Onkyo CS-255 Instruction Manual page 28

Troubleshooting
Audio performance.
• Audio performance will be at its best about 10 to 30 minutes after the CD receiver has been turned on and had time
to warm up.
• Using cable ties to bundle audio cables with speaker or power cables may degrade the sound quality, so don't do it.
CD Playback
The disc will not play.
• Make sure the disc has been loaded correctly, with the label-side facing up.
• Check to see if the surface of the disc is dirty (see page 12).
• If condensation is suspected, turn on the CD receiver and leave it for 2 to 3 hours before playing any discs.
• Some CD-R/RW discs may not be playable (see page 12).
It takes a long time for playback to start.
• It may take the CD receiver a while to read CDs that contain many tracks or files.
Playback jumps.
• The CD receiver is being subjected to vibration or the disc is scratched or dirty (see page 13).
• The volume may be too loud. Turn down the volume (see page 16).
Can't play MP3 Discs.
• Use only ISO 9660 Level 1 or Level 2 format discs (see page 12).
• The disc has not been finalized. Finalize the disc.
• Check whether the file format is supported (see page 12).
• MP3 files without a ".MP3" or ".mp3" filename extension are not recognized.
iPod/iPhone
There's no sound.
• When connecting an iPod/iPhone to the iPod dock and the USB port respectively, the iPod/iPhone connected to the
iPod dock will be selected as a priority and the iPod/iPhone connected to the USB port with the USB cable cannot be
played.
• Make sure your iPod/iPhone is properly seated in the CD receiver's iPod dock. Even very thin iPod/iPhone cases can
prevent the iPod/iPhone from seating properly on the Lightning connector, so always remove any case before
inserting your iPod/iPhone (see page 20).
• Make sure the CD receiver is turned on, the input source is set to iPod, and the volume is not set too low.
• Make sure that your iPod/iPhone is compatible with the system (see page 7).
The message "ERROR" is displayed.
• Try reconnecting your iPod/iPhone.
Can't control your iPod/iPhone with the CD receiver's remote controller.
• Make sure your iPod/iPhone is properly seated in the CD receiver's iPod dock. Even very thin iPod/iPhone cases can
prevent the iPod/iPhone from seating properly on the Lightning connector, so always remove any case before
inserting your iPod/iPhone (see page 20).
• Your iPod/iPhone may not work soon after it is connected to the CD receiver. In this case, wait a few moments until
your iPod/iPhone wakes up.
• Depending on your iPod/iPhone model, its software version, or the content you're playing, some functions may not
work as expected (see page 20).
• The iPod/iPhone might not be connected if its power is turned off, or if it is insufficiently charged. Check the state of
your iPod/iPhone.
The message "No Device" is displayed.
• Try reconnecting your iPod/iPhone.
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