Monitor power supply diagram

In the last few years, everyone has owned computers and televisions. These devices have a wide range of functions that modern people can no longer do without. Undoubtedly, the most important element of such devices is the screen. But not everyone knows how it works. In order to be able to repair a computer monitor in the event of a breakdown and simply have an idea of ​​the principle of its operation, you need to study the power supply diagram. You will learn about all the features of the power supply from this article.

Design and circuit of the monitor power supply

Most breakdowns, as experienced users admit, are associated with the power supply. Let's take a closer look at its device.

The monitor's power supply consists of two elements:

• network switching power supply (AC/DC adapter);
• DC/AC inverter.

Both elements serve to convert voltage. That is, the first block converts alternating voltage into direct voltage, and the second, on the contrary, converts direct voltage into alternating voltage (DC-AC).

There are several main types of circuits that are often used in modern monitors. Such diagrams can be found on the Internet, where a clear and detailed description of the entire power supply device is provided.

Such circuits can be useful when independently repairing various devices, mainly computers. Including the diagrams, the very principle of operation of the monitor’s power supply is studied.By studying the details and their sequence, you can easily understand why certain reactions occur in the unit.

IMPORTANT! Please note that it is not recommended to repair the monitor yourself if you do not understand the circuit diagrams and do not understand the principle of operation of individual parts of the device. In this way, you can aggravate the problems and you still won’t be able to do it without professional intervention.

So how does a power supply work?

How the monitor power supply works

The functionality of the pulse BC and the inverter should be considered separately - they perform different tasks.

For example, the adapter performs the following functions:

• voltage rectification with a diode bridge and filter capacitor;
• its change and reduction with a special transformer;
• rectification of the converted voltage with diodes.

Please note that two types of diodes are used: ordinary and Schottky diodes.

Schottky diodes have their own distinctive characteristics, which will be important in understanding why they are chosen for high-frequency operation. This is not only the ability to instantly switch to a closed state from an open state, but also increased sensitivity to excess reverse voltage. In this case, the device instantly breaks down.

The difference from an ordinary diode lies precisely in this. To prevent constant shutdowns from occurring, special circuits are used, which are called damping circuits.

Another disadvantage of Schottky diodes is their instability to heat. That is why most adapters also have special radiators installed that eliminate the influence of heat.

The inverter for the monitor is made using a special microcircuit, separate for each device.This allows you to achieve maximum results in the efficiency of the device. With the help of an inverter, the screens are backlit, which is one of the most useful and important functions of the monitor - it gives the user the opportunity to use a computer or other device even in the dark or in poor lighting.

IMPORTANT! Despite the fact that the backlight makes it possible to fully use any household appliance equipped with a monitor, remember that spending long periods of time in front of such a screen is harmful to the eyes.

Thus, the monitor’s power supply is the most important part of its internal structure, which very often fails. To prevent this from happening, you need to constantly take preventive measures and use devices carefully and carefully. If something does go wrong, now you can easily fix the problem, since you know what is inside the monitor’s power supply and how it works.