User manual SONY XM-SD22X

[. . . ] These pulses are stepped up by the built-in pulse transformer and separated into both positive and negative power supplies before being converted into direct current again. This is to regulate fluctuating voltage from the car battery. This light weight power supply system provides a highly efficient power supply with a low impedance output. The ground wire is not securely connected. [. . . ] Make sure to place the unit in a well ventilated location. The power connecting wires are installed too close to the RCA pin cords. T Keep the power connecting wires away from the RCA pin cords. The ground wire is not securely connected. Mount the unit either inside the trunk or under a seat. Choose the mounting location carefully so the unit will not interfere with the normal movements of the driver and it will not be exposed to direct sunlight or hot air from the heater. Do not install the unit under the floor carpet, where the heat dissipation from the unit will be considerably impaired. First, place the unit where you plan to install it, and mark the positions of the four screw holes on the mounting board (not supplied). Then drill a 3 mm pilot hole at each mark and mount the unit onto the board with the supplied mounting screws. The mounting screws are all 15 mm long, so make sure that the mounting board is thicker than 15 mm. If the fuse blows again after replacement, there may be an internal malfunction. If your car is equipped with a computer system for navigation or some other purpose, do not 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. Turn on or off the LPF switch at the unit rear as illustrated below. Pass the wires through the cap, connect the wires, then cover the terminals with the cap. Note When you tighten the screw, be careful not to apply too much torque* as doing so may damage the screw. * The torque value should be less than 1 N· 4 ) Note If you wish to use a subwoofer as the monaural speaker, connect the speaker as illustrated above. The output signals to the subwoofer will be the combination of both right and left output signals. * If you have the factory original or some other car audio unit without a remote output for the amplifier, connect the remote input terminal (REMOTE) to the accessory power supply. 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. [. . . ] All power wires connected to the positive battery post should be fused within 450 mm of the battery post, and before they pass through any metal. Make sure that the wires to be connected to the +12 V and GND terminals of this unit are at least 12-Gauge (AWG-12) or have a sectional area of more than 3. When using passive crossover networks in a multispeaker system, care must be taken as the speaker system's impedance should not be lower than that of the suitable impedance for this unit. When you are installing a 12 decibels/octave system in your car, the following points must be considered. [. . . ]