User manual SONY XM-4520

[. . . ] This unit can be used as a bridging amplifier with a maximum output of 200 watts. Direct connection can be made with the speaker outputs of your car audio if it is not equipped with the line output (High level input connection). * Pulse power supply This unit has a built-in power regulator which converts the power supplied by the DC 12 V car battery into high speed pulses using a semiconductor switch. 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. [. . . ] The color will change from green to red when the voltage going out to the speaker terminal or the pin Jack is too high. The color will change from green to red when the temperature rises to an unsafe level. The color will return to green when the temperature returns to normal. The color will change from green to red when receiving a powerful signal. 4 LEVEL adjustment control (FRONT/REAR) The input level can be adjusted with this control when using source equipment made by other manufacturers. 5 TEST TONE button To check the system's status , activate the built-in transmitter then press the TEST TONE button. Choose the mounting location carefully so the unit will not interfere with the normal movements of the driver, and where 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 surface of the mounting board (not supplied). Then drill the holes approximately 3 millimeters (mm) in diameter and mount the unit onto the board with the supplied mounting screws. Never use a fuse with an amperage rating exceeding the one supplied with the unit as this could damage the unit. 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· Pass the leads through the cap, connect the leads, then cover the terminals with the cap. Protection circuit This amplifier is provided with a protection circuit that activates in the following cases: -- when the unit is overheated -- when a DC current is generated -- when the speaker terminals are short-circuited. The color of the POWER/PROTECTOR indicator will change from green to red, and the unit will shut down. If this happens, turn off the connected equipment, take out the cassette tape or disc, and determine the cause of the malfunction. If the amplifier has overheated, wait until the unit cools down before using again. If you have any questions or problems concerning your unit that are not covered in this manual, please consult your nearest Sony dealer. Right speaker Haut-parleur droit Left speaker Haut-parleur gauche * If you have the factory original or some other car audio without a remote output on the amplifier, connect the remote input terminal (REMOTE) to the accessory power supply. purple Mauve Notes on the power supply · Connect the +12 V power supply lead only after all the other leads have been connected. [. . . ] purple Mauve Notes on the power supply · Connect the +12 V power supply lead only after all the other leads have been connected. Be sure to connect the ground lead of the unit securely to a metal surface of the car. Be sure to connect the remote control lead of the car audio to the remote terminal. When using a car audio without a remote output on the amplifier, connect the remote input terminal (REMOTE) to the accessory power supply. [. . . ]