PORTABLE CD PLAYER
Model Name Using Similar Mechanism
CD Mechanism Type
Optical Pick-up Name
Photo : D-EJ711
AUS : Australian model
: Chinese model
CND : Canadian model
: East European model
: French model
: German model
: Hong Kong model
: Tourist model
: Korea model
Ver 1.0 2000. 01
-- 2 --
TABLE OF CONTENTS
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 IDENTIFÉS 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 PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
Flexible Circuit Board Repairing
· Keep the temperature of the soldering iron around 270 °C dur-
· 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
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.
SERVICING NOTES ····················································· 3
GENERAL ······································································· 4
DISASSEMBLY ······························································ 5
3-1. Cabinet (Upper) ··································································· 5
3-2. CDM-3123EBA and Main Board ········································ 5
ELECTRICAL ADJUSTMENTS ······························· 6
DIAGRAMS ····································································· 7
5-1. IC Pin Function Description ················································ 7
5-2. IC Block Diagrams ······························································ 9
5-3. Block Diagram ··································································· 10
5-4. Printed Wiring Board ························································· 12
5-5. Schematic Diagram ···························································· 15
EXPLODED VIEWS ···················································· 18
6-1. Cabinet Section ·································································· 18
6-2. Main Section ······································································ 19
6-3. Mechanism Section (CDM-3123EBA) ······························ 20
ELECTRICAL PARTS LIST ···································· 21
-- 3 --
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
The flexible board is easily damaged and should be handled with
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: IC601 eg pin
When checking FOK, remove the lead wire to disc motor.
· RF signal P-to-P value: 0.35 to 0.65 Vp-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
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-
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. With a disc not set, turn on the S801 with a screwdriver having
a thin tip as shown in Fig.1.
Note: Do not push the detection lever strongly, or it may be bent or dam-
3. Press the u button.
4. Observing the objective lens, check that the laser diode emits
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 down 5
times along with inward motion for the focus search.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Fig. 1 Method to push the S801
-- 4 --
This section is extracted
from instruction manual.
-- 5 --
3-1. CABINET (UPPER)
3-2. CDM-3123EBA AND MAIN BOARD
(There are 7 claws.)
Open the lid, battery case.
(Be careful that S802 and S803
engage with the knob when
they are re-assembled.)
Follow the disassembly procedure in the numerical order given.