ON Semiconductor D EJ250 Service Manual

D-EJ250

SERVICE MANUAL

Ver 1.2 2004. 04

Canadian Model

AEP Model

UK Model

E Model

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

• Two Sony NH-7WMAA rechargeable batteries: 1.2 V DC x 2

• Two LR6 (size AA) batteries: 1.5 V DC x 2

• AC power adaptor (DC IN 4.5 V jack): 100-240 V, 50/60 Hz

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

Approx. 135.8 x 22.6 x 135.8 mm (5 3⁄8 x 29⁄32 x 5 3⁄8 in.)

Mass (excluding accessories)

Approx. 182 g (6.5 oz)

Operating temperature

5°C - 35°C (41°F - 95°F)

Design and specifications are subject to change without notice.

Supplied Accessories

AC power adaptor (1) Headphones/earphones with remote control (1)

Note on the remote control

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

9-961-979-03

PORTABLE CD PLAYER

Sony Corporation

Parsonal Audio Company Published by Sony Engineering Corporation

D-EJ250

Ver 1.2

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.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size.)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

•Unleaded solder melts at a temperature about 40°C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350°C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful!

• Strong viscosity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

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

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

2. GENERAL

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

3. DISASSEMBLY

3-1. Upper Lid ASSY, Cabinet (Upper) Sub ASSY,

Cabinet (Lower) ASSY ................................................... 4

3-2. MD ASSY (CDM-3325ER), Main Board ....................... 5

3-3. Motor ASSY (Sled) (M902),

Optical Pick-up (DAX-25E),

Turn Table Motor ASSY(Spindle) (M901) ..................... 6

4. ELECTRICAL ADJUSTMENS ..........................7

5. DIAGRAMS

5-1. Block Diagram ................................................................ 8

5-2. Printed Wiring Boards –MAIN Section (Side A)– ..........9

Printed Wiring Boards –MAIN Section (Side B)– .......... 10

5-3. Schematic Diagram –MAIN SECTION (1/3)– .............. 11

5-4. Schematic Diagram –MAIN SECTION (2/3)– .............. 12

5-5. Schematic Diagram –MAIN SECTION (3/3)– .............. 13

5-6. IC Pin Function Description ............................................ 16

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 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 IDENTIFÉS 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 PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

D-EJ250

DISASSEMBLY

The equipment can be removed using the following procedure.

Upper lid ASSY, Cabinet (upper) ASSY

SECTION 3

Set

MD ASSY Motor ASSY (Sled) (M902), Optical pick-up (DAX-25E),

Cabinet (lower) ASSY

Turn table motor ASSY(spindle) (M901)

Main board

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

3-1. UPPER LID ASSY, CABINET (UPPER) ASSY, CABINET (LOWER) ASSY

tow screws

upper lid assy

five screws

cabinet (upper) assy

claw

CN802

cabinet (lower) ass

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-EJ250

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 S809(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 S809 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.

S809

LOCATING THE CONTROLS

CD player (front)

1 P MODE/

2 DI SPL AY/ MENU

3 u *

i (headphones)/LINE OUT jack

*The button has a tactile dot.

OPEN

SECTION 2

GENERAL

4 HOLD (rear)

Fig.1 Method to push S809

This section is extracted from instruction manual.

Display

5 x/CHG

Strap hole

6 SOUND

7 ./>

DC IN 4.5 V (external power input) jack

8 VOL +*/–

CD player (inside)

Open the battery compartment lid.

Insert the # end first (for both batteries).

3-2. MD ASSY (CDM-3325ER), MAIN BOARD

)

D-EJ250

CN401

CN501

CN402

MD assy (CDM-3325ER

MAIN board

HOW TO SET THE HARNESS IN ASSEMBLING

CN401

CN402

harness

D-EJ250

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

three screws

(B1.7x4)

gear cover

three screws

(B1.7x4)

motor assy

(sled) (M902)

optical pick-u

(DAX-25E)

turn table motor assy

(spindle) (M901)

chassis

SECTION 4

)

ELECTRICAL ADJUSTMENTS

D-EJ250

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)

[MAIN BOARD] (SIDE B)

D304

ECB

Q301

C301

C302

R316

D308

R602

C304

C206

C317

C106

R604

R650

R603

TP601(RF)

CN601

R605

TP601

(RF)

301

C307

Procedure:

1. Connect the oscilloscope to the test point TP601(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.

D-EJ250

5-1. BLOCK DIAGRAM

SECTION 5 DIAGRAMS

IC603

D-RAM(16M)

OPTICAL PICK-UP

BLOCK

(DAX-25E)

OP IC

OPGSW

VCC

OPSTB

A B E

VCC1_2.2V

DRIVER

Q601

VCC1_2.2V

D0-3 A0-10

2,3,24,25 9-12,15-19,21,8

16 17

DETI

RFGO

RFI

VMON

APC

AMP

A/D

DEMODULATOR

87,88,84,85 97-100,96-91,82

D0-D3

EFM

SERVO

PWM

FDOP

FDON

TDOP

TDON

75 74 77 76 79 78 72 73 71 504947533738

FIN-

TIN-

FIN+

TIN+

SDOP

SIN-

SDON

SIN+

PROCESSOR

CLVON

CPOL

A0-A10

SUB CODE

CLVOP

CLKDRV

SYNC

CLVOP

XRAS

XCAS

5 23 4

90 83 89

XCAS

XRAS

CLOCK

OSC

XOUT

X601

16.934MHz

XWE

XIN

XWE

XRST

CLK4M

SCLK

DIGITAL SIGNAL PROCESSOR

D-RAM CONTROLLER

SIO

SDIN

SDOUT

IC601

RF AMP,SERVO

D/A CONVERTER

POFF

SRW_I

SCOR

XBUSY_O

DEFDCT_O

GFS

DAC

657064524345

6711371177

FO_O

IC302

HEADPHONE AMP

LDACO LOUT

RDACO

DVDDIO

VCC2_2.0V

86 34

AVDD2 2.25V

DVDDV 1.5V

MUTE

D305

Q301

D304

VCHK

40 51

VCC1_2.2V

VCPU_1.5V

D308

DELAY

LIN

RIN

MUTE

BEEP8VCC110VCC2

161

ROUT

+V BAT

+B SWITCH

Q302,303

1429

VCPU_1.5V

VCC2_2.0V

VCC1_2.2V

VCPU_2.0V

D407

J302

/ LINE OUT

VCC2

VCC3

VCC1

VCPU 2.0V

IC403 (2/2)

POWER CONTROL

VCC0

SEM

SEO

VCC

Q406

20 16

FOCUS

COIL

TRACKING

COIL

M902

SLED

MOTOR

M901

SPINDLE

MOTOR

GFS_I

IC403 (1/2)

FOCUS/TRACKING COIL DRIVE SLED/SPINDLE MOTOR DRIVE

FIN3

FIN+

F+

F-

T+

T-

S+

S-

+VBAT

L403

6 4 2

53 49 45 41

1 5

FO3

RO3

FO2

RO2

FO1

RO1

W V U COMCOM

VM1 VM12 VM23 VM3

SPVCC1 SPVCC2

CH3

BRIDGE

CH2

BRIDGE

CH1

BRIDGE

CH4

BRIDGE

LEVEL

SHIFTER

LEVEL

SHIFTER

I/F

RIN3

FIN1

RIN1

FIN2

RIN2

BRK

PWM

SYNC

LATCH

DATA

CLOXK

WAKEUP

RESET_O

XRST

FIN-

SIN+

SIN-

TIN+

TIN-

CPOL

SLVOP

SYNC

40 39 38 37

VCC2_

2.0V

DEFFERENTIAL

Q407

VCPU_2.0V

CLK4M

RESET2

PGM_SEL PGM_SCK PGM_SDTI PGM_SDTO RESET2

TEST CLK4M

D802

1 2

3 4

7 9

SRW_O

POFF_O

XIN

OPGSW_O

XOPSTBY_O

< PGMSEL_O >/SC_SEL_O

PGM_SCK_O

PGM_SDTI_I

PGM_SDTO_O

TEST

FG I

XPOWLT_O

SDTI_I

SDTO_O

SCK_O

XWAKEUP_O

XREST_I

XRST_O

56-42 60-57

CN801

TEST CONNECTOR

SEG0

SCOR_I

XBUSY_I

SEG14

LCD801

LIQUID

CRYSTAL

DISPLAY

DEFECT_I

COM0

COM3

FOK_I

KEY MATRIX

S1005

S1007

AMUTE_O

IC801

SYSTEM

CONTROL

MICOM

WP/AD_KEY_1

AD_KEY_2

2523 28 40

S1001

S1004

WP/XOPEN

S809

(OPEN)

HOLD_I

S810

HOLD

OFF ON

BEEP_O

AD_CHGMNT

WP/AD_RMKEY

AD_BATMNT

WP/AD_DCINMNT

VOL+_IN

S802 VOL+

VOL-_IN

S803 VOL-

HPSW_O

22 24 66

AVCPU

ADVREF

VCPU_2.0V

Q401

CHARGE

SWITCH

61 62 63

+VBAT

CHGMNT VMMNT DCIN

REGB DET CHGB

D405

SWITCH

Q402, 403

STNG

L404

VIN

BATM1 BATM2

DCIN_S

D402

L401

L402

• Signal path.

E : CD PLAY

Q404

DRY BATTERY

SIZE "AA"

(IEC DESIGNATION LR6)

2PCS, 3V

J401

DC IN 4.5V

+ 18 hidden pages

ON Semiconductor D EJ250 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SPECIFICATIONS

TABLE OF CONTENTS

DISASSEMBLY

3-1. UPPER LID ASSY, CABINET (UPPER) ASSY, CABINET (LOWER) ASSY

SERVICING NOTES

GENERAL

3-2. MD ASSY (CDM-3325ER), MAIN BOARD

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

ELECTRICAL ADJUSTMENTS

5-1. BLOCK DIAGRAM