Griss microwaveReference quotation for maintenance:
Spare parts maintenance reference prices
Power lines, $20-40
Switches, $30-40
Temperature sensors, $50-60
Steam sensors, $40-50. Cooking failure
High pressure tube, $50-60, no heat
Thirty-five-three years of practice, five dollars for the association
Timer, $80, automatic stop
It's 60-7 from zero
Turner, $80-90
Magnificent 360 question and answer tube 150-170
Panel 80-90, no microwave output
60-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-six-s-six-six-six-six-six-six-six-six-six-six-six-s-six-six-six-six-six-six-s-six-six-s-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t-t
Two, three, thirty-thirty
Capable, $50-60. No microwave output
Barbecue pipe 55-60. Barbecue cooking's not working
As a rule, microwave units are maintained for one year and the main spare parts, such as magnetic tubes, high-voltage tubes and electric appliances, for two years. Following a microwave failure, it is possible to contact the company's passenger service to confirm whether the warranty has expired, to consult the network address and telephone number of the maintenance centre, and to find itself some of the more reputable maintenance centres for the quality of service and the price of maintenance。
Common microwave malfunctions and maintenance methods:
No start
Non-start failure means that when a microwave oven is plugged into the power source and the furnace door is closed, the rotation watch is set to walk to the acidic time button without the sound of the furnace, the wheel is not turned and the stove cannot be activated. The failure to activate is one of the most visible failures of the microwave, and the eye is also associated with the breadth of the electrical surface, which is a relatively difficult failure to judge。
The main causes of non-start failures are the melting of the fuse pipe f1, the breaker of the superheated st., the electrical oxygen, and the rhythm of meals. Of these, f1, st and power circuits are easier to diagnose and process and, as will be mentioned below, the main man-to-man is only interested in talking about the failure of the security switch. Most of the problems with s1, s2 resulted in failure to activate, and the failure of the security chain switch 3 resulted mainly in failure to burn the fuse pipe f1 (which could not be activated after the fuse was broken). For example, the main chain switch s1 should be connected when the furnace door is closed, and if the s1 opening road is damaged, whether the furnace door is open or closed, the microwave is not able to access the power source and activate. Normally, s1, s2 and s3 are placed on the shelf of the project's plastic feed first station, where they have been fixed in manufacturing and generally do not shift except for the hard sound of jane loonlu or the looseness of the fixed plastic foot-drive slabs that want to be stubbed, so that failure to activate or burn the fuses caused by the shift is less common. More frequently in practice, the switch switch and switch toucher pole (i. E., two hook-like plastic poles on the door of the furnace, or angular slender called door hooks), and the switch bump on the plastic stand are damaged or bad. When the parts are examined, if the cover of the microwave is removed, it is clear that the oxen glucose will be able to evaluate the movement between the needles in the mail, open and close the doors, and watch the foods as they are performed in the short season to check their movements, and if the actions are the most normal, check whether the switches themselves are normal. Since s1-s3 is designed for safety and is highly mobile, most manufacturers choose to use more durable, reliable, dedicated micro-switches, which can normally be used for long periods of time, but if the switch itself is of poor quality or in poor working conditions (e. G. Excessive contact), the useful life is significantly reduced. If the switch is damaged because of its age of use or for the reasons stated above, the test works may be removed and if the damage is seriously unrepairable, new items shall be replaced. Note that it would be preferable to have a prototype or direct replacement, if it were to be selected, that the outer size would be appropriate, which would not be suitable for the plastic stub inside the machine, and would be difficult or even impossible to replace. In addition, sl, s2 and s3 have essentially the same appearance, but the switch function is different, so there is no error in the selection and installation. A number of switch casings are marked with electrical symbols and are therefore easy to distinguish; in the absence of symbols, it can be measured in a universal form to determine whether it is open or closed and the corresponding source。
No heat
This failure means that the food is not hot after the microwave has been powered, but the general stove light is lit and the wheel rotates. Unhot failure is mainly due to the lack of microwave output in the microwave. The stove lights are lit and the wheel turns, indicating that the circuit before the high voltage transformer is generally normal, and if the power control switch is also normal, the failure range is in the high voltage transformer t and subsequent circuits for two main reasons: the magnetic pipe power supply circuit is not working and the magnetic tube is in poor or damaged contact. Care should not be confused with non-starting failure in cases of unhot failure. Once the shell has been removed, the power control switch 5 breakout should first be ruled out, and usually a mass gauge can be used to determine the power control switch 5 after a temporary short-link test. The parts and components of the high-voltage circuits and their connection end are then checked. Since this part of the circuit consists of a total of 4 and 5 parts, even on a case-by-case basis, it is usually possible to check first for looseness or poor contact between the thrust and relay plugs of the magnetic tube mag, and then, if it is normal, then for high-pressure diode vd, high-voltage capacitorsc, high-voltage transformers t, magnetic tubes and their associated relay plugs and welding points, it is usually possible to find the fault site very quickly. Practice has shown that high pressure diodes and high pressure transformers are usually the main cause of damage, especially in the past, so that when such failure occurs, the tube can be examined first, often with a multiplier effect。
Insufficient heating
Inadequate heating, also known as slow heating, means that microwave stoves use the same firepower to prevent the same food from cooking compared to normal times, but the cooking time is significantly longer than normal, even making it impossible for some of the foods requiring high-fired cooking to cook properly. This failure is an expression of a reduced microwave output power. In the case of normal municipal power supply, the main cause of the failure is the ageing of the magnetic tube or the low electrical voltage of the magnetic tube light or the anode. Magnetic tube aging is of two kinds, one being natural aging because of the length of its use. The design of a magnetic tube usually has a service life of 2,000 hours, with an average of 30 minutes per day for microwaves, and a life of 4,000 days, or 11 years, but even at this time, the output power of the magnetic tube is not immediately and significantly diminished, but is ageing, so it is generally less likely to encounter a natural ageing magnetic tube. The other is premature failure, which is often due mainly to the poor quality of the magnetic controls themselves or to the fact that they have been used for longer periods in bad circumstances. As a result, maintenance failure with heating can usually be preceded by a check of the electrical voltage of the magnetic or anode lamps (checking their power circuits and connections at the end of the line at the time of power outage), focusing on the contact at the end of the connection of the magnetic tube fuses, especially when the use of a long microwave oven is more likely to cause poor exposure. Dismantling the shell of such microwave furnaces tends to reveal a large amount of oil and dust accumulated in such components as magnetic tubes and in many parts of the case, and to view the magnetic tube lightlights and their cavities. They often reveal the erosion of the lead foot and the oily green stains. If the plugs are loosely connected to the light wires, exposure to electrical resistance increases significantly, resulting in a low light wire voltage, which reduces microwave output significantly. In repairing such a failure, it is only necessary to draw the light to the ground, then to use the alcoholic cotton ball, and then to use the tip of the plier to flatten the tip of the foot, so that it can be inserted and in good contact with the light. If there's no problem with the power supply, it's basically an ageing magnetic tube. This can be done by switching the magnetic control tester and by measuring the normality of the filamental resistance of the magnetic control and by checking whether the magnet is fractured. For poor heating failures due to the ageing of the magnetic tube, it is usually the replacement of the tube that is the perfect solution. In addition, if the capacity of high voltage capacity is significantly reduced, the magnetic controlled tube anode voltage and output power are significantly reduced, and there is also a lack of heating, although this is usually less common, with most of the failure of high voltage caps being either punctuated or broken. It should be noted, in particular, that, in practice, underheating failures are often associated with 220 v power voltages, often with some confusion that municipal voltages are normal, but because of greater internal or exposure to electrical resistance on the power lines, the large currents that flow through the microwave work create greater pressure reduction on the wires or on the trunks, which makes the stoves physically work with power voltage significantly inadequate, thus causing the heating to slow. Large-scale internal resistance to power lines usually occurs on power panels, fuses, power lines or power lines, and although it is significant, empty measured voltage tends to be normal and therefore obscure. In many households, the problem must be addressed and addressed first and foremost in maintenance, given the varying degrees of poor usage or connectivity of indoor power lines and the poor quality of power lines, power panels or outlets used. The measurement of municipal voltage requires the measurement of the charge load, and should not be judged solely by empty voltage。
4. No rotation
Such failure refers to microwave work, except for the failure of the wheel, which tends to heat up the food. The main cause of the failure was damage to or failure of the switch. During maintenance, only 220v voltage on the switch engine was checked and, if normal, the power was damaged. If not, check the breakpoint of the power supply line. If you do not want to carry an electron survey, you can also check whether the circuits are normal and if the rotors are stuck or not, and if not, the corresponding power lines. Practice has shown that electrical damage is common. Microwave ovens mostly use small-power synchronized power machines at speeds of 4 and ~ 8 and repair the next reference article. Three main reasons for the damage to the rotor transformer were the spilling of microwave stoves, such as boiled milk, and the flow of liquids into the electric generator, causing damage such as short circuit burning or gearing; the second is the long-term operation of the microwave oven in a high-humid environment, where the electrical circuits or fuses are corroded; and the third is the frequent blocking of the wheel during the work of the microwave, which is damaged by the overloading of the electric machine, due to, inter alia, excessive cooking. For both maintenance staff and users, microwave stoves are used to avoid such occurrences as much as possible. It is most convenient to check the microwave circuits, and for most microwaves, the machines can be seen and tested or repaired by taking out live objects such as the wheel and wheel racks inside the oven, then turning the stove over to the bottom, moving it up, then wringing the screws of the panel or plate that corresponds to the position of the transformer。
Microwave ovenSelection techniques:
1. Selection of specification varieties
At present, microwaves are concentrated mainly in 700-900 w, and it is more appropriate for households to choose 800 w. In terms of control, two categories, computer and mechanical, and functionally, barbecue and non-brackets. Computers are suitable for young people and more educated people. Mechanical is best suited for older persons. People who like to eat barbecue may buy barbecue microwaves。
2. Choice of product quality
Appearance options include modeling, colour, skin quality, manufacturing processes, etc. It is easy to feel, and it is hard to know, that, in general, the manufacturing process is well-developed, and its intrinsic quality is good, and a good microwave is beautiful, coloured, product surfaces are free of mechanical bumps and bruises, panels are flat, and components are closely aligned。
3. Safety choices
Microwave ovens are essential for the choice of microwaves to be able to withstand frequent use and high temperature and static. Market name products currently meet national standards for safety. In selecting microwave ovens, each of the parts of the door can be squeezed with a finger, open the door, the surface of the good microwave door is squeezed with a good hardness, and around the door is a place of “strangulation” to prevent microwave leaks, which is typically black, strong in a warm, unmoisture, difficult to press, silent in a timely manner, open the door “squeaky” and clean without dragging water. Low-quality microwave stoves, mostly organic plastics, single-story seals, much loosed fingers and even “creaking” sounds, with long-lived microwaves prone to leaks, are a great danger to humans。
4. Choice of brand price
The market price of microwaves ranges from 500 to 2,000, and the quality of their functions inevitably varies, and the choice of brand is less blind to consumers. For consumers, it is essential that the function apply to themselves as long as the price is acceptable。
5. Variable frequency
It is believed that the word “moderity” is familiar to everyone and that the use of variant technology on air conditioning is quite common. In fact, microwaves also have frequency and frequency fractions. Technically, the fixed-frequency microwaves tend to make heating uneven, thus affecting cooking performance. The variable frequency circuits of the variant microwaves can arbitrarily convert the fixed power frequency of 50 hz to a high frequency of 20,000 hz ~ 45000 hz, thus changing the power frequency to control different power output and free control of fire power。
Six. The inside of ceramics
Microwave ovens have many types of internal urchin, with the highest relative capacity for ceramic heat transfer, keeping more heat in the cavity, making heating stronger and easier, while power consumption is kept to a minimum. Ceramic urchins also reflect large amounts of microwave infrared, not only to maintain the food taste and vitamin nutrition, but also to make the barbecue more even. Courage in ceramics adds antibacterial elements that inhibit bacteria from growing and breeding on the surface of the cavity of the furnace and prevent the creation of alien odor. Ceramic surfaces are as smooth as glass and are not easy to accumulate and clean of oil stains and stains。
7. Smart digital temperature
During the microwave heating process, the water in the food is distributed in the form of water vapour, and the humidity sensors automatically regulate the cooking time as the vapour levels within the cavity change. Microwave furnaces with smart digital temperature control techniques use special humidity sensors to measure the vapour concentration of food dispersed in heat, thus analysing the length of cooking required to provide the best possible fire and time。
