User manual ROTEL RKB-650

[. . . ] Rotel products are designed to comply with international directives on the Restriction of Hazardous Substances (RoHS) in electrical and electronic equipment and the disposal of Waste Electrical and Electronic Equipment (WEEE). The crossed wheelie bin symbol indicates compliance and that the products must be appropriately recycled or processed in accordance with these directives. This symbol means that this unit is double insulated. An earth or ground connection is not required. [. . . ] Your RKB-650 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 RKB-650 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 RKB-650 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. With the switch in the SIGNAL SENSE position, the amplifier turns on automatically when a signal is detected at the inputs. The amplifier will go into standby mode several minutes after no signal is no longer present. The front panel power switch overrides this function. it must be ON for the signal sensing to work. Turning the switch OFF cuts power to the amplifier, regardless of whether or not a signal is present. With the switch in the 12V TRIG position, the amplifier is turned on automatically when a 12 volt trigger signal is present at the 12V TRIG input to the left of the switch. The amplifier goes into standby mode if the +12 volt signal is not present. The front panel POWER SWITCH overrides this function. it must be ON for the +12V trigger to work. Turning the switch OFF cuts power to the amplifier, regardless of whether or not a trigger signal is present. Generally, the circuit breaker will only open under a fault condition which results in excessive current draw. to reset the circuit breaker , press the button. Should it repeatedly open, contact your authorized Rotel dealer for troubleshooting assistance. Instead, the protection circuit monitors the temperature of the output devices and shuts down the amplifier if temperatures exceed safe limits. [. . . ] If the amp is getting AC power, but is producing no sound, check the PROTECTION INDICATORS on the front panel. If not, check all of your connections and control settings on associated components. The front panel PROTECTION INDICATORS light when the RKB-650 protection circuits have shut off the amplifier. Typically, this occurs only when the ventilation openings are blocked, when there is faulty speaker wiring, or after a period of extreme use. [. . . ]