Troubleshooting; Power Indicator Is Not Illuminated; No Sound; Protection Indicator - Rotel RMB-1504 Owner's Manual

dual banana type connectors (except in the European Community countries
where their use is not permitted).
Route the wire from the amplifier to the speakers. Give yourself enough slack
so you can move the components to allow access to the speaker connectors.
If you are using dual banana plugs, connect them to the wires and then
plug into the backs of the binding posts. The thumbscrews of the binding
posts should be screwed in all the way (clockwise).
If you are using terminal lugs, connect them to the wires. If you are attaching
bare wires directly to the binding posts, separate the wire conductors and
strip the insulation from the end of each conductor. Be careful not to cut into
the wire strands. Unscrew (turn counterclockwise) the binding post. Place
the connector lug or wire around the binding post shaft. Turn the binding
post clockwise to clamp the connector lug or wire firmly in place.
NOTE: Be sure there are no loose wire strands that could touch adjacent
wires or connectors.
For each group of channels, connect the left speaker to the pair of speaker
connectors labeled LEFT. Connect the right speaker to the speaker connectors
labeled RIGHT. Follow the labels printed above the connectors, Make sure
that the positive terminal of the speaker is connected to the + terminal on the
amplifier. Make sure that the negative terminal of the speaker is connected
to the – terminal of the amplifier.

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
amplifier, refer to the suggestions for the following conditions:

Power Indicator Is Not Illuminated

No main power to the RMB-1504. Check AC power connections at the
amplifier and the AC outlet. Check the front panel power switch. Make sure
that it is set to the ON position. If using signal sensing auto power-on, make
sure that a signal is present at the inputs. If using 12V trigger power-on, make
sure that a trigger signal is present at rear panel 12V TRIG IN connector.

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 illuminated, see below. If not,
check all of your connections and control settings on associated components.

Protection Indicator

The front panel PROTECTION INDICATORS light when the RMB-1504
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

Continuous Power Output
(20-20kHz, < 0.03%, 8 ohms)
Total Harmonic Distortion (20Hz-20kHz, 8 ohms)
Continuous rated power:
One-half rated power:
1 watt power:
Intermodulation Distortion (60Hz : 7kHz, 4:1)
Damping Factor (20-20kHz, 8 ohms)
Input Impedance/Sensitivity
Gain
Input Overload Level
Frequency Response (±1dB)
Signal to Noise Ratio (IHF A)
Crosstalk/Separation
Speaker Impedance
Auto Turn On Level (with all inputs)
Power Requirements
U.S. version
European version
Power Consumption
Standby Power Consumption
Signal Sense
Standby:
BTU
Dimensions (W x H x D)
Front Panel Height
Weight (net)
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.
Rotel and the Rotel HiFi logo are registered trademarks of The Rotel Co, Ltd., Tokyo, Japan.
9
4 x 70 watts/channel,
All channels dirven
< 0.03%
< 0.03%
< 0.03%
< 0.03%
>200
20k Ohms/1.0 volt
26 dB
5.0 volt
10 Hz - 100k Hz
115 dB
> 50 dB
4 ohms minimum
4 mV input signal
120 Volts, 60Hz
230 Volts, 50Hz
300 Watts
1 Watt
< 0.5 watts
810 BTU / h
431 x 144 x 443 mm
17 x 5 / x 17 /
2 1 ins.
3 2
3U / 132.6 mm / 5 / ins
2
9
14.9 kg / 32.8 lbs.