76 EnglishSymptom Remedy/CauseBluetooth (only for DDX6033BT/DDX6033BTM/DDX4033BT/DDX4033BTM)Phone sound quality is poor. • Reduce the distance between the unit and theBluetooth mobile phone.• Move the car to place where you can get a bettersignal reception.The sound is interrupted orskipped while using a Bluetoothaudio player.• Reduce the distance between the unit and theBluetooth audio player.• Disconnect the device connected for Bluetoothphone.• Turn off, then turn on the unit.• (When the sound is not yet restored) connect theplayer again.The connected audio playercannot be controlled.Check whether the connected audio playersupports AVRCP (Audio Video Remote ControlProfile).Bluetooth device does notdetect the unit.• Check whether the Bluetooth adapter (KS-UBT1)is inserted correctly.• Search from the Bluetooth device again.The unit does not make pairingwith the Bluetooth device.• For the device compatible with Bluetooth2.1:Register the device by using a PIN code.(☞ page 54)• For the device compatible with Bluetooth 2.0:Enter the same PIN code for both the unit andtarget device. If the PIN code of the device is notindicated on its instructions, try “0000” or “1234.”Echo or noise occurs. Adjust the microphone unit position.The unit does not respond whenyou try to copy the phonebookto the unit.You may have tried to copy the same entries (asstored) to the unit.