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Portable
CD Player
Operating Instructions
About the area code
The area code of the location in which you purchased the CD player
is shown on upper left of the bar code label on the package.
For accessories supplied with your CD player, check the area code
of your model and see "Accessories (supplied/optional)."
Owner's Record
The model number and the serial number are located at the rear.
Record the serial number in the space provided below. Refer to these
numbers whenever you call upon your Sony dealer regarding this
product.
Model No. D-CS901
Serial No. ____________________________
3-243-809-11 (1)
D-CS901
© 2002 Sony Corporation
"WALKMAN" is a trademark of
Sony Corporation.


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WARNING
To prevent fire or shock
hazard, do not expose the AC
power adaptor to rain or
moisture.
Do not install the appliance in a confined
space, such as a bookcase or built-in
cabinet.
To prevent fire, do not cover the ventilation
of the apparatus with newspapers, table-
cloths, curtains, etc. And don't place lighted
candles on the apparatus.
To prevent fire or shock hazard, do not place
objects filled with liquids, such as vases, on
the apparatus.
CAUTION
The use of optical instruments with this
product will increase eye hazard.
Certain countries may regulate disposal of
the battery used to power this product. Please
consult with your local authority.
CAUTION
· INVISIBLE LASER RADIATION
WHEN OPEN
· DO NOT STARE INTO BEAM OR
VIEW DIRECTLY WITH OPTICAL
INSTRUMENTS
The CE mark is valid only for
products marketed in the European
Union.
For the customers in the USA
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful
interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio
communications. However, there is no guarantee that
interference will not occur in a particular installation.
If this equipment does cause harmful interference to
radio or television reception, which can be determined
by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or
more of the following measures:
­ Reorient or relocate the receiving antenna.
­ Increase the separation between the equipment and
receiver.
­ Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
­ Consult the dealer or an experienced radio/TV
technician for help.
You are cautioned that any changes or modifications not
expressly approved in this manual could void your
authority to operate this equipment.
Product registration
For the customers in the USA
Please register this product on line at www.sony.com/
productregistration.
<http://www.sony.com/productregistration>
Proper registration will enable us to send you periodic
mailings about new products, services, and other
important announcements. Registering your product
will also allow us to contact you in the unlikely event
that the product needs adjustment or modification.
Thank you.


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Table of Contents
Getting started
Locating the controls ................................... 4
Playing an audio CD or MP3
files
1. Connect your CD player. ......................... 6
2. Insert a CD. ............................................. 6
3. Play a CD. ............................................... 7
Playback options
Playing tracks repeatedly (Repeat play) .... 12
Playing all files in a selected folder (Folder
play) (MP3 CD only) ............................ 12
Playing a single track (Single play) ........... 12
Playing tracks in random order
(Shuffle play) ......................................... 13
Playing all files in a selected folder in
random order (Folder shuffle play) (MP3
CD only) ................................................ 13
Playing tracks in your favorite order
(PGM play) ............................................ 14
Available features
G-PROTECTION function ........................ 16
Displaying CD text information ................ 16
Checking the time remaining on the CD and
the number of tracks left ....................... 17
Checking information on a CD with MP3
files ........................................................ 17
Emphasizing the bass sound (SOUND) .... 18
Protecting your hearing (AVLS) ................ 19
Locking the controls (HOLD) ................... 19
Turning off the operation beep sound ........ 20
Connecting your CD player
Connecting a stereo system ....................... 21
Connecting to a power source
Using the rechargeable batteries ................ 22
Using the dry batteries ............................... 24
Notes on the power source ........................ 24
Additional information
Precautions ................................................ 25
Maintenance .............................................. 26
Troubleshooting ......................................... 27
Specifications ............................................ 29
Accessories (supplied/optional) ................ 30
About "MP3" ............................................. 31
About "ID3 tag" ........................................ 31


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Getting started
Locating the controls
For details, see pages in parentheses.
CD player (front)
q; i (headphones)
jack
(pages 6, 21)
7 PLAY MODE
button
(pages 11 - 15)
4 DC IN 4.5 V
(external power
input) jack
(pages 6, 22)
6 FOLDER ­/+ buttons
(pages 9, 14)
2 3-way control key
(see below)
1 HOLD switch
(page 19)
3 VOL* (volume)
control
(page 7)
qa Buckle
(page 6)
5 Display
(pages 8, 9, 12 - 14, 16, 18, 19)
8 REPEAT/ENTER
button
(pages 11, 12, 14, 15)
9 SOUND button
(pages 18, 19)
qs DISPLAY button
(pages 16, 17)
2 3-way control key
Push toward
N
/> or
.
.
Press x/CHG.
N/>**: Play/AMS/search
(pages 7 - 9, 14)
.: AMS/search (pages 7, 14)
x/CHG: Stop/charge
(pages 7, 20, 22)
*
There is a tactile dot beside VOL to show the direction to turn up the volume.
** There is a tactile dot beside N/>.


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CD player (inside)
qf Battery compartment
(page 22)
qd G-PROTECTION
switch
(page 16)
Getting
started
Using the hand strap
During active uses, use the supplied hand strap.
1 Pass the strap through the hooks.
2 Put your hand between the player and the strap, then adjust the length of the strap and fix it
using the Velcro tapes.