Question about Cambridge Audio Azur 640A Amplifier

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Fried up Ic no.(U33D22JN) NE5532P

I replaced Ics no. 5316 & 5222 on my cambridge 540A audio amp.O powering it , the volume knob automatically turned itself down frying up Ic no.NE5532p on the volume control circuit.What could be the problem?

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Posted on Jan 02, 2017

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SOURCE: Probvlam with my cambridge audio 640 a cutting out

Check operations manual for indications as you described. Amps MUST have adequate ventilation. Make sure unit is not in small, semi- closed space or on top of other warm equipment. Check for speaker impedences match that of amp

Posted on May 30, 2008

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SOURCE: cambridge 540A something blew up when connecting input to amp!

looks like the input switching ic, has given up. it is advisable to change the input impedance resistors to 1k, there are about 14 of them, the original value was 100 ohm.

Posted on Oct 26, 2008

  • 1 Answer

SOURCE: can't connect amp to speakers

Hi look at the end of speaker terminals, you will find tiny plastic caps , get a small screwdriver toease them out, you can plug banana clips straight in as I have done.Hope this helps

Posted on May 15, 2009

  • 150 Answers

SOURCE: I use an azur intregrated amp 540A and a Azur Pre

I've never repaired one of these but I have an amp at home that makes a intermittent static "popping" noise that i'm going to put down to a dirty volume pot (control) that needs cleaning. I will also have to change some of the electro capacitors that have dried up inside which cause "shot noise". With the right lubricant (electrical contact cleaner, nothing else) you could take to lid off and spray a small 1 second blast into the hole of the pot and any other balance or tone control yourself but I would take it to the electronics repairer to get the capacitors checked over.
My theory only
Good Luck!

Posted on Jan 17, 2010

dunnbiker
  • 8546 Answers

SOURCE: HI, Can the Cambridge Audio 640a integrated amp

Of course, just run an audio RCA pair out from the Pre Out to your next amp and any input. All control for volume, tone, etc will remain with the 640A.

Posted on Jan 26, 2011

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1 Answer

Protection light comes on and volume returns to zero. I am using a Azur 540A. This issue occurs when I ride the volume above a certain point, which is NOT any higher than i've been running it for years....


Protection circuits respond to overloads. Unless the protection circuit is faulty there is probably something wrong with the power amp parts located on the heat sink.
It would be a good idea to have the top cover off (on power) and listen for that noise to try and pin it down what is making it.

Aug 24, 2013 | Cambridge Audio Azur 540A Amplifier

1 Answer

Cambridge audio Azur 540a repair


Open your amplifier then find the power relay inside push the power button and observed the relay if active. If so the measure the voltage on large capacitors. But if the relay is not active check the relay drive transistor and the blocking diode across the coil.

Oct 05, 2012 | Cambridge Audio Azur 540A Amplifier

3 Answers

Volume goes to zero and protection light comes on, any idea what the problem is?


Check the speaker wires for a short. Try operating the amp without the speaker wires hooked up.

Feb 27, 2011 | Cambridge Audio Azur 540A Amplifier

1 Answer

Low volume through amplifier


Turntables generate a very low signal. Phono inputs on receivers containa pre-amp section to boost the signal to "line level" or the same level as other audio devices. I would suspect that you need to add that pre-amp section. Phono preamps are available for around $20 or so and are inserted between the turntable and the standard audio input on the receiver or amp.

Hope this helps,
Dan

Apr 15, 2010 | Cambridge Audio Azur 540A Amplifier

1 Answer

I use an azur intregrated amp 540A and a Azur Pre amp 640P. When first power up, The amp makes a popping sound and the volume turns down. Some times it can pop 2 or 3 times within a few minutes. Then it...


I've never repaired one of these but I have an amp at home that makes a intermittent static "popping" noise that i'm going to put down to a dirty volume pot (control) that needs cleaning. I will also have to change some of the electro capacitors that have dried up inside which cause "shot noise". With the right lubricant (electrical contact cleaner, nothing else) you could take to lid off and spray a small 1 second blast into the hole of the pot and any other balance or tone control yourself but I would take it to the electronics repairer to get the capacitors checked over.
My theory only
Good Luck!

Jan 17, 2010 | Cambridge Audio Azur 540A Amplifier

1 Answer

Left output ports for both left and right channels do not work


Hi, first thing to do is to check the power supply look for a larger capacitor & using voltmeter measure both sides from ground to positive & ground to negative. Next check the speaker protection circuit if active. If not active measure the voltage from ground to the speaker output before the relay of speaker protection device. The voltage should be zero or close to zero volt. If more then the power transistor or power IC is toasted.

Aug 10, 2009 | Cambridge Audio Azur 540A Amplifier

2 Answers

Can't connect amp to speakers


MOST amps have a small plastic plug in the center of the amps speaker output sockets use a small screw to pull these out.
CABLE GUY.

Feb 22, 2009 | Cambridge Audio Azur 540A Amplifier

1 Answer

Speaker Connection


Put teh wire of the cable in the side of the plugs once you have untwisted them - they dont come out.

Feb 16, 2008 | Cambridge Audio Azur 540D

3 Answers

Cambridge 540A something blew up when connecting input to amp!


mmmm... i had a problem like this before, it seems that you have blown a IC or 2 or 3... if you have blown all your channels IC's then it would be better to buy a new amp, it also depends on what watts your amp is... if it isn't a very high watt amp then it wouldn't be that much to fix, if u only blown 1 or 2 Ic in a channel then let it get fixed, and NEVER switch ports if your amp is still running/playing... its like fixing your car when the motor is running...

Dec 17, 2007 | Cambridge Audio Azur 640A Amplifier

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