Sony MEX-BT4050U Operating Instructions Manual page 40

No sound is output from the car speakers
during handsfree call.
 If the sound is output from the cellular phone,
set the cellular phone to output the sound from
the car speakers.
The phonebook data stored in this unit does
not appear.
 The other Bluetooth device is connected to this
unit via the Bluetooth function.
– Connect a cellular phone whose phonebook
data has been transferred to this unit
(page 23).
Error displays/Messages
BT BUSY (Bluetooth Busy)
 The phonebook and the call history of the
cellular phone are not accessible from this unit.
– Wait for a while, and then try again.
CHECKING
 The unit is confirming the connection of a
USB device.
– Wait until confirming the connection is
finished.
DEVICE FULL
 There are 5 devices already stored in the
internal phonebook.
– Delete one of them, then try to add the other
cellular phone's data (page 25).
EMPTY
 The call history is empty.
 The phonebook is empty.
ERROR
 The disc is dirty or inserted upside down.
– Clean or insert the disc correctly.
 A blank disc has been inserted.
 The disc cannot play due to a problem.
– Insert another disc.
 USB device was not automatically recognized.
– Reconnect it again.
 Press  to remove the disc.
 BT Initialize failed.
 Phonebook access failed.
 Phonebook content was changed while
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accessing the cellular phone.
– Access the phonebook in the cellular phone
again.
FAILURE
 The connection of speakers/amplifiers is
incorrect.
– See the installation/connections manual of
this model to check the connection.
HUB NO SUPRT (Hubs Not Supported)
 USB hub is not supported on this unit.
MEM FAILURE (Memory Failure)
 This unit failed to store the contact in the
preset dial.
– Make sure that the number you intend to
store is correct (page 25).
MEMORY BUSY
 This unit is storing data.
– Wait until storing has finished.
MEMORY FULL
 1,000 contacts have been stored.
– The internal phonebook can store a
maximum of 1,000 contacts.
NO DEV (No Device)
 USB is selected as source without a USB device
connected. A USB device or a USB cable has
been disconnected during playback.
– Be sure to connect a USB device and USB
cable.
 Bluetooth audio source is selected without a
Bluetooth audio device connected. A
Bluetooth audio device has been disconnected
during a call.
– Be sure to connect a Bluetooth audio device.
 Bluetooth phone source is selected without a
cellular phone connected. A cellular phone has
been disconnected during a call.
– Be sure to connect a cellular phone.
NO INFO (No Information)
 Network name and cellular phone name are
not received with cellular phone connected.
NO MUSIC
 The disc or USB device does not contain a
music file.
– Insert a music CD in this unit.
– Connect a USB device with a music file in it.