Sony HT-M77 Operating Instructions Manual page 56

The USB device cannot be connected
into the (USB) port.
• The USB device is being connected
upside down. Connect the USB device
in the correct orientation.
Erroneous display.
• The data stored in the USB device may
have been corrupted.
• The character codes that can be
displayed by this receiver are as
follows:
– Upper cases (A to Z)
– Numbers (0 to 9)
– Symbols (' = < > * + , – . / [ \ ] _)
Other characters may not be displayed
correctly.
"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.
Thus, we recommend following these
guidelines.
– Total folders on USB device: 256 or
less (including "ROOT" folder)
– Total files per folder: 256 or less.
Audio file cannot be played back.
• MP3 files in MP3 PRO format cannot
be played back.
• The audio file is a multiple track audio
file.
• Some AAC files may not be played
back correctly.
• WMA files in Windows Media Audio
Lossless and Professional format
cannot be played back.
• USB device formatted with file
systems other than FAT16 or FAT32
are unsupported.*
56
GB
• If you use partitioned USB device,
only audio files on the first partition
can be played back.
• Playback is possible up to 16 levels
(including "ROOT" folder).
• The number of folders has exceeded
256 (including "ROOT" folder).
• The number of files in a folder has
exceeded 256.
• Files that are encrypted or protected by
passwords cannot be played back.
* This unit supports FAT16 and FAT32, but
some USB device may not support all of
these FAT.
For details, refer to the operating
instructions of each USB device or contact
the manufacturer.
Bluetooth device
Pairing cannot be done.
• Move the Bluetooth device closer to
the receiver.
• Pairing may not be possible if other
Bluetooth devices are present around
the receiver. In this case, turn off the
other Bluetooth devices.
• Pairing from another Bluetooth device
is not possible when the receiver is
connecting to a Bluetooth device.
Disconnect the Bluetooth device
(page 36) and perform the pairing
again (page 35).
• Make sure the correct passkey was
entered at the Bluetooth device
(page 35).
Connection is not possible.
• The Bluetooth device you attempted to
connect does not support the A2DP
profile, and cannot be connected with
the receiver.
• Press BLUETOOTH to connect to the
last connected Bluetooth device.
• Turn on the Bluetooth function of the
Bluetooth device.
• Establish a connection from the
Bluetooth device.