Question about Kenwood VR-7070 Receiver

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Constant buzzing sound in all speakers

I have constant buzzing sound in all of my speakers. Everything has been hooked up the same for years and it just started buzzing. Every once in a while the sound will go completely crazy and the volume will spike and be very loud. I turn off the receiver and turn it back on and then it works again but the buzz is still there.

I have tried unplugging everything. Taking the reciever to another room of the house and just plugging in the speakers with no other components connected and there is still a buzzing sound comming out of the speakers .

not sure what to do.

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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?

Posted on Sep 26, 2009

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