Clarion DXZ578RUSB Owner's Manual page 38

Problem
No sound heard
Sound is
interrupted or has
noise.
USB memory
device isn't
recognized.
Can't insert USB
memory device.
38
DXZ578RUSB
Cause
The USB memory device
contains no MP3/WMA/AAC
files.
The files are not proper MP3/
WMA/AAC format.
Files are DRM copyright
protected.
Connectors are loose.
The MP3/WMA/AAC files are
improperly encoded.
The USB memory device is
damaged.
Connectors are loose.
The USB memory devices
has been inserted
improperly.
The USB connector is
broken.
Measure
Record MP3/WMA/AAC files properly to the USB
memory device.
Use only properly encoded MP3/WMA/AAC files.
See page 20 for details on how to cancel DRM
protection.
Disconnect the USB memory device and reconnect
securely.
Use only properly encoded MP3/WMA/AAC files.
Disconnect the USB memory device and reconnect. If
the device is still not recognized, try replacing with a
different USB memory device.
Try reversing the connection direction of the USB
device (usually the brand name surface should be
facing left).
Replace with a new USB memory device.