Sony MEX-BT3100P Operating Instructions - Page 43

 An optional power amplifier is connected and you are not using the built-in amplifier. The contents of the memory have been erased.  The power supply lead or battery has been disconnected or not connected properly.  The unit is reset. - Store again in the memory. Stored stations and correct time are erased. The fuse has blown. Makes noise when the position of the ignition is switched.  The leads are not matched correctly with the car's accessory power connector. During playback or reception, demonstration mode starts.  If no operation is performed for 5 minutes with "DEMO-ON" set, demonstration mode starts. - Set "DEMO-OFF" (page 36). The display disappears from/does not appear in the display window.  The dimmer is set to "DIM-ON" (page 36).  The display disappears if you press and hold Press on the unit until the display appears.  The connectors are dirty (page 41). The Auto Off function does not operate.  The unit is turned on. The Auto Off function activates after turning off the unit. - Turn off the unit. The operation buttons do not function. The disc will not eject.  Press and (BACK for more than 2 seconds. The contents stored in memory are erased. For your safety, do not perform the reset operation while you are driving. Radio reception The stations cannot be received. The sound is hampered by noises.  The connection is not correct. - Connect an REM OUT lead (blue/white striped) or accessory power supply lead (red) to the power supply lead of a car's antenna (aerial) booster (only when your car has built-in radio antenna (aerial) in the rear/ side glass). - Check the connection of the car antenna (aerial). - If the auto antenna (aerial) will not go up, check the connection of the power antenna (aerial) control lead. Preset tuning is not possible.  Store the correct frequency in the memory.  The broadcast signal is too weak. Automatic tuning is not possible.  The broadcast signal is too weak. - Perform manual tuning. RDS PTY displays The current station is not an RDS station.  RDS data has not been received.  The station does not specify the program type. CD playback The disc cannot be loaded.  Another disc is already loaded.  The disc has been forcibly inserted upside down or in the wrong way. The disc does not play back.  Defective or dirty disc.  The CD-Rs/CD-RWs are not for audio use (page 39). MP3/WMA/AAC files cannot be played back.  The disc is incompatible with the MP3/WMA/ AAC format and version. For details on playable discs and formats, visit the support site. MP3/WMA/AAC files take longer to play back than others.  The following discs take a longer time to start playback. - A disc recorded with a complicated tree structure. - A disc recorded in Multi Session. - A disc to which data can be added. 43