Cambridge Audio Azur 340A amp not responding to remote
My Cambridge Audio Azur 304a amp has suddenly stopped responding to the volume controls on the remote control though every other remote function works. This happened when I was testing another brand amp next to the Azur. Strangely, the other amp (a Marantz) is responding to Azur remote volume controls...so I know the volume buttons on the Azur Remote is working - except not on my Azur amp itself. I shud also add that during my testing the Marantz, the Azur was responding to my Marantz remote (but this has stopped since). Any idea how to rectify this and get my Azur to respond again to its rightful remote?
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If your Cambridge Audio Azur 640A V2.0 amplifier is not responding to the volume buttons on the remote control, there could be a few possible causes. Here are a few things you can try:
Check the batteries: Make sure that the batteries in the remote control are fresh and inserted correctly.
Check the remote sensor: Make sure that the remote sensor on the amplifier is not blocked or covered by anything. Also, ensure that the remote sensor is pointing towards the remote control.
Check the remote control functions: Make sure that the remote control is in the correct mode, and that you are pressing the correct buttons for the volume control.
Check the connection: Make sure all the connections between the amplifier and other components are secure and tight.
Check the potentiometer: The potentiometer (also known as the volume control) is the component responsible for controlling the volume of the amplifier. If the potentiometer is not functioning properly, then the amplifier will not respond to the volume buttons on the remote control.
Contact Cambridge Audio: If you have tried all of the above steps and are still unable to get the remote control to work, contact Cambridge Audio technical support for further assistance. They will be able to provide you with additional troubleshooting steps or advice, or they may need to send a technician to repair or replace the amplifier
What ohm rating does the receiver have and what ohm speakers are you connecting. If the receiver is rated for 8 ohm speakers and you are connecting 4 ohm speakers, you are overdriving the amplifier. This will cause the protection to trip. Also make sure your speakers polarity are matched. If they are out of phase this may also cause a problem.
The volume control is a resistor ladder controlled by software. If powering off the unit for an hour doesn't fix it, I would imagine that one of the "steps" has a problem. Contact your dealer or visit http://support.cambridgeaudio.com/.
Might be a weak relay or transistor in that channel, they both will stop and reset when overheated. make sure you're ready to test it when it does this again, this may help you locate the bad component. I'm leaning towards the transitor, because they also amplify sound signals in radio frequency.
Start with the basics first. 1. With the amp on, in each imput socket plug a dual end phono cable in and touch the right and left plugs with your finger. You should get a buzz on each speaker. No buzz and the channel at that terminal is not working. If none of the terminals buzz. Then the amp is dead.
If some buzz and others not you have a pre-amp problem.
2: Amp Dead. Could be A power supply. B main pre-amp. C Power Amp.
The power supply check for a fuse.
The main pre-amp will only effect both channels if an IC controls both.
The Power Amp will again only loose both channels generally if it is an IC. It will be attached to a big heat sink and have lots of pins comming from it.
If it uses transistors for the main amp, you can check these with an Ohm meter. With the power off place the leads on each terminal of each transistor. If the meter goes fully over (like when you touch the leads together) each way it has shorted.
The thing to remember when repairing stereo amps. Is that the amp is two identical amps joined together. So what happens one side will happen on the other. If both channels don't work look for something that is common to both.
PS never heard of 'cliperd'.