Question about Cambridge Audio Azur 640A Amplifier

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My CA Azur 640A v2 just cannot get out from standby because of protection circuit. the red light blinks showing that DC was measured at terminals, no matter if speaker cables are pluged in or not. In user's manual it's written if DC is detected protection shuts down the amplifier in the middle of operation - which is obviously not my situation. Even more strange is that sometimes (very rarelly) it starts normally and I can play music as loud as I want without any fault in sound. But next time again nothing.

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Most 640As suffer from this sensitive issue. It is not a fault, but a protection mechanism that is too sensitive. In some cases, it could be due to the open ground earth issue or Left & Neutral reversed at the wall plug. Check your wall plug's connection and if they are perfect, then it could be because of a electrical issue inside the amp. In that case, get the technical support from CA to fix this.

Posted on Mar 06, 2011

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1 Answer

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1 Answer

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http://www.cambridgeaudio.com/support_products.php?PID=105&Title=Support
Hope this may help.f3aab94.jpg

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