Lesson #20. Computer connectors
So, we have a system unit, a monitor, a keyboard with a mouse and various peripheral devices. Let’s figure out what and where is connected.
As we already know, the motherboard is the main payment of the computer. A processor, RAM and additional devices such as a video card, network or sound cards are installed on it. Also, these devices can already be built into the motherboard (integrated into it).
Motherboards are designed so that the connectors of integrated and installed devices are placed on one side. Accordingly, computer housings are designed so that all the main connectors are displayed on the rear panel of the case. Some of the most popular connectors can be displayed on the front panel (for example, the connection connector connector or a USB connector).
Various models of motherboard and additional devices that are installed on them can have various connectors. But there are a group of connectors that, with a high degree of probability, you will find on the rear panel of your computer.
Attention! Before connecting devices to the computer, be sure to make sure that the device and the computer itself are turned off. When connecting the onputed devices, there is a threat of damage to the device chips, and, accordingly, the device is out of order.
And so, for connecting the keyboard and mice, connectors that are called PS/2 are used.
These connectors differ only in color: green is designed for the mouse, and purple for the keyboard. As a rule, the mouse and keyboard connector also have green and purple color.
Mice and keyboards are increasingly used using USB connector (Universal Serial Bus. a universal sequential tire). This connector has become very popular and with the help of it a huge number of different devices are connected to the computer, starting with flash drives, external hard drives and ending with printers, scanners, cameras and video cameras.
USB connector, unlike other computer connectors, allows you to connect and disconnect the devices during the computer operation.
After connecting the device to the computer, the operating system automatically defines the device and tries to independently find and install additional drive programs on the computer, allowing to control the device using the operating system. If the operating system does not manage to independently find the necessary driver, then it will turn for your help by calling the appropriate dialog box to the monitor screen.
USB connectors have become so popular that modern motherboards are installed 2, 4, 6 and even 8 connectors. Often, manufacturers of computer housings place several USB-shares on the front panel of the computer for a more convenient connection of flash drives, cameras, etc. devices.
Next, consider the most important connector designed to connect the monitor. This connector is usually on the video card, which is located inside the system unit (installed on the motherboard). In inexpensive office computers, the video card can be integrated into the motherboard and the connector for connecting the monitor can be in another place on the rear panel of the case.
There are two connectors to connect the monitor-analog (VGA or D-SUB) and digital (DVI, Digital Video Interface).
The cable for connecting the monitor to the computer is usually included with the monitor and it can also be designed for the VGA or DVI connector.
If you have LCD monitor, that is, liquid crystalline, then it makes sense to immediately connect the monitor to the DVI connector. The fact is that the video card forms the digital signals with which LCD monitors work. CRT monitors (in which an electron-ray tube is installed) use an analog signal. Therefore, on the video cards there is a digital signal converter into an analog (VGA connector). If you connect the LCD monitor to the D-Sub analogue connector, then the signal passes a double conversion, first from the digital to an analogue and then in the monitor itself in the digital. As you know, any transformation occurs with the loss of information, that is, with the loss of quality. Most likely, you simply will not see the loss of the quality of the picture on the monitor, but it is still more logical to use the connectors for their purpose.
So, to connect the monitor to the system unit, use the corresponding cable (with D-Sub or DVI connectors). One end of the cable is connected to the monitor, the second to the connector on the video card. To prevent accidental disconnecting of the cable, the connectors often have screws with which it can be fixed.
The so.called universal ports COM (Communication Port) and LPT (Line Printer. line printer) are also found.
COM port, which is also called a sequential port, has already practically out of use. It was previously used to connect a modem or computer mouse. Now you can find uninterrupted power sources that are connected to the computer via COM port. This will get the opportunity to manage the UPS through a special program that comes with the source. COM port is usually located on the motherboard and there may be several.
How to connect a new computer?
In order to connect a desktop computer, there are several more steps and nothing complicated. Below is the image of various ports that are on desktop computers. Computer models differ, and any of the ports indicated in the figure may be absent on your computer. However, all computers have a combination of these ports, and it is useful to familiarize yourself with them.
Connect the computer cables correctly?
The main ports and cables that you will need are:
Connect all the cables to the corresponding connectors on the computer, it is impossible to confuse them, one connector does not look like another and physically confuse that where to stick it simply does not represent the opportunity.
Connection of computers through a special USB cable
The option under consideration implies the use of a specialized USB-shnours with an integrated chip, the so-called USB Link module. Accessories are available for ordering on websites of various computer online stores.
Often, a flash drive or drive with drivers for automatic settings of the correct functioning is supplied to the USB-cable kit. A separate file manager (conductor) necessary for the subsequent exchange of information may also be attached here. Also, modern versions of Windows can automatically select and install the required drivers.
How to connect a computer
You bought a computer, monitor and peripheral devices for it. Brought from the store, but how to connect all this farm? For a novice user, it will seem that this is a difficult task, for the implementation of which a specialist will be required. In addition, the specialist needs to pay. So let’s become this specialist and connect the computer on our own.
There is nothing complicated in connecting a computer. All connectors are standardized, and it is simply impossible to turn on any device in the wrong way. Although if you try
As a rule, all computer farming is located in this way:
- The monitor is on the table and is located at a comfortable distance from the eyes. The distance depends on the size of the monitor screen, but there should be at least 60 cm.
- The system unit is placed on the floor or special shelf at the bottom of the computer table. The place for the unit should provide free circulation of air in order to avoid its overheating.
- The keyboard falls on the retractable shelf of your computer table. If you have a simple desk, then the keyboard can be placed on the table with a monitor.
- The mouse is located next to the keyboard on the right or left, depending on which hand it is more convenient for you to operate with the mouse.
- The speakers are located on the sides of the monitor in one plane or a little behind.
- The entire periphery is located for free space, it all depends on the length of the cables.
The best option for accommodating the entire computer farm will be the presence of a special table, the so.called computer. There are a great many tables of this type on the market: corner and straight tables, with various compartments and shelves for various devices.
If you have a laptop, then everything is simple: you only have to throw off the lid and press the power button. The periphery is located in any convenient place where the power cables reach and connection.
Self.installation and connection of a computer
- Remove the monitor, system unit and peripheral devices from packages. Put the monitor on the table, and the system unit on the floor or special shelf in the computer table for it.
- At this step, we connect the monitor to the system unit. Take the video cable that comes with the monitor. You will recognize its connector, usually it is a cable with VGA or DVI connectors. VGA cable DVI cable
Connect one end to the monitor, the other to the system unit. If the cable cannot be inserted, then do not make an effort, just check the correctness of the connection. The connectors use elements that exclude incorrect connection: in the DVI there is a key that excludes improper accession, and in the VGA connector one side is less than the other. After connection, do not forget to tighten the mounting screws.
After all the components of your system are reduced into a single whole, turn on the red key on the network filter. The voltage indicator will light up on it. On the rear panel of the system unit, switch the power key to the “inclusive” position.
Press the power button on the front panel of the monitor and the system unit. The computer will turn on and the operating system will start loading.
As you can see, there is nothing complicated in an independent connection of a computer.
How to connect a system unit
When buying a computer beginner. a person who has a little idea of PC in general. A certain assistance is required in the assembly and connecting this device. If there is no way to call a specialist or friend, then this instruction will come to the rescue.
Take the main cable designed to power the system unit from the network. There will be a fork on one side, with another connector in the form of a trapezoid. It is necessary to turn to yourself the system unit of the rear (back) side, where there are many connectors such as “mom” and “dad”. We take the power cord from which the Mom connector is located and attach to the “Dad” connector located at the top of the system unit. Do not connect it immediately to the network.
We put a monitor next to the system unit to connect the monitor to the system unit. To do this, we need the same power cable from the network. The principle is the same, only now we connect the cable to the monitor. We also do not connect it to the network.
We take the next cable. To connect the monitor and system unit (VGA-cable). We connect to the monitor, the other to the system unit, first you need to find the VGA connector on the system unit. After connecting this cable, twist the plastic bolts with your fingers or a small screwdriver. This is necessary for a constant and stable signal.
Connection of the keyboard and mouse are very similar. The only difference is the color of plugs and nests designed for these devices. Keyboard and mouse nests (PS/2) are below the power supply nest. The keyboard. Lilac color, and at the mouse. green.
Recently they began to produce devices under the USB integration. In this case, everything is much easier. You need to insert the plug of the device you need (keyboard or mouse) into the USB port.
The last step in the connection will be the connection of the columns and the system unit. 2 cables depart from the main column. power cable and audio cable. We need to connect an audio cable to the system unit. Find a round nest of green on the system unit and connect.
Now we need to connect all the cables of power with the outlet. Here you can use a network filter (pilot). After connecting all devices for the operation of the system unit, we need to turn on the computer by pressing the computer.
Basic devices when connecting to the motherboard
Fixing the motherboard on the case. Usually there are 4 racks (sometimes more, but 4 will be enough), on which you need to fix the motherboard with bolts. With this procedure, problems cannot arise, t. to. The main and the only condition is to be able to use the screwdriver. You need to tighten the bolts tightly, but without applying excessive efforts, so as not to break the motherboard. If the device is stably staying in the housing and not “driving”, this is more than enough.
Racks are needed to separate the motherboard from the body: they protect it from short circuit, contribute to additional cooling, and t. P.
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Food. First of all, regarding devices, you should connect a power supply unit. Its installation on the case does not cause problems. Since many remaining cables will be connected to other devices, in addition to the motherboard itself. This will provide unhindered access to the accession of other devices.
Connect the power unit with a connector to 24 contacts (sometimes 20). It will not work to confuse him with other loops (he is one). This connector looks as follows:
The nest for the power supply is usually located on the edge of the motherboard. It is impossible to confuse it. this is the only connector of such a width into two rows. No other device will be connected there. When connecting, this should be done carefully, slightly pressing. to the click, so that the latch on the connector and the train coincide. The rest of the train have fixators in the same way.
All other loops from the power supply are completely different from each other, so there will be no questions which cable to which device is intended. If you doubt, look for guide elements and designations. Or use the documentation for the purchased power supply/maternal board.
In no case do not connect the train to 20 contacts in the connector for 24 contacts and vice versa. This will cause irreversible damage, the repair of which will be very expensive. Rule number one. always check if a specific power supply is suitable for the motherboard model used before buying. This applies to any other devices except USB 3.0.
Winchester. A train from a hard disk is wide and not very. It all depends on the plug. There are two varieties: IDE and SATA.
The black connector (left) is inserted into a hard drive, and blue (right). into the motherboard. This is what the place on the motherboard looks like where you need to insert the IDE plug from the train (blue connector, between two black above and below).
Regarding the SATA of the train, it is much smaller and inserted into the connector with the designation “SATA1”, “SATA3”, etc. D. The designations can be any, but always contain the keyword SATA. It all depends on the model of the motherboard.
The discrotor, by the way, is installed in the board in a completely identical way. But his IDE train joins the shorter connector (in the previous picture it is black, located just above blue). Otherwise, including SATA, a connector, connecting a disco to the motherboard identical to connecting a hard disk.
This is just an example, since such connectors can be of different shapes (vertical, horizontal) and are located in different parts of the motherboard.
You also need to connect the connector from the power supply, taking into account the guide elements. There are usually no problems with this. The connection of the hard drive to the motherboard is completed on this.
Video card. Connecting a video card to the motherboard is a completely unlikely process, but with specific tricks that you need to know so as not to break the fixers. On most motherboard there are clamps on the likeness of the following:
They are completely identical to the fixers on RAM. But sometimes there are not quite obvious fixers, to know about the existence and principles of work which every user needs. Before connecting a video card, carefully study the operation of the latches. If necessary, disconnect (or attach, if the mechanical type clamps) the device may arise problems.
The video card itself is shown under the number 8:
Vertical blue connector and there is the place where the video card is inserted. Blogging a piece. a standard latch. It is impossible to make a mistake, since it will not work to insert the video card due to the guide cut on the connector.
Further, an additional power source in the form of a cable from the power supply is connected to the video card (for the vast majority of modern models). Often, this is a connector with 4 contacts, but there are 2 wires for 2 contacts or 1 wire, but for 8 contacts. It all depends on the model and manufacturer of both the video card and the power supply. At the end, a cable from the monitor is connected from the outside of the system unit. the video card is completely ready for use.
Cabinet fans (coolers). To connect these devices, it is enough to fix them with bolts in appropriate places (selected individually or following the documentation) and connect to the motherboard:
- CPU_FAN (CPU. central processor; fan. fan). The nest is designed to connect the cooler to the processor. Do not try to connect a train into it for 4 contacts if there are only 3 holes for them and vice versa, it is better to purchase a fan suitable for this connector. If the cooler is incorrect, the cooler can quickly burn out or stop working, and this threatens overheating and breakdown of the central processor. Which, by the way, is the most expensive device in the computer.
- Sys_fan (System fan. system fan). The nest is created for all other fans in the housing. Cools for blowing and other cooling in the system unit should be connected to this type of connectors (the sequence does not matter, you can connect to any of them). Typically, there are several such connectors, depending on the model of the motherboard (sys_fan1/2/3 and t. D.). All of them are signed on the “motherboard”, to find it will not be difficult.
The main thing in connecting the motherboard is an understanding of the designations, a guide on guide elements (tips; lack of contact, cut in a nest, false “pin” in a plug, etc. D.) and neat connection. If you follow these rules, then the next time you will not need any help in connecting the “motherboard”. everything is so easy and simple.
Setting the phone
There are several parameters in Android that affect Connect with a computer. Sometimes the user selects something or changes something, but it happens that the connected device by default works in the wrong connection mode.
Almost all modern mobile phones can connect with a computer in different modes. The “charging” parameter is often default, that is, when you insert the cord into the port of the system unit and the phone’s nest, the second begins to charge, and does not open access to the storage. But this is easy to feature, for this you need:
The device is reoriented to transfer files, and you can copy them, move, create folders, etc.
Driving manipulations on USB
Sometimes the debugging helps. To find it, you need to unlock the menu “for developers”, for this go to “Settings”. “On the phone” and seven times in a row, click on the “assembly number”.
Attention! In miui, open “Settings”. “On the device”, click on the “version of miui” seven times.
Return to the main menu, open the menu that appears at the very bottom. Slue down a little down until you stumble upon “debugging by USB”. By default, it is turned off, turn it on, it can help if the Connect with the computer is not installed in any way.
You can also try to disable it if it is initially active. Sometimes it helps.
Why does the computer not see the phone when connecting via USB?
Briefly consider the main interference that may occur if you decide to connect the phone to the computer via a USB cable.
The reason is hardware malfunctions
Often the cable that you connect breaks somewhere inside, so the contact “does not go”. Make sure the cord is in good condition, try to charge the phone through the outlet with it. If the current has gone, then the cable is a worker, the port of the device too. However, in case of detection of damage, replace the cord with a new original or similar in quality, which will be compatible with the phone.
Insert a USB flash drive into the computer, if it is determined. the nest in the PC is also in order. Otherwise, test the rest of the nests and use good.
The reason is the old operating system
Windows XP owners cannot always freely throw files on a smartphone due to the lack of the necessary components. You can download them from the link www.Microsoft.COM/EN-OUS/Download/DETAILS.ASPX?ID = 19153 from the official website Microsoft. After the installation, everything should earn if the problem was only in this.
The reason for the installation of the device driver
This is one of the most unpleasant reasons, but fixing it is not as difficult as it might seem. Let’s start! Do the following:
When the process ends, the phone must identify your smartphone.
The reason for the lack of universal adb driver
This driver is also very important and is responsible for the conjugation. Download it by the link Adb.ClockworkMod.com. The component will help if it is not possible to download or install the driver or tablet drivers. It is designed for the functioning of Android Debug Bridge, as well as all Android synchronization programs with PC. Very often, its installation helps to solve the problems that arise when trying to connect the phone to the computer via USB.
There are no particularly difficult to connect and fix non.betrayals, and often the connection is normally passed by itself. However, if you are faced with problems, then first take the simplest steps to eliminate them, and then move on to more complex.
Hello, friends! In this article we will figure out how to connect a monitor to a computer. Under the computer we mean a stationary computer. With laptops, netbooks and ultrabooks, everything is the same.
The first thing that it is desirable to do this to explore the connectors on the computer. Usually everything is taken to the back panel of the system unit. I have a video built into the processor, so the video outputs are on the motherboard.
You may have a discrete video card. In this case, the video outputs are a little away
I will give another ass of the system unit with the DisplayPort connector
In the above pictures, you can observe all the most common connectors for connecting monitors.
Now we will explore the latter for video inputs. For example, the Samsung S27C570H LED monitor
There are not many connectors. digital HDMI and analog VGA which is better not to use.
Preparation for launching a portable computer
If you bought a laptop or netbook, then the preparation procedure before the first launch will take less than a minute. On some models it may be necessary to connect the battery. When the battery is in place, open the lid and press the power button. If the battery is not charged, you will need to connect an alternating current adapter that comes with the laptop. You can continue to work during charging.
If peripheral devices are required to the laptop, you can familiarize yourself with the instructions below, for desktop and portable computers, as a rule, the same types of connections are used.
Preparation for launching a desktop computer
Unpack the monitor, system unit, keyboard and other components of the computer out of the box. Remove all transport, plastic coatings or protective film. Install the monitor and the system unit, on the workplace.
Installation recommendations: Place the system unit so that there are enough space for air circulation, in order to avoid overheating. It is better to place the monitor so that the light source is located to the left of the monitor, in order to avoid glare.
Take a cable for connecting a monitor. There are always two cables in the monitor supply kit, one for connecting to the mains, the other for connecting to a computer (system unit). Depending on the monitor model, the kit may be VGA, DVI or HDMI cable. Vga cable often have blue on the chips of the connectors, so that they are easier to identify. If you bought a monoblock, you can go to step 4.
(VGA Cable) (DVI cable) (HDMI cable) (HDMI-DVI cable)
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Connect one end of the cable to the monitor, you will not be mistaken with the choice of the port, and the other end to the same port, on the back panel of the system unit. Be careful and careful, the connectors and nests of the ports have a geometric shape, when you connect the effort correctly, it is not required. If your cable with screws, tighten them slightly to fix the contact.
Tip: if the cable does not “go”, do not shove it, or you can damage the connectors. Make sure the cable connector is suitable for the connector on the computer, and then connect it.
Take the keyboard and determine which connector it connects to the computer. It can be a USB (a rectangular connector of white or black) or PS/2 (a round purple connector).
If you use a USB separation, connect it to any of the USB ports on the rear panel of the computer. If the PS/2 connector is used, connect it to the violet round port on the rear panel of the computer.
Take the mouse and determine which connector it connects to the computer. It can be a USB (a rectangular connector of white or black) or PS/2 (Round green connector). If your mouse has a USB part, connect it to any of the free USB ports on the rear panel of the computer. If the PS/2 connector is used, connect it to the green round port on the rear panel of the computer.
If your keyboard has a USB port, you can connect a mouse, in the keyboard instead of a direct connection to a computer. Or you can connect a USB flashlight to this port for keyboard and desktop backlighting. As well as the presence of a USB port is convenient when connecting a “flash drive”, you do not need to look for a connector on a computer, everything is at hand.
If you have a wireless mouse or keyboard, you may need to connect a Bluetooth adapter (USB adapter), it comes with a wireless device.
If you have speakers or headphones, you can connect them to a computer in an audio port (on the front or rear panel of the system unit). These ports have different colors, as well as plug plugs. Columns or headphones connect to the green port, the microphone connects to the pink (red) port. By the color of the plug you will not be mistaken. The blue port is used with other types of devices.
Some columns, headphones and microphones have USB connectors instead of a conventional audio unit. They can be connected to any USB port. In addition, some monitors have built.in speakers and a microphone, they will also need to be connected to the system unit. For this, the same color connectors are used.
Take two cables supplied with a computer and monitor. Connect the first power cable to the nest on the rear panel of the system unit, then in the network filter. Then, using another cable, connect the monitor to the network filter.
Finally, connect the network filter to the outlet. You may also need to turn on the network filter on it has a power switch.
Step 7 and 8 describes the connection diagram to the power supply this circuit can be used temporarily, since in our power supply there are frequent voltage surges, and there are sudden shutdowns. And such jumps and disconnects adversely affect computer equipment and can lead to its breakdown.
And now literally in a nutshell we will dwell on connecting peripheral devices to a computer.
Connecting a personal computer to a power grid
After buying a computer, at home you will need to connect all devices for connecting a personal computer to the mains.
There are two main circuits for connecting a desktop computer to the mains. Both schemes provide the correct work of a smart assistant. But the scheme requires the purchase of additional equipment (UPS source of uninterrupted power). It is worth paying attention to this and not spare money to purchase this equipment. I recommend the second connection scheme, this will help protect the computer from failures and breakdowns.
Scheme 2. connection through UPS
This scheme uses source of uninterrupted power (UPS or UPS). This scheme is called “through UPS”. And is considered the most preferable when connecting PC to the mains. The main purpose of the UPS is insurance in case of sudden disconnection of electricity. With this connection scheme, in the case of turning off electricity, it will be possible to correctly complete the work with programs and turn off the computer, as the power in this case will come from UPS.
According to this scheme, the monitor and the system unit are connected to the UPS, and it is already to the network. For this connection, special cords for connecting devices are used, which have Mom-Dad connectors.