ROTEL RC972 - Manual (Page 10)

10 RC-972 Stereo Control Amplifier
Troubleshooting
Most difficulties in audio systems are the re-
sult of incorrect connections, or improper
control settings. If you encounter problems,
isolate the area of the difficulty, check the con-
trol settings, determine the cause of the fault
and make the necessary changes. If you are
unable to get sound from the RC-972, refer
to the suggestions for the following conditions:
Power Indicator Is Not Lit
The Power Indicator should be lit whenever
the RC-972 is plugged into the wall power
outlet. If it does not light, test the power out-
let 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, and the Power Indica-
tor still will not light, it indicates that the in-
ternal power fuse may have blown. If you be-
lieve this has happened, contact your autho-
rized Rotel dealer to get the fuse replaced.
No Sound
Be sure the RC-972 is turned on. The Volume
Control indicator light and the selected func-
tion indicator should be lit. Be sure the Func-
tion Selector is set to the proper input. Check
to see if wthe Mute Function has been engaged.
Check the signal source to see if it is functioning
properly. Make sure the cables from the sig-
nal source to the RC-972 inputs are connected
properly. Check the power amplifier for power
and proper operation. Check all the wiring
between the RC-972 and the power ampli-
fier, and the power amplifier and speakers.
Specifications
Total Harmonic Distortion (20 Hz-20 kHz) < 0.004%
Intermodulation Distortion (60 Hz : 7 kHz, 4:1) < 0.004% at 1V output
Input Sensitivity / Impedance 150 mV / 24 kOhms
Output Level / Impedance 1 V/ 100 Ohms
Usable Headphone Impedance 8 - 2,000 Ohms
Frequency Response 4Hz-100kHz, +0, -3dB
Tone Controls ± 6dB at 100 Hz and 10K Hz
Signal to Noise Ratio (IHF “A” weighted) 95 dB
Power Requirements
USA Version 115 Volts, 60 Hz
European Version 230 Volt, 50 Hz
Power Consumption 10 Watts
Dimensions (W x H x D) 440 x 72 x 286 mm
173/8” x 27/8” x 111/4”
Weight (net) 4.3 kg, 9.46 lbs.
All specifications are accurate at the time of printing.
Rotel reserves the right to make improvements without notice.