#家电故障自己能不能修#
If you are studying science and engineering, if you have strong hands-on ability, if you like to disassemble and repair by yourself, then the electrical appliances at home are broken, you can definitely repair them!
According to the rule of 28, 80% of household appliances fail, the actual cause of the failure is not complicated, and the maintenance is very simple, which is all a job for maintenance personnel to pick up money. There are also 20% of household appliances failure, it is very troublesome to repair, and even lose money if it is not good, these jobs are in the past to earn fame work, sometimes it is not profitable to repair, lose time to build devices!
Therefore, most of the faults of household appliances, as long as you want to fix them, many faults can be repaired by yourself. Especially now that all board-level maintenance is provided, the convenient network era is more convenient for you to learn through the network, and now there is no ancestral secret recipe, and there are pits of knowledge explosion everywhere!
1. Television
Nowadays, TV maintenance is very simple, as long as you know the function of several boards, you will judge the fault. The power supply constant current integrated board is to supply power to the motherboard and LCD screen, and also to supply power to the LED strip light in the screen. The motherboard provides the video drive signal to the LCD screen, and receives the control signal of the infrared remote control and the keyboard at the same time. The LCD screen is the core of the TV, it is a whole, and the backlight unit composed of LED strip lights is behind the LCD screen, and the image we see is the lighting provided by the backlight unit.
1. The TV does not turn on
If the TV does not turn on, first make sure that the power board has +5V output,Then check whether the button board works,There is no problem,That is the problem of the motherboard,Just buy a replacement of the same model online。 If there is no +5V and +12V voltage, then the power strip is broken, just replace the power strip. In actual repairs, there is very little damage to the key plate.
2. The TV screen is black
This kind of problem is the problem of the backlight unit, and the reason may be the constant current plate and LED strip light. In the actual maintenance, the backlight is not lit due to the aging and damage of the LED light strip is the largest, and the constant flow plate will also be broken, but the probability is much smaller, and it is almost eighty-two open.
Replacing LED strip lights requires strong hands-on ability and careful care. For inexperienced friends, there is no need to worry, every step of the disassembly, take a photo with your mobile phone, note down the position of the screw and the length of the screw, and the status of the whole machine. If there is a problem when reloading, you can look through the photos and solve it.
When replacing the LED strip light, you must buy the original light bar, which is exactly the same light strip and does not need to make any changes, which is conducive to the heat dissipation of the light strip. When replacing the light bar, be sure to remember the original position of the light bar and install it as it is, so as to avoid the formation of dark spots or light spots on the screen.
3. The TV screen is blurred
The screen of the TV can be divided into two situations: broken screen and signal source. If the menu is normal, the image is a problem with the signal source, or a problem with the CPU or cache, which can be solved by replacing the motherboard.
If the menu you call out is also flowery, or you can't see it clearly, as long as it's not a color bar or 1/3 white or something, it's generally a motherboard problem.
If it is half of the vertical color bar or 1/3, 2/3 white bar or color bar, it may also be a full gray screen, half normal and half black screen, this problem is generally the screen is broken.
2. Air conditioning
In summer, the refrigeration effect of the air conditioner is poor, do not rush to add fluoride to the air conditioner, you should first dust and clean the indoor unit and outdoor unit of the air conditioner, and clean the dust in the heat sink. Because there is too much dust in the heat sink, the outdoor machine will affect the heat dissipation, and the indoor storage will affect the refrigeration, resulting in the failure of heat exchange, so the refrigeration effect is not good.
Even if it is true that the air conditioner is short of fluorine, it is also sold on the Internet, and there is a complete fluoridation tutorial, and the money to buy it is not much.
3. Washing machine
1. The washing machine does not start
The failure of the washing machine is really not complicated, the core is a board, and this board is sold a lot on the Internet, dozens of dollars a piece. You can directly buy a piece to replace it and see if the fault can be solved. If you are sure that it is not a problem with the board, you can discuss it with the seller and return it.
2. The washing machine motor is broken
If the washing machine really has a broken motor, don't fix it. Although it takes a little time to replace the motor, it may leak without experience, and it will break down again after a long time. Now the automatic washing machine is less than 1,000 yuan, and you can replace it directly.
Fourth, microwave oven
1. No heating
Microwave ovens are durable, although microwave ovens are warranted for one year. The problem with the microwave oven is that it is not heated, and although the microwave is heard humming, the heated milk is still cold when the time comes.
There are several reasons for this failure: transformers, magnetrons, high-voltage fuses, high-voltage capacitors, high-voltage diodes. There are accessories kits sold online, and there are also more repair videos, the most expensive are transformers and magnetrons.
2. Do not start
The problem that the microwave oven does not start is generally that the door switch is broken or the contact is poor, because the CPU cannot detect the door switch signal and cannot confirm that the door of the microwave oven has been closed, so it cannot be started.
5. Refrigerator
1. The refrigerator has been refrigerated
The compressor of the refrigerator is fully sealed, the failure rate is not high, and the temperature sensor and temperature controller are prone to problems, as well as the condenser tube. If the refrigerator keeps cooling, first check whether the temperature switch is at the 7 position, and then replace the temperature sensor.
2. The refrigerator does not start
The refrigerator does not start, many times the starter on the side of the refrigerator compressor is broken, there are sales on the Internet, a few pieces of one, and it is easy to replace.