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D-E350/E351/E351SR/E353/E355/E356CK
SERVICE MANUAL
PORTABLE CD PLAYER
SPECIFICATIONS
Photo : D-E350
Model Name Using Similar Mechanism
NEW
CD Mechanism Type
CDM-3125ER
Optical Pick-up Type
DAX-25E
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 optical
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
+1
­5
dB (measured by JEITA CP-
307)
Output (at 4.5 V input level)
Headphones (stereo minijack)
Approx. 10 mW + approx. 10 mW
at 16
(Approx. 1 mW + approx. 1 mW
at 16
*)
*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
Ver 1.2 2002.06
With SUPPLEMENT-1
With SUPPLEMENT-2
US Model
D-E350/E356CK
Canadian Model
D-E350/E351/E356CK
AEP Model
D-E350/E351/E353/E351SR/E356CK
UK Model
Australian Model
D-E351/E356CK
E Model
D-E350/E351/E351SR/E353/E355/E356CK
Chinese Model
D-E355
9-873-479-03
2002F0200-1
© 2002.06
Sony Corporation
Personal Audio Company
Pubulished by Sony Engineering Corporation
· AC power adaptor (DC IN 4.5 V jack):
US, CND, C&SA, MX, TW model:
120 V, 60 Hz
AEP, FR, EE, E13 model: 220 - 230 V, 50/60 Hz
UK model: 230 - 240 V, 50 Hz
AUS model: 240 V, 50 Hz
E33, EA, KR model: 100 - 240 V, 50/60 Hz
HK model: 220 V, 50/60 Hz
AR, CH model: 220 V, 50 Hz
Dimensions (w/h/d) (without projecting
parts and controls)
Approx. 130.6
× 26.3 ×150.5 mm
(5 1/4
×11/
16
× 6 in.)
Mass (excluding accessories)
Approx. 190 g (6.8 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.
D-E350
Headphones/earphones (1)
D-E351
AC power adaptor (1)
Headphones/earphones (1)
AC plug adaptor (1)*
*Supplied with EA3 model
D-E351SR
AC power adaptor (1)
Headphones/earphones (1)
Active speaker system (1)
D-E353
AC power adaptor (1)
Headphones/earphones (1)
Rechargeable batteris (2)
Battery carrying case (1)
D-E355
AC power adaptor (1)
Headphones/earphones whith remote
control (1)
Rechargeable batteris (2)
Battery carrying case (1)
D-E356CK
AC power adaptor (1)
Headphones/earphones (1)
Car connecting pack (1)
Car battery cord (1)
Spiral tube (1)
Velcro tape (2)
Design and specifications are subject to change
without notice.


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Specifications ............................................................................ 1
1. SERVICING NOTES ................................................... 3
2. GENERAL
Locating the Controls ......................................................... 3
3. DISASSEMBLY
3-1. Cabinet (Lower), MD ASSY ...................................... 4
3-2. Main Board ................................................................. 4
3-3. "Motor ASSY, Turn Table (Spindle) (M901)" ............ 5
3-4. "Motor ASSY (Spindle) (M902)",
Optical Pick-up (DAX-25E) ...................................... 5
4. ELECTRICAL ADJUSTMENS ............................... 6
5. DIAGRAMS
5-1. Explanation of IC Terminals ....................................... 7
5-2. Block Diagram ............................................................ 9
5-3. Printed Wiring Boards .............................................. 10
5-4. Schematic Diagram ­MAIN SECTION (1/3)­ ........ 11
5-5. Schematic Diagram ­MAIN SECTION (2/3)­ ....... 12
5-6. Schematic Diagram ­MAIN SECTION (3/3)­ ....... 13
6. EXPLODED VIEWS
6-1. Cabinet Section ......................................................... 16
6-2. Optical pick-up Section (CDM-3125ER) ................. 17
7. ELECTRICAL PARTS LIST ................................... 18
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS 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 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 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.
Flexible Circuit Board Repairing
· 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.
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.
TABLE OF CONTENTS
This Compact Disc player is
classified as a CLASS 1 LASER
product.
The CLASS 1 LASER
PRODUCT label is located on
the rear exterior.
CAUTION
Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation
exposure.
Laser component in this product is capable of emitting
radiation exceeding the limit for Class 1.
DANGER
Invisible laser radiation when open and interlock failed or defeated.
Avoid direct exposure to beam.
· Abbreviation
AUS
: Australian
CND : Canadian
FR
: French
HK
: Hong Kong
AR
: Argentina
EA
: Saudi Arabia
CH
: Chinese
EE
: East European
TW
: Taiwan
MX : Mexico
KR
: Korean
C&SA : Central and South America
E13
: AC220-230V area model
E33
: AC100-240V area model
D-E350/E351/E351SR/E353/E355/E356CK


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D-E350/E351/E351SR/E353/E355/E356CK
The laser diode in the optical pick-up block may suffer electrostatic
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 emission, observe from more
than 30cm away from the objective lens.
Before Replacing the Optical pick-up Block
Please be sure to check thoroughly the parameters as per the "Optical
pick-up Block Checking Procedure" (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 yg pin
When checking FOK, remove the lead wire to disc motor.
· RF signal P-to-P value : 0.45 to 0.65Vp-p
SECTION 1
SERVICING NOTES
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 operable.
Method :
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S801 as shown in Fig. 1 .
3. 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.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR
BASE UNIT
Fig.1 Method to push S801
SECTION 2
GENERAL
LOCATING THE CONTROLS
This section is extracted from
instruction manual.
S801
HOLD .
i
VOL
­
VOL
+ SOUND
ESP
OPEN
DISPLAY
DC IN 4.5V
.
x
>B
MENU


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D-E350/E351/E351SR/E353/E355/E356CK
Cabinet (lower),
MD ASSY
Main board
"Motor ASSY, turn table (Spindle) (M901)",
Optical pick-up (DAX-25E), "Motor ASSY (Sled) (M902)"
Set
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. CABINET (LOWER), MD ASSY
3-2. MAIN BOARD
z
The equipment can be removed using the following procedure.
2
Screws (B2 x 10)
1
OPEN
7
CN501
8
CN503 (white)
9
CN502 (black)
5
Claws
5
Claws
3
Open the battery lid
5
Claw
5
Claw
4
Screws (B2 x 10)
Cabinet (lower)
Cabinet (front)
MD ASSY
6
q;
Lid upper
Main board
Cabinet (lower)
1


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D-E350/E351/E351SR/E353/E355/E356CK
3-3. "MOTOR ASSY, TURN TABLE
(SPINDLE) (M901)"
3-4. "MOTOR ASSY (SLED) (M902)",
OPTICAL PICK-UP (DAX-25E)
3
5
6
2
1
Screw (B 1.7x5)
4
Screw
(P 1.4x3.5)
Screw ASSY, Feed
Chassis
Optical pick-up
(DAX-25E)
Bracket (Shaft)
Gear B
Cover, Gear
Motor ASSY (Sled) (M902)
2
Motor ASSY, Turn table
(Spindle) (M901)
1
Screws
(B1.7x5)
Chassis