Question about B&K AVR-307 Receiver

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I have a b&k 307 that's makes the buzzing noise. How can i check the fault/short in the receiver.

Buzzing noise when i turn the receiver on but the unit stills plays but with the noise.

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Your ground it not ok

Posted on Dec 03, 2014

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Posted on Dec 03, 2014

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1 Answer

I can't get any sound through my Sony ps t3 turntable. Any help would be appreciated


First determine if your amp is working. You can do this by putting your finger on the phono plugs that comes out from the terminals that your deck fits in. You should hear a buzz (if it's switched on). If you don't get a buzz then the pre-amp inside your amp may be faulty. This pre-amp failure will not affect any other functions on your Receiver.
Next thing to check is if the signal from the cartridge can reach the amp. You do this by removing the wires from the cartridge. While the amp is on and deck connected to it. Touch with your finger (one at a time) each of the four wires. On two you will little or no noise. On the other two you should hear on the left hand channel a buzz from one wire and on the other wire a buzz on the right. If you hear no buzz and the amp is working OK then there's a fault in the wires to the turntable or inside the deck.
If that is good, then you might need to make certain that connections to the cartridge are good.

Nov 02, 2014 | Audio Players & Recorders

1 Answer

Clip light is on volume is low


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers

Nov 30, 2011 | Kenwood VR-307 Receiver

1 Answer

We have a Marantz sr4500, everytime we put it on it makes a Zzzzzz sound and then it turns off with a loud "buk" sound and shows protect on the amp's screen, after few seconds the amp turns...


It is not so easy to probe into to find a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.In this case I think that some capacitors are faulty as when the set is put on it charges on to make the amplifier work. Possible fault in the protect circuit or preamp.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.

May 11, 2011 | Marantz SR4500 Receiver

1 Answer

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

My amp and cable are working... but my guitar wont make sound... when i turn up the amp it makes white noise... HELP!!!


PLUG YOUR LEAD INTO AMP TURN UP JUST A LITTLE SEE IF IT BUZZES WHEN YOU TOUCH THE END OF YOUR CABLE.IF IT BUZZES THEN THE FAULT IS IN YOUR GUITAR MOST LIKELY THE ACTIVE WIRE HAS COME OFF THE INTERNAL GUITAR PLUG.

Nov 04, 2009 | Peavey Music

1 Answer

No power


there is a electrical fault, like a short, it seems to have shut down for safety reasons, call repairman

Jul 14, 2009 | Kenmore 92320 / 92321 / 92322 / 92324...

2 Answers

I have just purchased a Yamaha EG012 and a Yamaha GA-15 Amplifier. I've followed the instructions adn plugged everything in, but when i turn on the amp and adjust the volumes there is just a buzzing noise...


You may have a switch with 2 settings somewhere on your amp - one for active and one for passive. try changing that.

If this doesn't work, make sure you got the guitar in the line input, change the lead for another incase it's faulty, turn the volume up on the guitar to activate the pickups, and rock-out when you find the problem and fix it.

Dec 30, 2008 | Yamaha Electric Guitar

1 Answer

MY FENDER GUITAR AMPLIFIER IS MAKING A HUMMING BUZZING NOISE


Not sure yet, but before considering a fault with the amp, does it only make this humming noise when not plugged into the guitar? I am thinking that the cable might be faulty.

If it while the cable is plugged in the guitar, does the humming disappear when you turn the volume control(s) down on the guitar? I am thinking that one or pickups may be faulty.

Sep 14, 2008 | Audio Players & Recorders

3 Answers

Repetitive buzzing noise


Some componet in the Amp circuit is breaking down. The longer you let this go, the more of a chance that you will have a major short and blow out several parts,m as thats what happens with amps. Get it service asap and dont use it.

Sep 01, 2006 | Cambridge Soundworks BassCube 12 Speaker

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