Sony GTK-X1BT Operating Instructions Manual page 26

"CHILD" and "LOCK" appear when
you press any button on the unit.
• Set the Child Lock function to off
(page 24).
USB device
There is no sound.
• The USB device is not connected
correctly. Turn off the system and
reconnect the USB device, then turn on
the system.
There is noise, skipping, or distorted
sound.
• You are using an unsupported USB
device. Check the information on the
website about compatible USB devices
(page 25).
• Turn off the system and reconnect the
USB device, then turn on the system.
• 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 audio
files was low. Send audio files with
higher bit rate to the USB device.
"READING" is displayed for an
extended time, or it takes a long time
before playback starts.
• 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.
"OVER CURRENT" appears.
• A problem has been detected with the
level of electrical current from the
port. Turn off the system and remove the
USB device from the port. Make sure
there is no problem with the USB
device. If this display pattern persists,
contact your nearest Sony dealer.
26 GB
Erroneous display.
• The data stored in the USB device may
have been corrupted, send the music
data to the USB device again.
• The character codes that can be
displayed by this system are numbers
and alphabets only. Other characters
that cannot be displayed appear as "_".
The USB device is not recognized.
• Turn off the system and reconnect the
USB device, then turn on the system.
• Check the information on the website
about compatible USB devices
(page 25).
• The USB device does not work
properly. Refer to the operating
instructions of your USB device on how
to deal with this problem.
Playback does not start.
• Turn off the system and reconnect the
USB device, then turn on the system.
• Check the information on the website
about compatible USB devices
(page 25).
Playback does not start from the first
file.
• Set the play mode to Normal Play
(page 12).
Audio file cannot be played back.
• MP3 files in MP3 PRO format cannot be
played back.
• Some AAC files may not be played back
correctly.
• An AAC file which has video stream
cannot be played back.
• WMA files in Windows Media Audio
Lossless and Professional format cannot
be played back.
• USB devices formatted with file
systems other than FAT16 or FAT32 are
unsupported.*
• If you use a partitioned USB device,
only files on the first partition can be
played.
• The system can play back to a depth of
8 folders only.
• Files that are encrypted or protected by
passwords cannot be played back.