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Fixing a noisy fan

As fans in electronic equipment get dirty; the dust and dirt will slowly work its way into the mechanical components of the fan, grinding the smooth plastic surfaces like sand paper. This keeps the fan from moving smoothly and eventually produces a buzzing or whirring noise from the resulting friction. In time, the increased heat and friction will simply burn the motor out and it may stop working entirely.

Some choose to just ignore the problem or simply disconnect the fan to stop the noise; however, the fan usually serves an important purpose cooling the machine. Cases are carefully designed to circulate air and even one fan failing out of several can change the airflow in such a way that pockets of heat can become trapped above chips and under critical components. While many think that washing or cleaning the fan regularly may resolve this issue, often it does not. In fact, it can make it worse by removing oil and grease intended to lubricate the parts and keep them running smoothly. Removing the dust itself will also not replace the lost plastic as normally smooth surfaces will still be scored. Many times after cleaning fans become even noisier.

Because the plastic itself is physically damaged, the best issue long term with a noisy fan is to just replace the fan yourself when it becomes unbearably loud. That said, don't pay to have a fan repaired or cleaned by a repair service unless under warranty. Most computer shops when faced with a noisy fan issue will simply soak the fan in mineral oil or lubricate it with WD-40 and return it to the customer. This only resolves the issue for a short period of time and cheats the consumer given that the computer fan itself can be bought at a variety of part suppliers so cheaply.

Just treat the noise as good indicator that failure of the fan is imminent. Generally it will not cost over $15 and once installed it runs quietly for a much longer amount of time than any fix.

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What is the solution for overtemp of pioneer htz 787 dvd home theater?

There can be many causes of overheating, not eh least of which would be a malfunction of the device electronics. But first, check these things to ensure best operation:

1. DO NOT install in an enclosed AV cabinet. While these thing look nice and pretty, they do not allow proper air flow to these higher-powered devices and can cause them to run hot.

2. Verify that the rear cooling fan(s) are operational. If the heat cannot be removed from the case, it only stands to reason that the unit may overheat. Replace fans that are non-operational.

3. Clean, clean, clean. Dirt and dust are the enemy of electronics. Many home theater systems are low-to-the floor- cabinets that the LCD TV sits on, and this places the electronics near to the floor where the most dust and dirt are kicked up. This gets into the electronics and clings to the components via static charges. This insulates the components and causes heat buildup. Use a can of compressed air (available at most stores that sell electronics), and blow out the air passages. If the cabinet is extremely dirty, and you fell capable, you can unplug the unit, open the cover, and blow out the dirt that way. Use only electronics cleaner canned dust remover, as it is non-conductive and relatively static free. Using a home air compressor can cause moisture to get on the boards and can create large static charges that can damage components.

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Your problem could be as simple as dirty condenser coils or a burned out condenser fan. These components are on the bottom of the refrigerator and removing a couple of panels should give you access to them. Clean dust and dirt off the coils and check to see if the bottom fan is running when the refrigerator is running.

What is possibly happening is that excessive pressure builds up in the refrigerant lines due to the lack of air moving over the coils, caused either by a dust and dirt accumulation or a burned out fan. Or both. I know this may not sound logical, but dust and dirt is your refrigerators number ONE enemy. You'd be surprised how often this relatively simple (and FREE) fix will correct your problem.

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1 Answer

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Well no offense but electronics do not like heat, dust, or hard impacts. And on that note, they very much dislike their owners abusing and throwing them around. RESPECT THE ELECTRONICS YOU OWN, and in turn they will respect you and work correctly. You most likely damaged the internal components and the drive when you threw it on the floor. So, buy a new box, or deal with the fact that your tantrum just ruined 100's of dollars worth of equipment! sorry!!

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Hi there, Have you checked the unit for dust or dirt, sometimes things like that can cause components to stop working, things like cooling fans can be adversely affected by dust and dirt. It sounds like the cooling fan inside the amplifier unit - clear out as much dust or dirt as you can find and hopefully this should fix the problem, but if the problem persists then the short described in the manual (which I have researched) will most likely be related to the cooling fan and it's power supply - it may be safer to send it to Panasonic for repairs at this point - especially when it comes to electrical faults. Hope this helps.

Kind regards..

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The fan rotor is stuck due to accumulation of dust. Take out the fan and clean it. Put a few drops of alcohol or lacquer thinner on the rotor/bushing assembly while manually turning its blades to loosen the hardened dirt until the fan freely spins like the good one. If it does not work, replace the defective fan if spare is available.

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