Sony DSJ-301 Service manual

D-SJ301

SERVICE MANUAL

Ver 1.2 2004. 04

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

40 - 20 000 Hz

Output (at 4.5 V input level)

Headphones (stereo minijack) Approx. 5 mW + Approx. 5 mW at 16 Ω

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): US, CND model:120 V, 60 Hz AEP, FR, E model: 220 - 230 V, 50/60 Hz UK model: 230-240V, 50Hz AUS model: 240 V, 50 Hz

dB (measured by JEITA CP-307)

-4.5

Battery life* (approx. hours)

(When you use the CD player on a flat and stable surface.) Playing time varies depending on how the CD player is used.

When using G-PROTECTION function

NH-WM2AA 30 32 (charged for about 5 hours**) Two Sony alkaline 47 50 batteries LR6(SG) (produced in Japan)

* 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.

Operating temperature

5°C - 35°C (41°F - 95°F)

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

Approx. 133.9 × 38.1 × 147.5 mm (5 3 ⁄ 8 × 1 1⁄

Mass (excluding accessories)

Approx. 305 g (10.8 oz.)

Design and specifications are subject to change without notice.

× 5

⁄ 8 in.)

Model Name Using Similar Mechanism D-E350 CD Mechanism Type CDM-3125ER Optical Pick-up Type DAX-25E

1 2

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Accessories 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 (1) Hand strap (1)

• Abbreviation CND : Canadian AUS : Australian FR : French

9-873-647-03

PORTABLE CD PLAYER

Sony Corporation

Personal Audio Company Published by Sony Engineering Corporation

D-SJ301

TABLE OF CONTENTS

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.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the rear exterior.

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. “Lid, Upper”, Cabinet (Front) .................................... 4

3-2. MD ASSY, Main Board ............................................. 4

3-3. “Motor ASSY, Turn Table (Spindle) (M901)”............ 5

3-4. “Motor ASSY (Sled) (M902)”,

Optical Pick-up (DAX-25E) ...................................... 5

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

5. DIAGRAMS

5-1. Explanation of IC Terminals....................................... 7

5-2. Block Diagram...........................................................11

5-3. Printed Wiring Boards –MAIN SECTION (1/2)–.... 12

5-4. Printed Wiring Boards –MAIN SECTION (2/2)–.... 13

5-5. Schematic Diagram –MAIN SECTION (1/3)– ....... 14

5-6. Schematic Diagram –MAIN SECTION (2/3)– ....... 15

5-7. Schematic Diagram –MAIN SECTION (3/3)– ....... 16

5-8. IC Block Diagram..................................................... 17

6. EXPLODED VIEWS

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

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

6-3. Optical pick-up Section (CDM-3125ER) ................. 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

LES COMPOSANTS IDENTIFIÉS P AR 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.

À LA SÉCURITÉ!

SECTION 1

SERVICING NOTES

D-SJ301

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 0.65Vp-p

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

LOCA TING THE CONTROLS

CD player (front)

1 HOLD switch

2 3-way control key

3 VOL (volume)

control

4 DC IN 4.5 V

(external power input) jack

Fig.1 Method to push S801

SECTION 2

GENERAL

6 PLAYMODE button

7 REPEAT/ENTER button

8 SOUND button

9 i (headphones)

jack

This section is extracted from instruction manual.

5 Display

3-way control key

Pushtoward

N/> OR ..

Pressx /CHG.

N/>: Play/AMS/search

.: AMS/search x/CHG: stop/charge

q; Buckle

CD player (inside)

qa G-PROTECTION

switch

qs Battery

compartment

D-SJ301

DISASSEMBLY

The equipment can be removed using the following procedure.

SECTION 3

MD ASSY “Moter ASSY, turn table (spindle) (M901)”

“Moter ASSY (Sled) (M902)”, Optical pick-up (DAX-25E),

Set

“Lid, Upper”, Cabinet (front)

Main board

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

3-1. “LID, UPPER”, CABINET (FRONT)

3 Five screws (B2)

1 Screws

Cabinet (front)

Lid, upper

3-2. MD ASSY, MAIN BOARD

Cabinet (lower) sub ASSY

3 CN502 (white)

RV301

1 Screws

5 Flexible cable (24P)

MD ASSY

2 CN503 (black)

Main board

• Note ON DURING ASSEMBLY Align RV301 and Lever (VOL) (B).

LEVER (VOL) (B)

Cabinet (lower) sub ASSY

3-3. “MO TOR ASSY, TURN T ABLE

(SPINDLE) (M901)”

D-SJ301

1 Three screws (B1.7x5)

Motor ASSY, Turn tabl (Spindle) (M901)

3-4. “MO TOR ASSY (SLED) (M902)”, OPTICAL PICK-UP (DAX-25E)

Screw ASSY, Feed

Cover, Gear

Chassis

1 Screw (B 1.7x5)

Gear B

Motor ASSY (Sled) (M902)

4 Screw

(P 1.4x3.5)

Bracket (Shaft)

Optical pick-up

Chassis

(DAX-25E)

D-SJ301

C632

L606

4R4

120

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 B)

IC601

R641

607 613

C608

X601

R625

C627

C613

R616

R602

C601

R601

C602

C619

C618

R623

R622

R621

R619

C615

R618

R620

TAP403

C617

C630

C616

R624

C620 R627

R632

C631

C629

R633

R631

TP630(RF)

R637

R635

Procedure:

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

2. Set a disc. (YEDS-18)

3. Press the >B 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 0.65 Vp-

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.

SECTION 5

DIAGRAMS

5-1. EXPLANATION OF IC TERMINALS

IC601 CXD3029R (SYSTEM CONTROL)

Pin No. Pin name I/O Description

1 XRAM O DRAM low address strobe signal outut. 2 XWE O DRAM data input enable signal output.

3 to 6 D0 to 3 I/O DRAM data bus 0-3.

7 DCLK O Not used (OPEN). 8 DCKE O Not used (OPEN). 9 XCAS O DRAM column address storobe signal output.

10 WFCK O Not used (OPEN).

11 to 13 A7 to 9 O DRAM address 7 – 9.

14 DVss – Ground terminal for DRAM interface.

15 to 17 A4 to 6 O DRAM addres 4 – 6.

18 XRDE I/O Not used (OPEN). 19 VDD0–Power supply for digital. 20 CLOCK I Serial data transfer clock input. 21 SDTO I Serial data input. 22 SENS O SENS output. 23 XLAT I Latch input. 24 XSOE I CPU serial data output enable signal input. 25 SYSM I Mute input. “H” : MUTE 26 WDCK O Word clock output. 27 SCOR O SCOR output. 28 XRST I Reset terminal. 29 PWMI I Spindle moter external control input. 30 XQOK I/O Not used (OPEN). 31 XWRE I/O Not used (Fixed at “L”). 32 R4M O System clock output. 33 Vss0 – Digital ground terminal. 34 SQCK I Not used (Fixed at “H”). 35 SCLK I Not used (Fixed at “H”). 36 SQSO O Not used (OPEN). 37 XEMP O Not used (OPEN). 38 XWIH O Not used (OPEN). 39 SBSO O Not used (OPEN). 40 EXCK I Not used (Fixed at “L”). 41 XTSL I Not used (Fixed at “L”). 42 HVss – Ground terminal for headphones. 43 HPL O Not used (OPEN). 44 HPR O Not used (OPEN). 45 HVDD – Power supply terminal for headphones. 46 XVDD – Power supply terminal for master clock. 47 XTAI I Master clock input (16.9MHz). 48 XTAO O Master clock output (16.9MHz). 49 XVss – Ground terminal for master clock. 50 AVDD1–Power supply terminal for DAC block. 51 AOUT1 O Audio out (L-CH). 52 VREFL O VREF terminal (L-CH). 53 AVss1 – Ground terminal DAC block. 54 AVss2 – Ground terminal DAC block.

D-SJ301

Pin No. Pin name I/O Description

55 VREFR O VREF terminal(R-CH). 56 AOUT2 O Audio out (R-CH). 57 AVDD2–Power supply terminal for DAC block. 58 TEST1 I Not used (Fixed at “L”). 59 TEST I Not used (Fixed at “L”).. 60 Vss1 – Not used (Fixed at “L”). 61 LRMU O OR output of L-CH/R-CH detection flag (AND output) and system flag. 62 DOUT O Not used (OPEN) 63 ATSK I/O Not used (OPEN). 64 DFCT I/O Not used (OPEN). 65 FOK I/O Focus OK signal I/O teminal. 66 MIRR I/O Not used (OPEN). 67 COUT I/O Not used (OPEN). 68 C2PO O Not used (OPEN). 69 GFS O Not used (OPEN). 70 XUGF O Not used (OPEN). 71 XPCK O Not used (OPEN). 72 VDD1–Power supply terminal for digital. 73 PCO O Charge pump output for master PLL. 74 FILI I Filter input for master PLL. 75 FILO O Filter output for master PLL. 76 CLTV I VC01 contorol voltage input. 77 VCTL I VC02 contorol voltage input for wide range EFM PLL. 78 VPCO O Charge pump output for wide range EFM PLL. 79 AVDD 3–Ground terminal for analog (servo block). 80 ASYO O EMF fullswing output. 81 ASYI I Asymmetric comparate voltage input. 82 BIAS I Asymmetric circuit current constrant input. 83 AVDD3–Power supply terminal for analog (servo block). 84 RFAC I EFM signal input. 85 AVDD0–Power supply terminal for analog (servo block). 86 IGEN I Current constant input for OP amplifier. 87 AVss0 – Ground terminal for analog (servo block). 88 RFDC I RF signal input. 89 CE I E signal input. 90 TE I F signal input. 91 SE I B signal input. 92 FE I A signal input. 93 VC I Center voltage input. 94 Vss2 – Digital ground terminal. 95 FRDR O Focus drive output. 96 FFDR O Focus drive output. 97 TRDR O Traking drive output. 98 TFDR O Traking drive output.

99 SRDR O Sled drive output. 100 SFDR O Sled drive output. 101 SSTP I Most inside disc detection signal input (Fixed at “L”). 102 MDS O Spindle drive output. 103 MDP O Servo contorol output for spindle moter. 104 C176 O 176.44kHz output.

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