Question about B&K AVR-202

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Amp buzzing i have a B&K AVR 202 amp,and it started buzzing thru my speakers as soon as i power up the amp,can you tell me what the problem is

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  • jeffreylwong Nov 14, 2008

    I have the same issue. There is a low level, persistent buzz. It gets covered up by music, but I'm sure the buzzing is going on in the background.




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3 Suggested Answers

hawkwatcher
  • 67 Answers

SOURCE: Buzz or hum

My guess would be +and -12v supply to preamp opamps has ripple. (drycaps or bad solder). I may be able to get you a pdf service manual if needed. kstahl65@att.net

Posted on Jan 31, 2008

petraman7
  • 1175 Answers

SOURCE: I have a buzz / static that appears for the first 15 minutes.

Hi...

I just opened up an AVR3300..It's trouble is that it goes into stndby
at once.
The BIG power supply caps are VERY swelled at the top.

That would be my informed view on why it's bad.

I suggest you look at that being your possible trouble too.

Scott in Vermont

Posted on Jul 09, 2009

dunnbiker
  • 8546 Answers

SOURCE: I get no sound out of right front speaker.

Possibly. Try swapping the other speaker to that channel to decide.

Posted on Dec 09, 2010

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I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.

If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.

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No Audio in HDMI THRU Onkyo HT-R380 Receiver


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My B&K AVR 202 will not come out of standby.


hi,

Check the speakers first. Remove all the speakers from the amplifier and switch ON the amplifier. If the amplifier switch ON from standby without any trouble then any one of the speaker is damged or the wiring to the speaker have some problem. . if it doesn't switch ON from standby there is internal hardware faulty.
IF so Please take it any good electronic reparing shope near you. Becuase you hve to check the voltages at all the outputs of the amplifiers. In this amplifier user can't do any thing. To work wit this amplifer need a throuh knowledge in electronics. If you do someting wrong the amp will became irreparable, because its amplifier stage work in high ampere power supply.
OK

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Can I connect 4 ohms speakers on the AVR 230? Thanks


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Output impedence of 95% of Herman Kardon sets are desighed for 6 Ohms speaker. There is an output speaker sensor circutary it it which sense the impedence of the connected speaker. it is a built in feedback circuit and is ment for protection for both speakers and power amplifier section of the amp. If you connect a 4 Ohms speaker, the set will sense it and there is a chance to get it tripped as you increase the volume. Just connect and check. Advance the volume of the set very gently. If tripping occurs or it just cut off as soon as switch ON, never connect it again. OK.

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Will bose 901 speakers work with a AVR-4308CI


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1 Answer

I have a buzz / static that appears for the first 15 minutes.


Hi...

I just opened up an AVR3300..It's trouble is that it goes into stndby
at once.
The BIG power supply caps are VERY swelled at the top.

That would be my informed view on why it's bad.

I suggest you look at that being your possible trouble too.

Scott in Vermont

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My Fender Bassman 100 amp keeps buzzing.


Part of the power supply is a filtering stage that completes the conversion from AC current to DC. The "cap" is a capacitor that furnishes voltage to help smooth the alternating current that is left from the rectifier stage. These will start to fail over time. While it is a relatively simple repair for anyone that does this for a living, I would not suggest this as your first repair. Expect a parts cost inthe $20 range plus the local labor rate for the entire repair.

Dan

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