Clarion NX502E Owner's Manual page 39

Bluetooth
Problem
Cannot pair the
Bluetooth enabled
device with the car
audio system.
The audio quality
is poor after
connection with a
Bluetooth-enabled
device.
38
NX502E
Cause
The device does not support the
profiles required for the system.
The Bluetooth function of the
device is not enabled.
The internal microphone gain is
not set correctly.
The external microphone is
not set correctly nor properly
positioned.
Measure
Use another device to connect.
Refer to the user manual of the device for how
to enable the function.
Adjust the gain of the internal microphone in
System Setup.
Adjust the gain and position of the external
microphone.
For example, stick the microphone onto the
dashboard so it is close to the driver.