Crown COMTECH DRIVECORE CT 875 - Manual (Page 10)

Operation Manual
CT Power Amplifiers
page 10
6 Front Panel
1. Fault Indicator
• Red LED
• One per output channel
• Flashes when the amplifier output channel has
stopped operating. Usually this means that the
amplifier must be serviced. (See Section 15
Troubleshooting)
2. Thermal Indicator
• Red LED
• One per output channel
• If exceeds Thermal Limits, output channels will
shut down in pairs until thermal levels are within
tolerant ranges.
• Illuminates when the channel approaches
temperature constraints or is about to shut
down. Audible distortion may be heard.
• Unit stops amplification for each channel until
temperature returns to acceptable level. Once
the amp cools off enough, led turns off, audio
starts again.
3. Clip Indicator
• Red LED
• One per output channel
• Illuminates when the channel is at the threshold
of audible distortion (See Section 15
Troubleshooting – reduce input level)
• When the limiter is turned on the Clip Indicator
will illuminate when the limiter is protecting the
amplifier from input overload.
4. Signal Indicator
• Green LED
• One per input channel
• Illuminates when the input signal exceeds
-24dBu
5. Ready Indicator
• Green LED
• One per input channel
• Illuminates when the channel is ready for signal
• Illuminates when the channel is initialized and
ready to produce audio output.
• Ready indicator will flash when the channel
is in standby.
• Ready Indictor will not illuminate or flash when
the amplifier is in deep sleep.
6. Power Indicator
• Blue LED
• Indicates AC power has been applied and is
within the safe operating range of the power
supply. The LED will flash when the AC line
voltage is above or below the nominal rated
value. The LED will also flash when the
amplifier is in Deep Sleep mode AND the power
button has been pushed.
7. Data Indicator
• Yellow LED (not functional in analog version)
• Indicates network activity
• Reserved for future releases (Lite and DSP)
8. Power Button
• On/off push button
9. Cooling Vent
• Allows for air flow and cooling of the amplifier
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