Placement; Ac Power And Control; Ac Power Input; Power Switch And Power Indicator 1 - Rotel RMB-1504 Owner's Manual

record of the date of purchase, which you will need in the event warranty
service is ever required.

Placement

The RMB-1504 generate heat as part of its normal operation. The heat
sinks and ventilation openings in the amplifier are designed to dissipate this
heat. The ventilation slots in the top cover must be open. There should be
10 cm (4 inches) of clearance around the chassis, and reasonable airflow
through the installation location, to prevent the amplifier from overheating.
Remember the weight of the amplifier when you select an installation location.
Make sure that the shelf or cabinet can support it. We recommend installing
the unit in furniture designed to house audio components. Such furniture is
designed to reduce or suppress vibration which can adversely affect sound
quality. Ask your authorized Rotel dealer for advice about component
furniture and proper installation of audio components.

AC Power and Control

AC Power Input -

Your amplifier is configured at the factory for the proper AC voltage in the
country where you purchased it, either 120 volts or 230 volts. The AC line
configuration is noted on a decal on the back panel.
NOTE: Should you move your amplifier to another country, it may be
possible to reconfigure it for use on a different line voltage. Do not attempt
to perform this conversion yourself. Opening the enclosure of the amplifier
exposes you to dangerous voltages. Consult a qualified service person or
the Rotel factory service department for information.
NOTE: Some products are intended for sale in more than one country and
as such are supplied with more than one AC cord. Please use only the cord
appropriate for your country/region.
Because of its high power rating, the amplifier can draw considerable
current. Therefore, it should be plugged directly into a polarized wall
outlet using the supplied cable or other high current compatible cable as
recommended by your authorized Rotel dealer. Do not use an extension
cord. A heavy duty multi-tap power outlet strip may be used if it (and the
wall outlet) is rated to handle the current demanded by the amplifier and
all the other components connected to it.
Be sure the POWER SWITCH
turned off (in the "out" position). Then, connect the supplied power cord to
the Power Connector on the rear of the unit and the AC power outlet.
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If you are going to be away from home for an extended period of time
such as a month-long vacation, it is a sensible precaution to unplug your
amplifier (as well as other audio and video components) while you are away.

Power Switch and Power Indicator 1

The power switch is located on the left side of the front panel. To turn the
amplifier on, push the switch in. The ring around the switch will light up,
indicating that the amplifier is turned on. To turn the amplifier off, push the
button again and return it to the "out" position.
NOTE: Place the self adhesive ring over the light surrounding the Power
switch if the blue light is too bright.
1 on the front panel of the amplifier is

Auto Turn On/Off Mode Selector 7

The RMB-1504 provides three different options for manual or automatic
power on/off operation. These modes are selectable using a three-position
slide switch on the back panel as follows:
• With the switch in the OFF position, the amplifier is turned on or off manually
using the front panel power switch. Also use this mode if you are using
a switched AC outlet to control power to the 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 a 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.

12 Volt Trigger Input 6

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. To use this feature the adjacent slide switch must be placed to the
left position (see previous section).
The TRIGGER INPUT accepts any control signal (AC or DC) ranging from 3
volts to 30 volts. Use a cable with mono 3.5 mm mini-plugs on both ends.
The +12V DC signal appears at the "tip" connector.

12 Volt Trigger Output 6

The 12V TRIG jack labeled OUT is used to pass the remote turn-on signal
to a second Rotel amplifier. Any 12V Trigger signal at the INPUT jack will
be passed through to the OUT jack.

Circuit Breaker 0

A circuit breaker on the rear panel protects the amplifier's electrical circuity.
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.

Protection Circuitry 2

The RMB-1504 feature thermal and over-current protection circuits that
protect against potential damage in the event of extreme or faulty operating
conditions. Unlike many designs, these protection circuits are independent
of the audio signal and have no impact on sonic performance. Instead,
the protection circuits monitors the temperature of the output devices and
the current they are handling and shuts down the amplifier if operating
conditions exceed safe limits.
Most likely, you will never see this protection circuitry in action. However,
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
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