[. . . ] They are for tuner adjustments to be made only by service technicians. Choose the installation location carefully so that the unit will not interfere driving. [. . . ] Use only the supplied mounting hardware for a safe and secure installation. How to detach and attach the front panel Before installing the unit, detach the front panel. Press (RELEASE), then slide the front panel a little to the left, and pull it off towards you. Attach part a of the front panel to part b of the unit as illustrated and push the left side into position until it clicks. With the TOP making up con la marca TOP hacia arriba ­a TOP "">­· Bend these claws outward for a tight fit, if necessary. With the ribs on bottom con la costilla en el fondo ­a¥Y¥X¡""a/L· To support the unit Sujeción de la unidad 'T'w , , This unit is designed for negative earth 12 V DC operation only. If you connect an optional power amplifier and do not use the built-in amplifier, the beep sound will be deactivated. To power antenna control lead or power supply lead of antenna booster amplifier <Note> In case of without power antenna, or antenna booster, not necessary to connect this lead. To the +12 V power terminal which is energized at the accessory position of the ignition key switch Be sure to connect the black earth lead to it first. To the +12 V power terminal which is energized at all times Be sure to connect the black earth lead to it first. To a metal place in the car First connect the black earth lead, then connect the yellow and red power input leads. Memory hold connection When the yellow power input lead is connected, power will always be supplied to the memory circuit even when the ignition key is turned off. [. . . ] notes on speaker connection · Before connecting the speakers, turn the unit off. Use speakers with an impedance of 4 to 8 ohms, and with adequate power handling capacities. [. . . ]