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Speakers humming. No reception.

Tried new speakers. Nothing. Electric burning smell coming from receiver.
When I turn on receiver, all I get is a loud humming sound from bothe speakers. No reception from radio, turntable, tape deck or CD player.

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The audio amplifier in the unit has failed, and that's what you smell. Turn it off and quit using it immediately - it presents a fire hazard. It might be possible to replace the bad parts. Depending on what it cost, you might want to take it somewhere for a repair estimate, but be prepared to learn it might not be fixable. Often the burned parts damage the circuit board as well.

Usually this happens in small stereo systems because of running them at high volumes for a long time. If you want to listen to loud music, you would be better off putting the money into a higher-power system.

Posted on Dec 09, 2008

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1 Answer

Tv and speakers buzzing noise


If the hum is a low note continuous hum, its at 'mains' frequency. The power cables to the unit (or inside it) are getting too close to the cables that carry sound signals to the center speaker. The mains power naturally hums and if mains wires are near to audio kit wires they pick up this sound and play it through their system/speakers. Check the wires to and from it make sure the connections are good and firm. Seperate these wires by at least one inch from any power cables, use tape to hold them down and away from each other.

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This sounds like an internal amplifier problem. Did you smell anything burn? Try turning it off completely and plugging it to a different outlet.

If all else fails, have it checked by an electronics technician...

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Acoustic Research Model AW871 wireless sterio speakers


Your connection between the AR transmitter and the ONKYO receiver sounds solid. I'd guess it's the wireless speakers that are the wrong point, or at least that's what I'd look at first. Doing a bit of research, I noticed a couple minor points. First, these seem prone to RF interference from other RF devices. Have to tried switching channels on them? Second, someone reported theirs would not work properly unless the speakers were turned on just before the transmitter, and turned off shortly after the transmitter. Apparently you have to hold the button on the front in for 5 seconds to turn the speakers on or off. I know that's rather basic, but it's been a few days and no one else has responded, so I figured we should start somewhere.

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This F-61 error is a hell of a problem i've tryed replaceing the fan wit a new one,, didn't work then i put the old fan back and it works but still nothing but this f-61 (I unpluged everything in...


Have you tried it with no speakers attached? Was it overheating? If not, why replace the fan?

F61 usually means the amp has detected a short or a severe microprocessor error.


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on; or it may turn on but produce no audio to the speakers.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Sep 22, 2011 | Panasonic SC-AK500 CD Shelf System

1 Answer

Annoying hum from speakers w/system off


The big electrolytic capacitor(s) in the power supply. The filter out the 50/60HZ hum in the mains, so you could be hearing the mains hum!

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hello my frien let me tell you that the system wont accept more speakers or diferent loads per ohm if the total load says 16 ohms by channel thats the total can handle so if you ad more speakers the system turns off before it burns or or have a severe damage........saludos

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hi , i just saw ur mail although I do not have the solution to this but I am keen to know how you are using these speakers as I too have identical beolab 6000 and beolab 9000. I was thinking of connecting them to a preamp. What do u suggest ? Pls guide

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Wire antena (that came with SS5 system) causes a hum


It is assumed that the hum is coming down the aerial wire it self....The hum should be eliminated
dissappear if you remove the wire from its connector at the rear of the receiver.

If this is the case then reconnect the aerial and try to find a radio station to listen to..

When you find a station you will find the hum dissappears as follows:

When there is no station detected the receiver tweaks up its sensitivity via the Automatic Gain Control, (AGC) and when this happens any thing that is detected on the aerial is reproduced at the speakers and in your case its just a hum.

I have heard this event lots of times and mostly its scrackles or scratchs or other weird sounds which come down the aerial while the AGC is flat out at maximum..

The radio station transmits a sound "carrier" and within this carrier there is the music content.

The receiver detects the "carrier" when you tune to the radio station, and then it sets its receive
level to the setting made by the volume control and then lovely music is presented at the speakers..

So in fact your receiver is working as it should be ,.,,, no worries mate....

Now if the hum is still there when the music is there then you have a fault, but as you havent mentiond this aspect your receiver is in my view quite "normal".

Cheers For Now
From YUBEUT..


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1 Answer

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Hooking up the AM antenna loop should not have fried anything, as I know lots of peeps who have done that. The FM RF amp. sounds like it may be at fault. The only way to tell if its bad is by hooking up an RF generator and I would be surprosed if you had one of those laying around. Disconnect the unit and take it to a repair shop.. If its an older model Time to get a new one. Good Luck

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1 Answer

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Probably not My friend. These self type audio units use an audio output IC and if it blows out you must replace it. Its a soldered in device and is not a consumer replaceable part ,unless you have some know how on desoldering and soldering. This repair should run somewhere around 85 to 125 bucks to repair. Good Luck

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