Sony MEX-N4000BT Operating Instructions - Page 25

The talker's voice cannot be heard.  The front speakers are not connected to the unit.  Connect the front speakers to the unit. The talker's voice is output only from the front speakers. A call partner says that the volume is too low or high.  Adjust the volume accordingly using mic gain adjustment (page 14). Echo or noise occurs in phone call conversations.  Lower the volume.  Set EC/NC Mode to [EC/NC-1] or [EC/NC-2] (page 14).  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. 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 time out.  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. Pandora® connection is not possible.  Shut down the Pandora® application on the mobile device, and then launch again. Application name is mismatched with the actual application in App Remote.  Launch the application again from the "App Remote" application. While running the "App Remote" application via BLUETOOTH, the display automatically switches to [BT AUDIO].  The "App Remote" application or BLUETOOTH function has failed.  Run the application again. Error displays/Messages 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.  Connect it again.  Press  to remove the disc. HUB NO SUPRT (hubs not supported)  USB hub is not supported on this unit. IPD STOP (iPod stop)  When repeat play is not set, playback of the last track in album finished. The music application in the iPod/iPhone is terminated.  Press PAUSE to start playback again. 25GB