THE AC MAINS AND SPEAKER LOAD MODULE IS NOT REMOVABLE. DO NOT ATTEMPT TO REPLACE OR REMOVE IT!
This module can only be serviced by a Peavey
SIGNAL GROUND CONNECTION
Connections at the input connector permit the audio signal ground to be connected or lifted from the chassis ground. Whenever possible, the shield of the signal source connecting cable should connect to the chassis ground. In some cases, however, particularly if an amplifier is being installed in an existing system, this may result in a ground loop. If this happens, connect the shield to the signal ground only. The chassis ground also connects to the AC ground internally. If the cable shield is connected to the signal ground only, it will be clamped to +/- 0.6V above or below chassis/AC ground.
PROTECTION FEATURES
The IA Series incorporates protection features derived from Peavey’s extensive experience with reliability. The amplifiers are ruggedly built from high quality components and feature comprehensive protection circuits to protect your amplifier from those “real world” occurrences.
CLIP LIMITING
At the amplifier’s full power, or clipping point, the channel gain will automatically be reduced, guard- ing the loudspeakers against damaging high power and continuous square waves that would other- wise be produced. This is indicated by illumination of the Clip LED. Normal program transients will not trigger Clip Limiting; only steady or excessive clipping will. Operation is virtually transparent in use and full signal bandwidth is maintained.
LOAD FAULT CORRECTION™
LFC™ (Load Fault Correction™) is an innovative circuit that will instantaneously reduce channel gain to allow the amplifier to operate at a safe level into an abnormal load. This is indicated by illumina- tion of the LFC LED. Moderate activation of LFC is inaudible in normal use. In addition, if extreme low impedance or a short circuit is encountered during high signal level conditions, the amplifier’s output relay will open.
INITIALIZATION PROTECTION™ (IP™ )
IP™ operates every time the amplifier is turned on, or after a protect condition. During
the initial
THERMAL PROTECTION
If the heatsink temperature or power transformer reaches an abnormally high temperature, the amplifier will protect itself by disconnecting the speaker load until the amplifier returns to a normal temperature. During this time, the Protect LED will illuminate, and the cooling fan will operate at maximum speed.
SHORT CIRCUIT
If an output is shorted, the LFC™, speaker relay and thermal circuits will automatically protect the amplifier. The LFC™ circuit senses the short circuit as an abnormal load condition and reduces the channel gain to a safe level for the load. In extreme or severe conditions, the speaker relays will disconnect the load and initiate a
DC VOLTAGE PROTECTION
If an amplifier channel detects DC voltage or subsonic signals at its output terminals, the speaker relay will immediately open to prevent loudspeaker damage. The Protect LEDs will light.
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