LD Systems IMA 120 Manual De Usuario página 15

MASTER VOLUME CONTROLLER
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The main volume control is used to control the sum signal of all channels except the EMERGENCY channel.
The EMERGENCY channel bypasses the main volume control and the signal is passed directly to the
power amp and speaker output. The main volume control is equipped with a ring-shaped, three-
colour LED indicator. This LED ring remains dark when there is no signal or only a very weak signal at
the output and starts to light up as soon as a sufficient signal level is detected. If the internal limiter
intervenes, the ring lights up yellow. Red light indicates that due to a technical problem (e.g. short
circuit in the loudspeaker cable) the protection circuit of the amplifier has been activated. In this case,
the output is muted. Switch the device off. If the technical problem cannot be solved, please contact an
authorised service centre.
PRIO
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Display field for activated priority mode of the MIC/LINE channels (priority levels 2, 3 and 4).
The priority function of the MIC/LINE channels is activated in the following three situations,
and the PRIO indicator on the front panel lights up yellow:
1. The VOX circuit is active (input signal level MIC/LINE 1 exceeds the set VOX threshold).
2. The contact between the poles C and + of the terminal block connection for channel MIC/LINE 1
is closed via a mute switch/button.
3. The gong/signal tone is played.
For more information on the channel priorities and the EMERG and PRIO indicator panels on the
front panel of the amplifier, see the PRIORITY LEVELS table in this manual.
EMERG
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Display field for the priority feature of the Emergency channel. The EMERG indicator lights up yellow
when priority level 1 is activated by VOX emergency circuit or via a connected mute switch/button
(normally open contact). At the same time, all other input channels are muted. As soon as the contact
opens again or the emergency signal level falls below the defined VOX threshold, all channels are
unmuted and the EMERG indicator goes out.
STANDBY BUTTON
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A short press on the standby button puts the amplifier into standby mode, and the speaker outputs
are muted. If the standby button is briefly pressed a second time , the amplifier is ready for operation
again. When standby mode is activated by pressing the standby button, reactivation of the amplifier
via the automatic standby function is not available, even if an audio signal is detected.
STANDBY LED
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Two-colour LED to indicate the current operating status. During the start-up process, the standby LED
flashes white. The LED lights up permanently white when the start-up process is completed and the
unit is ready for operation. When the unit is put into standby mode, the LED flashes red until the
process is completed. In standby mode, the LED lights up permanently red.
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