Operation Manual; 1. Fault Indicator; 2. Thermal Indicator- Page 10

Crown CT 475 User Manual

2014 Dodge Charger SRT Owner Manual
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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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Detailed Information for Crown CT 475 User Manual

Lists of information found in Crown CT 475 User Manual - Page 10

  • 1. Fault Indicator • Red LED • One per output channel • Flashes when the amplifier output channel has stopped operating.
  • 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.
  • 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.
  • 6. Power Indicator • Blue LED • Indicates AC power has been applied and is within the safe operating range of the power supply.
  • 7. Data Indicator • Yellow LED (not functional in analog version) • Indicates network activity • Reserved for future releases (Lite and DSP) 8.
  • Red LED • One per output channel • Flashes when the amplifier output channel has stopped operating.
  • 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.
  • Unit stops amplification for each channel until temperature returns to acceptable level.
  • 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.
  • Green LED • One per input channel • Illuminates when the input signal exceeds -24dBu 5.
  • 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.
  • Blue LED • Indicates AC power has been applied and is within the safe operating range of the power supply.
  • Yellow LED (not functional in analog version) • Indicates network activity • Reserved for future releases (Lite and DSP) 8.
  • On/off push button 9.

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