Clarion D8ZBSUS8 Owner's Manual page 26

USB memory device is Disconnect USB memory device and reconnect. If the
damaged. device is still not recognized, try replacing with a
I-C-o-n-n-e-c-to-r-s-a-re-Io-o-s-e-.---idifferent USB memory device.
Sound is The MP3IWMA files are
interrupted or has improperly encoded.
noise.
USB memory
device isn't
recognized.
Can't insert USB
memory device.
26
DB285USB
USB memory device contains
no MP3IWMA files.
The files are not proper MP31
WMA format.
Files are DRM copyright
protected.
Connectors are loose.
USB memory device has
been inserted improperly.
The connector is broken.
Record MP3IWMA files properly to USB memory
device.
Use only properly encoded MP3IWMA files.
See page 17 for details on how to cancel DRM
protection.
Disconnect the device and reconnect securely.
Use only properly encoded MP3IWMA files.
Try reversing the connection direction of USB
memory device (usually the brand name surface
should be facing left).
Replace with a new USB memory device.