NAD T 973 Manuel D'utilisation page 6

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T 973manual C.qxd
8/21/2006
11:39 AM
Page 6
9. GROUND CONNECTOR
The T 973 is provided with a GROUND terminal on the rear panel.
This terminal is connected directly to the chassis of the T 973. In
the event of radio hum or radio interference, this terminal can be
connected to a 'true earth' such as a copper plated rod driven
several feet into the ground.
FRONT PANEL CONTROLS
1. POWER SWITCH/STAND-BY LED
Press this button to switch the amplifier on or off. The Power LED
located just above the power button and Protection LED will light up.
After a few seconds, the Protection LED (2) will turn green, indicating
that the amplifier is ready for use.
The T 973 can also be remotely switched from On to Stand-by and
vice-versa using the 12V-trigger input on the back panel. For the
12V-trigger input to work, the T 973 must first be turned on by
means of the Power switch, and the switch must be left in this
position. Using the 12V-trigger source component, switch its 12V-
trigger output to on and off. The T 973's trigger input will now
follow the source component's 12V-trigger output. Ensure that the
Auto Trigger switch on the back panel is in the ON position and that
the 12V-trigger input is connected properly.
2. PROTECTION LED
The Protection LED will light up every time the amplifier is switched
on. After a few seconds it will turn green and the amplifier is ready
for operation.
These LEDs will also come on when one or more of the internal
seven amplifiers go into protect mode, but the other amplifiers will
continue to function so it is likely you will still hear sound.
When the amplifier is switched off completely from normal operation
by means of the power switch, the Protection LEDs will light up and
will fade out in a couple of seconds.
GB
NOTE: If you see the Protection LED light up during use, turn off the
amplifier immediately. Check if all speaker wires are connected
correctly and that none of the wires are damaged, causing a short
circuit. Another cause may be excessive heat build-up inside the
amplifier. Make sure there is adequate ventilation around the
amplifier and that none of its ventilation slots, top or bottom, are
blocked. After the amplifier has cooled down, it will function
normally again.
In case the Protection LED remains on despite the checks mentioned
above, turn the amplifier off and consult your NAD dealer.
3. SOFT CLIPPING LIGHTS
When the Soft Clipping circuit of the T 973 is activated the indicator
LED's on the front panel will light.
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