Clarion DXZS1SUSB Owner's Manual page 38

The USB connector is Replace with a new USB memory device.
broken.
The MP3/WMAlAAC files are Use only properly encoded MP3/WMAlAAC files.
improperly encoded.
The USB memory devices Try reversing the connection direction of the USB
has been inserted improperly. device (usually the brand name surface should be
facing left).
Disconnect the USB memory device and reconnect
securely.
Use only properly encoded MP3/WMAlAAC files.
See page 16 for details on how to cancel DRM
protection.
Record MP3/WMAlAAC files properly to the USB
memory device.
Connectors are loose.
Files are DRM copyright
protected.
The files are not proper MP31
WMAlAAC format.
The USB memory device
contains no MP3IWMAlAAC
files.
The USB memory device is Disconnect the USB memory device and reconnect. If
damaged. the device is still not recognized, try replacing with a
I-C-o-n-n-e-c-to-rs-a-re-Io-o-se-.-----l different USB memory device.
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DXZ575USB