Sony CDX-M610 Operating Instructions Manual page 32

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.
Interference occurs during FM
reception.
32
Cause/Solution
•Store the correct frequency in the memory.
•The broadcast signal is too weak.
Connect a power antenna control lead (blue) or accessory
power supply lead (red) to the power supply lead of a car's
antenna booster. (Only when your car has built-in FM/AM
antenna 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 17).
The Wide mode is selected.
t Set the IF mode to IF Auto (page 17).