Sony CDX-f5700 Operating Insructions page 33

*1 When an error occurs during playback of a CD or
MD, the disc number of the CD or MD does not
appear in the display.
*2 The disc number of the disc causing the error
appears in the display.
Messages
L.SEEK +/–
The local seek mode is on during automatic
tuning (page 16).
NO AF
There is no altenative frequency for the current
station.
" " or "
You have reached the beginning or the end of
the disc and you cannot go any further.
If these solutions do not help improve the
situation, consult your nearest Sony dealer.
"
33