1. One flash with long pause between flashes:
Please contact your dealer for service
CAP5 offers loudspeaker protection if the output of the amplifier goes to a high constant voltage (DC) because of some internal fault. This is a rare fault although detecting it could just save those expensive loudspeakers.
Due to the necessary sensitivity of the DC protection circuit, extremely hard clipping of the amplifier may cause DC protection to be triggered.
2. Two quick flashes with long pause between flashes:
Leave the unit for 15 minutes to cool down before pressing the Standby button to resume normal operation
Over temperature is caused by a combination of high listening levels and low impedance speakers. CAP5 includes temperature detection which constantly monitors the heat generated by the output transistors. If the monitored temperature reaches a high level (suitably within the limits of the output devices) the amplifier will automatically switch into a fault mode. The unit should ideally be left for 15 minutes in this state to cool down adequately. If the unit has not fully cooled down then the temperature may reach the limit soon after the amplifier is powered up. If the loudspeaker impedance is low the temperature of the amplifier may rise faster as the amplifier is working harder. If the amplifier is mounted in a cabinet or the ventilation slots are obstructed the over temperature detection may activate/reactivate after a short listening time.
3. Three quick flashes with long pause between flashes
Reduce the volume
If distortion is still present, check the speaker connections and ratings.
CAP5 offers V/I (voltage/current) protection by constantly monitoring the output transistors to keep them working inside their Safe Operating Area (SOA). The SOA is a set of limits given by the output transistor manufacturer to ensure reliability. The V/I protection has been incorporated within the amplifier circuitry to provide a fast response to temporary overload conditions. When the V/I protection is triggered the unit will continue to operate but distortion may be heard as the unit protects the output transistors.
Check the specifications of your speakers to ensure that they are compatible with the CXA61/81
Both amplifiers can be used with speakers with an impedance of between 4 and 8 Ohms.
The CXA61 outputs 60W RMS into 8 Ohms and 90W RMS into 4 Ohms, while the CXA81/81 Mk II outputs 80W RMS into 8 Ohms and 120W RMS into 4 Ohms.
If your connected speakers fall outside of these specifications, then this could also be a reason for CAP5 protection being activated.
4. Four quick flashes with long pause between flashes
Check all loudspeaker connections before attempting to switch the unit out of Standby
There may be a short circuit between the loudspeaker terminals.
During power up from Standby CAP5 performs a check on the loudspeaker terminals to see if a short across the terminals has been accidentally introduced. If the resistance measured across the loudspeaker terminals is too low the unit will stay in Standby mode until the fault has been removed and Power up is re-attempted.