SONY DES51 - Service Manual Immediate Download

MICROFILM

SERVICE MANUAL

COMPACT DISC COMPACT PLAYER

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

SPECIFICATIONS

D-ES51/ES55

Photo: D-ES55

Model Name Using Similar Mechanism

NEW

CD Mechanism Type

CDM-2801AAA

Optical Pick-Up Name

DAX-01A2

System

Compact disc digital audio system

Laser diode properties

Material: GaAlAs

Wavelength:

= 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 optial pick-up block with 7 mm

aperture.)

Error correction

Sony Super Strategy Cross Interleave Reed Solomon Code

D-A conversion

1-bit quartz time-axis control

Frequency response

20 20,000 Hz

dB (measured by EIAJ CP-307)

Output (at 4.5 V input level)

Headphones (stereo minijack)

15 mW + 15 mW at 16 ohms

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 BP-DM10 Rechargeable battery:

2.4 V DC, Ni-Cd, 650 mAh

· Two LR6 (size AA) batteries: 3 V DC

· AC power adaptor (DC IN 4.5 V jack):

US, Canadian, E92 model: 120 V, 60 Hz

AEP, French, E13 model: 220 230 V, 50/60 Hz

UK model: 230 240 V, 50 Hz

Australian model: 240 V, 50 Hz

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

Approx. 138.3

× 34.3 × 145.8 mm

(51/2

× 13/8 × 53/4 in.)

Mass (without rechargeable batteries)

Approx. 312 g (11.1oz)

Operating temperature

5°C 35°C (41°F 95°F)

-- Continued on next page --

Ver 1.1 1998. 07

Flexible Circuit Board Repairing

· Keep the temperature of the soldering iron around 270 °C dur-

ing 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.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE

SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE

DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ

DE FONCTIONNEMENT. NE REMPLACER CES COM-

POSANTS QUE PAR DES PIÈCES SONY DONT LES

NUMÉROS SONT DONNÉS DANS CE MANUEL OU

DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK

! OR DOTTED

LINE WITH MARK

! 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 PUB-

LISHED BY SONY.

CAUTION

Use of controls or adjustments or performance of procedures

other than those specified herein may result in hazardous ra-

diation exposure.

This appliance is classified as a CLASS 1 LASER product.

The CLASS 1 LASER PRODUCT MARKING is located on

the rear exterior.

Supplied accessories

For the area code of the model you purchased, check the upper left side

of the bar code on the package.

D-ES51

AC power adaptor (1)

AC plug adaptor (1)*

Stereo headphones (1)

* Supplied with E13 model

D-ES55

AC power adaptor (1)

AC plug adaptor (1)*

Stereo headphones (1)

Rechargeable batteries (1)**

* Supplied with E13 model

**Supplied with US model only

Design and specifications are subject to change without notice.

· Abbreviation

E13: 220 230 V AC area

E92: 120 V AC area

TABLE OF CONTENTS

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

GENERAL ................................................................... 4

DISASSEMBLY ......................................................... 7

SERVICE MODE ...................................................... 10

ELECTRICAL ADJUSTMENTS ......................... 11

DIAGRAMS

6-1. Block Diagram ................................................................ 13

6-2. Printed Wiring Boards .................................................... 17

6-3. Schematic Diagram ......................................................... 21

6-4. IC Pin Function Description ........................................... 33

EXPLODED VIEWS ................................................ 35

ELECTRICAL PARTS LIST ............................... 38

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 electro-

static 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 emis-

sion, observe from more than 30 cm away from the objective lens.

Befor Replacing the Optical Pick-Up Block

Please be sure to check thoroughly the parameters as par the "Op-

tical 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: IC501 !TM pin

When checking FOK, remov the lead wire to disc motor.

· S curve P-to-P value: 0.6 - 1.8 Vp-p IC501 #¡ pin

When checking S curve P-to-P value, remove the lead wire to

disc motor.

· RF signal P-to-P value: 0.8 - 1.2 Vp-p

· Traverse signal P-to-P value: 1.2 Vp-p

· The repairing grating holder is impossible.

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 panel is closed while turning

ON the S801 (push switch type).

The following two checking methods for the laser diode are oper-

able.

· Method (In the service mode or normal operation):

Emission of the laser diode is visually checked.

1. Open the upper lid.

2. Push the S801 as shown in Fig. 1.

3. Press the

^ key.

4. 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.

Fig. 1 Method to push the S801

S801

SECTION 2

GENERAL

This section is extracted from

instruction manual.