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SERVICE MANUAL
PORTABLE IC AUDIO PLAYER
US Model
Canadian Model
E Model
NW-S23
AEP Model
NW-S21
SPECIFICATIONS
NW-S21/S23
Ver 1.0 2004.10
9-879-197-01
2004J05-1
© 2004.10
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
US and Foreign patents licensed from Dolby
Laboratories.
OpenMG and its logo are trademarks of Sony Corporation.
SonicStage and SonicStage logo are trademarks or registered
trademarks of Sony Corporation.
ATRAC, ATRAC3, ATRAC3plus and their logos are trademarks of
Sony Corporation.
Microsoft, Windows and Windows Media are trademarks or registered
trademarks of Microsoft Corporation in the United States and/or other
countries.
All other trademarks and registered trademarks are trademarks or
registered trademarks of their respective holders.
In this manual, TM and ® marks are not specified.
Signal-to-noise ratio (S/N)
80 dB or more (excluding ATRAC3 66 kbps)
Dynamic range
85 dB or more (excluding ATRAC3 66 kbps)
Operating temperature
5°C to 35°C (67°F to 95°F)
Power source
Size AAA (LR03) alkaline battery
Battery life (continuous
playback)
ATRAC3 format: Approximately 70 hours
(Playback at 105 kbps)
ATRAC3plus format: Approximately 60 hours
(Playback at 48 kbps)
MP3 format: Approximately 50 hours
(Playback at 128 kbps)
Dimension
78.5
× 48.2 × 20 mm (3 1/8 × 1 15/16 × 13/16 inches)
(w/h/d, projecting parts not included)
Mass
Approx. 40 g (2 oz) (battery not included)
Sampling frequency
ATRAC3, ATRAC3plus, MP3: 44.1 kHz
Audio compression technology
Adaptive Transform Acoustic Coding3 (ATRAC3)
Adaptive Transform Acoustic Coding3plus
(ATRAC3plus)
MPEG1 Audio Layer-3 (MP3): 8 to 320 kbps,
variable bit rate-compliant
Frequency response
20 to 20,000 Hz (single signal measurement)
Output
Headphone: Stereo mini-jack
Maximum recording time (Approx.)
* The values for ATRAC3, ATRAC3plus apply if
the MP3 File Manager software has been erased
from the built-in flash memory.
ATRAC3plus*
1 hr. 00 min. (256 kbps)
4 hr. 10 min. (64 kbps)
5 hr. 50 min. (48 kbps)
ATRAC3*
2 hr. 00 min. (132 kbps)
2 hr. 30 min. (105 kbps)
4 hr. 10 min. (66 kbps)
NW-S21
ATRAC3plus*
2 hr. 00 min. (256 kbps)
8 hr. 30 min. (64 kbps)
11 hr. 40 min. (48 kbps)
ATRAC3*
4 hr. 10 min. (132 kbps)
5 hr. 10 min. (105 kbps)
8 hr. 20 min. (66 kbps)
NW-S23
MP3
1 hr. 00 min. (256 kbps)
2 hr. 00 min. (128 kbps)
MP3
2 hr. 00 min. (256 kbps)
4 hr. 00 min. (128 kbps)
­ Continued on next page ­
Photo: NW-S23


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2
NW-S21/S23
TABLE OF CONTENTS
1.
SERVICING NOTES ............................................... 3
2.
GENERAL ................................................................... 4
3.
DISASSEMBLY
3-1.
Disassembly Flow ...........................................................
5
3-2.
Case (Rear) Sub Assy ......................................................
5
3-3.
Chassis (Battery Case Lid) ..............................................
6
3-4.
MAIN Board ....................................................................
6
3-5.
DISPLAY Board ..............................................................
7
4.
TEST MODE .............................................................. 8
5.
DIAGRAMS
5-1.
Block Diagram ................................................................
9
5-2.
Printed Wiring Board ­ MAIN Board ­ ......................... 11
5-3.
Schematic Diagram ­ MAIN Board (1/2) ­ ................... 12
5-4.
Schematic Diagram ­ MAIN Baord (2/2) ­ ................... 13
5-5.
Printed Wiring Board ­ DISPLAY Board ­ ................... 14
5-6.
Schematic Diagram ­ DISPLAY Board ­ ...................... 15
6.
EXPLODED VIEW
6-1.
Case (Front) Block .......................................................... 20
6-2.
Battery Case Block .......................................................... 21
6-3.
Board Block ..................................................................... 22
7.
ELECTRICAL PARTS LIST ................................ 23
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.
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.
Supplied accessories
Headphones (1)
Dedicated USB cable (1)
Arm band (1)
CD-ROM for the SonicStage software (1)
Operating Instructions (1)
SonicStage Operating Instructions (1)
CD-ROM for the Operating Instructions and
SonicStage Operating Instructions (1) (European
model only)
Pour les utilisateurs en France
En cas de remplacement des écouteurs,
référez-vous au modèle d'écouteurs adaptés à
votre appareil et indiqué ci-dessous.
MDR-J011LP
Design and specifications are subject to
change without notice.


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3
NW-S21/S23
SECTION 1
SERVICING NOTES
· Replacement of CXR704060-201GA (IC400) and
SST32HF802-70-4C-L3KE (IC450) used in this set requires
a special tool.
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 viscou-s (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.
Providing the required system environment
The following system environment is required in order to use the SonicStage Ver. 2.1 for
the Network Walkman.
This software is not supported by the following environments:
· OSs other than the indicated above
· Personally constructed PCs or operating systems
· An environment that is an upgrade of the original manufacturer-installed operating system
· Multi-boot environment
· Multi-monitor environment
· Macintosh
· We do not ensure trouble-free operation on all computers that satisfy the system requirements.
· The NTFS format of Windows XP/Windows 2000 Professional can be used only with the standard
(factory) settings.
· We do not ensure trouble-free operation of the system suspend, sleep, or hibernation function on all
computers.
· For Windows 2000 Professional users, install Service Pack 3 or later version before using the
software.
System requirements
Computer
IBM PC/AT or Compatible
·
CPU: Pentium II 400 MHz or higher (Pentium III 450 MHz or higher
is recommended.)
·
Hard disk drive space: 200 MB or more (1.5 GB or more is
recommended) (The amount space will vary according to Windows
version and the number of music files stored on the hard disk.)
·
RAM: 64 MB or more (128 MB or more is recommended)
Others
·
CD drive (capable of digital playback by WDM)
·
Sound Board
·
USB port (supports USB (previously USB 1.1))
Operating
System
Factory installed:
Windows XP Media Center Edition 2004/Windows XP Media Center
Edition/Windows XP Professional/Windows XP Home Edition/
Windows 2000 Professional/Windows Millennium Edition/Windows
98 Second Edition
Display
High Color (16bit) or higher, 800
600 dots or better (1024 768 dots
or better is recommended)
Others
·
Internet access: for Web registration, EMD services and CDDB
·
Windows Media Player (version 7.0 or higher) installed for playing
WMA files
Notes


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4
NW-S21/S23
SECTION 2
GENERAL
This section is extracted from
instruction manual.
Locating controls
For details about each part, refer to the pages in parentheses.
Rear side
Front side
2
1
4
5
6
7
3
8
9
q;
qa
1
.­/+> button
2
Nx button
3 VOLUME ­/+ button
4 Headphone jack
5 GROUP button
6 Display
7 SOUND/REPEAT button
8 MENU button
You can switch to the Time display by
pressing the MENU button for a while.
qs
qg
qf
qh
qd
9 HOLD (Locking controls) switch
0 Arm band attachment hole
qa Case cover button
qs USB jack
qd ACCESS lamp
qf Battery compartment
qg Case cover
qh Strap hole for attaching the strap
1 Text/graphic information display
Displays track number, track name,
current date and time,MESSAGE
and menu.Press the MENU button
to switch thedisplay mode.
2 Repeat mode indication
The current repeat mode is displayed.
3 AVLS indication
The indication appears while the AVLS
function is activated.
4 Digital sound preset indication
The current sound setting is displayed.
5 Remaining battery indication
The remaining battery power is
displayed.
Display
3 Press the .­/+> button to
adjust the "year" setting and
press the Nx button to confirm.
The "month" digit blinks.
2004y
1m
1d
4 As you did in step 3, adjust the
settings for "month" and "date."
After pressing the .­/+> button
to adjust the "date" setting and pressing
the Nx button to confirm, the display
switches to the time setting screen.
0:00
5 Press the .­/+> button to
adjust the "hour" setting and
press the Nx button to confirm.
The "minute" digit blinks.
0:00
6 As you did in step 5, adjust the
settings for "minute."
After pressing the .­/+> button
to adjust the "minute" setting and
pressing the Nx button to confirm, the
display switches to the time setting
screen.
DA
T E- T IME
7 Press the MENU button.
The display returns to the normal screen.
Adjusting the
current time
setting
(DATE-TIME)
You can set and display the current time.
You can also adjust the time setting of your
Network Walkman to a computer's built-in
clock by connecting your Network Walkman
to the computer
1 Press the MENU button.
The menu screen is displayed.
REPE AT MOD E
>
2 Press the .­/+> button to
select "DATE-TIME" and press the
Nx button to confirm.
The "year" digit blinks.
2004y
1m
1d
Nx button
MENU
button
.­/+>
button
To cancel the Menu mode
Select [RETURN] in the menu screen or press the
MENU button.
To display the current time
Press the MENU button and hold it.
You can display the current time while pressing the
button.
Notes
· If the unit is not used for a long time, your
settings of the date and time may be reset.
· If the current time is not set, the display for the
date and time will be "-- --."
· If PC CLK is set to "ON", the time If PC CLK is
set to "ON", the timesetting of your Network
Walkman isautomatically adjusted to a computer's
built-inclock when your Network Walkman is
connectedto the computer.
· Depending on the shipping area, the time display
format of the unit is set to a 12-hour display or a
24-hour display.
You cannot switch between a 12-hour display and
a 24-hour display in the unit.
A 24-hour display is shown in this manual.
Adjusting the current time setting
(DATE-TIME)


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NW-S21/S23
5
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (REAR) SUB ASSY
· This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
3-2. CASE (REAR) SUB ASSY
(Page 5)
3-4. MAIN BOARD
(Page 6)
3-5. DISPLAY BOARD
(Page 7)
3-3. CHASSIS (BATTERY CASE LID)
(Page 6)
SET
3
five claws
1
cover (play/stop) assy
adhesive sheet (cover P/S)
2
three screws (1.6
× 8)
4
case (rear) sub assy