28
Troubleshooting (continued)
Music is not played back even
if the USB device is
connected.
The USB device and USB extension cable are not connected
correctly.
a
Connect the USB device and USB extension cable correctly.
There is no music stored in a format that is supported on this unit.
a
Check if there is any music data that can be played stored on
the USB device.
The file system of the USB device is not compatible with this unit.
a
Use a USB device with a FAT12/16/32 file system.
The current consumption of the USB device exceeds 1 A.
a
Use a USB device with a current consumption lower than 1 A.
“READING” is displayed but
music is not played back.
A USB hub is connected.
a
Do not use a USB hub.
Too many recorded folders/files exist.
a
When there are too many recorded folders/files, it may take a
long time to read all of the files.
iPhone is paired and playing
music via USB connection.
After a phone call is received
and ended, the radio returns
to USB/iPod mode but the
speakers are muted.
iPhone is paired with this unit via Bluetooth
®
and the music is output
via Bluetooth
®
communication. (the music is not output from USB
connection)
a
Operate iPhone, tap the bottom right icon
(Bluetooth) in the
iPod mode to select the Audio Device option "Dock Connector"
instead of option "CAR BT", and the music is output from USB
connection.
Always pay attention to the music output setting (Audio Device)
in the iPod mode when iPhone is paired and connected with
this unit via Bluetooth
®
communication.
USB
Unable to register, connect,
or call.
Devices incompatible with HFP (Hands-Free Profile) cannot be used.
a
Use devices compatible with HFP (Hands-Free Profile).
The mobile phone is not registered on this product.
a
Connecting and calling with an unregistered mobile phone is
not possible. Register the mobile phone on this product.
The mobile phone is not connected.
a
Calling is not possible if the mobile phone is not connected to
this product. Connect the mobile phone to this product.
The Bluetooth
®
device can not pair/register with this unit successfully.
a
Check the device Bluetooth
®
setting is set to ON.
a
Delete the paired memory within Bluetooth
®
device and main
unit, then pair again.
a
Switch OFF and ON with device Bluetooth
®
function, then pair again.
a
Check the device PIN code, then input the correct PIN code for
connection.
This unit and Bluetooth
®
device are too far apart.
a
Bring this unit and Bluetooth
®
device closer together and try to
pair again.
The other party in the call
complains of echoing or
noise.
The voice of the other party heard from the car speakers is being
picked up by the microphone and returned to the other party.
a
Close the windows.
a
Move the microphone away from the car speakers.
a
Lower the volume.
Bluetooth
®
CQ̲BT5557U 10/11/25 10:26
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Summary of Contents for PP104078
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