Question about B&K AVR-307 Receiver

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Loud buzzing noise coming from my B&K Receiver

Hello, My B&K receiver just started making a very loud buzzing noise.  The noise eminates from the unit itself.  I have tried unplugging all the various components I had hooked up and tried unplugging the unit from my Monster surge protector box and plugging directly into the wall. Still has the problem.  Any help would be much appreciated! Thanks Brad

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  • Anonymous Apr 15, 2009

    I have an AVR-202i, and it began doing the same thing (I think). It buzzes from the unit itself, even in standby mode. If anyone responds to this, I would surely like some guidance! I'm assuming that the components are somewhat similar (they both have toroidal transformers).

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3 Suggested Answers

ginko
  • 19396 Answers

SOURCE: Protector flashing

Protet mode is a special diagnostic mode that starts when a fault is detected.

When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.

Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.

Try unplugging power cable for one hour or so. then connect cable back and see if you get rid of protect state. Sometimes accumulation of electrostatic charges inside circuit capacitors can kick in protect mode. In that case unplugging the unit from main for some times can get rid of electrostatic charges, and reset circuits by draining power completely.
If that was the problem, you will not get Protect when plugging back power cable.

If you do all the above and still get Protect, then there is a real fault.

In that case the unit may be disassembled and tested to find the fault.

If that is the case I suggest contacting the manufacturer at the number listed on the owners manual, or asking a quote on repair to a local technician.

Posted on May 29, 2009

  • 17 Answers

SOURCE: Only the front speakers work none of the surround speakers

If you are still covered by the warrenty, then you may be able to get it fixed at no cost.

Otherwise get a qualified technician (I say this to cover my but rather than suggesting that you open it up yourself) to open it up and check the fuses inside.

Posted on Aug 17, 2009

  • 11800 Answers

SOURCE: making a loud buzzing noise coming from the

 Either some shielding baffles are loose and are vibrating or the transformer itself is generating too much sound . This happens when the power extracted thru it exceeds its capacity - there's a fault/short somewhere in the electronics. You will gonna have to open it and check for the fault.

Posted on May 29, 2010

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1 Answer

10 years and first problem to repair. When you turn on and select DVD or any other selection a very loud cracking noise comes through right speaker only. So loud (with volume tuned off too) that I fear...


I think your receiver is damaged.

Try this.

Mark the speaker wires on the back of the receiver. label the speaker connected to the left channel "Left" and the speaker connected the the right channel "Right"

Also pay attention to the polarity (positive an negative) making some type of marking on your speaker wire so you can reconnect them correctly.

Disconnect both left and right speakers.

Connect the speaker wire that is labeled "Right" to the receiver's left speaker connections only then turn your receiver on.

IF the loud noise comes back, this speaker is damaged. I am guessing that the speaker is fine.

Now connect the speaker that was labeled "Left" to the receiver's right speaker connections and turn the receiver on.

IF the loud noise comes back like it did before but now playing through the "good" speaker there is a problem with your receiver.

If so, your receiver is 10 years old. Isn't it time for an upgrade? Try ebay for good used equipment deals.

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Str-da30es. reciever will have no sound ot times or loud buzzing noise. all functions will remain lit though


Then have it repaired , start with the standby circuits

Check relay drive circuits.

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Very loud buzzing from speakers. it is a yamaha rx-v563. one day everything was fine, the next started the loud buzzing.


check all connections to and from the amp. have you got animals in the house. They can accidenty pull plugs while exploring behind your units.

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Making a loud buzzing noise coming from the receiver AVR307 not through the speakers??


 Either some shielding baffles are loose and are vibrating or the transformer itself is generating too much sound . This happens when the power extracted thru it exceeds its capacity - there's a fault/short somewhere in the electronics. You will gonna have to open it and check for the fault.

May 29, 2010 | B&K AVR-307 Receiver

1 Answer

Trips and switches off


Hello Fixya customer,

Thank you for your question.

The best way to fully isolate the fault is to disconnect all the speaker wires, and verify that there are no strands of wire shorting between the speaker terminals on the rear of the unit.

Turn the volume all the way down, full CCW, and if it goes into shut down with the STBY light blinking then there is a fault in one of the amplifier's.

Thank you for using Fixya, and if I can be of further assistance please ask.

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Subwoofer problem


If you get your system up and running and hear an audible buzz or hum, the first culprit to look at is either the powered subwoofer or your reciever feed at the entry point to your system.



Dec 23, 2009 | JVC RX-6018V Receiver

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Alot of loud feedback through speakers, a loud buzzing noise


What sources make it happen or which do not? All buzzing = something in the amplifier end. is it from all speakers or just one?
One external source= RCA cables not grounded. Reconnect them tightly with a twisting motion to wipe off oxidation.

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A couple of weeks after initial setup of my brand new Onkyo XT-SR606 receiver, I noticed a loud buzzing noise that starts up approximately 10 min after the receiver is turned on. The buzzing is definitely...


The "buzz" you hear is a power hum made by the power supply transformer. It's technically called "Lamination hum" caused by the revering of electrical current through the power supply transformer. In some cases the hum can vibrate the chassis causing other loose material to vibrate. If you can, go to your dealer and check to see if other units of this same type typically make a hum this loud, and if not, see if he can solve the problem for you.

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