Sony DFS-18 Service manual

D-FS18

SERVICE MANUAL

Ver. 1.1 2005.07

SPECIFICATIONS

CD player

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

307)

Output (at 4.5 V input level)

Headphones (stereo minijack)

Approx. 5 mW + Approx. 5 mW at 16 Ω

+1–4

dB (measured by EIAJ CP-

Radio

Frequency range (STEP switch)

9 kHz step:

FM: 87.5 - 108.0 MHz AM: 531 - 1 710 kHz

10 kHz step:

FM: 87.5 - 108.0 MHz AM: 530 - 1 710 kHz

Antenna

FM: Headphones cord antenna AM: Built-in ferrite bar antenna

General

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): U2/U/CA2/E92/MX2/TW2/BR3 model: 120 V, 60 Hz CED/CET/CEW/CEX/CE7/EE/EE1/E13/G5/ G6/G7/G8/BR1 model: 220 - 230 V, 50/60 Hz CEK/3CE7 model: 230 - 240 V, 50 Hz AU2 model: 240 V, 50 Hz JE.W/E33/EA3 model: 100 - 240 V, 50/60 Hz HK2 model: 220 V, 50/60 Hz AR1/CNA model: 220 V, 50 Hz

• Sony DCC-E345 car battery cord for use on car battery: 4.5 V DC

US Model

Canadian Model

Model Name Using Similar Mechanism D-E770/EJ711/EJ715 CD Mechanism Type CDM-3123EBA Optical Pick-up Type DAX-23E

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 Radio

NH-WM2AA 18 21 38 (charged for about 5 hours**)

Two Sony alkaline 31 35 66 batteries LR6(SG)

*Measured value by the standard of EIAJ

(Electronic Industries Association of Japan).

** 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. 146 × 38 × 136 mm

3

⁄4 × 1 1⁄2 × 5

(5

Mass (excluding accessories)

Approx. 363 g (12.9 oz.)

on off on

3

⁄8 in.)

— Continued on next page —

9-873-122-12

FM/AM PORTABLE CD PLAYER

Sony Corporation

Personal Audio Group Published by Sony Engineering Corporation

D-FS18

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)

For US customers

The AC power adaptor supplied is not intended to be serviced. Should the AC power adaptor cease to function in its intended manner, during the warranty period, the adaptor should be returned to your nearest Sony Service Center or Sony Authorized Repair Center for replacement, or after warranty period, it should be discarded.

Optional accessories

AC power adaptor AC-E45HG Active speaker system SRS-Z500

SRS-T1 Car battery cord DCC-E345 Car battery cord with car connecting pack

DCC-E34CP Car connecting pack CPA-9C Connecting cord RK-G129

RK-G136 Rechargeable battery NH-WM2AA Earphones MDR-E848LP

MDR-EX70LP Headphones MDR-A44L

MDR-A110LP

Your dealer may not handle some of the above listed accessories. Please ask the dealer for detailed information about the accessories in your country.

Cabinet (Inner) Sub Assy, Main Board ································ 5 3-2. MD ASSY············································································ 5 3-3. Motor ASSY, Turn Table (Spindle) (M902) ························ 6 3-4. Optical Pick-up (DAX-23E),

Motor Assy (Sled) (M901) ···········································6 3-5. “Lid, Upper”, Switch Unit ···················································7

4. ELECTRICAL ADJUSTMENS ···································· 8

5. DIAGRAMS

5-1. BLOCK DIAGRAM CD SECTION ······························· 10

TUNER SECTION ···························································· 11 5-2. PRINTED WIRING BOARD

MAIN (SIDE A) SECTION ·········································12 5-3. PRINTED WIRING BOARD

MAIN (SIDE B) SECTION ········································· 13 5-4. SCHEMATIC DIAGRAM TUNER SECTION ··············14 5-5. SCHEMATIC DIAGRAM CD SECTION (1/4) ·············15 5-6. SCHEMATIC DIAGRAM CD SECTION (2/4) ·············16 5-7. SCHEMATIC DIAGRAM CD SECTION (3/4) ·············17 5-8. SCHEMATIC DIAGRAM CD SECTION (4/4) ·············18 5-9. IC PIN FUNCTION DESCRIOTION ······························· 19 5-10.IC BLOCK DIAGRAMS ·················································· 23

6. EXPLODED VIEWS

6-1. CABINET SECTION ························································ 26 6-2. MECHANISM SECTION (CDM-3123EBA)··················· 27

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

• K eep 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 dam-

aged by heat.

7. ELECTRICAL PARTS LIST········································· 28

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 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.

2

SECTION 1

MAIN board

S801

SERVICING NOTES

D-FS18

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 re pair, 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 objectiv e 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 pickup 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 eg pin When checking FOK, remove the lead wire to disc motor.

• RF signal P-to-P value : 0.4 to 0.5Vp-p

Precautions for Checking Emission of Laser Diode

Laser light of the equipment is focused by the object lens in the optical pick-up so that the light focuses on the reflection surface of the disc. Therefore, be sure to keep your eyes more then 30 cm apart from the object lens when you check the emission of laser diode.

Laser Diode Checking Methods

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

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

1. Open the upper lid.

2. W ith a disc not set, turn on the S801 with a scre wdriv er having a thin tip

as shown in Fig.1.

Note: Do not push the detection lever strongly , or it may be bent or dam-

aged.

3. Press the u 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 do wn 5 times along with inward motion for the focus search.

Fig.1 Method to push S801

3

D-FS18

CD player (front)

SECTION 2

GENERAL

This section is extracted from instruction manual.

1 SOUND button

2 PLAY MODE•

TUNING + button

3 REPEAT/ENTER•

TUNING – button

4 RADIO ON•BAND

button

5 VOL(volume)

control

6 i(headphones)

jack

7 Buckle

8 1-5buttons

9 u (play/pause)

button

q; x (stop)/CHG (charge)•

RADIO OFF button

qa ./>

(AMS/search) • PRESET –/+ buttons

qs HOLD switch

qd DC IN 4.5 V

(external power input) jack

qf Display

4

DISASSEMBLY

)

z

The equipment can be removed using the following procedure.

D-FS18

SECTION 3

Set

Cabinet (lower) sub ASSY, Cabinet (inner) sub ASSY, Main board MD ASSY

Cabinet (front)

“Lid, Upper”, Switch unit

Motor ASSY, Turn table (Spindle) (M902), Optical pick-up (DAX-23E), Motor ASSY (Sled) (M901

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

3-1. CABINET (LOWER) SUB ASSY, CABINET (INNER) SUB ASSY, MAIN BOARD

Five screws (B2)

5

6

Claws

7

MAIN board

9

Cabinet (Inner) sub assy

Lid, Upper

3-2. MD ASSY

2

Screw, tapping

CN502 (Green)

2

CN503 (White)

1

3

Optical pick-up flexible board

3

Screw, (B2)

2

Screw, tapping

MD ASSY

8

4

Switching arm assy

1

Screw, step

Main board

Flexible board (CN801)

4

5

D-FS18

3-3. MOTOR ASSY, TURN TABLE (SPINDLE) (M902)

1

Screws

(B1.7x5)

2

Chassis

3-4. OPTICAL PICK-UP (DAX-23E), MOTOR ASSY (SLED) (M901)

Screw (B 1.7x5)

1

Cover, Gear

Screw (feed) assy

Gear B

Motor ASSY, Turn tabl (Spindle) (M902)

Motor ASSY (Sled) (M901)

2

5

3

Chassis

4

Screw

(P 1.4x3.5)

Bracket (Shaft)

6

Optical pick-up (DAX-23E)

6

3-5. “LID, UPPER”, SWITCH UNIT

4

2

Lid, Upper

Switch unit

5

Cover, Lid

3

D-FS18

Five screws (B 1.7

1

×

3.5)

7

D-FS18

)

SECTION 4

ELECTRICAL ADJUSTMENTS

CD SECTION

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 : Minimum AVLS : NORM HOLD : OFF

Focus bias Check

Condition:

• Hold the set in horizontal state.

• Terminate TAP802 (open) by solder.

Connection:

Oscilloscope

(AC range)

2 K Ω

TJ635 (GND)

[MAIN BOARD] (Side B)

TJ629 (RF)

Procedure:

1. Connect the oscilloscope to the test points TJ629 (RF) and TJ635 (GND) 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 0.5 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.

8

N

r

SECTION 5

DIAGRAMS

D-FS18

TUNER SECTION

• Switch Location VOLUME : MAX MEGA BASS : OFF AVLS : NORMAL

[AM]

BAND: AM

AM RF signal generator

30% amplitude modulation by 400Hz signal. Output level : as low as possible

[FM]

BAND : FM

FM RF signal generator

75kHz(100%) amplitude modulation by 1kHz signal. Output level: as low as possible

set

16 Ω

i jack (J302)

Put the lead-wire antenna close to the set.

0.01µF FM I

point

level mete

0 dB = 1 µV

• Repeat the procedures in each adjustment several times for the maximum level meter indication.

• The frequency coverage and tracking adjustments should be finally done by the trimmer capacitors.

AM IF ADJUSTMENT