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Rotel RB-1552 Manual

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9
English
Troubleshooting
Most difficulties in audio systems are the result of poor or wrong
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 amplifier, refer to the suggestions for the
following conditions:
Front Panel Power Indicator Is Not Lit
No main power to the amplifier. Check the front panel power
switch. Make sure that it is set to the on position. Check AC power
connections at the amplifier and the AC outlet.
Fuse Replacement
8
RB-1582 Only
If everything checks out correctly and you still cannot get the amplifier
to turn on, check for a blown fuse. Disconnect the AC from the wall
and remove the fuse holder
8
on the back panel. If the fuse is blown,
replace with a new fuse and try again.
Note:
Make sure that the power cord is disconnected from the
wall before checking or replacing the fuse. Replace only with the
identical size and type fuse (3AG125V12A for U.S. version or
5ST6.3 for European version).
The RB-1552 has an internal fuse. If you suspect the fuse is blown take
the amplifier to an authorized Rotel service agency to have it checked.
Do not attempt to do this yourself. Opening the enclosure of the
amplifier exposes you to dangerous voltages.
No Sound
If the amp is getting AC power, but is producing no sound, check
the Protection indicator on the front panel. If it is lit, see below. If
not, check all of your connections and control settings on associated
components.
Protection Indicator Is Lit
The front panel indicator lights when the amplifier protection circuits
have shut off the amplifier. Typically, this occurs only when the
ventilation openings are blocked, when there is faulty speaker wiring,
or after a period of extreme use. Turn off the system and wait for the
amp to cool. Then push the front panel power switch in and out to
reset the protection devices. If the problem is not corrected or reoccurs,
there is a problem with the system or the amplifier itself.
Specifications
RB-1552
Continuous Power Output 130 watts/channel
(20-20 kHz, < 0.03%, 8 ohms)
Total Harmonic Distortion (20Hz-20kHz, 8 ohms) < 0.03%
Intermodulation Distortion (60 Hz : 7 kHz, 4:1) < 0.03%
Frequency Response ( +0.5, –3dB) 4Hz - 100kHz
Damping Factor (20-20,000 Hz, 8 ohms) 450
Speaker Impedance 4 ohms minimum
Signal to Noise Ratio (IHF A network) 120 dB
Input Impedance/Sensitivity 12 k Ohms/1.5 volt
Gain 26.6 dB
Power Requirements
U.S. version 120 Volts, 60 Hz
European version 230 Volts, 50 Hz
Power Consumption 400 Watts
Dimensions
Width x Height x Depth 431 x 144 x 339 mm
17 x 5
7
/8 x 13
3
/8 ins.
Front Panel Height 3U / 132.6mm / 5
1
/4 ins.
Weight (net) 12.4kg / 27.27 lbs.
RB-1582
Continuous Power Output 200 watts/channel
(20-20 kHz, < 0.03%, 8 ohms)
Total Harmonic Distortion (20Hz-20kHz, 8 ohms) < 0.03%
Intermodulation Distortion (60 Hz : 7 kHz, 4:1) < 0.03%
Frequency Response ( +0.5, –3dB) 15Hz - 100kHz
Damping Factor (20-20,000 Hz, 8 ohms) 800
Speaker Impedance 4 ohms minimum
Signal to Noise Ratio (IHF A network) 116 dB
Input Impedance/Sensitivity 12 k Ohms/1.9 volt
Gain 26.5 dB
Power Requirements
U.S. version 120 Volts, 60 Hz
European version 230 Volts, 50 Hz
Power Consumption 550 Watts
Dimensions
Width x Height x Depth 431 x 144 x 407 mm
17 x 5
7
/8 x 16 ins.
Front Panel Height 3U / 132.6mm / 5
1
/4 ins.
Weight (net) 17.1kg / 37.62 lbs.
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.
… 9 …


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