User manual ROTEL RP-855

[. . . ] 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. [. . . ] Please contact your authorized Rotel dealer for answers to any questions you might have. in addition , all of us at Rotel welcome your questions and comments. Save the RP-855 shipping carton and all enclosed packing material for future use. Shipping or moving the RP-855 in anything other than the original packing material may result in severe damage to your amplifier. It is your best record of the date of purchase, which you will need in the event warranty service is ever required. However, when rack mounting or otherwise installing the amplifier in a confined space near other heat-generating components, additional cooling may be desirable. The optional RKBF-1 fan kit can be easily installed for additional forced air cooling. In addition to lowering operating temperatures, the optional fan kit improves the performance of the amplifier, especially when driving difficult loudspeaker loads. When not using an equipment rack, place the RP-855 on a solid, level surface away from sunlight, heat, moisture, or vibration. When using the fan cooling, select a location for the amplifier where the noise will not be intrusive. Your RP-855 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). 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 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 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. An input jack for connecting the wires carrying a +12 volt trigger signal from a Rotel preamp or surround sound processor to turn the amplifier on and off. [. . . ] Rotel reserves the right to make improvements without notice. 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. [. . . ]