Sony CDX-3900R Operating Instructions Manual page 25

Radio reception
Problem
Preset tuning is not possible.
The stations cannot be received.
The sound is hampered by
noises.
Automatic tuning is not
possible.
The "ST" indication flashes.
RDS
Problem
The SEEK starts after a few
seconds of listening.
No traffic announcements.
PTY displays "NONE."
If the above-mentioned solutions do not help improve the situation, consult your nearest Sony
dealer.
Cause/Solution
•Store the correct frequency in the memory.
•The broadcast signal is too weak.
Connect a power aerial control lead (blue) or accessory power
supply lead (red) to the power supply lead of a car's aerial
booster. (Only when your car has built-in FM/MW/LW aerial
in the rear/side glass.)
The broadcast signal is too weak.
t Use manual tuning.
•Tune in the frequency accurately.
•The broadcast signal is too weak.
t Set to the MONO mode (page 12).
Cause/Solution
The station is non-TP or has weak signal.
t Press (AF) or (TA) repeatedly until "AF-OFF" or
"TA-OFF" appears.
•Activate "TA."
•The station does not broadcast any traffic announcements
despite being TP. t Tune to another station.
The station does not specify the programme type.
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