In detail: do-it-yourself repair of a hair dryer, a babyliss brush, from a real master for the site my.housecope.com.
Those who decided to repair such a hairdryer themselves face a non-trivial task - disassembly, repair is the third thing, as they say ..
For disassembly, I used a bunch of different small screwdrivers and two scalpels. Next, I publish photos, having studied which any person can disassemble and assemble this device without breakdowns.
Pay attention to the latches, in them "the dog rummaged"
The hair dryer is assembled and working. In my case, the repair of the planetary gearbox was required (the brush did not rotate).
Photo in good resolution, good luck with the repair!
A hair dryer consists of a motor, a fan, heating elements, an electrical circuit that makes the elements work in concert. Depending on the number of modes, the manufacturer, the element base, appearance, and the composition of the switches are different. But nothing more complicated than a semiconductor thyristor will not be inside. Therefore, we will carry out home repair of hair dryers with our own hands.
The body is held in place by screws. The heads are often of a non-standard design. This is a plus sign, an asterisk, a pitchfork. Therefore, first of all, before fixing the hair dryer, let's take care of a tool that can cope with such a task. Fortunately, a set of bits costs 600 rubles today.
Sometimes the case flaps are additionally fastened together with special latches. This is a separate problem: experienced craftsmen often break plastic, desperate to cope with civilized methods. There are no subtleties, they come up with hidden screws hidden under stickers, plastic inserts, removable regulator caps. The fasteners are fictitious. There are no useful functions.
Video (click to play).
The hair dryer motor is powered by direct current 12, 24, 36 V. To rectify the mains voltage, a diode bridge is used, in cheap models - a single diode. The filtering of power harmonics is carried out by a capacitor connected in parallel to the motor windings or as part of a more complex filter. Inductors are rarely used in hair dryers due to their exorbitant mass. Therefore, knowledge of the principles of smoothing pulsations with RC-chains is enough to cope with the construction of a schematic diagram of a hair dryer being repaired. Sometimes a single coil (inductance) is used by the filter element.
The hair dryer switch simultaneously closes the circuit through which the spirals will be powered, starts the motor. Further schematic of the intervention is determined by the complexity:
only the rotation speed or only the temperature is regulated;
the ability to select heating and air flow rate separately.
In most models of hair dryers, in parallel, there is protection against turning on the heaters when the motor is inactive. Protects the spiral.
Optionally available thermostat in the form of a special resistance or other sensitive element. Let's describe the breakdowns encountered by the faithful helpers of the beautiful half of humanity.
If the device is devoid of signs of life, it is unstable, the inspection begins with the power circuit. The repair of Rowenta hair dryers is schematically described below.
Attention! The described types of work require skills in handling electrical appliances. The authors disclaim responsibility for damage to health, property, arising from attempts to follow the recommendations given for repairing hair dryers.
Inspection of the power cord begins with a socket. There is a part of the malfunction: there is no voltage - the hair dryer does not work. If there is voltage in the outlet, the inspection of the cord begins with the entry point into the case, walk towards the plug. Work is performed on a de-energized device. A visual search for fractures and irregular formations - burners, insulation damage, fractures is carried out.
Then the case of the hair dryer is disassembled. Inside you have a chance to see the options for electrical resistance:
A pair of detachable contacts.
Soldering.
The wiring is sealed in plastic caps.
The last element of the list characterizes a non-separable connection, therefore, the case for testing is too complicated. Skillful hands, or rather, smart heads, Ukrainian brothers in mind are advised to use an ordinary needle to repair a hair dryer. Those who immediately grasp the train of thought will skip the next paragraph, start testing directly.
Do-it-yourself hair dryer repair begins with a continuity of the wiring. A Chinese tester, a light bulb, an indicator will do. A needle is attached to one terminal, which is then inserted into the power core in the area of the cap through the insulation to copper. The second terminal probes the legs of the plug. The call goes through for both cores. It is not worth doing more than 1 puncture per core when repairing a hair dryer (some will try to look for a breakage as well), since the nature of the operation involves the ingress of moisture from wet hair.
Even a child can ring the wire, having visually distinguishable docking points in front of his eyes. If damage is found, it is recommended to buy a new cord fitted with a non-separable plug. The likelihood of moisture ingress imposes restrictions on the choice of insulation of conductive parts used to repair a hair dryer.
Cases are common: the first glance reveals the place of damage to the cord entrance into the case. Slabs, carbon deposits, black insulation indicate the location of the fault.
At the junction with the body of the hair dryer, there is a vulnerable point of the wiring. The hostess takes the delicate device by the cord, shakes it from side to side, winds the cable around the handle. A vein with a crack sparks, the insulation heats up, burns out, the copper melts. This is the mechanism of damage to copper conductors.
When updating, it is useful to short-circuit the switch, check: the hair dryer will change the behavior radically in response to an uncomplicated step. There are three-position switches, each position in a short-circuited state is checked separately. Remember, sketch out the original wire layout before you start fixing the hair dryer.
Checking the speed, temperature switches uses a similar circuit.
Examine the defective element identified during the restoration of the hair dryer. The carbon deposits are cleaned off with a file, sandpaper, eraser. The contacts are wiped with alcohol. Defective components are replaced with equivalents. A radical method is to short-circuit the power button while searching for suitable components.
Relatively often, the air duct is clogged with a hair dryer. It is necessary to remove the filter, if any, and clean it thoroughly. Remove dust from crevices with a soft brush.
Lack of blade rotation or low rpm is often observed when the hair is coiled around the motor shaft. The propeller must be carefully removed from the shaft, in every possible way avoiding unnecessary efforts and distortions. After that, foreign objects are removed.
A hair dryer usually has several heating elements. Visually, they should all look uniform. Make sure of this when fixing the hair dryer by opening the case. The detected breaks are eliminated by twisting the ends, soldering and tinning. You can also get some thin copper tubes and squeeze the ends of the broken spiral inward.
We observe defects in heating elements during repairs visually. A close inspection will tell you how to fix your hair dryer. Replacing spirals with similar purchased or homemade products made of nichrome wire is effective.
The electric motor of the hair dryer can be powered by both direct current and alternating current. If the diode bridge is burned out, the windings are damaged, normal functioning is impaired. A terrible crackle and sparks when turned on indicate a malfunction of the motor.
The motor windings are desoldered when repairing the hair dryer from the electrical circuit. Find a pair for each wire that rings. The conclusions are connected in threes, none should hang in the air. Replacement of the winding when repairing a hair dryer is carried out only in a workshop. However, folk craftsmen shake not worse than machine tools. Those who wish will try.
If the windings are in good working order, the brushes are examined, the copper surface under them is cleaned, and the tightness is estimated.
The axis should rotate freely.When repairing a hair dryer, it will not hurt to lubricate the rubbing surfaces, manually break in problem areas.
The getinax backing sometimes cracks, tearing the track. Tin the damaged area, lightly cover with solder.
Broken capacitors swell slightly. The top face of the cylinder contains shallow slots, when the product breaks, the sidewall inflates, bending outward. Replace such a capacitor first if you find a characteristic defect.
Burnt-out resistors darken. Some remain operational, it is advisable to replace such a radio element.
Some hair dryers are self-regulating. The effect is achieved by using a resistive divider, one arm of which is an element that responds to temperature. Further actions are determined by the parameter control implementation scheme. We recommend:
eliminate the sensor altogether by breaking the circuit, try the device's reaction;
short-circuit the wires after that, turn on, see what happens.
There is a great chance of failure if the device is trained to respond only to a fixed resistance value. It remains to look for a schematic diagram on the Internet or draw it yourself.
Repairing professional hair dryers is more difficult. Structural elements are often complemented by smooth controls and additional options such as the Care button. The spirals are made of special alloys that create negative ions when heated, which have a beneficial effect on the hair. The technique remains the same:
cord;
switches and buttons;
dust removal;
spirals;
motor;
visual inspection of capacitors, resistors.
Before repairing it, it is advisable to get a schematic diagram.
Industrial models are not much different from household ones. But drying your hair is not recommended. Such products are distinguished by their increased resistance to dust, shock, vibration, humidity, and other climatic factors. Home restoration of industrial hair dryers will not end well.
Electric radio products used in household models are not suitable for use in harsh environments. Requirements apply to wires, power cord, motor and coils.
In everyday life, a large number of electrical appliances are used to make life easier for the layman. But any technique tends to fail over time. Repairing a hair dryer can be easily done with your own hands at home, without asking for help from a service center.
A hair dryer is a device that is used to dry and style hair. It consists of the following structural elements:
Engine;
TEN - heating element;
Fan;
Thermal protection;
Power cable;
Regulators (fan speed, temperature, etc.).
The principle of operation of the household hair dryer is based on a low-voltage DC collector motor. In order for the device to turn on, a special lowering coil is used in its design, which helps to drop the voltage to the required level. It is installed inside the heating element. With the help of a diode bridge, the voltage is rectified. The engine has a steel shaft on which a fan is mounted (in most cases, it is made of plastic, although there are now professional models with metal blades). The fan can have two, three or even four blades.
Photo - hair dryer design
The heating element of an electric hair dryer is presented in the form of a spiral with a nichrome wire. It is wound on a non-combustible base, which increases the safety when using the device. When plugged in, the coil begins to heat up, and the fan installed behind it blows warm air out of the hair dryer case. To protect against overheating, a temperature controller (adjustable during operation) and a thermostat are used. In addition, any hair dryer has a "cold wind" or "cool" button - when you press it, the spiral stops heating up, only the engine and the fan remain to work, respectively, cold air blows from the nozzle.
Photo - filter
It should be noted that not all equipment has a thermostat.It is designed to control the heating of a block with nichrome during long-term operation of the device. For example, it can be a stationary professional hairdryer (used in hairdressing salons). When the coil reaches its maximum allowable temperature, the thermostat cuts off the power. After cooling, the contacts are turned back on.
Photo - nichrome spiral
Typical malfunctions of the Bosch LCD hair dryer (Bosch), Valera, Skil, Vitek, Scarlett (Scarlet) and others:
Smells burnt. The smell can come from the coil, which has gotten the hair as a result of careless handling, or from burning of the internal parts of the circuit;
Hair dryer does not turn on. The reason may be a breakdown of the engine, a broken power cord, a lack of voltage in the network;
Decreased work efficiency. The power of the device depends on the cleanliness of the filter installed on the back of the case. If it gets clogged, then the device will start to work with less efficiency;
The fan rotates very slowly. Most likely, something just bothers him;
Hair dryer Braun (Brown), Philips (Philips) or Rowenta (Roventa) does not heat up. There are several reasons why this happens: the cold air button is blocked, the spiral is broken, the circuit is damaged, the thermostat does not work.
Photo - model for drying hair
Before starting repairs, you need to know how to disassemble a Parlux, Saturn, Moser or Jaguar hairdryer yourself. There is nothing complicated in this, you just need an instruction and a screwdriver:
There are two bolts on the back of the body. They need to be unscrewed and carefully removed. In some cases, there are more of them, make sure that all fasteners are removed;
In parallel, you can also remove the cover from the top panel - there is a fan under it. Most often it is simply pressed against the body, so it comes out without problems if you pry it with a screwdriver;
Under the top panel of the case there is a mode switch and a cold air button. Several wires are installed on the panel. Which are connected to the pins of the circuit. For further disassembly, they will need to be removed;
Now you can remove the coil from the hair dryer head. It is necessary to act carefully, otherwise it may break, remove only after making sure that all fasteners have been removed;
Under the spiral, respectively, there is a motor. Most often there is no need to get it out, since almost all malfunctions will be noticeable immediately at the place where the motor is connected to the contacts of the heating element. An exception is the need to replace a part, then a major repair is made.
Consider how to make an independent repair of a hairdryer Babyliss, Rowenta Brush Activ, Bosh, Remington and others at home. First of all, you need to clean the fan and motor shaft from hair. A lot of them are collected there even after several months of intensive use. To do this, you need to remove the back top panel and cut the hair, then simply remove it with tweezers or fingers. In no case should you wipe the parts with a damp cloth - this will damage the contacts. This is done anyway, regardless of the problem.
Photo - fan
If it smells burnt, then you need to repair the spiral and filter. They can be cleaned with a dry soft brush. Just wipe the heater teeth and clean the filter. Be careful not to break the contacts during the cleaning process.
Photo - Cleaning
If the hair dryer does not turn on, then you need to check the power cable right away. Most often, it breaks at the base, because during operation, the hair dryer rotates many times in different directions along its axis. If everything is fine with him, then look at the contacts on the spiral. They can be 2, 3 or 4. When the device falls or hits, they sometimes get unsoldered, which causes the motor power to be cut off.
When the breakdown is related to the fan, it is as easy as shelling pears to repair the device. The first step is to check if the blades are intact. Of course, the efficiency of their work does not change too much from their state, but if cracks or notches are noticed, then it is better to immediately change the propeller. Then inspect the shaft.Sometimes small parts or other debris fall into the nozzle of the hair dryer, blocking the shaft, and it starts to spin slowly.
Now let's discuss the reasons why the spiral of dry warm air does not heat up with a professional Coifin, Steinel or Lukey hairdryer. As we said, there can be several reasons. For example, the cold air button is stuck. The principle of its operation is as follows: when you press the button, the contacts inside the case open, as a result of which the heating coil stops working. If it is open all the time, then the spiral simply cannot start heating. If the problem is not in the button itself, but in the contact, then you need to solder it yourself.
The cause of the breakdown may lie in the broken coil, its repair is a little more difficult to carry out than cleaning. In some models, it is made of low-quality material that breaks easily from impact. If some notches are missing on the base or mother-in-law is visible, it is replaced.
