Front Panel; Back Panel - Crown ComTech DriveCore CT 475 Operation Manual

6 Front Panel

1 2
1. Fault indicator 3. clip indicator
• Red LED • Red LED
• One per output channel • One per output channel
• Flashes when the amplifier output channel has • Illuminates when the channel is at the threshold
stopped operating. Usually this means that the of audible distortion (See Section 15
amplifier must be serviced. (See Section 15 Troubleshooting – reduce input level)
Troubleshooting)
• When the limiter is turned on the Clip Indicator
will illuminate when the limiter is protecting the
2. Thermal indicator
amplifier from input overload.
• Red LED
4. Signal indicator
• One per output channel
• Green LED
• If exceeds Thermal Limits, output channels will
shut down in pairs until thermal levels are within • One per input channel
tolerant ranges.
• Illuminates when the input signal exceeds
• Illuminates when the channel approaches -24dBu
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.
page 10
CT Power Amplifiers
5 4 3 9 6 7 8
5. Ready indicator 7. data indicator
• Green LED • Yellow LED (not functional in analog version)
• One per input channel • Indicates network activity
• Illuminates when the channel is ready for signal • Reserved for future releases (Lite and DSP)
• Illuminates when the channel is initialized and
8. Power Button
ready to produce audio output.
• On/off push button
• Ready indicator will flash when the channel
is in standby.
9. cooling Vent
• Ready Indictor will not illuminate or flash when
• Allows for air flow and cooling of the amplifier
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.
Operation Manual
CT Power Amplifiers

7 Back Panel

1 2 3 4 5
1. Ac Power inlet 4. Amp configuration diP Switches (see Amp
• Standard IEC type 320 inlet for detachable
connector
• 100-240V
2. Reset Button/Breaker
• Push button switch
• Resets the circuit breaker that protects the power
supply
• A circuit breaker located near the IEC power inlet
protects the amplifier from excessive AC current
draw.
3. Auxiliary connector
• 3-pin Phoenix type connector
• Allows for amp to be placed in deeP SLeeP
mode and monitoring of AMP STATUS
(see Section 10.2)
Operation Manual
6 5 6 7
5. Amp input connectors
Status/Configuration in section 10.2)
• 3-pin block connector can be used per input
• Switches 1-5 turn specific settings on and off:
• High impedance balanced
-70 Hz HPF (High Pass Filter
6. channel Level controls
- see Section 8.1)
• One 21-position detented rotary attenuator per
-Auto-Standby
channel
-Amp Status
• Attenuation range from -100dB to 0dB
-Green Power (See Section 9.2)
-Limiter
7. Output Speaker connector
• Switches 6-12 sends input channel audio signal
• 4-pin Barrier block type per two channels
to corresponding output channel and adjacent
(2-Pin or 8-Pin Phoenix can be used)
output channel. In four channel model, switch
6-9 are non-functional, (see section 11)
page 11