User manual ROTEL RMB-1506

[. . . ] WARNING: There are no user serviceable parts inside. refer all servicing to qualified service personnel. WARNING: To reduce the risk of fire or electric shock, do not expose the unit to moisture or water. Do not expose the unit to dripping or splashing. [. . . ] It is your best record of the date of purchase, which you will need in the event warranty service is ever required. AC Power Input Your RMB-1506 is configured at the factory for the proper AC line voltage in the country where you purchased it (USA: 120 volts/60 Hz, Europe: 230 volts/50 Hz). The AC line configuration is noted on a label on the back panel. The RMB-1506 is supplied with the proper AC power cord. Use only this cord or an exact equivalent. Be sure the power switch on the front panel of the RMB-1506 is turned off. Then, plug one end of the cord into the AC power connector on the back panel of the amplifier. Plug the other end into an appropriate AC outlet. If you are going to be away from home for an extended period of time, it is a sensible precaution to unplug your amplifier. The power switch is located on the left side of the front panel. To turn the amplifier on (or to activate either of the optional automatic poweron modes), push the switch in. The indicator light around 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. Instead, the protection circuit monitors the temperature of the output devices and shuts down the amplifier if temperatures exceed safe limits. In addition, the RMB-1506 includes overcurrent protection which operates only when load impedance drops too low. 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. There are independent PROTECTION LEDS for each pair of channels which may help in troubleshooting the cause of 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 causing an overheating condition. In very rare cases, highly reactive or extremely low impedance speaker loads could cause the protection circuit to engage. The RMB-1506 provides three different options for manual or automatic power on/off operation. [. . . ] make sure that it is set to the ON position. If using signal sensing auto power-on, make sure that a signal is present at the inputs. If using 12V trigger power-on, make sure that a trigger signal is present at rear panel 12V TRIG IN connector. If the amp is getting AC power, but is producing no sound, check the PROTECTION INDICATORS on the front panel. [. . . ]