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Owned NAD power amp for 15 years.

Just made loud cracking noise and stopped. I know little about this equipment but suspect accumulation of dust could be possible cause. Is age against it re fixing?

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Dont throw it away...i like to fix em. What model is it.

Posted on Dec 17, 2007

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Posted on Jan 02, 2017

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I would try to remove the back cover (after unplugging it) and see if there is an accumulation of dust on the fan motor. I would also check other places, if it is like mine the motor also turns a belt and they tend to get difficult for the motor to turn when full of lint.

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Ryobi p235 impact driver front bit holder has no tension it just slides back and forth you can see thee spring but there is no tension


I suspect the little ball bearings are out, possibly fell through the holes. Age and use and abrasive dust will cause this. You will need parts to replace the bit holder completely.

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Why does my Califone 1400 plate sound loud?


The rubber idler wheel that turns the platter may be worn out and may be hardened with age. If the rubber is not pliable the wheel turning against the metal platter will cause a noise. It may require a new rubber motor idler wheel.

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My hp scanjet G2410 makes a cracking noise when scanning


A jammed or broken tooth on a gear will cause cracking sound. And will continue until you shut off power. The reason the sound continues is because it's still in the process of scanning and hasn't reached the white tape which the sensor senses to return to the finished position. An HP scanjet just as its printers don't have a sensor to stop the carriage from moving until the job is completed. Further use will ultimately cause a loud pop and cause further damage.

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I bought my VAIO VPCF1 about two months ago, and I can't stop worrying about it. Where can I find the best ways to take care of it really well? Also, the fan is VERY VERY HOT and a little loud, is...


make sure it is well ventilated..enough space between the fan and any surface you put it on by placing an object just like how cooler ball works..
it is a little loud because of extra effort to cooldown your processor, usually happens if theres cpu extensive application like gaming, editing,watching hd movies, etc..or sometimes due to accumulated dust in the fan. just use air blower to remove dust that makes the fan inefficient

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My Marantz 4270 receiver makes a loud crack noise over the speckers and cuts out for about 5 seconds and then starts up again. This happens about every 30 min. Any one have the same problem?


You need to resolve it or stop using it as those loud noises are dangerous to your speakers.

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

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 'naked'. 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.

Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.

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1 Answer

My Alpine Air 880 makes a sizzling noise. I turn the dial down and it gets better. Whats the problem?


The sizzling is the high voltage "bleeding" to ground inside of the collector module, or the high voltage electronic circuit.

First, unplug the unit and remove the module. Thoroughly clean all electrical contact points where the module makes connection. If it possible to operate the unit without the module in place, then replace all covers, plug the unit in, and attempt operation. If you continue to hear sizzling, then unplug the unit, remove covers, and continue to clean, digging deeper into the unit to find traces of accumulated dust/dirt. Also be on the lookout for burned areas in the plastic, around insulators, etc. High voltage is a mighty beast, and will easily track to ground, causing a sizzling noise.
If you don't find anything there, then take the modele and look for any tracking points on the insulators. Look very closely at the ionizer wires for accumulated lint, which creates little points where high voltage can bleed to ground from.
You may get popping of high voltage as well. When this happens, note the places where it occurs, and those places become suspect of causing the sizzling sounds.
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When washer agiates it makes a loud squeaking noise, what can it be?


Hi,
This is difficult to work out as there are so many different symptoms. Here are my thoughts -

Dust from carbon rushes is black. Grey dust usually comes from a loose concrete weight. Loose tub weights are rare on this model but they cause a loud knocking noise which is often worse when the washing machine is revving up to spin and dying down from a spin (suspension problems are also often worse at this safe too). It's not normally a metallic sound though.

If the noise is coming from the motor banging against the sides of the machine then it will make the machine move when it happens. The whole machine may jump or move to one side. The motor often thumps the side of the washing machine on Hotpoint washers where the motor is fitted at the top of the tub and over to the right hand side. This is a daft place to fit a motor and only .I think they've eventually stopped now though.

It is normal to be able to push the drum to the side so that the motor hits the casing. If the suspension has gone, the tub should be twisted and leaning to one side more than the other or it just could be very loose. It's difficult to check suspension if you don't know how it should feel.

If the noise is coming from the inner drum hitting the heating element or throwing an object like a £1 coin (trapped between the inner drum and the outer tub) around, then the washing machine will be stable but the noise would still be a horrible metallic knocking. This is one cause I suspect.

Thank you for contacting Fixya.com

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1 Answer

Loud noises


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