Sony CDX-L430X - Manual (Page 16)

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The “ST” indication flashes.
•Tune in the frequency accurately.
•The broadcast signal is too weak.
t Set to the monaural reception mode
(page 10).
A programme broadcast in stereo is heard
in monaural.
The unit is in monaural reception mode.
t Cancel monaural reception mode
(page 10).
Error displays
Error displays
The following indications will flash for a while.
E-04
A CD is dirty or inserted upside down.
t Clean or insert the CD correctly.
E-99
The CD unit cannot be operated because of
some problem.
t Press the reset button on the unit.
If these solutions do not help improve the
situation, consult your nearest Sony dealer.