FM/AM PORTABLE CD PLAYER
Personal Audio Group
Published by Sony Engineering Corporation
Model Name Using Similar Mechanism
CD Mechanism Type
Optical Pick-up Type
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Ver. 1.1 2005.07
Compact disc digital audio system
Laser diode properties
= 780 nm
Emission duration: Continuous
Laser output: Less than 44.6
(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.)
1-bit quartz time-axis control
40 - 20 000 Hz
4 dB (measured by EIAJ CP-
Output (at 4.5 V input level)
Headphones (stereo minijack)
Approx. 5 mW + Approx. 5 mW at 16
Frequency range (STEP switch)
9 kHz step:
FM: 87.5 - 108.0 MHz
AM: 531 - 1 710 kHz
10 kHz step:
FM: 87.5 - 108.0 MHz
AM: 530 - 1 710 kHz
FM: Headphones cord antenna
AM: Built-in ferrite bar antenna
For the area code of the model you
purchased, check the upper left side of the
bar code on the package.
· Sony NH-WM2AA rechargeable batteries:
2.4 V DC
·Two LR6 (size AA) batteries: 3 V DC
·AC power adaptor (DC IN 4.5 V jack):
120 V, 60 Hz
220 - 230 V, 50/60 Hz
CEK/3CE7 model: 230 - 240 V, 50 Hz
AU2 model: 240 V, 50 Hz
JE.W/E33/EA3 model: 100 - 240 V, 50/60 Hz
HK2 model: 220 V, 50/60 Hz
AR1/CNA model: 220 V, 50 Hz
· Sony DCC-E345 car battery cord for use on
car battery: 4.5 V DC
Battery life* (approx. hours)
(When you use the CD player on a flat and stable
Playing time varies depending on how the CD
player is used.
about 5 hours**)
Two Sony alkaline 31
*Measured value by the standard of EIAJ
(Electronic Industries Association of Japan).
** Charging time varies depending on how the
rechargeable battery is used.
°C - 35°C (41°F - 95°F)
Dimensions (w/h/d) (excluding
projecting parts and controls)
× 38 × 136 mm
× 1 1/2 × 5 3/8 in.)
Mass (excluding accessories)
Approx. 363 g (12.9 oz.)
1. SERVICING NOTES ······················································· 3
2. GENERAL ·································································· 4
3-1. Cabinet (Lower) Sub ASSY,
Cabinet (Inner) Sub Assy, Main Board ································ 5
3-2. MD ASSY ············································································ 5
3-3. Motor ASSY, Turn Table (Spindle) (M902) ························ 6
3-4. Optical Pick-up (DAX-23E),
Motor Assy (Sled) (M901) ··········································· 6
3-5. "Lid, Upper", Switch Unit ··················································· 7
4. ELECTRICAL ADJUSTMENS ···································· 8
5-1. BLOCK DIAGRAM CD SECTION ······························· 10
TUNER SECTION ···························································· 11
5-2. PRINTED WIRING BOARD
MAIN (SIDE A) SECTION ········································· 12
5-3. PRINTED WIRING BOARD
MAIN (SIDE B) SECTION ········································· 13
5-4. SCHEMATIC DIAGRAM TUNER SECTION ·············· 14
5-5. SCHEMATIC DIAGRAM CD SECTION (1/4) ············· 15
5-6. SCHEMATIC DIAGRAM CD SECTION (2/4) ············· 16
5-7. SCHEMATIC DIAGRAM CD SECTION (3/4) ············· 17
5-8. SCHEMATIC DIAGRAM CD SECTION (4/4) ············· 18
5-9. IC PIN FUNCTION DESCRIOTION ······························· 19
5-10. IC BLOCK DIAGRAMS ·················································· 23
6. EXPLODED VIEWS
6-1. CABINET SECTION ························································ 26
6-2. MECHANISM SECTION (CDM-3123EBA) ··················· 27
7. ELECTRICAL PARTS LIST ········································· 28
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
· 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
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
Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation
Invisible laser radiation when open and interlock failed or defeated.
Avoid direct exposure to beam.
For the area code of the location in which you
purchased the CD player, check the upper left side
of the bar code on the package.
AC power adaptor (1)
Hand strap (1)
For US customers
The AC power adaptor supplied is not intended to
be serviced. Should the AC power adaptor cease to
function in its intended manner, during the warranty
period, the adaptor should be returned to your
nearest Sony Service Center or Sony Authorized
Repair Center for replacement, or after warranty
period, it should be discarded.
AC power adaptor
Active speaker system
Car battery cord
Car battery cord with car connecting pack
Car connecting pack
Your dealer may not handle some of the
above listed accessories. Please ask the
dealer for detailed information about the
accessories in your country.
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 eg pin
When checking FOK, remove the lead wire to disc motor.
· RF signal P-to-P value : 0.4 to 0.5Vp-p
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR
Fig.1 Method to push S801
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 diode.
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
The following two checking methods for the laser diode are oper-able.
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.
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 light.
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.
This section is extracted from
CD player (front)
6 i (headphones)
qs HOLD switch
2 PLAY MODE·
TUNING + button
1 SOUND button
qd DC IN 4.5 V
4 RADIO ON·BAND
x (stop)/CHG (charge)·
RADIO OFF button
Note : Follow the disassembly procedure in the numerical order given.
The equipment can be removed using the following procedure.
Flexible board (CN801)
Five screws (B2)
Cabinet (Inner) sub assy
Switching arm assy
Optical pick-up flexible board
3-1. CABINET (LOWER) SUB ASSY, CABINET (INNER) SUB ASSY, MAIN BOARD
3-2. MD ASSY
"Lid, Upper", Switch unit
Cabinet (lower) sub ASSY, Cabinet (inner) sub ASSY, Main board
Motor ASSY, Turn table (Spindle) (M902),
Optical pick-up (DAX-23E), Motor ASSY (Sled) (M901)