Question about Cambridge Audio Azur 640A Amplifier

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

Hi,
I've had a cambridge audio azur 540A for a year or so and decided to unplug the cable from 1 source (mp3 player) and connect it to another (a cd player), while the amp was switched on.
I'd done this loads of times before and never had any problems.
Unfortunately, this time, something went wrong... I got a bit of an electric shock and no sound came out of the amp. Shortly after i could smell some burnt circuitry emanating from the amp.
I've definitely blown something, but am not sure what and would like to see if it's worth repairing or just getting a new amp.

I'd even be up for opening the machine up and having a look around inside to see if there's a fuse that can easily be replaced, but actually getting inside the beast is pretty tricky - it has some weird allen key / screw things which it looks like you need a special screwdriver to open.

Anyway, if anyone can offer any advice about how to fix, or even recommend a place to take the amp to get it looked at, it would be much appreciated!!!

cheers,
Rupert

Posted by on

  • rupert_h Oct 27, 2008

    thanks for your help!
    In the end i replaced the amp as to fix it would have cost a similar amount. However, I've learned my lesson - always switch your amp off if you're gonna be disconnecting stuff! Mucha gracias.
    Rupert


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As you've replaced the amp already, this is now a mute point. Just FYI, those screws are called Torx screws. They were at one time, hard to get a tool for, (an early means off keeping the consumer out of the product) but now a days, you can buy Torx drivers just about anywhere.

Dave

Posted on Sep 27, 2012

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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

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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...

Posted on Dec 19, 2007

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