Sony DSX-A400BT Operating Instructions Manual page 26

A call partner says that the volume is too low or
high.
 Adjust the volume accordingly using mic gain
adjustment (page 16).
Echo or noise occurs in phone call conversations.
 Lower the volume.
 Set EC/NC Mode to [EC/NC-1] or [EC/NC-2]
(page 16).
 If the ambient noise other than the phone call
sound is loud, try reducing this noise.
E.g.: If a window is open and road noise, etc., is
loud, shut the window. If an air conditioner is
loud, lower the air conditioner.
The phone is not connected.
 When BLUETOOTH audio is played, the phone is
not connected even if you press CALL.
 Connect from the phone.
The phone sound quality is poor.
 Phone sound quality depends on reception
conditions of cellular phone.
 Move your car to a place where you can
enhance the cellular phone's signal if the
reception is poor.
The volume of the connected audio device is low
(high).
 Volume level will differ depending on the audio
device.
 Adjust the volume of the connected audio
device or this unit.
The sound skips during playback of a
BLUETOOTH audio device.
 Reduce the distance between the unit and the
BLUETOOTH audio device.
 If the BLUETOOTH audio device is stored in a case
which interrupts the signal, remove the audio
device from the case during use.
 Several BLUETOOTH devices or other devices
which emit radio waves are in use nearby.
 Turn off the other devices.
 Increase the distance from the other devices.
 The playback sound stops momentarily when the
connection between this unit and the cellular
phone is being made. This is not a malfunction.
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The connected BLUETOOTH audio device cannot
be controlled.
 Check that the connected BLUETOOTH audio
device supports AVRCP.
Some functions do not work.
 Check if the connecting device supports the
functions in question.
A call is answered unintentionally.
 The connecting phone is set to answer a call
automatically.
Pairing failed due to a timeout.
 Depending on the connecting device, the time
limit for pairing may be short.
 Try completing the pairing within the time.
BLUETOOTH function cannot operate.
 Turn off the unit by pressing OFF for more than 2
seconds, then turn the unit on again.
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.
Siri Eyes Free is not activated.
 Perform the handsfree registration for an iPhone
that supports Siri Eyes Free.
 Set the Siri function on the iPhone to on.
 Cancel the BLUETOOTH connection with the
iPhone and the unit, and reconnect.
Pandora® operation
Pandora® connection is not possible.
 Shut down the Pandora® application on the
mobile device, and then launch it again.
Error displays/Messages
HUB NO SUPRT: USB hubs are not supported.
IPD STOP: iPod playback has finished.
 Operate your iPod/iPhone to start playback.