Troubleshooting; Front Panel Power Indicator Is Not Lit; No Sound; Protection Indicator Is Lit - Rotel RMB-1085 Owner's Manual

RMB-1085 Five-Channel Power Amplifier

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 RMB-1085,
refer to the suggestions for the following
conditions:
Front Panel Power Indicator Is
Not Lit
No mains power to the RMB-1085. 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 12V trigger power-on, make sure
that a trigger signal is present at rear panel
screw terminals.

No Sound

If the amp is getting AC power, but is producing
no sound, check the PROTECTION INDICATOR
on the front panel. If lit, see below. If not, check
all of your connections and control settings on
associated components. Make sure that your
input connections and speaker connections
match your selected configuration.

Protection Indicator Is Lit

The front panel PROTECTION INDICATOR
is lit when the RMB-1085 protection circuits
have shut off the amplifier. Typically, this oc-
curs only when the amplifier has overheated,
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
Power Configuration
Watts/Channel all channels driven, with 20kHz filter
8 ohm load, 20Hz to 20kHz, <0.02% THD
4 ohm load, 1kHz, <1% THD
Peak Output Current
Total Harmonic Distortion
At rated power, 20Hz-20kHz
At one-half rated power, 20Hz-20kHz
At 1 watt per channel, 20Hz-20kHz
Intermodulation Distortion at rated power, 60Hz:7 kHz, 4:1
Damping Factor 8 ohms
Amplifier Gain
Input Sensitivity/Impedance
Frequency Response ±3dB
Signal to Noise Ratio IHF A network
Power Requirements
Power Consumption
Idling Power Consumption
Standby Power Consumption
Dimensions (W x H x D)
Front Panel Height (for rack mount)
Weight (net)
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.
8
5 x 100 watts
100 watts
180 watts
11 amps
< 0.02%
< 0.03%
< 0.03%
< 0.03%
200
27.2dB
1.25V/8.2 kohms
10Hz–40kHz
105dB
110-240 volts
250 watts
30 watts
6 watts
432 x 72 x 382 mm
17 1 / x 9
8
60mm
5.4 kg, 11.9 lb.
3 / x 15 1 / in
8 8