User manual SONY XM-7

[. . . ] 3 LEVEL adjustment control The input level can be adjusted with this control when using source equipment made by other manufacturers. Turn it to MAX when the output level of the car audio seems low. 4 LOW BOOST level control Turn this control to boost the frequencies around 40 Hz to a maximum of 10 dB. 7 HI-CURRENT/HI-VOLTAGE mode switch (located on the bottom of the unit) Remove the bottom cover to access the switch. [. . . ] Therefore, make sure that the mounting board is thicker than 15 mm. The following checklist will assist in the correction of most problems which you may encounter with your unit. Before going through the checklist below, refer to the connection and operating procedures. The ground lead is not securely connected. n Fasten the ground lead securely to a metal point of the car. The voltage going into the remote terminal is too low. The connected master unit is not turned on. The model and serial numbers are located on the bottom of the unit. Record the serial number in the space provided below. Refer to these numbers whenever you call upon your Sony dealer regarding this product. The OVER CURRENT indicator light up Turn off the power switch. 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 lead 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 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 lead until all the other leads have been connected. If the fuse blows again after replacement, there may be an internal malfunction. Note Tighten the screws firmly, but be careful not to apply too much force* as doing so may damage the screws. * The torque value should be less than 1 N· When replacing the fuse, be sure to use one matching the amperage stated above the fuse holder. [. . . ] +12 V car battery Batterie de voiture +12 V * If you have the factory original or some other car audio without a remote out-put on the amplifier, connect the remote input terminal (REMOTE) to the accessory 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 point of the car. A loose connection may cause a malfunction of the amplifier. [. . . ]