Sony cdp x 77 es service manual

Page 2

TABLE OF CONTENTS

Section Title Page
Specifications .................................................................. .1
Before Use (Transportation Screw) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2

1. SERVICING NOTES
Model Identification
Safety Check-out"-
Protection of Eyes from Laser Beam
during Servicing ................................................ . ......... 4
Notes on Handring the Optical Pick-up
Block or Base Unit
Notes on Laser Diode Emission Checko-

Laser Diode andFocus Search Operation Check ~~~~~~~~~~~ 5
2. GENERAL
Location of Conn-015 ................................. . .................. 6

Section Title gage
3. I ELECTRICAL ADJUSTMENTS -------------------------------- 10
4, DIAGRAMS
4-]. Circuit Boards Location ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 12
4-2. BU-IOA (Base unit) Section

Printed Wiring Boards ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 13
4-3. Main Section Printed Wiring Boards .
4-4. Schematic Diagram ~~~~~~~~~~~~~~~~~~~~~~~~
4-5, Semiconductor Lead Layouts-
4-6. IC Block Diagramsw

5. EXPLODED VIEWS .................................................. 29

e, ELECTRCAL PARTS LIST ....................................... 35

B fore Use (Transportation Screw)

Before starting any operation, be sure to release the
transportation screw (tor protection of the laser pickup and
internal mechanism) located on the bottom of the unit Turn
this screw in the direction of the arrow, following the Caution
Sheet attached to the bottom plate. To release the
transportation screw, open the cap and turn the screw
counterclockwise 180 degrees using the provided
screwdriver. Be careful not to turn the screw too far, as it
could damage the internal mechanism or cause a
malfunction. Before transporting this unit, tighten the screw
iirmlyi

SAFETY-RELATED COMPONENT WARNING

COMPONENTS IDENTIFIED BY MARK A OR DDTTED
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 SONV.

When rotating the
screw, be sure to place
the unit upside down.

Caution Sheet
(on the bottom plate)

ATTENTION AU COMPOSANT AYANT RAPPORT
A LA secumrér

LES COMPOSANTS IDENTIFIES PAR UNE MAROUE A
sun LES DIAGRAMMES SCHEMATIOUES ET LA LISTE
oas PIECES som CRITIQUES POUR LA sécunrré
oe FONCTIONNEMENTi NE REMPLACER ces comv
POSANTS ous PAR oss PIECES sow DONT LES
NUMEROS sour DONNES DANS ce MANUEL ou
oANs LES SUPPLEMENTS PUBLIES PAR SONY.

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