User manual ROTEL RMB-1048

[. . . ] Connect the component to the power outlet only with the supplied power supply cable or an exact equivalent. Do not route the power cord where it will be crushed, pinched, bent at severe angles, exposed to heat, or damaged in any way. Pay particular attention to the power cord at the plug and where it exits the back of the unit. The power cord should be unplugged from the wall outlet if the unit is to be left unused for a long period of time. [. . . ] Position, the amplifier is turned on automatically when a 12 volt trigger signal is applied to the 3. Turning the switch OFF cuts power to the amplifier, regardless of whether or not a trigger signal is present. Thermal and protection circuits protect the amplifier against potential damage in the event of extreme or faulty operating conditions. unlike many designs , the RMB-1048's protection circuit is independent of the audio signal and has no impact on sonic performance. Instead, the protection circuit monitors the temperature of the output devices and shuts down the amplifier if safe limits are exceeded. In addition, the RMB-1048 includes overcurrent protection which operates only when load impedances drop too low. This protection is independent for each of the four pair of channels with separate front panel PROTECTION LEDS for each. Should a faulty condition arise, the amplifier will stop playing and one or more of the PROTECTION LEDS on the front panel will light. If this happens, turn the amplifier off, let it cool down for several minutes, and attempt to identify and correct the problem. When you turn the amplifier back on, the protection circuit will automatically reset and the PROTECTION LEDS should go out. In most cases, the protection circuitry activates because of a fault condition such as shorted speaker wires, or inadequate ventilation leading to an overheating condition. In very rare cases, highly reactive or extremely low impedance speaker loads could cause the protection circuit to engage. To use this feature the adjacent slide switch must be set in the 12V TRIG position (see previous section). This input accepts any control signal (AC or DC) ranging from 3 volts to 30 volts. NOTE: Should you move your RMB-1048 to another country, it is possible to configure your amplifier for use on a different line voltage. Opening the enclosure of the RMB-1048 exposes you to dangerous voltages. Consult a qualified technician or the Rotel factory service department for information. If you are going to be away from home for an extended period of time, it is a sensible precaution to unplug your amplifier. To turn the amplifier on (or to activate either of the optional automatic power-on modes), push the switch in. The LED indicator above the switch will light, indicating that the amplifier is turned on. To turn the amplifier off, push the button again and return it to the out position. The RMB-1048 has two pair of color coded connections for each group of amplifier channels. [. . . ] NOTE: Be sure there are no loose wire strands that could touch adjacent wires or connectors. Most difficulties in audio systems are the result of poor or wrong connections, or improper control settings. If you encounter problems, isolate the area of the difficulty, check the control settings, determine the cause of the fault and make the necessary changes. If you are unable to get sound from the RMB-1048, refer to the suggestions for the following conditions: Check the front panel power switch. [. . . ]