Bedienungsanleitung Peavy PV 900 (Seite 8 von 40) (Englisch)

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FRONT PANEL FEATURES

(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

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

amplifier. This breaker is provided to limit current to the

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.

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Peavy PV 900 Seite 8

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