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Front Panel
(1) Power Indicator
The green LED indicates AC power is supplied to the unit‚ the power switch is on and the unit is functional with no faults. If the amplifier has a thermal fault condition‚ this LED will not illuminate.
(2) Signal Indicators
Yellow LEDs indicate signal presence at that specific channel output. Identical on each channel.
(3) Clip (SPS™) Indicators
Any time a channel is driven into hard, continuous clipping, the SPS circuit will automatically reduce the channel gain to a level just slightly into clipping, guarding the speakers against the damaging high power continuous square waves that may be produced. Situations that may activate the SPS circuit include uncontrolled feedback, oscillations, or an improper equipment setting or malfunction upstream from the amplifier. On the ICS™ 4200, normal program transients will not trigger SPS; only steady, excessive clipping will. The LEDs will illuminate red when SPS circuitry is active for each channel amplifier.
(4) Input Level Controls
These controls adjust the signal level to the power amplifier inputs. Maximum input sensitivity is achieved at the fully clockwise setting. These controls are detented to allow the input sensitivity of the channels to be closely matched. This is essential in the
(5) AC Power Switch/Circuit Breaker
The ICS™ 4200 amplifier has a combination AC switch/circuit breaker on the front panel. If the switch shuts off during normal use, push it back to the ON position once. If it will not stay on, the amplifier needs servicing.
Warning: The power switch does not break both sides of the line and under certain conditions‚ hazardous energy can be present when the switch is in the OFF position.
(6) Cooling Air Vent
The ICS 4200 is designed to operate under extreme conditions. Part of this design includes the air vents visible from the front of the unit. These openings should never be blocked.
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