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SERVICE MANUAL
Model Name Using Similar Mechanism New
CD Mechanism Type
CDM-3325ER
Optical Pick-up Type
DAX-25E
US Model
Canadian Model
D-EJ100/EJ106CK
AEP Model
UK Model
D-EJ100/EJ101
E Model
D-EJ100/EJ101/EJ101CK
Australian Model
D-EJ100/EJ106CK
SPECIFICATIONS
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: £f = 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.)
Power requirements
· Two size AA (LR6) batteries: 1.5 V DC x 2
· AC power adaptor (DC IN 4.5 V jack):
100 - 240 V, 50/60 Hz (AEP, UK, EE, E18, Saudi Arabia, Thai)
120 V, 60 Hz (US, Canadian, C&SA, Mexican)
240 V, 50 Hz (Australian)
Dimensions (w/h/d) (without projecting parts and controls)
Approx. 135.8 x 22.8 x 135.8 mm (5 3/
8 x
29/
32 x 5
3/
8 in.)
Approx. 135.8 x 23.5 x 135.8 mm (5 3/
8 x
15/
16 x 5
3/
8 in.)*
*Psyc model
Mass (excluding accessories)
Approx. 180 g (6.4 oz)
Approx. 188 g (6.7 oz)*
*Psyc model
Operating temperature
5
°C - 35°C (41°F - 95°F)
Design and specifications are subject to change without notice.
Supplied Accessories
D-EJ100/EJ101/EJ101CK/EJ106CK
Ver. 1.4 2005.04
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
9-961-981-05
2005D02-1
© 2005.04
PORTABLE CD PLAYER
Photo : D-EJ100
AC power adaptor (1)
a*1
a
a *1
Headphones/earphones (1)
a*1
­
a
Headphones/earphones
a*2
a
­
with remote control (1)
Car connecting pack (1)
­
­
a
Car battery cord (1)
­
­
a
Rotary commander (1)
­
­
a
Velcro tapes for the CD
­
­
a
player (2)
Velcro tape for the rotary
­
­
a
commander (1)
Active speaker system (1)
­
­
­
*1 Not supplied with US and Canadian model
*2 Supplied with US and Canadian model
*3 "Operating Instructions for the car kit" is enclosed.
For the models supplied with the remote control
Use only the supplied remote control. You cannot operate
this CD player with the remote control supplied with other
CD players.
D-EJ101CK/EJ106CK*
3
D-EJ101
D-EJ100


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2
Specifications ............................................................................ 1
1.
SERVICING NOTES ........................................... 3
2.
GENERAL
Locating the Controls ...................................................... 3
3.
DISASSEMBLY
3-1.
Upper Lid ASSY, Cabinet (Upper) Sub ASSY,
Cabinet (Lower) ASSY ................................................... 4
3-2.
MD ASSY (CDM-3325ER), Main Board ....................... 5
3-3.
Motor ASSY (Sled) (M902),
Optical Pick-up (DAX-25E),
Turn Table Motor ASSY(Spindle) (M901) ..................... 6
4.
ELECTRICAL ADJUSTMENS .......................... 7
5.
DIAGRAMS
5-1.
Block Diagram ................................................................ 8
5-2.
Printed Wiring Boards ­MAIN Section (Side A)­ .......... 9
Printed Wiring Boards ­MAIN Section (Side B)­ .......... 10
5-3.
Schematic Diagram ­MAIN SECTION (1/3)­ .............. 11
5-4.
Schematic Diagram ­MAIN SECTION (2/3)­ .............. 12
5-5.
Schematic Diagram ­MAIN SECTION (3/3)­ .............. 13
5-6.
IC Pin Function Description ............................................ 16
6.
EXPLODED VIEWS
6-1.
Upper Lid Section ........................................................... 18
6-2.
Cabinet Section ................................................................ 19
6-3.
Optical pick-up Section (CDM-3325ER) ........................ 20
7.
ELECTRICAL PARTS LIST ............................... 21
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
damaged by heat.
TABLE OF CONTENTS
CAUTION
Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation
exposure.
DANGER
Invisible laser radiation when open and interlock failed or defeated.
Avoid direct exposure to beam.
D-EJ100/EJ101/EJ101CK/EJ106CK
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
· Unleaded solder melts at a temperature about 40
°C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350
°C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
· Strong viscosity
Unleaded solder is more viscous (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
· Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
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.


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3
D-EJ100/EJ101/EJ101CK/EJ106CK
The laser diode in the optical pick-up block may suffer electrostatic break-
down because of the potential difference generated by the charged elec-
trostatic 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 : 0.4 to 0.8Vp-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
S809(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 S809 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 S809
SECTION 2
GENERAL
LOCATING THE CONTROLS
S809
CD player (front)
A
*The button has a tactile dot.
Display
1 ./>
OPEN
2 u*
CD player (inside)
Insert the # end first (for both
batteries).
B
Open the battery compartment lid.
6 SOUND
5 P MODE/
4 DISPLAY/MENU
DC IN 4.5 V (external power
input) jack
i
(headphones) jack
7 x
3 HOLD (rear)
Strap hole
8 VOL +*/­
This section is extracted from
instruction manual.


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4
D-EJ100/EJ101/EJ101CK/EJ106CK
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. UPPER LID ASSY, CABINET (UPPER) ASSY, CABINET (LOWER) ASSY
z
The equipment can be removed using the following procedure.
Cabinet (lower) ASSY
MD ASSY
Motor ASSY (Sled) (M902), Optical pick-up (DAX-25E),
Turn table motor ASSY(spindle) (M901)
Main board
Set
Upper lid ASSY, Cabinet (upper) ASSY
4
tow screws
upper lid assy
cabinet (upper) assy
cabinet (lower) assy
5
claw
7
CN802
3
five screws
1
6
2
5
claw
5
claw


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5
D-EJ100/EJ101/EJ101CK/EJ106CK
3-2. MD ASSY (CDM-3325ER), MAIN BOARD
1
CN501
2
CN401
3
CN402
6
MAIN board
MD assy (CDM-3325ER)
4
5
HOW TO SET THE HARNESS IN ASSEMBLING
CN402
harness
CN401