Rotel RB-1066 owner manual AC Power Input, Auto Turn On/Off Mode Selector, Protection Indicators

RMB-1066Six Channel Power Amplifier 6

AC Power and Control

AC Power Input

The RMB-1066 is supplied with the proper AC power cord. Use only this cord or an exact equivalent. Do not use an extension cord. A heavy duty multi-tap power outlet strip may be used, but only if it is rated to handle the current demand of the RMB-1066.

Be sure the Power Switch on the front panel of the RMB-1066 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.

Your RMB-1066 is configured at the factory for the proper AC line voltage in the country where you purchased it (USA: 115 volts/60 Hz , Europe: 230 volts/50 Hz). The AC line configuration is noted on a label on the back panel.

NOTE: Should you move your RMB-1066 to another country, it is possible to config- ure your amplifier for use on a different line voltage. Do not attempt to perform this conversion yourself. Opening the enclosure of the RMB-1066 exposes you to danger- ous 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.

Auto Turn On/Off Mode Selector

The RMB-1066 provides three options for manual or automatic power on/off operation. These modes are selectable using a three- position slide switch on the back panel:

•With the switch in the OFF position, the amplifier is turned on or off manually us- ing the front panel power switch. Use this mode if you are using a switched AC out- let to control power to the amplifier.

•With the switch in the SIGNAL SENSING position, the amplifier turns on automati- cally when a signal is sensed at the inputs. The amplifier will go into standby mode after five minutes with no signal. The front panel power switch overrides this function. It must be ON for the signal sensing to work. Turn- ing the switch OFF cuts power to the am- plifier, regardless of whether or not a sig- nal is present.

•With the switch in the +12V TRIG. position, the amplifier is turned on automatically when a 12 volt trigger signal is applied to the 3.5mm Jack to the left of the switch. The amplifier will go into standby mode after 5 minutes with no signal 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 sig- nal is present.

Protection Indicators

Thermal and protection circuits protect the am- plifier against potential damage in the event of extreme or faulty operating conditions. Unlike many designs, the RMB-1066’s pro- tection 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-1066 includes overcurrent protection which operates only when load im- pedances drop too low. This protection is in- dependent for each of the three pair of chan- nels with separate front panel PROTECTION LEDS for each.

Should a faulty condition arise, the amplifier will stop playing and one or more of the PRO- TECTION LEDS on the front panel will light.

If this happens, turn the amplifier off, let it cool down for several minutes, and attempt to iden- tify 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 lead- ing to an overheating condition. In very rare cases, highly reactive or extremely low im- pedance speaker loads could cause the pro- tection circuit to engage.

Power Switch and

Indicator

The Power Switch is located on 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 am- plifier is turned on. To turn the amplifier off, push the button again and return it to the out position.

+12V Trigger Input

and Output

The jack labeled IN is for connecting the 3.5mm Plug/Cable carrying a +12 volt trig- ger signal to turn the amplifier on and off. To use this feature the adjacent slide switch must be placed to the left position (see previ- ous section). This input accepts any control signal (AC or DC) ranging from 3 volts to 30 volts.

The jack labeled OUT is for connecting an- other 3.5mm plug/cable to provide a 12V trigger signal to other components. The 12V output signal is available whenever a +12 volt trigger signal is applied to the IN connector.