Question about KLH PSW8100-8 Subwoofer

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Loud humming sound

The psu is humming for some reson and there is very little sound when it is playing

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  • bmxleester Jul 13, 2009

    look for rusted risters that will solve that problem

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Check and make sure the ristors are not rusted

Posted on Jul 04, 2009

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Posted on Jan 02, 2017

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This might or might not be your problem, or the fix, but if you have a set of wrenches and sockets, it won't cost you anything.

I had a bike that would "drone" only when the engine was running at 2000 RPM to 2300 RPM.

It turned out it was a loose exhaust pipe mounting.
Not so loose that I heard a rattle, but rather "Mechanical Resonance" (here's a "cut and paste" definition - "Mechanical resonance is the tendency of a mechanical system to absorb more energy when the frequency of its oscillations matches the system's natural frequency of vibration than it does at other frequencies. It may cause violent swaying motions and even catastrophic failure in improperly constructed structures including bridges, buildings, trains, and aircraft. When designing objects, engineers must ensure the mechanical resonance frequencies of the component parts do not match driving vibrational frequencies of motors or other oscillating parts, a phenomenon known as resonance disaster.")

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Loud hum


hi,
Sorry, a load humm is indicatrive of blown output transistors. If it is still playing, but have a load humm, there is a PSU problem. Haver it fixed or the probem will get MUCH bigger!

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Humming sound when Sony DVD player is turned on. The player is attached to a TV. The sound continues when a DVD movie is played.. The intensity of the humming changes with changes in the Video.


Is the humming just from the power on or is it when the DVD is spinning some media will spin with a loud humming noise something to do with the balance similar to an unbalanced car wheel, just a lot quiter. Burn the DVD using ImageBurn create an ISO and reburn.

If it hums without the DVD spinning it is probably the transformer on the PSU on it way out this can happen at any time it is caused by the voltage step down coil becoming damaged in some way and the lower voltage provided causes the noise.

If this is the case I suggest a new PSU or at least a new Transformer.

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Generic problem for all Kenmore Microwave


Loud hum is usually due to faulty hv diod, resonance capacitor, or the magnatrone feed thru capacitor , chk it with a ohm meter , one by one n replace it .. zaheer Islamabad

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It could be the fuel pump pressurizing the system. Does the sound stop after a few seconds? If it is the fuel pump then it is a normal sound. Fuel pumps will resonate in the tank when you are low on gas, making them sound louder. If it is more than a hum then I would get it checked out.

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Loud humming after turning on.


I have sort of the same problem...there was a loud snap(kind of electical spark like) then the unit started humming loudly which changes sound as you move the unit around. The picture remains clear and the fan is quiet in shut down mode...still the wheel you think?

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Ps3 makes loud humming sound while playing blu-ray movies


Try messing with some the of the BD settings.

It's under SETTINGS, VIDEO SETTINGS.

Let me know if this helps.

I can't say exactly which one you need to change and don't worry about messing anything up, you can always just change them back.

Let me know which one fixes your problem.

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18 gauge is a little light... should use 14. Are you sure it is a hum, or is it possibly the fan resonating due to imbalance of the blades. Watch to see if the fan is oscillating when it runs. Also, does changing the speed affect the frequency of the hum. If this is the case, you have to balance the blades using metal shims.

Sep 20, 2008 | Hampton Bay 36 In. San Marino in Brushed...

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