For bluetooth function, For app remote operation – Sony MEX-N4000BT User Manual
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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.
NO MUSIC
The disc or USB device does not contain a music
file.
Insert a music CD.
Connect a USB device with a music file in it.
OVERLOAD
USB device is overloaded.
Disconnect the USB device, then change the
source by pressing SRC.
The USB device has a fault, or an unsupported
device is connected.
PUSH EJT (push eject)
The disc cannot be ejected.
Press (eject).
READ
The unit is reading all track and album
information on the disc.
Wait until reading is complete and playback
starts automatically. Depending on the disc
structure, it may take more than a minute.
USB NO SUPRT (USB not supported)
The connected USB device is not supported.
For details on the compatibility of your USB
device, visit the support site.
[
] or [
]
During reverse or fast-forward, you have reached
the beginning or the end of the disc and you
cannot go any further.
[
]
The character cannot be displayed.
For BLUETOOTH function:
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.
ERROR
BT Initialize failed.
Phonebook access failed.
Phonebook content was changed while
accessing the cellular phone.
Access the phonebook in the cellular phone
again.
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 14).
MEMORY BUSY
This unit is storing data.
Wait until storing has finished.
NO DEV (no device)
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.
P EMPTY (preset number empty)
The preset dial is empty.
UNKNOWN
Name or phone number cannot be displayed
when browsing phonebook or call history.
WITHHELD
Phone number is hidden by caller.
For App Remote operation:
APP -------- (application)
Connection with the application is not made.
Establish iPhone connection again.
APP DISCNCT (application disconnected)
App Remote connection is not made.
Establish the App Remote connection
APP MENU (application menu)
Button operation cannot be performed while a
menu on iPhone/Android phone is open.
Exit the menu on iPhone/Android phone.
APP NO DEV (application no device)
The device with the application installed is not
connected.
Connect the device, then establish iPhone
connection.
APP SOUND (application sound)
Button operation cannot be performed while a
sound menu on iPhone/Android phone is open.
Exit the sound menu on iPhone/Android
phone.