Rotel RB1090 Bedienungsanleitung PDF herunterladen (Seite 7)

7 English

Save the RB-1090 shipping carton and all

enclosed packing material for future use.

Shipping or moving the RB-1090 in anything

other than the original packing material may

result in severe damage to your amplifier.

Be sure to keep the original sales receipt. It

is your best record of the date of purchase,

which you will need in the event warranty

service is ever required.

Placement

The RB-1090 generates heat as part of its

normal operation. The heat sinks and ven-

tilation 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 am-

plifier from overheating.

Likewise, remember the weight of the am-

plifier when you select an installation loca-

tion. Make sure that the shelf or cabinet can

support its considerable bulk. Again, use

common sense.

NOTE

: The RB-1090 has caster wheels at

the rear to help position it.

About THX Ultra™

THX is an exclusive set of standards and

technologies established by the world-re-

nowned film production company, Lucasfilms

Ltd. THX grew from George Lucas’ personal

desire to make your experience of the film

soundtrack, in both movie theaters and in

your home theater, as faithful as possible to

what the director intended.

Movie sound tracks are mixed in special

movie theaters called dubbing stages and

are designed to be played back in movie

theaters with similar equipment and condi-

tions. The soundtrack created for movie the-

aters is then transferred directly onto

Laserdisc, VHS tape, DVD, etc., and is not

changed for playback in a small home the-

ater environment. THX engineers developed

patented technologies to accurately trans-

late the sound from the movie theater envi-

ronment into the home, correcting the tonal

and spatial errors that occur.

Before any home theater component can be

THX Ultra certified, it must incorporate the

THX technologies and also pass a rigorous

series of quality and performance tests. Only

then can a product feature the THX Ultra logo,

which is your guarantee that the Home The-

ater products you purchase will give you

superb performance for many years to come.

AC Power and Control

AC Power Input

Because of its high power rating, the RB-1090

can draw considerable current and may tax

your home’s electrical circuit. Therefore, it

should be plugged directly into a 3-pin po-

larized wall outlet. Do not use an extension

cord. A heavy duty multi-tap power outlet

strip may be used, but only if it (and the wall

outlet) is rated to handle the current de-

manded by the RB-1090.

NOTE

: The RB-1090 has a built-in surge at-

tenuator to prevent opening the electrical

circuit’s breaker or fuse at turn-on.

Be sure the POWER SWITCH on the front panel

of the RB-1090 is turned off (in the out po-

sition). Then, connect the supplied power

cord to the

POWER CONNECTOR on the back

panel of the amplifier and to the AC power

outlet.

Your RB-1090 is configured at the factory

for the proper AC line voltage in the coun-

try where you purchased it (either 115 volts

AC or 230 volts AC with a line frequency

of either 50 Hz or 60 Hz). The AC line con-

figuration is noted on a label on the back

panel.

NOTE

: Should you move your RB-1090 to

another country, it is possible to configure

your amplifier for use on a different line

voltage. Do not attempt to perform this

conversion yourself. Opening the enclo-

sure of the RB-1090 exposes you to dan-

gerous voltages. Consult a qualified

technician or the Rotel factory service de-

partment for information.

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 while you are away.

Power Switch

Power Indicator

The power switch is located in the center of

the front panel of your amplifier. To turn the

amplifier on, push the switch in. The LED in-

dicator above the switch will light, indicat-

ing that the amplifier is turned on. To turn

the amplifier off, push the button again and

return it to the out position.

Protection Circuitry

The RB-1090 features a thermal protection

circuit that protects the amplifier against po-

tential damage in the event of extreme or

faulty operating conditions. Unlike many

designs, the RB-1090’s protection 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 am-

plifier if temperatures exceed safe limits.

In addition, the RB-1090 includes overcurrent

protection which operates only when load

impedances drop below 2 ohms. This pro-

tection is independent for the left and right

channels with separate front panel

PROTEC-

TION LEDS for each.

Most likely, you will never see this protec-

tion circuitry in action. However, should a

faulty condition arise, the amplifier will stop

playing and 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. When

you turn the amplifier back on, the protec-

tion circuit will automatically reset and the

PROTECTION LEDs should go out.

In most cases, the protection circuitry acti-

vates because of a fault condition such as

shorted speaker wires, or inadequate ven-

tilation leading to an overheating condition.

In very rare cases, highly reactive or ex-

tremely low impedance speaker loads could

cause the protection circuit to engage.

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