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Buzzing from vr 306

My reciever starts to buzz after its been on for about an hour. Buzz comes from the receiver not the speakers. Any suggestions?

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Re: buzzing from vr 306

Sorry that I don't have a solution to your problem, but prehaps you can help me? I have lost my user manual for my vcr 306. Could I get a copy from you? I am willing to pay.

Posted on Oct 25, 2008

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Re: buzzing from vr 306

The power transfomer has a loose lamination in it. Gnerally too expensive to replace... check all the mounting screws to it are tight, sometimes a washer under 1 corner may help to rid the buz. may be the standby transfomer also, These can be replaced for much less than a mains transformer.

I have solved this sometimes in the past by giving the laminations of the transformer a strategic wack with a hammer. .

Posted on Dec 15, 2007

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I have a Boston Acoustics VR-500 Subwoofer with a problem. As soon as anything is plugged into the line level RCA jacks, the subwoofer produces a loud buzz/hum. I have tried connecting it to the subwoofer...

I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).

Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.

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This is a grounding issue either between pieces of equipment or inside the receiver itself.
There are other possible causes, but this will almost always be a grounding issue.
I recommend unplugging everything and hooking it up piece by piece till the buzz return to isolate the issue.
IE - start with nothing but the receiver and speakers hooked up. Turn on the radio. If the speakers buzz, the receiver has an issue and needs to be repaired or replaced.

If there's no buzz, hook up the DVD player. If the buzz returns, there's some issue between the DVD and the receiver....
If the buzz hasn't returned, hook up the.....<insert name of next piece of equipment here>
you get the idea.

Feb 21, 2011 | Audio & Video Receivers

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No sound comes out but my speakers buzz. What do I do? I have a Yamaha RX-V661.

Sorry but you have to get your amplifier at a technician. The buzz from the speakers means internal electronic damage at the amplifier. TAKE CARE THAT in case of keeping the speakers on the buzz noise for some seconds may destroy the speakers.

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Sounds like either a transformer or amplifier problem. You haven't reversed polarity on the speaker connections? or changed the speaker sizes, Ohms, ect? Probably a resistor, diode, or condenser in the amplifier causing feedback through the speaker system. It's doubtful both speaker coils went out at the same time. Possible, but doubtful.And you mention that the volume "SPIKES" from time to time. Could be as simple as corrosion on the volume "pot". Basically a Rheostat that allows more signal the farther you turn the knob. If so, you can clean that yourself with a spray product available at any Radio Shack. It is for cleaning electonic components and leaves no residue. You could have this checked at any competant electronics shop, but BEWARE, the "Bench Fee" to test may be more than the value of the system. I would ask what the "bench fee" was to determine a problem, and then what the labor costs would be to repair either a transformer or amplifier with resistors, diodes, capacitors, ect. Electronic equipment tends to "break down" over time and use, and sometimes you can replace a component cheaper than repair. If part of a rack system, then you may want to retain this sub-part and repair may be your choice. I would ask about the fees to test, and the costs of labor to repair, before turning it over. How old is the system?

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