Sony cdx a 55 service manual

Page 1

CDX-A55

SERVICE MANUAL

US Model
Canadian Model
AEP Model

E Model

UK Model

Model Name Using Similar Mechanism CDX-USOO
SPECIFICATIONS
System Compact disc digital audio system Systeme Audionuménque pour disque

Laser diode properties
Material, GaAIAs
Wavelength: 780 nm
Emission duration. Contlnuous
Laser output power: Less than
44.6 uw»
'This output IS the value
measured at a distance 0! 200
mm lrom the omective lens
surtace on the Optical Pickup
Block
Frequency response
5 .7 20,000 Hz :1 (18
Wow and llutter Below measurable Ilmil
Signaleto-noise ratio

Outputs Line Oulpu! (tor changer connector
Only)
800 mA (CD playback)
800 mA (during loadan or Ejecllllg
a disc)
Operating temperature

vl0°C IO 55°C (14°F to 81°F)

Current drain

Dimensrons Approx 305 x 58 x177 mm (wlhld)
(12W; x 3V2 x 7 In.)
not incl, proiecting parts and
controls
Weight Approx 2.5 kg (5 lb 8 02.)

Power requirement
12 v Dc car battery
(negative ground)
Supplied accessories
Disc magazme (1)
Mounting hardware (t set)
Connecting cable (1)
Optional accessories
Compact disc single adaptor
GSA-5
Disc magazine XA-tOB
CD cleaning kit CDM-ZBK

Design and specilications subject to change Without
notice.

compact
Reponse en lrequence
$420,000 HZ il dB
Pleurage et scintillement
inlerieurs a la Ill'nile mesurable
Rapport signal/bruit
92dB
Sorties Sol-tie de ligne (pour le connecteur
du changeur uniquernent)
Consommation 800 mA (lecture oe CD)
800 mA (pendant le chargement
ou Ieiectlon o'un disque)
Temperature de loncltonnement
~10"C a 55°C (14°F 3 131°F)

Dimensuons Env 305 X 85 x I77 mm (Uh/p)
(121/3 x 3I/2 x 7 pouces)
saililes et commandes non
comprises
Poids Env 2.5 kg (5 Iivres B onces)
Alimentation CC sur battens de veiture de l2 V

(masse negative)
Accessoires tournis

Magasin a disques (1)

Materiel de montage (1 mm

Cordon de raccordement (1)
Accessoues en option

Adaptateur simple de disque

compact CSA~8

Magasin a disques XA-1OB

KlI de nettoyage de disques

compacts CDMQBK

La conception ei Ies spemtications peuvent étre
moditiees sans preaws.

comm Disc CHANGER
SONY,»

Page 2

CDX-A55

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 poten-
tial difference generated by the charged electrostatic
load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-
down 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.

classified as a CLASS 1
LASER product.
The CLASS 1 LASER

CLASS I LASER PRODUCT
LUOKAN l LASERLAITE

KLASS 1 LASERAPPARAT

on the rear exterion

SAFETY-R E LATED COMPONENT WARNING! !

COMPONENTS IDENTIFIED BV 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 PUB-
LISHED BY SONY.

ATTENTION AU COMPQSANT AYANT RAPPORT
A LA SECURITEI

LES COMPOSANTS IDENTIFIES PAR one MAROUE A
sun LES DIAGRAMMES SCHEMATIOUES ET LA LISTE
DES PIECES sour CRITIQUES POUR LA sécumré
DE FONCTIONNEMENT. NE REMPLACER ces com.
POSANTS QUE PAR oes PIECES souv DONT LES
NUMénos sour DONNES DANS c5 MANUEL ou
DANS LES SUPPLEMENTS Puaués PAR SONY.

This Compact Disc player is

PRODUCT label is located

TABLE OF CONTENTS

Section m Page
Specificatiofls .................................. 1
Notes on Handling the Optical Pick-up
BIOCkorBaseUnit ................. 2
1. GENERAL
Features ..................... ' ........... 3
Pmparations ..................... 3
Installation 3
Connections ............................. 4
2, DISASSEMBLY ......................... 5
3. ELECTRICAL ADJUSTMENTS
1. Focus Offset Adjustment ------------------- 9
2. Tracking Offset Adjustment ---------------- 9
3. Tracking Gain Adjustment ................. 10
4. Focus Gain Adjustment -------------------- 11
5. PLL Freerun Frequency Check ------------- ll
4. DIAGRAMS
4-1. ICSOl (BA6247N) Motor Driver [C
Operation ......................... 1 2
4-2. Block Diagram -------- 15
433. Printed Wiring Boards . 13
4-4. Schematic Diagram ................. . 21
5. EXPLODED VIEWS .................... 25
6. ELECTRICAL PARTS LIST ------------ 31