Sony D-EJ855 Service Manual

		D-EJ855
	SERVICE MANUAL	US Model
	Ver 1.3 2003.11	Canadian Model
	Ver 1.3 2003.11	AEP Model
		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

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.)

D-A conversion

1-bit quartz time-axis control

Frequency response

20 - 20 000 Hz +1–2 dB (measured by JEITA CP307)

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)

Approx. 5 mW + Approx. 5 mW at 16 Ω (Approx. 0.5 mW + Approx. 0.5 mW

at 16 Ω)*

*For the customers in France

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 Sony NC-6WM rechargeable batteries: 2.4 V DC

•Two LR6 (size AA) batteries: 3 V DC

•AC power adaptor (DC IN 4.5 V jack):

US, Canadian, Taiwan models: 120 V, 60 Hz AEP, French, 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* (approx. hours)

(When you use the CD player on a flat and stable surface.)

Playing time varies depending on how the CD

Operating temperature

5°C - 35°C (41°F - 95°F)

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

Approx. 135.0 × 18.2 × 135.0 mm (5 3⁄8 × 23⁄32 × 5 3⁄8 in.)

Mass (excluding accessories)

Approx. 172 g (6.1 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.

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 batteries***)

Rechargeable batteries	88	92
NC-6WM and
external battery case
(two alkaline batteries***)

*Measured value by the standard of JEITA (Japan Electronics and Information Technology Industries Association).

**Charging time varies depending on how the rechargeable battery is used.

***When using Sony alkaline batteries LR6 (SG) (produced in Japan)

AC power adaptor (1)

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

Battery carrying case (2) Carrying pouch (1) External battery case (1) AC plug adaptor (1)*1

*1 Supplied with E33 and Tourist models

Design and specifications 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

9-873-379-04 Sony Corporation

2003K05-1 Personal Audio Company

C 2003.11 Published by Sony Engineering Corporation

D-EJ855

	TABLE OF CONTENTS
1.	SERVICING NOTES ...............................................	3
2.	GENERAL ...................................................................	6

3.DISASSEMBLY

3-1.	Disassembly Flow ...........................................................	7
3-2.	Upper Lid (M) Sub Assy .................................................	7
3-3.	Cabinret (Upper) Sub Assy .............................................	8
3-4. MAIN Board, Optical Pick-up Section
	(CDM-3325ES) ...............................................................	8
4.	ELECTRICAL CHECK ..........................................	9

5.DIAGRAMS

5-1.	Block Diagram – MAIN Section (1/2) – .......................	10
5-2.	Block Diagram – MAIN Section (2/2) – .......................	11
5-3.	Block Diagram – POWER SUPPLY Section – .............	12
5-4. Note for Printed Wiring Boards and
	Schematic Diagrams .......................................................	13
5-5.	Printed Wiring Board ......................................................	14
5-6.	Schematic Diagram – MAIN Board (1/3) – ..................	15
5-7.	Schematic Diagram – MAIN Board (2/3) – ..................	16
5-8.	Schematic Diagram – MAIN Board (3/3) – ..................	17
5-9.	IC Pin Function Description ...........................................	18

6.EXPLODED VIEWS

6-1.	Upper Lid, Cabinet (Upper) Section ..............................	25
6-2.	Cabinet (Lower) Section .................................................	26
3-4.	Optical Pick-up Section (CDM-3325ES) .......................	27
7.	ELECTRICAL PARTS LIST ...............................	28

On AC poweradaptor

•Use only the AC power adaptor supplied or recommended in “Accessories (supplied/ optional).” Do not use any other AC power adaptor. It may cause a malfunction.

Polarity of the plug

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.

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.

CAUTION

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

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0ON THE SCHEMATIC DIAGRAMS

AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0

SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

D-EJ855

SECTION 1

SERVICING NOTES

About CD-Rs/CD-RWs

This CD player can play CD-Rs/CD-RWs recorded in the CD-DA 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 Digital 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 objective 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 screwdriver having a thin tip as shown in Fig.1.

3.Press the > N button.

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.

detection lever

S804

MAIN board

Fig. 1 Method to push the S804

D-EJ855

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) –

	+	C806			K			R812
	+	C806			K	D803	R811
	C805						R811
	C805						C809
	C807
				A	A
		R808
+	C804			R813	D805		FB803	VDR8
	C804							VDR8
C440	C464	C810	C811
C440	C464	C810	C811				R807
							R807

SL806 SL807 (OPEN) (TEST)

Fig. 2

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		VD101
version display		VD101
version display
All lit	888	BASS12
Service mode		DDDD

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-out- side 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.

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

CLV speed becomes 1 to 4 times each time the button is pressed Tracking/sled servo on

D-EJ855

Remote Commander LCD display
010001	(1 time)
040004	(4 times)

(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

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

Note: In the play state, press the [SOUND] button on the remote commander before pressing the [PLAY MODE] button. 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.

D-EJ855

Getting started

Locating the controls

For details, see pages in parentheses.

CD player (front)

1EXT BATT (external battery)/ DC IN 4.5 V (external power input) jack (pages 7, 19, 21)

2LINE OUT (OPTICAL) jack (page 17)

3VOL (volume) +*/– buttons (page 8)

4 x(stop) /CHARGE button• CHARGE lamp

(pages 8, 15, 16, 19)

5.(AMS/search)•> N* (AMS/search/play) buttons (pages 7, 8, 12)

SECTION 2	This section is extracted from
GENERAL	instruction manual.
GENERAL

Remote control

qs Display

(pages 9, 11 - 15)

qd 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)

qg Clip

qf x(stop) button (pages 8, 16)

ql HOLD switch (page 15)

started Getting

6 i (headphones) jack (page 7)

7OPEN switch (page 7)

CD player (inside)	CD player (rear)
8AVLS switch
(page 15)
9G-PROTECTION
switch	qa HOLD switch
(page 13)	(page 15)
q;Battery
compartment
(page 19)

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

qh DISPLAY button

(pages 13, 14)

qj PLAY MODE button

(pages 10 - 12)

qk RPT (repeat)/ENT (enter) button (pages 10 - 12)

w; i (headphones) jack (page 7)

wa X(pause) button (page 8)

ws 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.

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.

SECTION 3

DISASSEMBLY

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

3-1. DISASSEMBLY FLOW

SET

3-2. UPPER LID (M) SUB ASSY (Page 7)

3-3. CABINET (UPPER) SUB ASSY (Page 8)

3-4. MAIN BOARD,

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

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

3-2. UPPER LID (M) SUB ASSY

3 guide (L)

5 guide (R)

D-EJ855

Ver 1.1

Note: To install screws, tighten them with!0.4 kg/cm2 of torque. (If tighten them too hard, portion may get cracked.)

2screw (M1.4)

4 screw @ (M1.4)

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

1 Open the upper lid (M) sub assy.

D-EJ855

3-3. CABINET (UPPER) SUB ASSY

knob (GPRO)

3 claw

1 screw (B2)

4 cabinet (upper) sub assy

Note: On installation of cabinet (upper) sub assy, adjust the position of two switches

(S802, S803) and two knobs (GPRO).

2 four screws		2 three screws
(B2)
	3 claw	(B2)

3 claw

5 battery terminal board (relay)

6 spring (upper lid-2702)

S802

S803

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

1 cushion

	1 cushion	2 two connectors
	1 cushion	(CN501, CN502)
		(CN501, CN502)
		7 two insulators

6 main board

5 flexible board (CN503)

4 cabinet (lower) assy

8 optical pick-up section (CDM-3325ES)

7 insulator

3Hold up both the main board and the optical pick-up section at once, and remove them from the cabinet (lower) assy.

Note: Handle the flexible board with care when you hold up the optical pick-up section.

D-EJ855

SECTION 4

ELECTRICAL CHECK

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 (Part 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)

		C404
	A	R305		VDR303
D403	K	R305	R489	VDR303
D403
				VDR304

OPTICAL PICK-UP BLOCK DAX-25E

R602

R601 C601

R603 C603

1	R410
1
CN503
15
R604 C604	C449
R604 C604	+
	C448
606	605

C301
		R469	VDR101
1	24	R469	FB101
1	24

IC404	C452	C102
	C453	C102
	C454
12	13
	55

FB201		VDR301
VDR201		VDR301
			R303
			R304
			FB301
	R101		R202
	R101		R201
R102			R201
R102	C202

Focus bias Check

Condition:

• Hold the set in horizontal state.

Connection:

		oscilloscope
		(AC range)
	MAIN board	2 k Ω
	TP601 (RF)	2 k Ω
	TP601 (RF)	+
	TP418 (GND)	–

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

RF level

0.4 to 0.6 Vp-p

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

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

9 9

D-EJ855

SECTION 5

DIAGRAMS

5-1.

BLOCK DIAGRAM – MAIN Section (1/2) –

RF AMP,

DIGITAL SIGNAL PROCESSOR,

DIGITAL SERVO PROCESSOR,

D-RAM CONTROLLER

DETECTOR

IC601

WDCK

DIGITAL

DOUT

(Page 11)

WFCK

OUT

D-RAM

RFDC

MDS

IC602

RFAC

XTAO

24,3,2,25

D0-D3

6,3,4,5

D4–D1

XTAI

VCC

VCPU B+

117

RFAC

OPTICAL PICK-UP BLOCK

SIGNAL

–1315,–17113,11,

21,19,–1512,–9 8

A10–A0

DAX-25E

PROCESSOR

BLOCK

A0-A10

OPSTB

MEMORY

MDP

OPGSW

CONTROLLER,

XSOE

BUS BOOST

SENS

BLOCK

–

R4M

LASER DIODE

116

XLAT

FOCUS/TRACKING COIL DRIVER

CLOK

XRAS

SLED MOTOR DRIVER

SCOR

XWE

IC403 (1/2)

SDTO

XCAS

23 XCAS

(Page 12)

M901

FO2

FI2

100

SFDR

XTAI

(SLED) M

RO2

RI2

SRDR

X601

XTAO

16.9344MHz

(Page 12)

FO1

FI1

FFDR

CONTROLLER,

AOUT1

(FOCUS)

RO1

H BRIDGE DRIVER

RI1

FRDR

LPF

AOUTL,

AOUT2

AOUTR

(Page 11)

2-AXIS

DEVICE

FO4

FI4

TFDR

HPL

HPL,

(TRACKING)

RO4

FI4

TRDR

RFDC

HPR

(Page 11)

SPINDLE MOTOR DRIVER

FOK

IC404

SFDR

SERVO

SRDR

BLOCK

LRMU

FFDR

LRMU

(Page 11)

FRDR

XRST

SYNC

TFDR

(Page 11)

C176

TRDR

PWM

BUFFER

104

MDP

APWM 23

IC405

103

MDS

CONTROL

XBRAK

102

SCOR

SDTD

SENS CLOK XLAT

R4M

XSOE WDCK

FOK

SYSM

CIRCUIT

21 22 20 23

32 24 26

M902

(SPINDLE)

20 COM

17 16 18 15

14 12

CLK

FG/FGSEL

SCOR

MSDTO

MSDTI MSCK XLAT

XIN

XSOE GRSCOR

FOK

AMUTE

DATA

CPU

XLTCH

SYSTEM CONTROLLER

PREDRIVER

INTERFACE

XDRVLT

IC801 (1/3)

HG XSTB

HOLD

15 W

HG GUP

S801

VCPU B+

21 VG

HOLD

XRST

HOLD

SL806

S804

(Page 12)

(OPEN)

OPEN

OFF

• SIGNAL PATH

VCPU B+

: CD PLAY (ANALOG OUT)

: CD PLAY (OPTICAL OUT)

SYNC

(Page 12)

SCK

(Page 12)

SDTO

(Page 12)

D-EJ855

5-2.

BLOCK DIAGRAM – MAIN Section (2/2) –

VCC3

B+ SWITCH

Q301

(Page 10)

D DOUT

OPTICAL

J301

TRANSCEIVER

LINE OUT

(OPTICAL)

AOUTL

(Page 10)

AOUTR

(LINE OUT JACK)

MUTING

Q303

J302

HEADPHONE AMP

IC301

HPL

IN_L

OUT_L

(Page 10)

HPR

IN_R

OUT_R

LINE MUTING

BEEPO_L

CONTROL SWITCH

Q302

BEEPO_R

(Page 10)

LRMU

17 MUTE_SW MUTE SW

VCPU B+

18 PW_SW

PW SW

BEEP

VCPU 2V

TSB

RMKEY

GND

(Page 10)

XRST

S805-809

SL807

(TEST)

31 26

P21

AD SEL

XRST

BEEP

AD KEY

TSB

RMKEY

SYSTEM CONTROLLER

IC801(2/3)

AVLS

ESP

S802

S803

VCPU B+

AVLS

VCPU B+

G•PROTECTION

LIMIT

NORM

• SIGNAL PATH

: CD PLAY (ANALOG OUT)

: CD PLAY (OPTICAL OUT)

11 11

D-EJ855

5-3. BLOCK DIAGRAM – POWER SUPPLY Section –

(Page 10) C	VG

POWER CONTROL

IC403 (2/2)

(Page 10)

PAPC

(Page 10)

SYNC

(Page 10)

SDTO

DATA

BATM1

CHARGING BATTERY

SCK

CLOCK

BATM2

(Page 10)

CHGSW

VOLTAGE DETECTOR

CIRCUIT

CHGMNT

(Page 10)

VLGO4

RF1

LINEAR

INM4

INM1

CONSTANT CURRENT,

RS1

CONSTANT VOLTAGE

CHARGING BATTERY

RF4

VIN

CHARGE CIRCUIT

VIN B+

RF41

D405

B+ SWITCH

LATCH

RF4

CHARGE

Q416, 417

RECHARGEABLE

XPOWLT 75

SWITCHING

BATM1

BATTERY

INM4

POWER

BATM2

NC-6WM

WAKE

APCREF

XWAKE 66

CIRCUIT

2PCS. 2.4V

RESET

RSTB

PAPC

RIPPLE

D801

DTC2

B+ SWITCH

VLGO4

FILTER

Q421, 422

CHARGE

PRE-DRIVER

Q408

VCC1

DTC3

VCC1

SWITCHING

CHARGE

B+ SWITCH

INP2

RF1

LEDDISP

POWER

CONTROL

Q418

VLGO2

VCC1

CIRCUIT

VLGO2

Q406, 415

VCC2

INM1 45

PPG 29

VCPU

LINEAR

VCPU B+

VCC3

VCPU

REGULATOR

VLG3

STNG

J401

SWITCHING

VCC3

DC IN

EXT BATT

WAKE

DC IN 4.5V

Q419

VCC2

DCIN

D403

–

LATCH

SYSTEM CONTROLLER

INTERFACE

B+ SWITCH

VLGO3

DATA

IC402

VCC2

IC801 (3/3)

CLOCK

RF3

POWER

CIRCUIT

RS1

CHARGE ON

SWITCHING

SWITCH

Q420

Q403

CLK

SAW

AGCPWN 70

APCREF

OR OSC

GEN.

CHGSW 42

DTC2

DTC3

VREF

VIN

VREF

CHARGE ON

NC 10

VDRAM

SWITCH

CHGMNT

AD CHGMNT 21

Q412

AD DCINMNT 27

EXTBATT 33

EXTERNAL BATTERY

DETECT

Q407

AD BATMNT 22

CHGGND ON 76

BATVCC ON

12 12

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 : Through hole.

• : 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. However, the patterns of intermediate-layer have not been included in the diagram.

Note on Schematic Diagram:

•All capacitors are in µ F unless otherwise noted. pF: µµ F

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.

•C: panel designation.

Note:	Note:
The components identi-	Les composants identifiés par
fied by mark 0or dotted	une marque 0sont critiques
line with mark 0are criti-	pour la sécurité.
cal for safety.	Ne les remplacer que par une
Replace only with part	pièce portant le numéro
number specified.	spécifié.

•A: B+ Line.

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

•Voltages and waveforms are dc with respect to ground in no-signal conditions.

no mark : CD PLAY

•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.

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

• Waveforms

1 IC404 9 (CLK)

950 ns

2 IC601 w; (CLOK)

950 ns

3 IC601 es (R4M)

D-EJ855

6 IC601 ik (RFDC) (CD play mode)

2.0 Vp-p	400 to 600
	mVp-p

2.0 Vp-p

7 IC403 qd (CLOK)

950 ns

8 IC801 2 (XIN)

2.0 Vp-p

236 ns

4 IC601 rk (XTAO)

2.5 Vp-p

	236 ns
	9 IC801 qk (MSCK)
2.4 Vp-p	2.0 Vp-p

59.1 ns

950 ns

5 IC601 if (RFAC) (CD play mode)

400 to 600 mVp-p

13 13

D-EJ855

5-5. PRINTED WIRING BOARD

MAIN BOARD

• Semiconductor Location

(COMPONENT SIDE)

Ref. No.

Location

Ref. No.

Location

J301

J401

D303

H-13

IC405

D-2

LINE OUT

TP418

(OPTICAL)

EXT BATT

D304

H-13

IC601

E-12

DC IN 4.5V

(GND)

–

D305

H-13

IC602

E-4

D306

H-13

IC801

G-12

MAIN BOARD

FB401

D307

H-13

Q301

C-3

(CONDUCTOR SIDE)

C404

D401

J-9

D403

B-12

Q302

C-2

D404

I-11

Q303

C-2

R305 R489

VDR303

D405

I-11

Q403

H-9

D403

Q412

D406

C-3

Q405

H-3

R479

FB402

BLK

D407

D-2

Q406

H-12

VDR304

R477

ORG

D408

H-3

Q407

J-10

E C

WHT

R410

R478 Q414

RED

D601

E-2

Q412

B-3

VDR403

S808

D801

E-1

Q414

C-3

OPTICAL

C301

FB201

E C B

D803

G-4

Q415

H-9

PICK-UP

TP601

VDR201

VOL +

R302

2C 1B 1E

Q301

M902

D804

G-3

Q416

I-9

BLOCK

(RF)

(SPINDLE)

DAX-25E

R303

Q303

D805

G-4

Q417

H-9

R304

Q418

H-10

FB301

VDR301

2B 1C

D406 A

R468C447

CN501

C501

C502

IC301

F-13

Q419

G-9

CN503

R469 FB101

VDR101

R301

C449

Q302

IC402

I-12

Q420

G-10

IC405

R467

C450

R602

IC404

R202

C451

RED

IC403

H-10

Q421

I-12

R604

C604

C452

C102

R101

C456

R601 C601

C453

R102

R201

M901

IC404

D-13

Q422

I-12

R603 C603

C448

C454

C202

R471

D407

R621 C457

L501

CN502

(SLED)

C605 R612

A K

L503

R610

L413

R606

R470

C610

BLK

R821

L502

R614

S809

R819

C812

C617

C607

R615

C602 R619

R605 C606

R618

R613

C609

R611

C455

C615

C608

R607

VOL –

R620

C616

C612

C611

S801

D601

HOLD

R623

R635

R608

D801

S805

C618

C613

HOLD

x/CHARGE

R609

OFF

R803

FB602 C620

R814

X601

C619

IC602

C614

VDR803

CHARGE

L602

R815 C814

C621 +

D601,

R818

IC601

D804, 805

R816

C625

R625

C626

C622

R817

R492

C303

R103

R626

R622

S807

C305

R204

C104

R104

C623

120

C304

C106

C105

FB601

R634

C624

C302

C204

R203

C107

R105

30 24

C205

R108

SL808

R106

R805

L604

S802

S803

R632

R631

IC301

C206 R205

C307

R206

VDR801

VDR601

AVLS

G • PROTECTION

R630 R629 R628

R627

C207

C306

LIMIT

R208

S806

R804

C108

NORM

> N

L303

C309

SL809

C808

C310

C208

R812

FB801

C806

D803

R811

C807

R417

C408

J302

SL810

C809

IC801

FB303

D804

C805

R418

SL807

R486

FB102

FB202

R808

(TEST)

S802

R487

C803

SL806

R458

(OPEN)

FB803

C411

2C 1B 1E

R820

2E 2B 1C

R806

C804

VDR804

C311

C801

C811 R813

D805

Q419

Q420

R307

FB304

C440

C464

FB405

Q418

2E 2B 1C

R310

1C 2B 2E

C313

C802 R802

R801

R807

D307

S803

C413

R490 R491

R485

D408

C401

R435

R309

R308

R409

R107

+ C810

1E 1B 2C

R474

FB404

Q403 E

R419

R482

D305 K

D304 K

C462

L406

C414 41

D303

C424

D306

FB302

Q417

R207

C419

C446 C422 L409L408

SGD

R440

IC403

R481

R480

C406

R401

K A

VDR102

L410

L401

C412

R413

R484

R465

VDR202

FB403

C312

Q405

L402

Q415

R463

Q406

R428

R437

R416

C444

L411+

Q416E

1 R483

R432

C417

D405

C445

R414

R415

C403

RECHARGEABLE

C468

BATTERY

C425

L403

L404

R421

NC-6WM

C409

R454

2B E 1B IC402

R439

R444

2PSC. 2.4V

R420

R441 C416

C465

R455 R460

R461

C443

C469

Q422

C439

C418

R448

R488

R446

C432

C466

R436

C429

C434

C431

Q421

L405

R443

R442

R447

R450

C426

C433

R422

C421

R424

C437

R445

R449

C436

1-682-611-

C423

R423

R459

C438

C442

D404

R426

R425

D401

VDR401

(11)

S804

R429

C405

C435

E C B

OPEN

R452

1-682-611-

R457 R456

Q407

(11)

+ 30 hidden pages

Sony D-EJ855 Service Manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

DISASSEMBLY

3-1. DISASSEMBLY FLOW

3-2. UPPER LID (M) SUB ASSY

4 cabinet (upper) sub assy

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

ELECTRICAL CHECK

DIAGRAMS

BLOCK DIAGRAM – MAIN Section (1/2) –

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