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Just set up my brand new cambridge audio azur 650a amplifier. It keeps cutting out with the protection light blinking three times indicating "overvoltage" according to the manual. I'm using it at very low volumes and one pair of speakers is connected in the back via banana plugs. the only connected component is a rega turntable through the cambridge audio 640p preamp and into the amp's Aux input. Any suggestions?
Re: Just set up my brand new cambridge audio azur 650a...
Just make certain that the connections are all good with no wires touching. If it still doesn't perform after that return it to where you bought it and get a new replacement or your money back.
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Yes, you are right. That's a protection feature to prevent burnouts. Typically it appears when your speakers are sucking up a lot of load from the amp. Please check your speaker impedance and the amps' output impedance and ensure the wiring are properly done. Some amps are soo sensitive that they may cut-off after certain level due to overload.
Looks like the fuse blown.. or the classic symptom of electrical fault inside the amp. 640A uses a sensitive protection circuit often ends up in this irritating situation. Normally, there is nothing much you can do, but just check your wall plug connection for Open Ground or Left & Neutral reversed issues. If the wall plug is free of error, then you should better contact CA technical support.
Hi...
If all the speakers are connected properly then I would say, there is a failure in either the power supply filtering caps or one output has failed and it's going into Protect mode to keep from frying the speakers
It will require service at that point.
The fault is on the amp! It sounds like the protection circuit is detecting a surge on the channel and shuts it down to protect the speaker. I would check the semiconductor device(s) for the right channel on the heatsink of the amp. You might even see damage of burning on one!
have the volume control cleaned by a spray of electronic contact cleaner. If the carbon coating material is already wiped-out due to use, have the part replaced
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