Sony MHC-EC69 Operating Instructions Manual page 30

Erroneous display
 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 alphabet only. Other characters are
not displayed correctly.
The USB device is not recognized.
 Turn off the system and reconnect the
USB device, then turn on the system.
 Connect the supported USB device
(page 40).
 The USB device does not work
properly. Refer to the USB device
operation manual for how to deal with
this problem.
Play does not start.
 Turn off the system and reconnect the
USB device, then turn on the system.
 Connect the supported USB device
(page 40).
 Press  (or  on the unit) to start
play.
0
GB
Files cannot be played back.
 The audio file does not have the
extension ".mp3", ".wma", ".m4a", ".mp4"
or ".3gp. "
 The audio file is a multiple track audio
file.
 The file is a video file.
 The data is not stored in MP3/WMA/
AAC format.
 The data is stored in WMA lossless/
AAC lossless format.
 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.
 Playback is possible up to eight levels.
 The number of folders has exceeded
997.
 The number of files has exceeded 999.
 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.