR FRDR

TFDR TRDR

C176 MDP MDS

FG/FGSEL

XDRVLT

HG XSTB

HG GUP

S801

HOLD

OFF

SCOR

27

40

SCOR

HOLD

VCPU B+

WDCK

WFCK

MDS

XTAO

XTAI

RFAC

MDP XSOE SENS R4M XLAT CLOK SCOR SDTO

RFDC

SFDR

SRDR

FFDR FRDR TFDR

TRDR

SL806

(OPEN)

E

F B A

SIGNAL

PROCESSOR

BLOCK

SDTD

SENS

CLOK

161415181711

MSDTI

MSDTO

CLOSE

28

XLAT

MSCK

S804

OPEN

D-RAM

IC602

DOUT

AOUTL, AOUTR

HPL, HPR

LRMU

XRST

SYNC

D

E

F

G

H

J

(Page 11)

(Page11)

(Page 12)

SYSM

25

13

AMUTE

DOUT

62

D0-D3

4, 3, 6, 5

A0-A10

116 – 113, 17 – 15, 13 – 11, 117

XRAS

1

XWE

2

XCAS

9

XTAI

47

XTAO

48

AOUT1

51

AOUT2

56

HPL

43

HPR

44

LRMU

61

XRST

28

D1 – D4A0 – A10

2, 3, 24, 25

9 – 12, 15 – 19, 21, 8

5

XRAS

4

XWE

23

XCAS

X601

16.9344MHz

DIGITAL

OUT

MEMORY

CONTROLLER,

BUS BOOST

BLOCK

LPF

SERVO BLOCK

R4M

XSOE

WDCK

242232232021

26

2

12

XIN

XLAT

XSOE

GRSCOR

SYSTEM CONTROLLER

VCPU B+

FOK

65

9

FOK

IC801 (1/3)

SCK

SDTO

K

L

(Page 12)

1010

5-2. BLOCK DIAGRAM – MAIN Section (2/2) –

D-EJ955

(Page 10)

VCC3

DOUT

D

AOUTL

HPL

HPR

AOUTR

MUTING

Q303

LINE MUTING

CONTROL SWITCH

Q302

13

12

17

18

15

MUTE_SW

HEADPHONE AMP

IN_L

IN_R

PW_SW

BEEP

IC301

MUTE SW

PW SW

BEEP

OUT_L

OUT_R

BEEPO_L

BEEPO_R

4

9

3

10

S805-809

E

F

LRMU

G

XRST

H

B+ SWITCH

Q301

VCPU B+

OPTICAL

TRANSCEIVER

(LINE OUT JACK)

J302

i

VCPU 2V

4

3

TSB

2

RMKEY

GND

1

J301

LINE OUT

(OPTICAL)

SL807 (TEST)

6 24 79 30 2625

P21

SYSTEM CONTROLLER

IC801(2/3)

AD SEL

XRST

BEEP

S802

AVLS

LIMIT

NORM

39

AVLS

VCPU B+

S803

G•PROTECTION

2

1

AD KEY

ESP

38

31

TSB

AD RMKEY

VCPU B+

• SIGNAL PATH

: CD PLAY (ANALOG OUT)

: CD PLAY (OPTICAL OUT)

1111

D-EJ955

5-3. BLOCK DIAGRAM – POWER SUPPLY Section –

(Page 10)

VG

C

PD

A

SYNC

J

SDTO

L

SCK

K

LD

B

SYSTEM CONTROLLER

IC801 (3/3)

AD CHGMNT

XPOWLT

XWAKE

RESET

LEDDISP

PPG

AGCPWN

POWER CONTROL

IC403 (2/2)

PAPC

3

SYNC

11

DATA

14

CLOCK

13

VLGO4

69

INM4

6

RF4

5

RF41

2

75

66

8

80

29

70

NC

10

21

D801

CHARGE

VCC1

VCPU B+

VCC2

B+ SWITCH

Q418

SWITCHING

Q419

SWITCHING

Q420

VCC3

15

12

16

51

56

61

50

57

75

74

73

78

7

53 79

1

49

58

LATCH

WAKE

RSTB

VCC1

INP2

VLGO2

VCPU

STNG

VCC3

VCC2

VLGO3

RF3

APCREF

DTC2

DTC3 VREF

VDRAM

CHGMNT

VREF

CHGSW RF1 INM1 RS1

VIN

DTC3 INP2 VCC1 VCC2 VCC3 VCPU

WAKE

LATCH DATA CLOCK

RF41 RF4 INM4 APCREF PAPC DTC2

LINEAR

CONSTANT CURRENT,

CONSTANT VOLTAGE CHARGING BATTERY

CHARGE CIRCUIT

SWITCHING

POWER

CIRCUIT

SWITCHING

POWER

CIRCUIT

LINEAR

REGULATOR

INTERFACE

CLK

OR OSC

SAW GEN.

CHARGING BATTERY VOLTAGE DETECTOR

CIRCUIT

PRE-DRIVER

VG

POWER

CIRCUIT

VLGO4

VLGO2

VLG3

VG

L5

BATM1

BATM2

CHGMNT

DC IN

BATM1 BATM2

RF1

INM1

DCIN

RS1

CHGSW

VIN

Q421, 422

VIN B+

CHARGE

CHARGE ON

SWITCH

Q412

B+ SWITCH

Q416, 417

+

–

RECHARGEABLE

BATTERY NC-6WM

2PCS. 2.4V

J401

EXT BATT

DC IN 4.5V

–

CHARGE

TERMINAL

+

VG

9

L5

8

60 59

46

45

48

43

42

65

CHARGE

CONTROL

Q406, 415

B+ SWITCH

IC402

CHARGE ON

SWITCH

Q403

D405

RIPPLE

FILTER

Q408

D403

D404

B+ SWITCH

AD DCINMNT

EXTBATT

AD BATMNT

CHGGND ON

BATVCC ON

XSTAND ON

27

33

22

76

7

37

EXTERNAL BATTERY

DETECT

Q407

CHARGE STAND

DETECT

Q407

1212

D-EJ955

400 to 600 mVp-p

2.0 Vp-p

950 ns

5-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

z

•

• : Pattern from the side which enables seeing. (The other layers' patterns are not indicated.)

Caution: Pattern face side: Parts on the pattern face side seen from (Conductor Side) the pattern face are indicated. Parts face side: Parts on the parts face side seen from (Component Side) the parts face are indicated.

• MAIN board is multi-layer printed board. Howev er , the patterns

: Through hole.

of intermediate-layer have not been included in the diagram.

Note on 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/ specified.

• % : indicates tolerance.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety. Replace only with part number specified.

• A : B+ Line.

• Pow er voltage is dc 4.5 V and fed with regulated dc power supply from DC IN jack (J401).

• V oltages and wa vef orms are dc with respect to ground in no-signal conditions. no mark : CD PLAY

• V oltages 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.

J : CD PLAY (ANALOG OUT) c : CD PLAY (OPTICAL OUT)

4

W or less unless otherwise

• Waveforms

1 IC404 9 (CLK)

950 ns

2 IC601 w; (CLOK)

950 ns

2.0 Vp-p

6 IC601 ik (RFDC) (CD play mode)

7 IC403 qd (CLOK)

2.0 Vp-p

950 ns

3 IC601 es (R4M)

236 ns

4 IC601 rk (XTAO)

59.1 ns

2.5 Vp-p

2.4 Vp-p

8 IC801 2 (XIN)

2.5 Vp-p

236 ns

9 IC801 qk (MSCK)

5 IC601 if (RFAC) (CD play mode)

400 to 600 mVp-p

1313

D-EJ955

5-5. PRINTED WIRING BOARD

1 2 3 4 5 6 7 8 9 10 11 12 13 14

A

B

C

D

R819

S809

VOL –

D801

E

CHARGE

R818

F

J302

i

G

H

I

J

MAIN BOARD

(COMPONENT SIDE)

S808

VOL +

Q303

1E 1B 2C

R301

IC405

D407

R821

S805

x/CHARGE

R814

C814

R815

R816

R817

S807

.

C104

C106

C307

S806

> N

J401

EXT BATT

DC IN 4.5V

–

1C 2B

2E

C456

C812

D601

X601

R103

C107

C306

+

L303

+

2E

3

R471

AK

R470

C617

C625

R104 C105 R105

R108

R106 R206

C309

R302

2B

Q302

4

C618

C621

1C

+

R620

C619

C310

2C

1B

5

1

+

R625

1E

R467

C457

R621

FB601

+

C108

C450

L501

L502

D406

C451

+

FB602

C622

R634

K

A

C616

C620

FB302

C447

R468

L503

C615

R623

L602

R626

C623

SL808

+

C208

FB102

C801

C312

FB401

6

4

Q412

3

1

R477

B

C

E

R478

Q414

BCE

Q301

C608

14

4

L413

C501

C610

+

C607

1

CN501

IC602

26

R805

VDR801

R804

SL809

FB801

SL810

C805

D804

FB202

R458

+

C440

R801

C802

R802

D408

AK

EB

Q405

C

+

C804

C426

R479

C502

+

C807

+

C806

SL806

(OPEN)

C464

+

C425

FB402

12

CN502

13

1

L604

A

R808

C810

C811

C401

+

C444

L403

L405

K

D805

R813

R435

VDR403

R635

+

A

C462

C624

VDR601

D803

SL807

(TEST)

R474

L410

R439

C432

C808

R811

+

C809

FB803

R807

FB404

L401

R812

VDR804

L411

2 RED

1 BLK

D601,

D804, 805

S802

C446

+

C466

S804 OPEN

4

1

FB405

+

BLK ORG WHT RED

S802 AVLS LIMIT

NORM

C422

+

C433

M

L409

L408

M901

(SLED)

G

•

PROTECTION

S803

L404

S803

2

1

V

W

M902

(SPINDLE)

L406

C419

L402

R417

+

U

C412

C408

C424

R418

+

C413

+

R437

C411

R413

R416

R421

R444

1-682-611-

• Semiconductor Location

D303 H-13 D304 H-13 D305 H-13 D306 H-13 D307 H-13 D401 J-9 D403 B-12 D404 I-11 D405 I-11 D406 C-3 D407 D-2 D408 H-3 D601 E-2 D801 E-1 D803 G-4 D804 G-3 D805 G-4

IC301 F-13 IC402 I-12 IC403 H-10 IC404 D-13

R484

4

RECHARGEABLE

BATTERY NC-6WM

2PSC. 2.4V

11

(11)

6

D401

Ref. No. LocationRef. No. Location

IC405 D-2 IC601 E-12 IC602 E-4 IC801 G-12

Q301 C-3 Q302 C-2 Q303 C-2 Q403 H-9 Q405 H-3 Q406 H-12 Q407 J-10 Q412 B-3 Q414 C-3 Q415 H-9 Q416 I-9 Q417 H-9 Q418 H-10 Q419 G-9 Q420 G-10 Q421 I-12 Q422 I-12

1E

2C

1B

Q419

Q418

1C

R490

R491

1E

B

E

Q403

C

Q417

BE

Q416

R420

C418 R436

AK

C405

3

1

R443

SDG

C

Q415

R483

R432

C417

C409

R442

R422

C421 R445 C423

R423

R426

– +CHARGE TEMINAL

2B

R419

C414

1B

R441

2E

2C

R440

41

C416

60

2E

R485

C429

R424

R457

R486

2B

J301

LINE OUT

TP418

(GND)

(OPTICAL)

MAIN BOARD

(CONDUCTOR SIDE)

OPTICAL PICK-UP

BLOCK

DAX-25E

R602 C601

R601 R603

C603

R606 R614

C602

20

R609

C612

120

91

C611

R619

1

C613

R615

R607

R608

C614

C626

R622

21

IC801

R487

1E

2C

Q407

R447

R448

R425

BCE

Q420

2E

D404

VDR401

1B

2B

1C

21

80

AK

20

1

R449

R481

R463

D405

R454

C439

R450

C436

C465

C437

C438

R480

KA

40

R455

C442

C445

R460

R461

C434

41

C406

Q406

R465

R414

C443

C469

3

4

C431

Q421

1-682-611-

11

R409

B

C468

Q422

(11)

1C

40

IC403

61

R446

R459

C435

R429

R452 R456

D403

CN503

C

E

1

6

1

15

R604

2B

2C

KA

R410

TP601

(RF)

C604

C448

C606

C605

R605

R618

IC601

R482

8

R415

1

E

1B

1C

R488

C404

R305

R489

C449

+

12

R612

C609

R613

R632

1

60

R401

5

4

IC402

1

80

61

VDR304

C301

IC404

R610

R611

R631

C803

R806

D307

VDR202

R428

C403

VDR303

R630

R629

R307

R107

D303

KA

R628

R820

R207

R627

R310

6190

30

13

AK

24

1

60

31

C311

R309

VDR102

FB403

FB101

R469

C452 C453

C454

C455

C305

C304

IC301

R308

AK

D306

FB201

VDR201

VDR101

R101

C102

R102

C302

FB304

KA

D304

D305

+

13

12

FB303

S801 HOLD HOLD

C313

C202

OFF

C303

C204

VDR301

FB301

C207

R202

R201

R203

C205

R208

R204

R303

R803

R304

C206

VDR803

R492

R205

1414

Sony DEJ-955 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

3-2. UPPER LID (A) SUB ASSY

cabinet (upper) sub assy

3-4. MAIN BOARD, OPTICAL PICK-UP SECTION (CDM-3325ES)

ELECTRICAL CHECK

DIAGRAMS

5-1. BLOCK DIAGRAM – MAIN Section (1/2) –

5-2. BLOCK DIAGRAM – MAIN Section (2/2) –

5-3. BLOCK DIAGRAM – POWER SUPPLY Section –

5-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

5-5. PRINTED WIRING BOARD