Pinout of usb ports and pinout of micro USB: diagram, wire colors. Pinout of USB connectors

It has been developed since 1994, while the development team consisted of engineers from leading companies in the field of IT technologies - Microsoft, Apple, Intel and others. In the process of conducting research, one task was pursued - to find a universal port that could be used for most devices.

Thus, users were provided with a USB connector, which was almost immediately supported by various developers and began to be actively used in a variety of devices, ranging from personal computers to mobile gadgets. However, it so happened that cables with such connectors could not be used everywhere, and by themselves they were different, and therefore some require the wiring of the mini-USB connector in order to make the appropriate adapter.

At the same time, few people know how this procedure should be carried out correctly.

Concepts to know

Wiring the USB connector begins with learning the basic concepts:

VCC - positive potential contact For modern USB cables, the indicator of this contact is +5 Volts, while it is worth noting that in radioelectric circuits this abbreviation fully corresponds to the supply voltage of PNP, as well as NPN transistors.
GND - contact of the negative potential of the power supply. In modern equipment, including also various models of motherboards, this device is connected by a case in order to provide effective protection against static electricity or any external sources of electromagnetic interference.
D- - information contact, which has zero potential, relative to which information is broadcast.
D + - informational contact having a logical unit. This contact is used to broadcast information from the host to the device, or vice versa. At the physical level, this process is the transmission of rectangular pulses with a positive charge, while the pulses have different amplitude and duty cycle.
Male - the plug of this connector, which is often called "male" among modern users who unsolder a USB connector for a mouse and other devices.
Female - The jack where the plug is inserted. The users are called "mom".
RX - information reception.
TX - information transfer.

USB-OTG

OTG is a way to connect two peripherals via a USB cable without the need for a computer. Also, such a pinout of the micro-USB connector is often called USB-host in professional circles. In other words, a flash drive or some kind of hard drive can thus be directly connected to a tablet or mobile phone in the same way as to a full-fledged personal computer.

In addition, mice or keyboards can be connected to gadgets if they support the ability to use them. Often, cameras and other gadgets are connected to printers in this way.

What limitations does it have?

The limitations that such a pinout of the micro-USB connector has are as follows:

For example, if we are talking about connecting a USB flash drive to the phone, then in this case the adapter "USB_AF-USB_AM_micro" is most often used. In this case, the USB stick is inserted into the connector, while the plug is connected to the mobile phone.

Cable feature

The main feature that distinguishes the pinout of the USB connector in the OTG format is that in the plug pin 4 must be closed with pin 5. In the standard data cable, nothing is soldered to this pin at all, but this plug is called USB-BM micro. It is for this reason that you need to get to the fourth contact, and then use a jumper to connect it to the GND wire. After this procedure, the plug will be renamed to USB-AM micro. It is the presence of a jumper between these contacts in the plug that allows the device to determine that it is going to be connected to some kind of peripheral device. In the event that the device does not see this jumper, it will act as a passive device, and any flash drives connected to it will simply be completely ignored.

How are devices identified?

Many people believe that when connected in OTG mode, both devices completely automatically determine which of them will be the host and who will be subordinate. In reality, in this case, only the user determines who exactly will be the master in this case, since a plug equipped with a jumper between 4 and 5 contacts will be plugged into which device, then one of them will be the host.

How to do it?

Through the translucent insulation, you can see several colored wires. You will need to melt the insulation near the black wire, then solder one end of the jumper to the GND pin. On the opposite side, you can see a white wire as well as an unused contact. In this case, we need to melt the insulation near the unused contact, and then solder the other end of the jumper to it.

It should be noted that the wiring diagram for the micro USB connector is much simpler.

The open plug that you equipped with a jumper will need to be insulated, for which a specialized heat shrink tubing is used. After that, you just need to take the "mother" from the extension cord and solder it to our plug color in color. If the cables are shielded, then you will also need to connect the shields, among other things.

Can i charge?

If peripherals are connected to the device via OTG, then in this case it will have to power it, which can significantly reduce the overall operating time of the device from the battery built into it. In this regard, many are wondering whether it is possible to recharge such a device through an external source. This is possible, but this requires support for a special mode in the device, as well as a separate pinout of the USB connector for charging.

In fact, the charging mode is most often provided by modern gadget developers, but not everyone allows such a procedure. At the same time, it should be noted that to switch to this charging mode, a separate wiring diagram for the USB connector must be used, in which the contacts are closed through a separate resistor.

Content:

In every computer and other similar devices, the USB connector is the most popular. With the help of yusb wire, it became possible to connect more than 100 units of serially connected devices. These buses allow you to connect and disconnect any devices, even while a personal computer is running. Almost all devices can be charged through this connector, so there is no need to use additional power supplies. USB pinout by color helps to determine exactly what type of device a particular bus belongs to.

USB device and purpose

The first ports of this type appeared in the nineties of the last century. After a while, these connectors were updated to the USB 2.0 model. The speed of their work has increased more than 40 times. Computers now have a new USB 3.0 interface with speeds 10 times faster than the previous version.

There are other types of connectors of this type, known as micro and mini USB, used in modern phones, smartphones, and tablets. Each bus has its own or pinout. It may be required if you need to make an adapter with your own hands from one type of connector to another. Knowing all the subtleties of the location of the wires, you can even make a charger for a mobile phone. Note, however, that the device may be damaged if connected incorrectly.

The USB 2.0 connector is designed as a flat connector with four pins. Depending on the purpose, it is labeled as AF (BF) and AM (BM), which corresponds to the common name "mom" and "dad". Mini and micro devices have the same markings. They differ from conventional buses by five contacts. The USB 3.0 device outwardly resembles the 2.0 model, except for the internal design, which already has nine pins.

Pinout-wiring of USB 2.0 and 3.0 connectors

The pinouts for the USB 2.0 model are in the following order:

The conductor is red, to which the DC voltage is supplied with a value of + 5V.
White conductor used to transfer information data. It is identified by the “D-” mark.
The conductor is colored green. It also transfers information. It is labeled "D +".
The conductor is black. Zero supply voltage is applied to it. It is called its general wire and is designated by its own label in the form of an inverted T.

The wire layout in the 3.0 is completely different. The first four contacting wires fully match the USB 2.0 connector.

The main difference between USB 3.0 is the following wires:

Conductor # 5 is blue. Information with a negative value is transmitted through it.
Conductor No. 6 is yellow, just like the previous contact, is designed to transmit information that has a positive value.
Conductor # 7 is used as an additional ground.
Conductor # 8 is purple and conductor # 9 is orange. They perform the function of receiving data, respectively, with negative and positive values.

Unsoldering-pinout of micro- and mini-USB connectors

Micro-USB connectors are most commonly used in tablets and smartphones. The pinout of micro usb differs from standard buses in much smaller size and the presence of five pins. They are labeled as micro-AF (BF) and micro-AM (BM), which correspond to "mom" and "dad".

The micro-USB is wired in the following order:

Contact No. 1 is red. Voltage is supplied through it.
Contacts # 2 and # 3 white and green are used for transmission.
The lilac pin No. 4 has a special function in certain bus models.
Black pin No. 5 is a neutral wire.

The pinout of the mini USB connector by color is carried out in the same way as in the micro USB connectors.

USB (Universal Serial Bus) All variety of USB 2.0 connectors is shown in the picture below. The picture is clickable.

To avoid confusion: In all tables, the view of the connector is given from its outer, working side (and not from the mounting side!), Unless otherwise specified. The insulating parts of the connector are marked in light gray, the metal parts are in dark gray, and the cavities of the connector are marked in white.

Well, and a simplified, so to speak, practical scheme:

The name of this or that connector is supplied with letter indices.

Connector type:

A - active, power supply device (computer, host)
B - passive, connected device (printer, scanner)

"Gender" of the connector:

M (male) - plug, "male"
F (female) - socket, "mother"

Connector size:

For example: USB micro-BM-plug (M) for connecting to a passive device (B); micro size.

Pinout of the USB connector (sockets and plugs)

The purpose of the wires in the USB cable is as follows:

Red VBUS (+ 5V, Vcc - Voltage Collector Collector) +5 Volts DC relative to GND. Maximum current - 500 mA
White D- (-Data)
Green D + (+ Data)
Black GND - common wire, "ground", "minus", 0 Volt

The mini and micro connectors contain 5 pins:

Red VBUS
White D-
Green D +
ID - not used in connectors "B"; in connectors "A" shorted to GND to support the "OTG" function
Black GND

Among other things, the cable contains (though not always) a bare Shield wire - a case, a screen, a braid. This wire is not assigned a number.

Good news

On the Internet, a reversible micro-USB plug is announced, which, like USB 3.1 Type-C, does not require a clear orientation of ± 180 ° when connected to a jack.

Pinout of mouse and keyboard cord

Some mice and keyboards may have different colors on the cable. Detailed article on custom colors: "USB custom colors in mouse and keyboard cords"

Also read about connecting mice and keyboards to the PS / 2 port

How to unsolder USB?

Well, with ordinary USB, everything is simple - you take the image of the front of the connector in a mirror image and solder it.

The pinout of the USB mini and USB micro plugs from the mounting side is shown in the picture below. If you are soldering a simple data cable (for connecting a PC and a mobile phone / smartphone / tablet), then do not use the 4th contact. When soldering the OTG cable (for connecting flash drives and other things to a smartphone), connect the 4th pin to the 5th.

Mini and micro connectors contain 5 pins. The fourth contact is not used in type “B” connectors. In connectors of type "A" the fourth contact is closed with GND. And the very contact GND gets the honorable fifth place.

And here is the complete diagram of the USB cable with the screen.

Related materials:

All materials on the topic "USB" All materials on the topic "Charger" All materials on the topic "Computer"

Tags: USB, Cable, Computer, Mobile, Connector, Pinout (Unsoldering)

rones.su

Pinout of USB ports, wiring micro usb, mini connector for charging

Currently, all mobile devices and desktop electrical appliances have data ports in their arsenal. Modern gadgets can not only exchange information via USB or micro-USB, but also charge batteries. In order to carry out a competent pinout of contacts, first you need to study the diagrams and colors of the wiring.

USB cable wire colors

Connector diagram for USB 2.0

On the diagram, you can see several connectors that differ in a certain way. For example, an active (power) device is designated by the letter A, and a passive (connected) device by the letter B. Computers and hosts are active, and printers, scanners and other devices are passive. It is also customary to divide connectors by gender: M (male) or “male” is a plug, and F (female) or “mother” is a connector socket. There are formats in size: mini, micro and unmarked. For example, if you see the designation "USB micro-VM", it means that the plug is designed to connect to a passive device in the micro format.

To pinout the sockets and plugs, you need to know about the purpose of the wires in the USB cable:

the red VBUS ("plus") is a constant voltage of 5 volts relative to GND. The minimum value of the electric current for it is 500 mA;
connect the white wire to the minus (D-);
the green wire is attached to the plus (D +);
black color of the wire means that the voltage in it is 0 Volts, it carries a negative charge and is used for grounding.

In mini and micro formats, the connectors contain five pins: red, black, white and green wires, as well as ID (which is shorted to GND in type A connectors, and is not used at all in connectors B).

Sometimes a bare Shield wire can be found in the USB cable. This wire has no number.

If the table is used in the work, then the connector is shown in it from the outer (working) side. The insulating parts of the connector are light gray, the metal parts are dark gray, and the cavities are white.

In order to carry out the correct USB wiring, you need to mirror the image of the front of the connector.

The mini and micro USB connectors have five pins. Therefore, the fourth contact in type B connectors will not have to be used in operation. This contact in type A connectors is closed with GND, and for GND itself, the fifth is used.

As a result of not tricky manipulations, you can independently make a pinout for USB ports of different formats.

USB wiring version 3.0 features the addition of four colored wires and an additional ground. Due to this, the USB 3.0 cable is noticeably thicker than its younger brother.

Diagrams for connecting USB devices to each other and wiring device plugs:

volt-index.ru

Pinout USB connector: normal, mini, micro

In our age of computer technology, smartphones and gadgets, it is difficult to find such a person who does not know what USB connectors are. Also, almost everyone understands words such as mini- and micro-USB connectors. After all, we use such things almost daily, which is natural. Similar connectors are found on the charger and on all computer peripherals.

But what if the wiring has moved away at the base, and there is no way even to understand what color and on what contact was soldered? This is where knowledge should be applied, and what, now let's try to figure it out.

The pinout of such a plug, or, in other words, the pinout of the USB cable, in its essence, does not carry anything super complicated. Once you figure out the sequence and colors, anyone who can hold a soldering iron can do this job.

But first you need to understand what a USB plug is.

Types of USB plugs

What is a USB connector?

At its core, it is a connector with many possibilities, ranging from USB power to the transfer of complex information data. A similar cable replaced the previously used options for connecting to a computer (PS / 2 ports, etc.). It is used today for all devices connected to a personal computer, be it a mouse, flash drive, printer, camera or modem, joystick or keyboard - USB cables have become truly universal.

There are three types of such connectors:

1.1 - its purpose - outdated already peripheral devices with the ability to transfer information only one and a half megabits per second. Of course, after a slight modification by the manufacturer, the transmission speed rose to 12 Mbit / s, but with higher-speed options, it still could not stand the competition. Still, when Apple already had a connector supporting 400 Mbps. Now such types also exist, but there are very few of them, since faster USB cables, mini USB, and in general, the speed of USB occupies a special place in human life long ago. Everyone is in a hurry somewhere, in a hurry to live, there are people who practically do not sleep, and therefore, the faster the information is downloaded, the more preferable the connector is, right?
2.0. At the end of the last century, the second generation of such connectors was released. Here the manufacturer has already tried - the transmission speed has grown to almost 500 Mbit / s. And it was intended mainly for sophisticated gadgets, such as a digital video camera.
3.0 is really high technology. The limiting data transfer rate of 5 Gbps ensured the demand for this USB connector, which practically nullified the first and second versions. In the third series, the number of wires has been increased to nine versus four. However, the connector itself has not been modified, and therefore you can still use the types of the first and second series with it.

Pinout designations

Considering the pinout diagram, you must understand all the designations that are present on it. Usually indicated:

USB pinout options

Connector type - it can be active (A) and passive (B). Passive is the connection of a printer, scanner, etc. In general, a connector that only works for receiving information. Through active it is possible to receive and transmit data.
The shape of the connector is female for female (F) and male for male (M).
Connector sizes are regular, mini and micro.

For example USB AM, that is, an active USB plug.

The wires should be arranged by color as follows (from left to right):

Red wire - positive, constant voltage 5V. with a maximum current of 500 milliamperes.
White wire - data-
Green wire - data +
Black wire - this wire is common, "ground", "minus". There is no tension on it.

But the mini and micro connectors include 5 wires with the following arrangement:

Red, white and green wires are located similarly to the first option.
ID - this wire in the B connectors is free. In "A" it must be shorted to a black wire.

Pinout of contacts in the "mother" USB 3.0

Sometimes a separate wire without insulation may be present in the connector - this is the so-called "mass", which is soldered to the case.

According to the presented diagrams, the outer side is visible here. In order to solder the plug on your own, you need to take a mirror image of the picture, and as you probably realized, microUSB pinout is not at all more complicated than that of conventional USB connectors.

By the way, if the damaged parts of the cable are supposed to be used only for charging mobile phones, it will be more convenient, after looking at the colors of the wires, to solder only black and red. This connector is quite enough for a phone, it will charge it. What to do with the rest of the wires? You don't need to do anything with them.

domelectrik.ru

Wiring the USB connector. Wiring diagram:

The wiring of the USB connector has been developed since 1994, while the development team consisted of engineers from leading companies in the field of IT technologies - Microsoft, Apple, Intel and others. In the process of conducting research, one task was pursued - to find a universal port that could be used for most devices.

At the same time, few people know how this procedure should be carried out correctly.

Concepts to know

Wiring the USB connector begins with learning the basic concepts:

VCC - contact of the positive potential of the power supply. For modern USB cables, the indicator of this contact is +5 Volts, while it is worth noting that in radioelectric circuits, this abbreviation fully corresponds to the supply voltage of PNP, as well as NPN transistors.
GND - contact of the negative potential of the power supply. In modern equipment, including also various models of motherboards, this device is connected by a case in order to provide effective protection against static electricity or any external sources of electromagnetic interference.
D- - information contact, which has zero potential, relative to which information is broadcast.
D + - informational contact having a logical unit. This contact is used to broadcast information from the host to the device, or vice versa. At the physical level, this process is the transmission of rectangular pulses with a positive charge, while the pulses have different amplitude and duty cycle.
Male - the plug of this connector, which is often called "male" among modern users who unsolder the USB connector for mice and other devices.
Female - The jack where the plug is inserted. The users are called "mom".
RX - information reception.
TX - information transfer.

USB-OTG

In addition, mice or keyboards can be connected to gadgets if they support the ability to use them. Often, cameras and other gadgets are connected to printers in this way.

What limitations does it have?

The limitations that such a pinout of the micro-USB connector has are as follows:

Cable feature

How are devices identified?

How to do it?

It should be noted that the wiring diagram for the micro USB connector is much simpler.

Can i charge?

Micro usb connector pinout- the technological process does not stand still. Modern models of various digital devices are strikingly different from their older counterparts. Changed not only their appearance and internal equipment, but also the ways of connecting to computers and chargers. If even 5-7 years ago, many phones and even cameras did not have such an opportunity. But at the moment, absolutely every digital device can be connected to a personal computer or laptop. A phone, player, smartphone, tablet, camcorder, player or camera are all equipped with connectors that allow you to connect them to other devices.

Micro USB connectors. Types of USB connectors, their features

But, as you can easily see, the connector is not the same. And the cord purchased with the phone for some reason cannot be used in conjunction with your favorite player. As a result, a bunch of cables accumulates, you are constantly confused in them and cannot understand in any way why it was impossible to make one wire suitable for connecting all devices. But, as you know, this does not happen. Although now more or less a standard connector has appeared, at least for smartphones, phones and tablets. And his name is micro-USB. What is this miracle and how does it work, how is it done pinout micro usb connector, we will explain below.

Micro USB connector: what is it?

The two most popular connectors in recent years are mini and micro-USB. Their names speak for themselves. These are smaller and more practical designs that are used on small digital devices to save space and possibly for a sleeker look. For example, a micro-USB connector for a tablet is almost 4 times smaller than a standard USB 2.0, and considering that the device itself is several times smaller than a personal computer or even a laptop, this option is simply ideal. But there are also some nuances here.

For example, you can never make smaller out of more, so micro-USB connectors cannot be replaced even with mini-USB. Although in some cases the reverse process is acceptable. And replacing micro-USB with your own hands is unlikely to end with something good. Painfully, this is a work of jewelry, in addition, you need to know exactly how to do pinout micro usb connector... Besides, under the word “micro” there are several types of connectors at once, and this should be remembered. Especially if you are trying to buy a new wire. Your tablet's micro USB may not be compatible with the connector on the end of the cable that you purchased.

Varieties

Micro USB connectors can be of two completely different types. They have different areas of application and, accordingly, they look different. The first type is called micro-USB 2.0. type B - it is used in devices by default and is an unspoken standard for the latest models of smartphones and tablets, because of this it is very common and almost everyone at home has at least one micro-USB 2.0 cable. type B.

The second type - micro-USB 3.0 - these connectors are not installed on tablets, but they can be found on smartphones and phones of some brands. Most often they are used to equip external hard drives.

Benefits

The main advantages of micro-USB connectors for tablets are the increased density and reliability of the plug fastening. But this fact does not exclude the possibility of malfunctions with these components, especially with inept attempts to repair and pinout the micro usb connector. The most common cause of breakdown is the carelessness of the owners of digital devices themselves. Sudden movements, falling tablets and phones on the floor or even asphalt, especially on the side where the connector itself is located, attempts to fix something with your own hands without the appropriate knowledge are the main reasons why even the most durable parts of USB ports come out out of service. But it happens that this happens due to wear and tear of the device, improper operation or factory defect.

The most common cause of malfunction is either the micro-USB connectors themselves, or adjacent parts connected to them in the circuit. For any experienced craftsman, replacing it is a matter of minutes, but not everyone can cope with this at home. If you are still interested in how you can repair the micro-USB connector yourself and how pinout micro usb connector (or, in other words, wiring). Then you need to understand that this process, although not the longest and most difficult, if you approach it wisely and preliminary reading the relevant information. A few tips will be given below.

Micro USB connector: pinout of micro usb connector

As you know, with ordinary ports and connectors, everything is simple - you just need to take an image of the front part of their connector, but in a mirror image, and solder. With USB mini and micro, things are a little different. Their connectors contain 5 pins, but on type B connectors, pin number 4 is not used, and on type A it is shorted to GND, which takes the fifth place.

Features of micro-USB feet

Since most modern tablets have micro-USB, which serves not only for charging, but also for synchronization, due to the more frequent use of the connector, problems with it arise more often.

So, as mentioned above, a conventional micro-USB connector has five legs. One positive, for five volts, and one negative. They are located on different sides of the connector and, accordingly, suffer less when they are detached from the motherboard. Only one "leg" of the connector, which is most often pulled out of the contact area, is more exposed to wear. It is located closer to the minus "leg". If this contact is damaged, the device cannot be charged. That is, the system can see the power supply, but the charging process will not take place.

The remaining two "legs" are responsible for synchronization, that is, for the ability to upload and download photos, music, etc. They do this simultaneously, so the separation of one will entail the termination of the work of the second.

Knowing the functions of the "legs", you will be able to determine, due to the separation of the contacts of which you started having problems and which of them you will need to solder in order to return your tablet to "operational".

Incorrect pinout of the micro usb connector or its incorrect replacement - consequences

Having incorrectly soldered micro-USB, the owners most often face the following problems:

1. PSU shorts if they are soldered inverted type.
2. The tablet detects the charging cord, but the battery (battery) does not charge.
3. The tablet battery charges perfectly, but it does not sync with your laptop or computer.
4. The tablet works fine, but sometimes it "reminds" that you should take it to the workshop, rather than soldering it yourself (for example, charging does not start immediately after turning on, or sometimes the cord must be pulled out and reinserted several times before charging starts).

The future of micro USB

Since these are some of the most popular ports today, if you learn to change them once and learn how to do pinout micro usb connector, this skill will help you out very often in the future. And let them not be taken for the "gold standard" in the development of phones and other digital devices. And we still have to have a whole collection of wires specially for the Acer laptop, for the phone from Samsung, for the iPad from Apple and the Nikon camera, but the active use of micro-connectors gives hope that soon instead of a "bouquet" we will have one on the shelf micro USB cable suitable for at least 90% of household appliances.

What are the USB connectors and plugs

On the left is Mini USB, on the right is Micro USB.
Mini USB is much thicker, making it impossible to use
it in compact thin devices.
Micro USB is easy to recognize by two notches,
holding the plug firmly when connected.

Three brothers of the same family.
Mini USB and Micro USB are much thinner than usual.
On the other hand, "crumbs" lose
in reliability to an older friend.

Micro USB connectors are built into many modern devices, but there are other types of connectors - Mini USB, which require a separate special cable. Many people have a logical question: why not replace the Mini USB socket with Micro USB.
Is it easy to re-solder a USB socket on your own without a soldering station, and what difficulties can a person without experience in electronics repair have when replacing a USB connector.
Let's consider the process of replacing Mini USB connector with Micro USB in detail!
First of all, you should know that these connectors most often do not have the same pads for soldering to the board, or the step between the pins of the contacts!
If these difficulties do not scare you, and you still decide to replace the Mini USB connector with Micro USB, be sure to take care of isolating all the connector pins!

As for the tools, to replace the USB connector yourself, you will need:
1. High quality low-melting solder and acid-free flux.
2. Desoldering pump, even the simplest one, is not required, but desirable! It will be much faster to solder parts with it!
3. Braid for removing solder.
4. PCB cleaner or regular alcohol. Even if you are using a professional no-clean flux, wiping the board after soldering will not hurt!
5. Heat-resistant Kapton tape.
6. It is very desirable to have a PCB holder of at least the simplest type!
7. Soldering station or soldering iron with thermo-stabilization! Without them, the probability is high:
- part overheating! Overheated PCB tracks usually just flake off!
- its underheating! If the solder is not plastic enough and hardens quickly, you run the risk of tearing off the part along with the PCB contact pads! This is especially true when replacing Micro USB, Mini USB and other similar connectors!

The process of replacing a USB connector consists of several stages:
1. First of all, the device is completely de-energized by disconnecting it from the mains and autonomous power supply (the batteries must be disconnected)!
2. All low-melting parts near the connector are usually protected from melting by gluing with Kapton tape.
3. Acid-free flux is applied to the place where the USB connector is removed.
4. The refractory solder is removed and the low melting point is applied.

The more solder you can apply, the easier it will be to remove the USB connector with a soldering iron.

5. Evenly moving the soldering iron, try to simultaneously warm up all the contact pads of the connector and its conclusions.
6. Carefully remove the connector from the board, making sure that the solder is sufficiently hot. It is better to remove the connector with ceramic tweezers, rather than ordinary metal ones!

7. All contact pads are cleaned of solder so that their surface becomes level!
8. If the Mini USB connector is replaced with Micro USB, and the contact pads do not match, Kapton tape is glued to the board. It is needed to prevent short circuits!

9. It is very important to accurately align the Micro USB socket on the board! Please note that the protruding metal part of Micro USB plugs comes in different lengths!

A socket placed too "deeply" in the Micro USB case will not provide reliable contact with the plug contacts, because its plastic will simply rest against the case! Conversely, a too close soldered connector can easily break from lateral distortion when pulling out the cable!

All connector pins must be carefully tinned and make sure that the solder really penetrates the metal! If this is not done, the connector may simply fall off or shift when inserting / removing the connector!

Having precisely positioned the USB connector, solder its mounting pins.
10. Then solder the power leads and (if necessary) the signal leads.
If the pitch between them does not match, wires are usually used for connection ("hairs" from a thin wire). Note, however, that the supply conductors ("+" and "-") must have a sufficient cross-section!
11. The attachment of the Micro USB connector to the board can be strengthened by soldering an additional bracket made of tinned wire (always hard).

Of course, you need to solder it carefully so as not to melt the connector and not to seal up the holes for fixing the Micro USB plug with solder!
12. After replacing the USB connector, thoroughly rinse the board from the flux and make sure that there are no "snot" (solder particles) on it, which can cause a short circuit! Of course, it is better to "ring" all soldered contacts with a multimeter before assembling the device!