User manual SONY MEX-BT3950U INSTALLATION GUIDE

[. . . ] Connect the yellow and red power input leads only after all other leads have been connected. Be sure to insulate any loose unconnected leads with electrical tape for safety. [. . . ] In this case, make sure the speaker and amplifier are connected correctly. To a metal surface of the car To the power antenna (aerial) control lead or power supply lead of antenna (aerial) booster Notes It is not necessary to connect this lead if there is no power antenna (aerial) or antenna (aerial) booster, or with a manually-operated telescopic antenna (aerial). When your car has a built-in FM/AM antenna (aerial) in the rear/ side glass, see "Notes on the control and power supply leads. " First connect the black ground (earth) lead, then connect the yellow, and red power supply leads. Before mounting the unit, use the release keys to remove the bracket from the unit. for details , see "Removing the bracket ()" on the reverse side of the sheet. Keep the release keys for future use as they are also necessary if you remove the unit from your car. To the interface cable of a car telephone To the +12 V power terminal which is energized in the accessory position of the ignition key switch This connection is only for amplifiers. To the +12 V power terminal which is energized at all times Notes If there is no accessory position, connect to the +12 V power (battery) terminal which is energized at all times. Be sure to connect the black ground (earth) lead to a metal surface of the car first. When your car has a built-in FM/AM antenna (aerial) in the rear/ side glass, see "Notes on the control and power supply leads. Be sure to connect the black ground (earth) lead to a metal surface of the car first. [. . . ] When the installation and connections are completed, be sure to press the RESET button with a ball-point pen, etc. You may not be able to install this unit in some makes of Japanese cars. [. . . ]