Chevrolet 2008 Optra Owner's Manual page 163

Once playback begins, the track and track number
displays.
If the ignition or radio is turned off with a CD in the
player, it stays in the player. While a CD is in the player
and the ignition is turned on, the radio must be turned
on before the current CD starts playback. When the
ignition and radio are turned on, the CD starts playing
where it stopped, if it was the last selected audio source.
The CD player can play the smaller 3 inch (8 cm)
single CDs with an adapter ring. Full-size CDs and the
smaller CDs are loaded in the same manner.
If playing a CD-R, the sound quality can be reduced
due to CD-R quality, the method of recording, the quality
of the music that has been recorded, and the way the
CD-R has been handled. There can be an increase
in skipping, difficulty in finding tracks, and/or difficulty in
loading and ejecting. If these problems occur, check
the bottom surface of the CD. If the surface of the CD is
damaged, such as cracked, broken, or scratched, the
CD does not play properly. If the surface of the CD
is soiled, see Care of Your CDs on page 3-63 for more
information.
If there is no apparent damage, try a known good CD.
Do not add any label to a CD, it could get caught in the
CD player. If a CD is recorded on a personal computer
and a description label is needed, try labeling the top of
the recorded CD with a marking pen.
Notice: If a label is added to a CD, or more than
one CD is inserted into the slot at a time, or an
attempt is made to play scratched or damaged CDs,
the CD player could be damaged. While using the
CD player, use only CDs in good condition without
any label, load one CD at a time, and keep the
CD player and the loading slot free of foreign
materials, liquids, and debris.
If an error displays, see "CD Messages" later in this
section.
2 RPT (Repeat): Press this button to repeat the current
track. RPT displays. Press this button again to turn
off repeat play.
3 RDM (Random): Press this button to hear the tracks
in random, rather than sequential, order. RDM displays.
Press this button again to turn off random play.
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