Problem with azur 640a amp

Find out what is causing the protection light to turn on. Troubleshot down to the component level.

You are overloading your amp. IMO 640A cannot handle heavy loads.

Better change the speaker combo and connect something that puts right load on the 640A. Else, get a meaty amp from CA.

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.

Yes, you are right. That's a protection feature to prevent burnouts. Typically it appears when your speakers are sucking up a lot of load from the amp. Please check your speaker impedance and the amps' output impedance and ensure the wiring are properly done. Some amps are soo sensitive that they may cut-off after certain level due to overload.

hi,
its not because of dust. AZUR 640A offers loudspeaker protection if the output of the amplifier goes to a high constant voltage (DC) because of some internal fault. This is a rare fault although detecting it could just save those expensive loudspeakers.
Due to the necessary sensitivity of the DC protection circuit, hard clipping of the amplifier may cause DC protection to be triggered. If this fault occurs switch the unit off, power up again and check
operation with a reduced volume level. If the DC fault occurs again contact your dealer for service.
ok

Looks like the fuse blown.. or the classic symptom of electrical fault inside the amp. 640A uses a sensitive protection circuit often ends up in this irritating situation. Normally, there is nothing much you can do, but just check your wall plug connection for Open Ground or Left & Neutral reversed issues. If the wall plug is free of error, then you should better contact CA technical support.

The fault is on the amp! It sounds like the protection circuit is detecting a surge on the channel and shuts it down to protect the speaker. I would check the semiconductor device(s) for the right channel on the heatsink of the amp. You might even see damage of burning on one!

Loud buzzing normally means dc on output or through your spaeker,amplifier needs to be serviced as it is faulty

Flashing protection LED indicates there is problem with circuit. Have unit serviced

I don't think the pin or third prong on your power cord would be the problem, but I would make sure that all of your speaker wires and connections going to your amp are not shorting out against eachother.


I hope this helps you out.