User manual SONY XM-2000R

[. . . ] n Fasten the ground lead securely to a metal surface of the car. The voltage going into the remote terminal is too low. The connected master unit is not turned on. The OVER CURRENT indicator flashes Turn off the power switch. [. . . ] The color will return to green when the temperature returns to normal. 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. 7 DIRECT switch When the DIRECT switch is set to ON, the signal will not go through the lowpass filter, high-pass filter, or low boost circuit. 9 TEST TONE button To check the system's status, activate the built in transmitter then press the TEST TONE button. If the tone is heard, the unit is functioning normally. This unit is designed for negative ground 12 V DC operation only. Use speakers with an impedance of 1 to 4 ohms (2 to 8 ohms when used as a bridging amplifier). Do not connect any active speakers (with built-in amplifiers) to the speaker terminals of the unit. Doing so may damage the active speakers. Avoid installing the unit in areas subject to: -- high temperatures such as from direct sunlight or hot air from the heater -- rain or moisture -- dust or dirt. If your car is parked in direct sunlight and there is a considerable rise in temperature inside the car, allow the unit to cool down before use. Be sure to install the unit horizontally so that the air duct of the cooling fan or its fin will not be covered with carpet etc. The cooling fan operates when the temperature inside the unit rises to a certain level. It is not a malfunction if the cooling fan does not operate when you turn on the power. If this unit is placed too close to the car radio or antenna, interference may occur. In this case, relocate the amplifier away from the car radio or antenna. If no power is being supplied to the master unit, check the connections. This power amplifier employs a protection circuit* to protect the transistors and speakers if the amplifier malfunctions. Do not attempt to test the protection circuit* by covering the heat sink or connecting improper loads. [. . . ] When using the optional RC-46 power amplifier connecting cord, consult that manual for proper use. 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· " Note If you wish to use a subwoofer as a monaural speaker, connect the speaker as illustrated above. The output signals to the subwoofer will be the combination of both the right and left output signals. [. . . ]