840A Class XD integrated amplifier
"OVERLOAD" indication. The amplifier will stay in this state until the Standby/ON switch is pressed to reset it.
Remedy - The resistance on the loudspeaker terminals is too low. Check to see if there is a short circuit between the loudspeaker terminals.
Note: If the indication remains the same and multiple loudspeakers are being used on each loudspeaker output then please remove a pair and retry. If too many loudspeakers are connected to any amplifier causing the load resistance to drop too low the amplifier will be overloaded. CAP5 will detect this situation. If the indication remains the same with only one set of loudspeakers connected, there may be a fault with one or both of the loudspeakers.
4. Short circuit detection
Indication - Unit has not come out of Standby, display flashes “SPKR SHORT”.
Mode
Volume
Description - 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 (display flashes “SPKR CHECK”). 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
Remedy - User related fault. There may be a short circuit between the loudspeaker terminals. Check all loudspeaker connections before attempting to switch the unit out of Standby (display will flash “SPKR CHECK” then “SPKR OK” when short circuit fixed).
It is possible to disable the short circuit detection feature by pressing the SHORT DT button to off when in the 840A System Configure menu. This would only be required if the loudspeakers have very low DC resistance.
5. Intelligent clipping detection
Indication - Volume is reduced automatically, “CLIPPING” appears on the front panel display.
Mode
Volume
Description - CAP5 has the ability to detect when the amplifier starts to clip or overdrive at its output, which can damage loudspeakers, and
degrade the sound. Clipping distortion |
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is caused at high volume levels when |
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the output signal attempts to go |
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outside the maximum voltage that the |
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amplifier can provide, causing the tops |
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of the signal to flatten off. When CAP5 |
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detects clipping the volume will be |
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automatically reduced down until CAP5 |
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detects an undistorted output. |
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It is possible to disable the clipping detection feature by pressing the CLIP DT button to off when in the 840A System Configure menu.
Note: Disabling the clipping detection is not advised as this feature has been added deliberately to protect the amplifier and loudspeakers.
Azur Class XD integrated amplifier 21