Question about Cambridge Audio Azur 650a 2Channel Amplifier

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I just bought the Cambridge 650A amp. The sound is great, however, it annoys me that the amp will go to Protection (3 bursts- out of operation range) when I swithch on the amp (either from standby or power on). I need to switch off the amp for several times until it warms up and then I can enjoy the music. I tried to take off all the input and output wires, the situation is the sam. Is this a fault?

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Grubhead
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SOURCE: 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.

Posted on Feb 19, 2011

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1 Answer

Why does my Cambridge Audio Azur 851W power down even when a signal is operating.


amps like this only power down when there is a problem with the amp, usually a shorted output stage, but could also be shorted speaker wires or damaged speakers, it's a self protection mechanism

do you get sound from both speakers before it powers down?? if you do it is definitely an internal problem so take it to a repair facility,,,

if not check the speaker cables & the speakers themselve

Feb 22, 2015 | Cambridge Audio Audio Players & Recorders

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Cambridge Audio Azur 650A service manual


try:
http://www.excelia-hifi.cz/cambridge-audio/manual/cambridge-audio-azur-550a-650a.pdf
Is the user manual try the OEM for the service manual, most OEMs will require you to be qualified to do the repair.

Oct 04, 2014 | Audio Players & Recorders

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Running four S70 Siroccos off the amp, everytime volume gets halfway the protection is cutting in with protection light flashing three times? When reducing down to two speakers amp cuts out three quarters...


You are overloading your amp. IMO 640A cannot handle heavy loads.

Better change the speaker combo and connect something that puts right load on the 640A. Else, get a meaty amp from CA.

Mar 04, 2011 | Cambridge Audio Azur 640A Amplifier

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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...


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.

Feb 16, 2011 | Cambridge Audio Azur 650a 2Channel...

1 Answer

Amp keeps cuting out when you increase vol


Generally speaking, an amp protects itself from heat, shorts and overloads.


Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.

Jan 30, 2011 | Cambridge Audio Azur 650a 2Channel...

1 Answer

Cambridge azur amp 640a working brill till yesterday !! now protection light !!!! turned it off numerous time etc plenty of venterlation carnt get it to work


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.

Dec 08, 2010 | Cambridge Audio Azur 640A Amplifier

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The amp won't power up. The cord is is, the power is on, but when I press the Standby/On button, the MP3 LED blinks a few times, then it goes off and all the LEDs, from the protection, speaker A, B and so...


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.

Aug 21, 2010 | Cambridge Audio Azur 650a 2Channel...

1 Answer

I have cambridge audio azur 640a amp. Problem I have is only the one speaker is working. Both speakers seem to be ok working off the left speaker terminal. Seems to be problem with output from right...


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!

Dec 29, 2009 | Cambridge Audio Azur 640A Amplifier

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