Sony d eq 550 service manual

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D-E0550

SERVICE MANUAL

Ver 1.0 2002.02

US Model
Canadian Model
AEP Model

E Model

Model Name Using Similar Mechanism D-E350
MD Mechanism Type CDM-3125EFI
Optical Pick-up Mechanism Type BAX-25E

SPECIFICATIONS

System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: 7» = 780 ntn
Em' ion duration: Continuous
Laser output: Less than 44.6 11W (This output is the Value measured
at a distance of 200mm from the objective lens surface on the optical
pick-up block with 7 min aperture.)
Error correction
Sony Super Strategy Cross Interleave Reed
Solomon Code
D-A conversion
l-bit quartz time-axis control
Frequency response
20 - 20 000 Hz 3 dB (measured by JEITA CP-307)
Output (at 4.5 V input level)
Headphones (stereo minijack)
Approx. 10 mW + approx. 10 mW at 16 9
(Approx. 1 mW + approx. 1 mW at 16 Q *)
* For the customers in France
Power requirements
For the area code of the model you purchased, check the upper left
side of the bar code on the package.
- Two LR6 (size AA) batteries: 3 V DC
- AC power adaptor (DC IN 4.5 V jack):
US, CND models: 120 V, 60 Hz
AEP, FR, EE. E models: 220 - 230 V, 50/60 Hz

9-873-599-01 Sony Corporation
2002805004 Personal Audio Company
© 2002.02 Published by Sony Engineering Corporation

Dimensions (w/hld) (without projecting parts and controls)
Approx. 130.6 X 29.8 X 150.5 mm
(5 '/4>< 13/, x6 in.)
Mass (excluding accessories)
Approx. 210 g (7.5 oz)
Operating temperature
5°C - 35°C (41°F - 95°F)
Supplied accessories
For the area code of the model you purchased, check the upper left
side of the bar code on the package.
Headphones (1)
Lid cover (1)
Headphones caps (1 pair)

Design and specifications are subject to change without notice.

Abbreviation

CND : Canadian model

EE : East European model
FR : French model

PORTABLE co PLAYER
S O NY®

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D-EQ550

5-3.
5-4.
575.
576.
57.

TABLE OF CONTENTS On the AC power adaptor

' Use only the supplied AC power adaptor. If your player is not
supplied with it, use AC»E45HG AC power adaptor. Do not use

SERVICING NOTES ................................................ 3 any other AC power adaptor.
GENERAL
Locating the Controls ...................................................... 3

Polarity of the plug g S, Q
DISASSEMBLY

Disassembly Flow ..............

Cabinet (Lower), MD ASSY

Main Board .........................

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

Optical PiCkUP (DAXQSE) ------------------------------------------- 6 Invisible laser radiation when open and interlock failed or defeated.
Avoid direct exposure to beam.

ELECTRICAL ADJUSTMENTS .......................... 7

CAUTION
DIAGRAMS Use of controls or adjustments or performance of procedures other
Block Diagram ______________________ 8 than those specified herein may result in hazardous radiation
Note for Printed Wiring Board and exposure.

Schematic Diagrams
Printed Wiring Board
Schematic Diagram 7 MAIN Section (1/3)
Schematic Diagram iMAIN Section (2/3) .. This Compact Disc player is
Schematic Diagram 7 MAIN Section (3/3) .. CLASS1 LASER PRODUCT classified as aCLASS 1 LASER
IC Pin Function Description ..................... .. LUOKAN 1 LASERLAlTE product.

KLASS1 LASERAPPARAT The CLASS 1 LASER
PRODUCT label is located on
the rear exterior.

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

EXPLODED VIEWS

Cabinet Section ......................................

Optical Pickeup Section (CDM-3125ER .. Flex'b'e c'rcu't 3 Repa'r'"9

' 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.

ELECTRICAL PARTS LIST ..

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.

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK A OR DOTTED LINE
WITH MARK A 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
A LA SECURITE!

LES COMPOSANTS IDENTIFIES PAR UNE MARQUE A SUR LES
DIAGRAMMES SCHEMATIQUES ET LA LISTE DES PIECES
SONT CRITIQUES POUR LA SECURITE DE FONCTIONNEMENT.
NE REMPLACER CES COMPOSANTS QUE PAR DES PIECES
SONY DONT LES NUMEROS SONT DONNES DANS CE MANUEL
0U DANS LES SUPPLEMENTS PUBLIES PAR SONY.