I recently posted a problem with a cambridge soundworks 730 which had a display problem with unreadable characters and/ or ALL of the controls would lock up after being on for 1-2 hours and could be fixed temporarily by unpluging and then pluging back in Luckily I was able to find another display board and that took care of the problem and eliminated the tuner board and the power supply board in the back as possibilities. there are several chips on this board so a service manual would be necessary to pinpoint this particular problem or a replacement board from the manufacturer OR buy a broken one on ebay that does not have the same symptoms and make one good one out of two and you will also have extra parts.BE CAREFUL WITH THE RIBBON CABLE WHEN YOU REATTACH IT TO THE DISPLAY BOARD its a little tight and must be pushed back in evenly.It might be easier to take the whole radio apart and disconnect it from the tuner board which is a straight run whereas on the display board end its at an awkward angle

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on Oct 10, 2013 • Cambridge Soundworks Audio Players &...

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Cambridge Audio Azur 640R AV Recorder won't switch off

Sounds like the unit is victim of a power surge. The power control board is probably damaged. You will be better off replacing the amp as having it repaired will cost more than replacing it.

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Mar 02, 2014 • Cambridge Audio Azur 640R 7.1 Channel...

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My Cambridge A540A just stopped last evening and the protection lamp is flashing and I have lost the manual. ng

just try it out with different watt

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Apr 15, 2012 • Cambridge Audio Azur 540A Amplifier

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I purchased a cambridge soundworks psw2 ( 3 pcs.) and i need to replace the main subwoofer speaker ( torn).any suggestions on who to go to ? i can install myself. thanks, jerry

I can't find anything for a model PSW2 but if you determine the size and look around (Google, eBay) something should pop up.

example:

http://cgi.ebay.com/CAMBRIDGE-SOUNDWORKS-12S-12-2-ohm-SUBWOOFER-SPEAKER-/220772974042?pt=Speakers_Subwoofers&hash=item3367183dda

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Apr 23, 2011 • Audio Players & Recorders

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Since gales last week and flickering house lights for over 24 hours my cambridge audio a740 won't switch on. Any connection? Not the plug fuse. Help.

Just take the top off! As long as it's unpluged from the mains you wont hurt yourself.
This is perhaps what you are looking for:

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Apr 04, 2010 • Cambridge Audio Azur 640P Amplifier

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I need a psu for a Cambridge Audio Azur 540P phono preamp

any stepdown transformer rated 12V secondary with at least 0.5A rating would do (12V, 500mAmp). I know they said to use only the supplied power unit but hey that's business! but make sure whether your mains supply is 110Vac or 220Vac.

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Mar 11, 2010 • Cambridge Audio Azur 540P Amplifier

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NO SOUND FROM DIGITAL TUNER

Hi Guys, I have been doing some research on this problem and found that during manufacture of the Cambridge Audio DAB range that they had used substandard voltage regulators in these units. I have repaired a number of theses all with similar faults and every time replacing the 5v voltage regulators with LM340T5s and capacitor upgrade from 2200uf 16v to 4700uf 16v this will solve all the problems.

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Nov 28, 2009 • Cambridge Audio Azur 640T Receiver

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I have a cambridge audio A300 V2.0 amplifier that wont power up. i've checked for power at the switch and there is power and i've checked on the main board at the fuses but there is no power there, the...

Hi there get a multimeter place across mains input on transformer,FIRSTLY DISCONNECT AMP FROM MAINS,set your meter to contiuity ,if good you should get a low ohms reading (resistance),then check the secondaries (output of transformer) either 3 wires or four going into amp board..if readings acroos all wires are low ohms then transformer is good if one is open ,transformer has had it ...hope this helps

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Dec 08, 2008 • Audio Players & Recorders

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Fluctuation in sound output on Cambridge Soundworks 5.1 speakers

Hi Paulus
A lot brand of speakers, like Sound Blasters, Logitech, Cambridge, has this (strange) kind of volume problem, sometimes, is the resistor, in the volume control, sometimes in the modulator for the board on the sound speakers, Subwofer.
I use a general tip is let the volume in one setting and don't move in the intermediate low volume say....9 .
from other thing, be change the speakers.

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Nov 25, 2007 • Cambridge Soundworks Movie Works 108...

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Cambridge audio 640a problem, olume goes to zero, I hear a little bang on speakers, light starts blinking!

Cambridge Audio Azur 640A Amplifier

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Cambridge audio 640a problem, olume goes to zero, I hear a little bang on speakers, light starts blinking!

Cambridge soundworks radio 730 display and or controls lock up

Cambridge Audio Azur 640R AV Recorder won't switch off

My Cambridge A540A just stopped last evening and the protection lamp is flashing and I have lost the manual. ng

I purchased a cambridge soundworks psw2 ( 3 pcs.) and i need to replace the main subwoofer speaker ( torn).any suggestions on who to go to ? i can install myself. thanks, jerry

Since gales last week and flickering house lights for over 24 hours my cambridge audio a740 won't switch on. Any connection? Not the plug fuse. Help.