ROTEL RMB-1066 - Manual (Page 6)

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.
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.
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.
+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.
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.
RMB-1066 Six Channel Power Amplifier