In detail: do-it-yourself rowenta brush activ 1000 repair from a real master for the site my.housecope.com.
In everyday life, a large number of electrical appliances are used, designed 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 seeking 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 part;
Fan;
Thermal protection;
Power cable;
Regulators (fan speed, temperature, etc.).
The principle of operation of a household hair dryer is based on a low-voltage DC collector motor. In order for the device to turn on, its design uses a special step-down coil, which contributes to the voltage drop to the required level. It is installed inside the heating element. With the help of a diode bridge, the voltage is rectified. There is a steel shaft on the engine, on which the fan is mounted (in most cases, it is made of plastic, although now there are professional models with metal blades). The fan can consist of two, three or even four blades.
Photo - hair dryer design
The heating element of the electric hair dryer is presented in the form of a spiral with nichrome wire. It is wound on a non-flammable base, which increases safety when using the device. When plugged into the network, the spiral begins to heat up, and the fan installed behind it blows warm air out of the hair dryer body. To protect against overheating, a temperature controller (adjusted during operation) and a thermostat are used. In addition, any hair dryer has a “cold wind” or “cool” button - when it is pressed, the spiral stops heating, only the engine and fan remain running, respectively, cold air blows from the spout.
Video (click to play).
Photo - filter
It should be noted that not all appliances have a thermostat. It is designed to control the heating of the block with nichrome during prolonged operation of the device. For example, it can be a stationary professional hair dryer (used in hairdressing salons). When the spiral heats up to the maximum allowable temperature, the thermostat turns off the power. After cooling, the contacts are switched 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 may come from the spiral, which has fallen into the hair as a result of careless handling, or when the internal parts of the circuit are burned;
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 is clogged, then the device will start to work with less efficiency;
The fan rotates very slowly. Most likely, something just interferes with him;
Hairdryer 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 coil 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 hair dryer yourself. This is not difficult, you just need instructions and a screwdriver:
There are two screws on the back of the case. 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 - under it is a fan.It is most often 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. There are several wires on the panel. Which are connected to the contacts of the circuit. For further disassembly, they will need to be removed;
Now you can remove the spiral from the hair dryer head. You need to act carefully, otherwise it may break, take it out only after you make sure that you have removed all the fasteners;
Under the spiral, respectively, is the motor. Most often there is no need to get it, because almost all malfunctions will be noticeable immediately at the place where the engine is connected to the contacts of the heating element. An exception is the need to replace a part, then the repair is overhauled.
Consider how the Babyliss, Rowenta Brush Activ, Bosh, Remington and others hair dryers are self-repaired at home. First of all, you need to clean the fan and motor shaft from hair. There are a lot of them 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 your fingers. In no case should you wipe the parts with a damp cloth - this will damage the contacts. This is done in any case, 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 teeth of the heating element and clean the filter. Make sure that the contacts do not break during the cleaning process.
Photo - Cleaning
If the hair dryer does not turn on, then immediately you need to check the power cable. 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. There can be 2, 3 or 4 of them. When the device is dropped or hit, they are sometimes soldered, causing the power to the motor to be cut off.
When the breakdown is related to the fan, then repairing the device is as easy as shelling pears. The first step is to check if the blades are intact. Of course, the efficiency of their work will not change too much, but if cracks or notches are noticed, then it is better to immediately change the propeller. Then look at the shaft. Sometimes small parts or other debris fall into the nozzle of the hair dryer, which block the shaft, and it starts to spin slowly.
Now let's discuss the reasons why a Coifin, Steinel or Lukey professional hair dryer does not heat up a spiral of dry warm air. 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 to heat up. 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 a broken spiral, 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 on impact. If some notches are missing on the base or cracks are visible, it is replaced.
Video: how to repair a spiral in a hair dryer
The hair dryer consists of a motor, a fan, heating elements, an electrical circuit that makes the elements work in harmony. Depending on the number of modes, the manufacturer, the element base, appearance, composition of the switches are different. But nothing more complicated than a semiconductor thyristor will not be inside. Therefore, we will carry out home repairs of hair dryers with our own hands.
The body is held on with screws. The heads are often non-standard. This is a plus sign, an asterisk, a pitchfork. Therefore, first of all, before fixing the hair dryer, we will take care of a tool that can cope with such a task. Fortunately, a set of bits today costs 600 rubles.
Sometimes the body doors are additionally fastened together with special latches.This is a separate problem: experienced craftsmen often break plastic, having despaired of coping with civilized methods. There are no tricks, they come up with hidden screws hidden under stickers, plastic inserts, removable regulator caps. The fixture is fictitious. Useful features are missing.
The hair dryer motor is powered by direct current 12, 24, 36 V. A diode bridge is used to rectify the mains voltage, in cheap models a single diode is used. Power harmonic filtering is carried out by a capacitor connected in parallel with the motor windings or as part of a more complex filter. Due to the exorbitant mass, inductances are rarely used in hair dryers. Therefore, knowledge of the principles of smoothing ripples by RC chains is enough to cope with the construction of a schematic diagram of a repaired hair dryer. Sometimes a single helix (inductance) is used as a filter element.
The dryer switch simultaneously closes the circuit through which the spirals will be fed, starts the motor. Further intervention scheme is determined by the complexity:
only the speed of rotation or only the temperature are regulated;
the ability to separately select the heating and the intensity of the air flow.
In most models of hair dryers, there is parallel protection against turning on heaters when the motor is inactive. Save the spiral.
Optionally available thermostat in the form of a special resistance or other sensitive element. Let us describe the failures 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 decline liability for damage to health, property, arising from attempts to follow the recommendations for repairing hair dryers.
Inspection of the power wire begins with a socket. Some of the faults lie there: no voltage - the hair dryer does not work. If there is voltage in the outlet, the inspection of the cord begins at the point of entry into the housing, go towards the plug. Work is performed on a de-energized device. A visual search is being made for kinks and irregular formations - burns, insulation damage, kinks.
Then the body of the hair dryer is disassembled. Inside you have a chance to see options for electrical resistance:
Pair of connectors.
Soldering.
The wiring is sealed in plastic caps.
The last element of the list characterizes a non-separable connection, therefore, it is an archaic case for testing. 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 caught the train of thought will skip the next paragraph, directly start testing.
Do-it-yourself hair dryer repair begins with a wire call. A Chinese tester, a light bulb, an indicator will do. A needle is attached to one terminal, which is then stuck into the power core in the area of the cap through the insulation to copper. The second terminal feels the legs of the fork. 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 also try to look for a breakage point), since the nature of the operation involves moisture from wet hair.
Even a child will be able to 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 equipped with a non-separable plug. The possibility of moisture ingress imposes restrictions on the choice of insulation of conductive parts used for the repair of a hair dryer.
Cases are common: a first glance reveals the place of damage to the cord entry into the case.Sagging, soot, black insulation indicate the location of the malfunction.
At the junction with the body of the hair dryer, there is a vulnerable wiring point. The hostess takes the delicate device by the cord, winds it from side to side, winds the cable onto the handle. A core with a crack sparks, the insulation heats up, burns out, copper melts. This is the mechanism of damage to copper wires.
When updating, it is useful to short-circuit the switch, check: the hair dryer will change its behavior in response to a simple step in a fundamental way. There are three-position switches, each position in the short-circuited state is checked separately. Remember, draw the original wire layout before you start fixing the hair dryer.
Checking speed, temperature switches uses a similar circuit.
Inspect the defective element identified during the restoration of the hair dryer. Nagar is cleaned off with a needle file, sandpaper, and an eraser. Contacts are wiped with alcohol. Faulty 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. Use a soft brush to remove dust from the cracks.
Lack of rotation of the blades or low RPM is often observed when the hair is wound around the motor shaft. The propeller must be carefully removed from the shaft, while avoiding unnecessary efforts and distortions in every possible way. After that, foreign objects are removed.
A hair dryer usually has several heating elements. Visually, they should all look the same. Make sure of this when fixing the hair dryer by opening the case. Detected breaks are eliminated by twisting the ends, soldering and tinning. You can also get thin copper tubes and compress the ends of the broken spiral inward.
Defects in the heating elements during repair are observed visually. A careful inspection will tell you how to fix the hair dryer. It is effective to replace spirals with similar purchased or home-made products made of nichrome wire.
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 disrupted. Terrible crackling and sparks when turned on indicate a motor malfunction.
The motor windings are soldered when repairing the hair dryer from the electrical circuit. For each wire, find a pair that rings. The conclusions are connected in threes, none should hang in the air. Replacing the winding during the repair of the hair dryer is carried out only in the workshop. However, folk craftsmen wind no worse than machine tools. Those who wish will try.
If the windings are in good condition, the brushes are inspected, the copper surface under them is cleaned, and the tightness of the fit is assessed.
The axle must turn freely. When repairing a hair dryer, it does not hurt to lubricate the rubbing surfaces, manually run in problem areas.
The getinax substrate sometimes cracks, breaking the track. Tin the damaged area, lightly cover with solder.
Damaged capacitors swell a little. The upper face of the cylinder contains shallow slots, when the product breaks, the sidewall swells, arching outward. Replace such a capacitor first of all, having found a characteristic defect.
Burnt resistors darken. Some remain operational, it is desirable to replace such a radio element.
Some hair dryers are equipped with self-regulation. The effect is achieved by using a resistive divider, one shoulder of which is an element that reacts to temperature. Further actions are determined by the parameter control implementation scheme. We recommend:
exclude the sensor altogether by breaking the circuit, try the reaction of the device;
short-circuit the wires after this, turn it on, see what happens.
There is a high chance of failure if the device is trained to respond only to a fixed resistance value. It remains to look for a circuit diagram on the Internet or draw it yourself.
Repairing professional hair dryers is more difficult. Design elements are often complemented by smooth controls and additional options like the Care button. 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 is desirable to get a schematic diagram.