User manual SONY XM-D400P5

[. . . ] The ground wire is not securely connected. t Fasten the ground wire securely to a metal point of the car. The voltage going into the remote terminal is too low. [. . . ] ⷠBe sure to use speakers with an adequate power rating. If you use small capacity speakers, they may be damaged. ⷠDo not connect the # terminal of the speaker system to the car chassis, and do not connect the # terminal of the right speaker with that of the left speaker. ⷠInstall the input and output cords away from the power supply wire as running them close together can generate some interference noise. Therefore, it may not perform to its full potential if used with the speaker cords supplied with the car. ⷠIf your car is equipped with a computer system for navigation or some other purpose, do not to remove the ground wire from the car battery. If you disconnect the wire, the computer memory may be erased. To avoid short circuits when making connections, disconnect the +12 V power supply wire until all the other wires have been connected. This unit is designed for negative ground 12 V DC operation only. ⷠUse speakers with suitable impedance. If the fuse blows again after replacement, there may be an internal malfunction. Do not connect any active speakers (with built-in amplifiers) to the speaker terminals of the unit. Doing so may damage the active speakers. ⷠAvoid installing the unit in areas subject to: -- high temperatures such as from direct sunlight or hot air from the heater -- rain or moisture -- dust or dirt · If your car is parked in direct sunlight and there is a considerable rise in temperature inside the car, allow the unit to cool down before use. ⷠWhen installing the unit horizontally, be sure not to cover the fins with the floor carpet etc. ⷠIf this unit is placed too close to the car audio unit or antenna, interference may occur. In this case, relocate the amplifier away from the car audio unit or antenna. ⷠIf no power is being supplied to the car audio unit, check the connections. [. . . ] Connect the +12 V power supply wire only after all the other wires have been connected. ⷠBe sure to connect the ground wire of the unit securely to a metal point of the car. A loose connection may cause a malfunction of the amplifier. [. . . ]