ROTEL RA-03 - Manual (Page 9)

9
12 Volt Trigger Outlet
]
Some audio components can be turned on
automatically when they receive a 12V turn
on “signal”. The 12V Trigger Outputs of the
RA-03 provide the required signal. Connect
compatible components to the RA-03 with a
conventional 3.5mm miniplug cable. When the
RA-03 is in Standby mode, the trigger signal
is interupted, so the components controlled by
it are turned off.
Protection Circuitry
3
The RA-03 has both thermal and over-current
protection circuitry that protects the amplifier
against damage in the event of extreme or faulty
operating conditions. The protection circuits
are independent of the audio signal and have
no impact on sonic performance. Instead, the
protection circuits monitor the temperature of
the output devices and shut down the amplifier
if temperatures 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 the LED indicator on the front panel will
light up.
If this happens, turn the amplifier off. Let it
cool down for several minutes, and attempt to
identify and correct the problem that caused
the protection circuitry to engage. When you
turn the amplifier back on, the protection circuit
will automatically reset and the indicator LED
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 imped-
ance speaker loads could cause the protection
circuit to engage.
If the protection circuitry triggers repeatedly
and you are unable to isolate and correct the
faulty condition, contact your authorized Rotel
dealer for assistance in troubleshooting.
Troubleshooting
Most difficulties in audio systems are the result
of incorrect connections, or improper control
settings. If you encounter problems, isolate the
area of the difficulty, check the control settings,
determine the cause of the fault and make the
necessary changes. If you are unable to get
sound from the RA-03 refer to the suggestions
for the following conditions:
Power Indicator Is Not Lit
The Power Indicator should be lit whenever the
RA-03 is plugged into the wall power outlet
and the Power Switch is pushed in. If it does
not light, test the power outlet with another
electrical device, such as a lamp. Be sure the
power outlet being used is not controlled by
a switch that has been turned off.
Fuse Replacement
If another electrical device works when plugged
into the power outlet, but the Power Indicator
of the RA-03 does not light when plugged
into the same outlet and the Power Switch is
pushed in, it indicates that the internal power
fuse may have blown. If you believe this has
happened, contact your authorized Rotel dealer
to get the fuse replaced.
No Sound
Check the signal source to see if it is function-
ing properly. Make sure the cables from the
signal source to the RA-03 inputs are connected
properly. Be sure the Listening Selector is set
to the proper input. Check the wiring between
the RA-03 and the speakers.
Specifications
Continuous Power Output 60 watts/ch
(20-20 kHz, < 0.03%, 8 ohms)
Total Harmonic Distortion (20Hz-20kHz) < 0.03% at rated power, 1/2 power or 1 watt
Intermodulation Distortion (60 Hz : 7 kHz, 4:1) < 0.03% at rated power, 1/2 power or 1 watt
Frequency Response
Phono Input 20Hz-15kHz, ±0.3dB
Line Level Inputs 10Hz-100kHz, +1, –3dB
Damping Factor (20-20,000 Hz, 8 ohms) 180
Input Sensitivity / Impedance
Phono Input 2.5mV / 47 kOhms
Line Level Inputs 150 mV / 24 kOhms
Input Overload
Phono Input 180mV
Line Level Inputs 5V
Premp Output / Impedance 1V / 470 Ohms
Tone Controls - Bass / Treble ±6 dB at 100Hz / 10kHz
Signal to Noise Ratio (IHF “A” weighted)
Phono Input 80 dB
Line Level Inputs 100 dB
Power Requirements
USA Version 115 Volts, 60 Hz
European Version 230 Volts, 50 Hz
Power Consumption 300 W, 36 W - Idle, 3.7 W - Standby
Dimensions (W x H x D) 435 x 92 x 342 mm
17 1 /
8
x 3 5 /
8
x 13 1 /
2
”
Panel Height 80 mm / 3 1 /
16
”
Weight (net) 7.7 kg, 17 lbs.
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.
English