Front Panel Features - Peavey PV 900 Bedienungsanleitung

FRONT PANEL FEATURES

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(1) INPUT GAIN (dB)
These controls are used to adjust the input gain of each channel. They determine how "loud" each
channel of the power amplifier will sound for a given input signal level. Maximum input gain is
achieved at the fully clockwise setting (+32 dB, 40 X), and this setting yields maximum mixer/system
headroom. A setting of less than fully clockwise will yield lower system noise at the expense of
mixer/system headroom. Turning the control fully counterclockwise is the "off" setting (-∞). It is
always a good idea to power up any new installation at this setting to protect the system
loudspeakers.
(2) POWER LEDS (PWR)
These indicators illuminate when the AC mains power is being supplied to the amp and both channels
are operational. If either channel experiences fault conditions, exceeds safe operating temperature
limits, or if the mains circuit breaker trips; both channel power LEDs will be dark, indicating
"shutdown". If the BRIDGE mode is selected, the PWR indicator on channel B will remain dark as a
positive indication of this mode selection.
(3) SIGNAL ACTIVITY LEDS (SIG)
These indicators illuminate when the associated channel output signal level exceeds 1 V RMS.
(4) DDT ACTIVE LEDS
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These indicators illuminate when DDT compression is taking place in the associated channel. With
the DDT ENABLE / DEFEAT switch on the back panel in the ENABLE position, these LEDs indicate
clipping is occurring in the corresponding channel. The Peavey DDT compression system will be
covered in greater detail later in this manual.
(5) POWER SWITCH
This heavy-duty, rocker-type switch turns on the mains power to the amplifier. When the mains power
is applied, there is a three-second delay in activation of the unit. This reduces/eliminates the turn-on
transients associated with the system equipment connected to the amplifier and protects
loudspeakers.
(6) CIRCUIT BREAKER
There is one circuit BREAKER on the PV
associated power transformer, and protect it from overheating and possible destruction due to fault
conditions in the unit. The trip current values have been carefully chosen to allow reasonable
continuous power output performance, while still protecting the power transformer. This breaker
should not trip unless there is a fault in the amplifier circuitry that causes excessive mains current
draw. However, abnormal conditions such as a short circuit on either or both channels, or continuous
operation at overload or clipping (especially into 2-Ohm loads per channel or 4-Ohm bridge load) can
cause the breaker to trip. If this occurs, turn the POWER switch OFF and reset the breaker, after
waiting a brief period of time to allow the unit to cool down. Efforts should be made to correct the
cause of the overload if possible. When tripped, the button on the BREAKER will be outward
approximately 1/4" and can be reset by pushing inward and upward. A normal reset button is relatively
flat. If the breaker trips instantly each time you attempt to turn the unit on, it should be taken to a
qualified Peavey Service Center for repair.
amplifier. This breaker is provided to limit current to the
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