so MEX-N7300BD Manual De Instrucciones página 33

For RDS operation:
NO AF: No alternative frequencies.
 Press / (SEEK –/+) while the
program station name is flashing. The unit
starts searching for another frequency
with the same PI (program identification)
data ([PI SEEK] appears).
NO PI: No program identification. The
selected station has no PI (program
identification) data.
 Select another station.
NO TP: No traffic programs.
 The unit will continue searching for
available TP stations.
For BLUETOOTH function:
BTA NO DEV: The BLUETOOTH device is not
connected or recognized.
 Make sure the BLUETOOTH device is
securely connected, or the BLUETOOTH
connection is established with the
BLUETOOTH device.
ERROR: The selected operation could not be
performed.
 Wait for a while, then try again.
UNKNOWN: A name or phone number
cannot be displayed.
WITHHELD: The phone number is hidden by
the caller.
For steering wheel remote control
operation:
ERROR
 Register again from the function where
the error occurred (page 20).
TIMEOUT
 Try completing the registration while
[REGISTER] is blinking (about 6 seconds)
(page 20).
For firmware update operation:
FILE ERROR: The updater is not stored in the
USB device.
 Store the updater in the USB device, then
try again (page 24).
UPDATE ERROR - PRESS ENTER: Firmware
update is not completed properly.
 Press ENTER to clear the message, then try
again.
During the update, do not turn the
ignition to the OFF position, nor remove
the USB device (page 24).
If these solutions do not help improve the
situation, consult your nearest Sony dealer.
If you take the unit to be repaired because of
device playback trouble, bring the device
that was used at the time the problem
began.
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