Masters who are anxious to understand home appliance electricians or home appliance repairers are in

Your appliances only have AC power, so you have to use an inverter, i.e. turn DC into AC through an inverter. Household inverters generally input DC voltage 12-48V, output AC 220V. You can choose one with a power of 400w and you're good to go.

It seems that ** is also sold online. Your method can only be DC, not DC.

Just buy the right inverter!

Hello, before you ask a question, I would like to introduce myself, I am an electrical repair technician. Hope mine can help you. But I want you to understand the power supply part of the amplifier.

First of all, let's talk about the power supply part of the household power amplifier, the input 220V alternating current is converted into several groups of lower AC voltages through the self-even or mutual transformer (the better power amplifier is generally a self-even transformer, and the next one is a mutual transformer), and then through the rectifier wave consideration circuit on the circuit board to form the DC voltage required by each group of circuits.

In this case, you can consider the inverter, but because of the power factor of the home power amplifier, the battery power supply will not be used for a long time, and it is also very troublesome. If you really need a mobile amplifier, you might as well buy a subwoofer similar to a car, the power supply of the amplifier is 12V DC, which is very convenient, and the sound quality is also very good.

I don't know what do you think? If it doesn't help you, please keep asking.

The power supply for attack and defense uses alternating current, that is, the power input of the plug of the power amplifier. In our country's power grid, AC 220V50Hz AC power is used. You said that after connecting the batteries in series and drawing out the two wires, the power supply of these two wires is direct current, and the voltage is 12 batteries.

It's not the same as the alternating current that the amplifier needs. If you want to turn the DC power supply of the battery into the AC power you need, you have to add an inverter (power 400W), which is generally sold in places where electrical appliances are sold.

You can go to your nearest electronics market or electromechanical market to buy an inverter, which is a device that rises 12V DC to 220V AC, the power is preferably 200W, the price is not expensive, the method you said is not feasible.

It is necessary to use an inverter, referred to as an inverter, which turns the voltage of the battery into 220 volts, and there is a hole for direct plugging in the power amplifier on the inverter.

The size of the battery can be calculated, the power amplifier is 220 watts, then the power of the battery can not be less than 220, and the loss of the inverter should be added to the specific person who sells it. The power of the battery is the battery voltage * ampere, and the battery is marked.

It is enough to buy a 300-watt inverter.

1, the school has a more learning atmosphere, and the master has more experience, this depends on you, 2, how long to learn, this has to be based on personal receptivity and your master's teaching level and his ability, as well as to see if he will teach with all his strength, I used to learn from others, do more things when I was an apprentice, and show performance, in short, I have a good relationship with the master and win his recognition.

First of all, go to school to learn the theoretical foundation, without the theory you will not improve the level, to the maintenance company as an apprentice without a foundation is not good, because no one really teaches you, after the foundation can go to the internship to learn more experience, if you work hard for 8 months you can open a store, I just studied in school for half a year, two months of internship after opening a store, of course, the level has to be slowly improved.

This is the starting capacitor of the range hood motor, and it will not rotate when it burns the motor.

It is a common accessory, 4UF. You can take it to the shop that repairs household appliances and ask, usually there are a few dollars.

This is the starting capacitor, it burns the motor and it can't start, but you can turn the motor by hand to see, if it turns it is its problem. This capacitor is generally available in home appliance repair shops. 4uf 450v.

This is a non-polarized capacitor with a capacity of 4 microfars with a withstand voltage of 450V, which may be purchased at general electrical accessories stores or home appliance repair points, or the capacitance is slightly different, and the capacitor capacity is reduced and it is easy to cause slow start-up. Be careful not to buy electrolytic capacitors with positive and negative leads.

It is a motor starting capacitor, the specification is 4 microfar, and the withstand voltage is 450V. You can buy it at a local shop that sells radio equipment or at a home appliance repair department.

1.The line scan circuit load section of the damping diode.

2.The field scanning block power supply part is replaced with a new one.

3.Reverse capacitor must try a new one.

4.Pillow type correction, S correction capacitance Power supply capacitance 47 micromethod 250V5Switch-on circuit, C1815 A1930

Hello, if the circuit is guaranteed to be fine, you should check the triode connected to the photocoupler! Break a leg!

See if there's anything wrong with the memory data.

Check whether the standby voltage of the TV is normal, whether it is a thermal breakdown fault?

This failure mainly occurs in the CPU control circuit. It is estimated that the CPU is heating too much. Give it a try.

What movement? What is the power supply? Skyworth's switch has a reset on it,Recently, I have encountered several cases of switch reset problems!

These are special tools for repairing refrigeration equipment, because you don't know what to expect when repairing, if you want to not fold your hands, it is best to have them, of course, you can also buy some of the commonly used according to your specific situation, and buy it when you have money if you don't use it.

In fact, the circuit part of the air conditioner refrigerator rarely fails, only mechanically. Such as pipe leakage, etc., so it is obvious to prepare.

I can ask you this question, and I brought two apprentices, both of whom are college students majoring in electrical appliances. I think the master's favorite apprentice is first of all to be diligent, if you are not diligent, then it is basically not very easy to learn.

First, it is necessary to love to use your brain, and if you encounter a problem, you must analyze the reasons rationally, instead of waiting for the master to solve any problem, and not use your brain. Of course, don't act rashly if you're really unsure, but you can't help but think about it. For example, the master's method of dealing with it is different from the method I have in mind, so I have to think about why?

What am I doing wrong? If you don't understand something, take the initiative to ask for advice. In this way, your business technology can be gradually improved.

Second, to be humble, if the teacup wants the teapot to fill itself with water, the teacup must be lower than the teapot to drip. Although we don't talk about the old concept of being a teacher for one day and a father for life, the necessary respect and modesty are the bottom line, and third, it is best to become a bosom friend with the master, both a master and an apprentice and a friend, so that it is the least embarrassing. In this way, the master can speak to the apprentice more casually, and if the apprentice and the master are together, there is no feeling of respect and inferiority, and you can better communicate with the master.

My apprentice and I are like this, when I go out after work, such as eating and drinking, we are all called brothers, hehe.

Humble, studious, self-motivated, diligent but not stupid.

The high-frequency head will have different fault manifestations according to the different parts and degrees of damage, mainly as follows:

1.No signal is received, there is only noise on the screen and no image signal;

2.Only a part of the TV signal can be received from the VHF channel or the UHF channel;

3.The received signal is extremely unstable and may be distorted, deformed or even negatively imaged at any time;

4.When the antenna plug is in good contact with the socket, it is not good to receive it, but the antenna plug can be slightly removed from the socket to receive a better image.

The above manifestations correspond to various damage forms of high-frequency heads, such as the damage of high-level discharge tubes (many high-frequency heads are used by different tubes in the V section and U section to serve as high-level amplifiers), the damage of AGC tubes, etc., some may cause no signal to be received at all, and some may cause the deformation of the signal. Of course, if the fault can be basically determined in the high-frequency head, then replacing it is undoubtedly the quickest and most convenient way to deal with it.

Snowflakes will appear when the normal TV does not receive the radio station (some TVs will have a blue screen when they do not receive the radio, at this time the blue screen should be canceled, or the TV set should be in the state of tuning, the purpose is to display the snowflakes), if the snowflakes are normal (as if there is no antenna plugged in), there is not much possibility that the high-frequency head will be bad.

If the high-frequency head is broken, you won't be able to search for TV programs, and you won't be able to watch TV.

If the high-frequency head is broken, as far as the fault phenomenon is concerned, it will show a variety of fault phenomena, the most common is that the search station can not be found, less Taiwan, treadmill, and the frequency head search station has 3 bands, VHFL, VHFH, UHF. There will be a certain band that cannot be found,There are still relatively few bad high-frequency heads on TVs,First of all, from its working voltage,The current high-frequency head power supply voltage is 5V。 Unless it is damaged by thunder, it is very likely.

The high-frequency head has been replaced. Blue screen. or a whiteboard... The avatar is not clear, and the interference is large. Wait a minute..

Majoring in electronics, I don't know if you are interested in electronics. I also studied electronics. There are 45 people in the class, and it's not a prestigious school, but I'm interested in electronics.

Otherwise, I wouldn't have chosen this school! Now there are very few people in the class who are engaged in this major, and there are only more than 10 people. And most of them go to corporate units to work as electricians.

It's not just a person who is engaged in the repair of household appliances. I'm going to do home appliance repair right now. I've been doing it for over 10 years!

This industry is just about supporting your family. If you don't starve, you can't send it. When I first chose this line, it was the first place of interest.

Didn't think about the future. I think the domestic home appliance maintenance industry will not be easy to do in the future. The radio's products have plummeted all the way, and the maintenance has become lower and lower.

The only refrigeration industry is okay, but the seasonality is too strong, and it will be dry for 23 months a year. If you have to choose this trade, learn to refrigerate first. A confidant opens a shop, simply repairs it by himself, finds someone to repair it if it is difficult, and learns while doing it.

You can only learn quickly by doing it yourself. I wonder what you know about it? If you have a high level of understanding, you can learn quickly, and you must be patient when you first practice, and it is normal to study for 78 hours, and there is no progress without studying.

In fact, it is a question of career planning.

If you simply want to make money without a skill, it may not last long.

Therefore, doing home appliance maintenance is a skill learning exercise, which is worth it.

Of course, the first step in learning is to be interested; Interest can be cultivated.

When I see any household appliance I usually see, I will want to figure out his principle;

Which appliances have been repaired by yourself, whose household appliances are broken, and you have repaired them, etc.;

In addition to interest, we must also use more hands, brains, and not be lazy;

This principle is the same, no matter what you do, you must be diligent, and you will reap the rewards if you pay;

Sooner or later, there will be a harvest, please believe;

There is also the need to have a plan, to know how long you will learn, and then to be self-reliant;

After all, you can't always be an apprentice, and a soldier who doesn't want to be a general is not a good soldier.

Finally, I wish you to stand on your own feet as soon as possible!

As soon as you look at your problem, you are a maintenance worker who is not diligent in learning. On your question, you can write several thick books, such as: "Inspection and Repair of Air Conditioning Failure", "Principle and Maintenance of Household Refrigerator", "Electric Fan Repair and Motor Repair", "Principle and Maintenance of LCD TV", "Household Microwave Oven", "Common Troubleshooting of Computers and Printers".

Tell me, does your question involve the entire scope of home appliance maintenance? I haven't expanded this "appliance" of yours to anything other than appliances. In this limited space and limited time, it is impossible to become a fat man in one bite.

Meals should be eaten in one bite, things should be done one by one, knowledge should be accumulated little by little, and skills should be improved step by step. If you ask questions like this now, it is tantamount to scratching your boots, what can you gain by yourself??

If you are sincere in studying, you should concretize, clarify and concise your questions in the future, such as: How to repair the Hitachi R-C6800C refrigerator if it does not start? As for how to draw inferences from one case after getting the answers from your friends, and integrate them from one to the other, that is something you can summarize by yourself.

It is recommended to check whether there is voltage first, and check the equipment after the voltage is normal.

Wait for the master to repair, look at the side and ask if you don't understand, and go to the electrician forum or post bar to see if it's okay.

Actually, I am also a newbie to electrical repair.

Go to the repair shop, be careful of the electricity to you.