Sony CMT-S20 Datenbogen

CMT-S20.GB.4-460-924-13(2)

1  Select the CD or USB function.

Press CD  or USB .

2  Select the play mode.

Press PLAY MODE  repeatedly until 
“PROGRAM” appears while the player is 
stopped.

3  Select the desired track or file number.

Press 

/  repeatedly until the desired 

track or file number appears.
When programming MP3/WMA files, press 

 +/

 

  repeatedly to select the 

desired folder, and then select the desired file. 

Selected track or 
file number

Total playing time of 
the selected track 
(CD-DA disc only)

4  Program the selected track or file.

Press    to enter the selected track or file.

5  Repeat steps 3 through 4 to program 

additional tracks or files, up to a total of 
64 tracks or files.

6  To play your program of tracks or files, 

press 

 



.

The program remains available until you 
perform one of the following operations:

 changing the function.

 turning off the system.

 disconnecting the power cord.

 opening the CD compartment.
To play the same program again, press 

 .

Press PLAY MODE .

Press CLEAR  while the player is stopped.

1  Prepare the sound source.

Connect additional audio component to the 
AUDIO IN jack  on the unit using an audio 
analog cord (not supplied).

2  Turn down the volume.

Press VOLUME 

 .

3  Select the AUDIO IN function.

Press AUDIO IN .

4  Start playback.

Start playback of the connected component 
and adjust the volume.

The system may enter standby mode automatically 

if the volume level of the connected component is 

too low. Adjust the component’s volume accordingly. 

See “To turn off the automatic standby function.”

Adjust the 
volume

VOLUME +/

 .

Generate a 
more dynamic 
sound

BASS BOOST .

Set the sound 
effect

EQ  repeatedly until desired 
sound effect is displayed.

Change 
information on 
the display*

DISPLAY  repeatedly when 
the system is on.

Check the clock 
when the 
system is off

DISPLAY  when the system 
is off. The clock is displayed 
for 8 seconds.

*  For example, you can view CD/MP3/WMA disc 

information or the USB device information, such 

as;

 track or file number during normal play.

 track, file or title name during normal play.

 artist name during normal play.

 album or folder name during normal play.

 total playing time and total number of tracks on 

the CD-DA disc (only when normal play mode is 

selected and the player is stopped).

Notes on the display information
 Characters that cannot be displayed appear as “_”.
 The following are not displayed;

 total playing time for an MP3/WMA disc and a 

USB device.

 remaining playing time for an MP3/WMA file.

 The following are not displayed correctly;

 elapsed playing time of an MP3/WMA file 

encoded using VBR (variable bit rate).

 folder and file names that do not follow either 

the ISO9660 Level 1, Level 2 or Joliet in the 

expansion format.

 The following are displayed;

 remaining playing time for a track.

 ID3 tag information for MP3 files when ID3 

version 1 and version 2 tags are used (ID3 

version 2 tag information display has priority 

when both ID3 version 1 and version 2 tags are 

used for a single MP3 file).

 up to 31 characters of ID3 tag information using 

uppercase letters (A to Z), numbers (0 to 9), and 

symbols (+ – . / [ ] _ | 

~

).

The system offers two timer functions. If you use 
both timers, the Sleep Timer has priority. 

You can fall asleep to music. This function works 
even if the clock is not set.
Press SLEEP  repeatedly. If you select “AUTO,” 
the system automatically turns off after the 
current disc or USB device stops, or within 
100 minutes.

You can wake up to a CD, FM reception, USB 
device or an audio component connected to the 
AUDIO IN jack 

 at a preset time.

Make sure you have set the clock.

1  Prepare the sound source.

Prepare the sound source, and then press 
VOLUME +/

  to adjust the volume.

To start from a specific CD track or audio file, 
create your own program.

2  Select the timer set mode.

Press TIMER MENU .
If the clock is not set, the system will be in 
clock set mode. In that case, set the clock.

3  Set the play timer.

Press 

/  repeatedly to select “PLAY 

SET,” then press   .

4  Set the time to start playback.

Press 

/  repeatedly to set the hour, 

then press   . Use the procedure above to 
set the minutes.

5  Use the same procedure as in step 4 to 

set the time to stop playback.

6  Select the sound source.

Press 

/  repeatedly until the desired 

sound source appears, then press   .

7  Turn off the system.

Press 

 . The system automatically turns 

on before the preset time. 
If the system is on at the preset time, the Play 
Timer will not play. Do not operate the system 
from the time the system turns on until the 
playback starts.

To check the setting
1  Press TIMER MENU 



.

2  Press / 



 repeatedly to select 

“SELECT,” and then press   



.

3  Press / 



 repeatedly to select 

“PLAY SEL,” and then press   



.

Repeat the same procedure as above until “OFF” 
appears in step 3, and then press   .

Start over from step 1.

The Play Timer setting remains as long as the setting 

is not cancelled manually.

1  Make sure the power cord and speaker 

cords are correctly and firmly connected.

2  Find your problem in the checklist below, 

and take the indicated corrective action.

If the issue persists, contact your nearest Sony 
dealer.

Immediately unplug the power cord, and 
check the following items after “PROTECT” 
disappears.
 Are the + and  speaker cords short-

circuited?

 Is anything blocking the ventilation holes of 

the system?

After you have checked these above items 
and found to be all right, reconnect the power 
cord, and turn on the system. If the issue 
persists, contact your nearest Sony dealer.

 Is the power cord plugged in?

 This is not a malfunction. The system enters 

standby mode automatically in about 
30 minutes when there is no operation or audio 
signal output. See “To turn off the automatic 
standby function.”

 If about a minute elapses with no operation, 

the clock setting or Play Timer setting is 
cancelled automatically. Perform the operation 
again from the beginning.

 Are the + and  speaker cords short-circuited?
 Are you using only the supplied speakers?
 Is anything blocking the ventilation holes of 

the system?

 The specified station may have temporarily 

stopped broadcast.

 Place the speakers as symmetrically as 

possible.

 Connect only the supplied speakers.

 Move the system away from sources of noise.
 Connect the system to a different wall outlet.
 Install a noise filter (available separately) to the 

power cord.

 Remove any obstacles between the remote 

and the remote sensor  on the unit, and 
position the unit away from fluorescent lights.

 Point the remote at the system’s sensor.
 Move the remote closer to the system.

 Wipe the disc clean, and replace it.
 Move the system to a location away from 

vibration (for example, on top of a stable 
stand).

 Move the speakers away from the system, or 

place them on separate stands. At high volume, 
speaker vibration may cause the sound to skip.

 Set the play mode to normal play mode.

 The following discs can increase the time it 

takes to start playback;

 a disc recorded with a complicated tree 

structure.

 a disc recorded in multisession mode.
 a disc that has not been finalized (a disc to 

which data can be added).

 a disc that has many folders.

 Connect the antenna properly.
 Try another place and orientation for better 

antenna reception.

 Keep the antenna away from the speaker cords 

and the power cord to avoid picking up noise.

 Turn off nearby electrical equipment.

 Try another place and orientation for better 

antenna reception.

 Bundle the antenna cable using commercially 

available cord clips, for example, and adjust the 
cable length.

If the system still does not operate properly, reset 
the system to factory settings.

1  Disconnect and reconnect the power 

cord, and then turn on the system.

2  Hold down  



 on the remote and EQ 



 on the unit until “RESET OK” appears.

All user-configured settings, such as preset 
radio stations, timer, and the clock, are 
deleted.

This system is equipped with an automatic 
standby function. With this function, the system 
enters standby mode automatically in about 30 
minutes when there is no operation or audio 
signal output.
By default, the automatic standby function is 
turned on.
Use buttons on the unit to turn off the automatic 
standby function.

  Hold down 

 



 while the system is 

on, until “AUTO STANDBY OFF” appears.

To turn on the function, repeat the procedure 
until “AUTO STANDBY ON” appears.

Notes
 The automatic standby function is invalid for the 

FM function.

 The system may not enter standby mode 

automatically in the following cases;

 when an audio signal is detected.

 when a USB device is connected.

 during playback of audio tracks or files.

 while the preset Play Timer or Sleep Timer is in 

process.

DISC ERR : You have loaded a disc that cannot be 

played.

FULL : You tried to program more than 64 tracks 

or files (steps).

NO FILE : There are no playable files on the 

CD-R/CD-RW discs or in the USB device.

NO STEP : All of the programmed tracks have 

been erased.

NO USB : No USB device is connected or an 

unsupported USB device is connected.

PLAY SET : You tried to select the timer when the 

Play Timer is not set.

PLS STOP : You pressed PLAY MODE  during 

playback.

SELECT : You pressed TIMER MENU  during 

timer operation.

TIME NG : The Play Timer start and end times are 

set to the same time.

 Audio CD
 CD-R/CD-RW (audio data/MP3/WMA files)

 CD-ROM
 CD-R/CD-RW other than those recorded in 

music CD format, conforming to ISO9660 Level 
1/Level 2 or Joliet

 CD-R/CD-RW recorded in multisession that 

have not ended by “closing the session”

 CD-R/CD-RW of poor recording quality, CD-R/

CD-RW that have scratches or are dirty, or 
CD-R/CD-RW recorded with an incompatible 
recording device

 CD-R/CD-RW which is finalized incorrectly
 Discs containing files other than MPEG 1 Audio 

Layer-3 (MP3)/WMA files

 Discs of non-standard shape (for example, 

heart, square, star)

 Discs that have adhesive tape, paper, or sticker 

attached to them

 Rental or used discs with attached seals where 

the glue extends beyond the seal

 Discs that have labels printed using ink that 

feels tacky when touched

 Before playing, wipe the disc with a cleaning 

cloth from the center out to the edge.

 Do not clean discs with solvents, such as 

benzine, thinner, or commercially available 
cleaners or anti-static spray intended for vinyl 
LPs.

 Do not expose discs to direct sunlight or heat 

sources such as hot air ducts, nor leave them in 
a car parked in direct sunlight.

 Completely disconnect the power cord (mains 

lead) from the wall outlet (mains) if it is not 
going to be used for an extended period of 
time. When unplugging the unit, always grip 
the plug. Never pull the cord itself.

 Should any solid object or liquid get into the 

system, unplug the system, and have it 
checked by qualified personnel before 
operating it again.

 The AC power cord can be changed only by a 

qualified service facility.

 Do not place the system in an inclined position 

or in locations that are extremely hot, cold, 
dusty, dirty, or humid or lacking adequate 
ventilation, or subject to vibration, direct 
sunlight or a bright light.

 Be careful when placing the unit or speakers on 

surfaces that have been specially treated (for 
example, with wax, oil, polish) as staining or 
discoloration of the surface may result.

 If the system is brought directly from a cold to 

a warm location or is placed in a very damp 
room, moisture may condense on the lens 
inside the CD player, and cause the system to 
malfunction. In this situation, remove the disc, 
and leave the system turned on for about an 
hour until the moisture evaporates.

 Heat buildup on the unit during operation is 

normal and is not cause for alarm.

 Do not touch the cabinet if it has been used 

continuously at a high volume because the 
cabinet may have become hot. 

 Do not obstruct the ventilation holes.

This speaker system is not magnetically shielded, 
and the picture on nearby TV sets may become 
magnetically distorted. In this situation, turn off 
the TV, wait 15 to 30 minutes, and turn it back on. 
If there is no improvement, move the speakers 
far away from the TV.

Clean this system with a soft cloth slightly 
moistened with a mild detergent solution. Do not 
use any type of abrasive pad, scouring powder, 
or solvent, such as thinner, benzine, or alcohol.

Power output (rated): 4 watts + 4 watts 
(8 ohms at 1 kHz, 1% THD)
Continuous RMS power output (reference): 
5 watts + 5 watts (8 ohms at 1 kHz, 10% THD)

AUDIO IN (stereo mini jack): Sensitivity 1 V, 
impedance 50 kilohms

SPEAKERS: Accepts impedance of 8 ohms

CD player section
System: Compact disc and digital audio system
Laser Diode Properties

Emission Duration: Continuous
Laser Output*: Less than 44.6µW

*  This output is the value measurement at a distance of 

200mm from the objective lens surface on the Optical 
Pick-up Block with 7mm aperture.

Frequency response: 20 Hz 

 20 kHz

Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 90 dB
Tuner section
FM stereo, FM superheterodyne tuner
Antenna: FM lead antenna
Tuning range: 87.5 MHz 

 108.0 MHz (50 kHz 

step)
USB section

 (USB) port: Type A, maximum current 500 mA

Supported audio formats
Supported bit rate:

MP3 (MPEG 1 Audio Layer-3): 32 kbps 

 

320 kbps, VBR
WMA: 32 kbps 

 192 kbps, VBR

Sampling frequencies:

MP3 (MPEG 1 Audio Layer-3): 32/44.1/48 kHz
WMA: 44.1 kHz

Speaker
Speaker system: Full range, 8 cm dia., cone type
Rated impedance: 8 ohms
Dimensions (W/H/D): Approx. 148 mm × 240 mm 
× 127 mm
Mass: Approx. 1.2 kg net per speaker
Quantity: 2 pieces
General
Power requirements: AC 120 V 

 240 V, 50/60 Hz

Power consumption: 18 watts
Dimensions (W/H/D, including largest 
protrusions) (excl. speakers):

Approx. 170 mm × 133 mm × 240 mm

Mass (excl. speakers): Approx. 1.3 kg
Quantity of the main unit: 1 piece
Supplied accessories: Remote Commander (1), 
FM lead antenna (1), Speaker pads (8)
Design and specifications are subject to change 
without notice.

 Standby power consumption: 0.5 W
 Halogenated flame retardants are not used in 

the certain printed wiring boards.

 Make sure the USB device is connected 

securely.

 Some USB devices can be charged only when 

the system is in the USB function.

 If you connect an unsupported USB device, the 

following problems may occur. Check the 
information on the websites about compatible 
USB devices with URLs listed under “Playing a 
file of the USB device.”

 The USB device is not recognized.
 File or folder names are not displayed on this 

system.

 Playback is not possible.
 The sound skips.
 There is noise.
 A distorted sound is output.

 A problem has been detected with the level of 

electrical current from the 

 (USB) port . 

Turn off the system and remove the USB device 
from the 

 (USB) port . Make sure there is 

no problem with the USB device. If this display 
pattern persists, contact your nearest Sony 
dealer.

 The USB device is not connected correctly. Turn 

off the system, then reconnect the USB device.

 Turn off the system, then reconnect the USB 

device.

 The music data itself contains noise, or the 

sound is distorted. Noise may have been 
entered when creating music data due to the 
conditions of the computer. Create the music 
data again.

 The bit rate used when encoding the files was 

low. Send files encoded with higher bit rates to 
the USB device.

 The reading process can take a long time in the 

following cases.

 There are many folders or files on the USB 

device.

 The file structure is extremely complex.
 The memory capacity is excessive.
 The internal memory is fragmented.

 Send the music data to the USB device again, 

as the data stored in the USB device may have 
been corrupted.

 The character codes that can be displayed by 

this system are numbers and alphabets only. 
Other characters are not displayed correctly.

 Turn off the system and reconnect the USB 

device, then turn on the system.

 Check the information on the websites about 

compatible USB devices with URLs listed under 
“Playing a file of the USB device.”

 The USB device does not work properly. Refer 

to the USB device operation manual for how to 
deal with this problem. 

 Turn off the system and reconnect the USB 

device, then turn on the system.

 Check the information on the websites about 

compatible USB devices with URLs listed under 
“Playing a file of the USB device.”

 Press   to start playback.

 Set the play mode to Normal Play mode.

 The audio files may have inappropriate file 

extensions. The file extensions supported by 
this system are as follows:

 MP3: file extension “.mp3”
 WMA: file extension “.wma”

 The audio files may have been created in 

formats other than MP3/WMA formats.

 USB storage devices formatted with file 

systems other than FAT16 or FAT32 are 
unsupported.*

 If you use a partitioned USB storage device, 

only files on the first partition can be played.

 Files that are encrypted or protected by 

passwords, etc. cannot be played back.

*  This system supports FAT16 and FAT32, but some 

USB storage devices may not support all of these 

FAT. For details, see the operation manual of each 

USB storage device or contact the manufacturer.