Sony MEX-BT39UW Operating Instructions - Page 36

The display disappears from/does not appear in the display window. • The dimmer is set to "DIM-ON" (page 29). • The display disappears if you press and hold (SOURCE/OFF). t Press (SOURCE/OFF) on the unit until the display appears. • The connectors are dirty (page 33). The Auto Off function does not operate. The unit is turned on. The Auto Off function activates after turning off the unit. t Turn off the unit. Radio reception The stations cannot be received. The sound is hampered by noises. • The connection is not correct. t Connect a power antenna (aerial) control lead (blue) 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 FM/AM antenna (aerial) in the rear/side glass). t Check the connection of the car antenna (aerial). t 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. • Setting of the local seek mode is not correct. t Tuning stops too frequently: Set "LOCAL-ON" (page 29). t Tuning does not stop at a station: Set "LOCAL-OFF" (page 29). • The broadcast signal is too weak. t Perform manual tuning. During FM reception, the "ST" indication flashes. • Tune in the frequency accurately. • The broadcast signal is too weak. t Set "MONO-ON" (page 29). An FM program broadcast in stereo is heard in monaural. The unit is in monaural reception mode. t Set "MONO-OFF" (page 29). 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. 36 The disc does not play. • Defective or dirty disc. • The CD-Rs/CD-RWs are not for audio use (page 31). MP3/WMA/AAC files cannot be played. 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 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. The display items do not scroll. • For discs with very many characters, those may not scroll. • "AUTO SCR" is set to "OFF." t Set "A.SCRL-ON" (page 29). t Press and hold (DSPL) (SCRL). The sound skips. • Installation is not correct. t Install the unit at an angle of less than 45° in a sturdy part of the car. • Defective or dirty disc. The operation buttons do not function. The disc will not eject. Press the RESET button (page 6). USB playback You cannot play items via a USB hub. This unit cannot recognize USB devices via a USB hub. Cannot play items. A USB device does not work. t Reconnect it. The USB device takes longer to play. The USB device contains files with a complicated tree structure. A beep sounds. During playback, the USB device has been disconnected. t Before disconnecting a USB device, make sure to stop playback first for data protection. The sound is intermittent. The sound may be intermittent at a high-bit-rate of more than 320 kbps. Bluetooth function The connecting device cannot detect this unit. • Before the pairing is made, set this unit to pairing standby mode. • While connected to a Bluetooth device, this unit cannot be detected from another device. Disconnect the current connection and search for this unit from another device. • When the device pairing is made, set the Bluetooth signal output to on (page 23).