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Cambridge Audio Azur 540A Amplifier Questions & Answers
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.
Protection light comes on and volume returns to
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.
Amp keeps turning itself down - cant turn off 'protection'
yes,pls.stop plugging the system,you may harm your system if you do so,the system has it's own system analysis mode,and if there's something wrong in the circuitry,it will activate,you need the authorize service center my friend,it's a technical problem.
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!
I have a red protection
Normally this means that the power supply or the load is incorrect.
Have you very low impedance speakers ?
Have you tried disconnecting speakers from amp and powering it on.
If it does and you do not get any protection light you need to investigate your speakers.
When i try turn it
This is a common question on this site. Amps of all types have protection circuits to keep them from doing a self meltdown. Testing follows this logic.
1. Remove all speaker wires.
2. Keep the volume down - all the way.
3. Turn the unit on.
4. If it does not trip off, then there is a problem either in a speaker or the wiring.
a. Reconnect one at a time until/unless it trips off
b. That will tell you where to look further.
If it does trip off, then there is an internal circuit issue in the amp and probably requires professional help to fix.
When you switch the amplifier on there is a strong
If the noise does not go away when you turn the volume control down the problem is in the output stage. If the noise is in one channel, then you should only look at that channel. Use the other good channel as a guide to what is working. If in both channels then it can only be something common to both channels. The bad news is that anything can cause noise.
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