Clarion DXZ778RUSB Owner's Manual page 47

Problem
No sound heard. 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.
Sound is The MP3/WMA/AAC files are
interrupted or has improperly encoded.
noise.
USB memory The USB memory device is
device isn't damaged.
recognized.
Connectors are loose.
Can't insert USB The USB memory devices
memory device. has been inserted
improperly.
The USB connector is
broken.
Cause
Record MP3/WMA/AAC files properly to the USB
memory device.
Use only properly encoded MP3/WMA/AAC files.
See page 27 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.
Measure
DXZ778RUSB
47