Repair of desktop fans
If there is no air conditioner, then in the heat the only means of ensuring some coolness will be an electric fan. Desktop fans are relatively simple and reliable electrical appliances.But moving details are subject to natural wear and, like many portable devices, fans are often damaged as a result of careless circulation.
There are similar fans with a floor stand.
How does it work
The fan is usually mounted on the shaft that rotates the electric motor. From the opposite end of the shaft there is a worm gear connected by a gearbox with a crank, which makes the fan slowly turn from side to side so that the air flow covers a large area. There is a special switch that can disconnect the gearbox when the turning mode is not needed. All fans, except the simplest models, have two rotation speeds. The diameter of the average desktop fan can be in the range of 175-300 mm, floor models are slightly larger.
Some desktop fans are so cheap that it is unlikely to make it sense to give them for repair, however, since fans are usually served very easily, it is worth spending a little time to return the device to working condition.
- Fan blad
- Fencing lattice screw
- Electric motor
- Reducer switch
- Rotation speed switch
- Contact block
- Plane bar
The engine is noisy, but the blades do not move
Sometimes when the fan is turned on, the sound of a working motor is heard, but the blades remain in place. There may be several reasons.
- The lubricant on the bearings dried up. You need to disassemble the case, remove the remains of the old material and grease the bearings again. It is better to choose a composition on a silicone basis.
- The bearings have shifted. Probably the bushings in which they are in, eventually became unusable. Only the replacement of the bushings will help.
- Malfunction in the engine. The part will have to be carried for repair so that the master checks the resistance on the windings.
Why the fan does not work
In total, 5 main reasons for the failure of floor fans can be distinguished:
The main problem of cheap models, which for some reason few people pay attention to-incorrect casting blades. Because of this, an imbalance occurs, bearings are broken, gaps increase.
You can’t influence this in any way, as you already bought a fan with such an initial defect. Sometimes it seems to work, the impeller rotates normally, but does not blow.
That is, there is no cooling air flow from it. Why is it happening?
Due to the wrong corner of the attack of the blades. Its petals are deformed and drive an air flow in a circle, and do not throw it out.
This effect can appear over time, after the fan stood for a long time under the straight rays of the sun and its impeller heated, began to gradually change its shape.
It is treated only by replacing the impeller with a new.
The most common problem is the dried lubrication or its lack. The fan begins to wedge, lose speed and, as a result, the load on the engine increases. Vetrodui no longer works in full force.
The engine wound up with a thin wire of 0.2mm begins to heat up and the windings gradually burn out.
How a similar defect is detected? In this case, the fan ceases to rotate. He is buzzing, but the impeller does not spin.
It also happens that it starts only at 3 speed, and does not react to the first two at all. He just does not have enough power to turn the shaft.
In order to start it, you have to sprout like on old aircraft in an impudent.
By the way, the same symptom may be with damage to the start.up capacitor. How to find out without devices what reason is to blame for the breakdown?
To do this, at least get to the engine shaft, removing the protective casing and blades. If the shaft by hand will rotate with great difficulty, then blame dirt and dried grease.
And if he spins easily and he has inertia, then most likely a conder was covered. Symptom. turned on the fan in the outlet, but it does not spin. At the same time, scroll into a impudent motor and it starts.
If you hold the fan blades when working with your hand, it can stop again. The capacitor is checked by a multimeter if it has an appropriate capacity measurement scale.
To replace, select a new conder according to the same parameters as indicated on the body of the old.
By the way, a dried.up capacitor has not yet been fully affected, also affects the moment. If you notice that they fell from you and the fan began to spin slower, this is a bell to check it.
The problem of tight rotation is solved by a new lubricant of bearings. Here are used, the so.called sliding bearings. Someone calls them bushings.
Apply balls in such designs is expensive, and they thunder over time, they be healthy. For repair it is not at all necessary to disassemble the entire engine entirely. It is enough to unscrew a few cogs and spray to the right places with the universal aerosol WD40.
How to get to the bushings without removing the engine? To get started, unscrew the central screw on the back wall of the protective casing.
Another self-tapping screw is hidden in the adjustment button for turning or stopping at the fan head.
After that, the back cover is easily removed from its place. What is under it? Here you can see the gearbox of the rotary mechanism that gives rotation to the whole head.
A special thrust is suitable for him from below.
The starting condenser of the engine is fixed on top.
By the way, keep in mind that in different models it may not be there. In this case, look for it near the speed buttons.
To access the engine bearing, you will need to remove the gearbox. It is attached on three screws, and properly propped up with a traction.
Twist the screws and disconnect the thrust. After that, the gearbox is removed from the shaft and you get access to the rear hub.
You don’t need to unwind anything else and disassemble. The rest will be made for you.
The unit does not turn on
In this situation, there may be 2 options: a light bulb that means the readiness of the unit to work, can be caught or not. Depending on this, the algorithm for diagnosis of the breakdown will differ.
The bulb does not burn
If, after the device is turned on, the bulb located on its case does not light up in the outlet, and it does not start, then, first of all, it is necessary to check if there is a voltage in the outlet. It is done simply: take any electrical appliance and include in this outlet. If the device has earned, then you need to look for a malfunction in an electric fork and cord.
To check the fork, spin it and check the reliability of the connection of the wires to the terminals. To check the cable, it is necessary to disconnect it from the contact pad of the device and “call” the tester. If a cliff is detected in the cable veins, it should be replaced.
The bulb is on fire
The reason for this behavior of the unit, when the indicator bulb burns, but the fan does not work and no sounds can be heard, it can be caused by the blocking of the block with the buttons. To check the buttons, you need to disassemble the button unit located on the floor fan stance or stand near the desktop. But, before disassemble the device, make sure that it is turned off out of the outlet.
The work of buttons is very simple: there is a “vkl” and “off” position. Using the tester, check the “output” and “input” on each key.
If a faulty button is detected, it will not work to repair it. Therefore, the switch should be replaced or the connection is directly. This approach to solving the problem will help start the unit into work if you are far from the store, for example, in the country.
Faulty speed switches can also cause why the fan does not turn on. To check the regulator, you will need to put it in the maximum position and check the “entrance” and “output” using the same tester.
Search for a hardware problem
First, turn off the PC and open the side cover of the system unit. Carefully inspect the cooler itself and the CPU FAN connector. it is to it that you need to connect the fan (often many beginner collectors or connect the fan to the other. the connector, or in a hurry when assembling PC forget it to connect it at all!).
Secondly, pay attention to whether nothing prevents the fan’s blades from rotating (I came across several times with the fact that the power wires hit between the blades and did not allow the fans to work).
Also try to turn off the power fan and inspect the wire itself. Some little.known Chinese brands will compare their coolers with such “tony” wiring, which are torn from any careless movement.
Thirdly, if your fan has additional. connector (for example, for connecting to the Molex BP connector). try to turn it off from CPU FAN and connect directly to the BP.
Perhaps the motherboard will give an error “CPU FAN FAN ERROR” when you turn on the PC (but it can be skipped or opened. In BIOS, cooler control). and such “feint” as a temporary solution. It may well come!
Fourthly, if, after all of the above, the fan did not give “signs of life”, I would recommend it to check it on another PC.
If there is no second PC, you can use the collective farm method (sometimes I use it. ). Remove the fan from the PC housing and take a couple of copper wiring (the ends must be cleaned).
Next, you should connect two copper wiring to the fan connector, usually this is black and red wire (designation 1 on the connector, cm. screenshot below).
And copper wiring. to several (3-4) most ordinary batteries that can simply be put on the table to each other, plus to the minus! (“jigsaw”/”finger”, usually there are enough at home)
If the fan is “alive”. it will begin to rotate quietly (of course, much quieter than in the system unit). An example below.
If even after that the fan did not “come to life”. most likely it has already worked out his term, and it is time to replace it. You can, of course, try to disassemble, clean, grease, etc.D. But with inexpensive models in most cases, all this does not justify the time or money spent.
Repair the cooler of the laptop with our own hands
The cooling system is one of the most important, but at the same time vulnerable parts. She should work non.stop, maintaining the optimum temperature of all components. However, with prolonged operation of the laptop, noise may appear. The reason for this is the elementary pollution or wear of the mechanism.
If the laptop fan just stopped working or works with jerks, then in this case urgent repairs are required. Why the cooler does not work on the laptop and what to do, we will talk in this article.
There are two ways with which you can check if the fan has broken. The first. using special programs, is intended for beginners who have no experience working with special equipment. The second. technical, experience is required to work with the tester.
At first glance, it may seem that the disassembly of the laptop and the extraction of its components is a very complex and laborious process. In fact, everything is extremely simple. Of course, there are exceptions to some models, but in these situations there is nothing to worry about. If necessary, you can find detailed instructions on your laptop model on the network.
Checking using a tester:
- We unscrew the bolts, remove the latches and carefully remove the back cover of the laptop.
- Unscrew the bolts with which the cooler is screwed, and fold them separately.
- We disconnect it with particular caution without pulling or tearing it.
- Turn on the laptop and check whether the voltage is supplied through the supply fan wires.
If there are no interruptions with voltage supply, and the fan does not turn on, then the problem is in it, and you can start working on its “resuscitation”.
Failed to eliminate the problem? Seek for help to a specialist!
FIXED. The system has detected that a cooling fan is not operating correctly || System Fan (90B)
If the cooler does not start, the first thing is to check whether the rotor rotates with a mechanical effect. Gently peremate it with your finger or any tool.
Not spinning? It is safe to say that the cooler is polluted, and you need to clean and grease it. How to do this, read here.
A common reason why the fan does not work is the bias of the blade, as a result of which it begins to touch the top cover. This can be determined by small scratches that remain after contact during work.
Fix this problem and fix the cooler is quite simple. When installing the upper cover, drown it in a fixing frame so that the side walls do not hurt the blade during operation. Also, be sure to check the center, actively blowing the air into the side hole. The blade should spin silently and freely.
If you did everything right, then after turning on the laptop, the extra noise will disappear and he will stop basking, which will be especially noticeable in games.
Failed to eliminate the problem? Seek for help to a specialist!
When a replacement is required
If there are no problems with the power and rotation of the rotor, but the fan still does not spin, then the reason for its malfunction is most likely in the anchor winding. It is recommended to simply replace the cooler with a new.
The only problem that may arise is the difficulty in finding and acquiring a similar device, especially its dimensions. And do not buy an old detail, because it often works poorly. Better consult with a specialist. Today you can easily find this component for laptops of any company (Samsung, HP Pavilion, Asus, Acer, Lenovo or DNS).
If it is not possible to independently eliminate the problems that have arisen, then most likely the problem lies at a more technical level. This can be: a breakdown of the motherboard, power supply, hard drive, video card, RAM, etc.D.
It is important to diagnose and eliminate the breakdown in time to prevent failure of other components.
How to disassemble the device? Step-by-step instruction
Before proceeding with the performance of the detection of breakdown and its elimination, it is necessary to disassemble the household device. Take this stage very seriously. The fact is that an incorrect independent approach can aggravate the situation and then the device will be completely faulty.
In order to prevent such a development of events, we strongly recommend that you follow the above plan, and then the procedure will become easy and understandable.
Lasko fan not spinning (capacitor replacement)
- First, prepare the necessary tools. These are pliers, screwdrivers of different sizes, unnecessary dense fabric. You will need a container with water. But place the fan itself directly next to you.
- Now, using force, try to remove the protective net. If necessary, use additional tools. Set aside the grid. In front of you you will see three holes of a small diameter. These are latches.
- Pay your attention to the plastic nut that is available in front of you. You need to unscrew it with a screwdriver. At the same time, you must be counterclockwise movements.
- Unscrewing the nut, do not use strength, because a fragile plastic may simply not withstand.
- Look at the engine axis. Be sure to remove the blades from her.
- Disconnect the grate from the body.
- Now unscrew absolutely all the screws that you see in front of you.
- Remove the casing that was attached to the screws.
- After removing the casing on the fan, only the gearbox and the engine itself remains.
Now that all the necessary phased actions are completed, you can congratulate you, and also, we suggest you go to the next important point.
Closing windings or wiring
If the damage is more complex and simple lubrication does not help, you will have to disassemble the fan in more detail.
First you do all the fraud on disassembly as indicated above. After removing the propeller, unscrew the plastic front counter.gaming, which is located immediately behind him, and throw off the entire protective frame.
In your hands you have the engine itself and the leg in which the power wires pass and the button mechanism is located.
Distribution of this leg, having unscrewed 6 screws.
First of all, check the rations of the wires. It is possible one of them, or even somewhat fell off or burned out.
If everything is intact, how to understand which wire goes where and what is responsible for? Start checking with two wires from a fork for a power plug.
One of them, let it be black (as in the photo below), through the lighting light goes directly to the fan engine.
The second wire enters the lower terminal of the outline switch (button 0).
Further, by pressing the corresponding buttons-1st speed, 2nd, 3rd, certain contacts of the switch are closed, and thereby the engine speed changes.
Each wire from these buttons goes to its conclusion on the winding, with a larger or smaller number of turns. Giving tension to them, you make the propeller spin faster or slower.
Varieties of thermostats
Below we will briefly figure out the characteristics of each of them.
Thermoregulator with electronic filling includes three components:
- temperature sensor;
- a microprocessor responsible for the processing and transmission of information;
- thermorelene, thanks to which control is carried out.
Electronic thermostats are used not only in oil heater, but also to organize the management of larger heating systems (for example, a “smart home”).
Electromechanical devices based on relay are much simpler than electronic devices. There are several types of electromechanical regulators:
- Devices of the first group include a group of contacts and a double metal plate. When the equipment is heated, the plate isnd and, thus, opens the contact group. The consequence of the opening is the stopping of the supply of electricity to the heating plate. When the heater cools is cooled, the plate returns to the starting point, and the electron begins to work in the same mode, since the contacts are closed again. The cyclical work allows you to maintain the temperature level at approximately the same level.
- Devices equipped with relay work on the principle of expanding its elements as a result of heating. The relay is a cylindrical pipe, which contains a substance responsive to heating. The pipe is in a container of water. When the heater temperature rises, the substance in the pipe expands. Когда температура достигает определенного значения, расширенное содержимое воздействует на электрическую цепь при помощи привода, в результате чего происходит замыкание или размыкание контактов. In this way, it is possible to avoid overheating of equipment.
The most simply arranged mechanical type regulators. Such thermostats are ordinary locking reinforcement. The design of the device includes a cylinder with a rod, which is filled with a thermally sensitive substance. As a result of the expansion of the substance when heated, the rod partially or completely overlaps the flow of the coolant in the system.