Crown Audio CT875 8-Channel Rackmount Power Amplifier (75W/Channel @ 8 Ohms) - Manual (Page 9)

page 9
CT Power Amplifiers
Operation Manual
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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