55NX501E/NZ501E
English
English
Owner’s Manual
USB DEVICE
Problem Cause Measure
USB device cannot be inserted.
The USB device has been inserted 
with wrong direction.
Reversing the connection direction 
of the USB device, try it again.
The USB connector is broken. Replace with a new USB device.
USB device is not recognized.
The USB device is damaged. Disconnect the USB device and 
reconnect. If the device is still not 
recognized, try replacing with a 
different USB device.
Connectors are loose.
No sound heard and no file display 
on file list
No MP3/WMA file is stored in the 
USB device.
Store these files properly in the 
USB device.
Sound skips or is noisy.
MP3/WMA files are not encoded 
properly.
Use MP3/WMA files encoded 
properly.
The video of iPod/iPhone image is 
disturbed
The TV Signal setting of the iPod/
iPhone is not set correctly.
Set the TV Signal setting (NTSC/
PAL) of the iPod/iPhone correctly.
Bluetooth
Problem Cause Measure
Cannot pair the Bluetooth enable 
device with the car audio system.
The device does not support the 
profiles required for the system.
Use another device to connect.
The Bluetooth function of the 
device is not enabled.
Refer to the user manual of the 
device for how to enable the 
function.
The audio quality is poor after 
connection with a Bluetooth 
enabled device.
The microphone is not correctly 
positioned.
Use optional external microphone 
and adjust the position of it.
The Bluetooth reception is poor.
Move the device closer to the 
car audio system or remove any 
obstacle between the device and 
the system.