User manual SONY XR-1750

[. . . ] Handle the bracket carefully to avoid injuring your fingers. Choose the mounting location carefully so the unit does not interfere with normal driving operations. [. . . ] If there are no car circuits rated as high as the unit`s fuse rating, connect the unit directly to the battery. If no car circuits are available for connecting this unit, connect the unit to a car circuit rated higher than the unit`s fuse rating in such a way that if the unit blows its fuse, no other circuits will be cut off. The illumination on the front panel is factory set to be turned on even while the unit is not in use. However, this setting may cause some car battery wear if your car has no accessory position on the ignition key switch. To avoid this battery wear, set the POWER SELECT switch located on the bottom of the unit to the B position, then press the reset button. The illumination is reset to stay off while the unit is not in use. If the frequency allocatin system of your country is based on 10 kHz (200 kHz) interval, set the switch on the bottom of the unit the 10 K (200 K) position before making connections. When you change the position of the switch, be sure to press the reset button after the connections are complete. When the installation and connections are complete, be sure to press the reset button with a ball-point pen etc. Note If you connect an optional power amplifier and do not use the built-in amplifier, the beep tone will be disabled. [. . . ] Do not connect the terminals of the speaker system to the car chassis, and do not connect the terminals of the right speaker with those of the left speaker. Do not connect any active speakers (with built-in amplifiers) to the speaker terminals of the unit. [. . . ]