How to change the charging connector on Xiaomi Redmi Note 5: a detailed guide with photos and nuances

Xiaomi Redmi Note 5 is one of the most popular smartphones in the budget segment, but even it is not immune to breakdowns. Most often owners face the problem of a faulty USB Type-C connector (or Micro-USB, depending on the modification): the phone stops charging, the cable “falls out” at the slightest movement, or the inscription “Charging is slow” appears. If you notice these symptoms, do not rush to carry the device to the service – you can replace the connector yourself, saving up to 2000 rubles.

In this article, we will take you through the whole process from A to Z, from fault diagnosis to final testing. You will learn what tools will be required, how to properly disassemble the Redmi Note 5 without damage, and what hidden pitfalls await beginners when soldering a new connector.

Before you start, honestly evaluate your skills: if you have never held a soldering iron or dismantled smartphones, it is better to practice on an old device or consult a master. However, if you are willing to take risks, go ahead! With the right approach, even a beginner can cope in 1-1.5 hours.

1. Diagnosis: how do you make sure that the connector is the problem?

Before disassembling the phone, make sure that the connector is to blame, not the cable, power supply or charging controller. Here are 4 tests to help rule out other malfunctions:

• 🔌 Check cable and power supply: try charging your phone with another cable and charger (preferably original from Xiaomi). If charging started, accessory issues are a problem.
• 🔍 Visual inspection of the connector: light a flashlight inside the nest, if you see bent contacts, oxidation or debris, the connector definitely needs to be replaced.
• 📱 Test on another device: connect your cable to another phone, and if it's charging normally, the problem is the Redmi Note 5 connector.
• 🔧 Software settings check: go to Settings → Battery → Battery settings and turn off the option "Optimize Charging." Sometimes it blocks fast charging.

If after all the checks, the phone still doesn't charge or the charging stops, start replacing the connector. But remember, in 10 percent of cases, the problem is the power controller on the motherboard, which requires professional equipment and costs more than repairing the connector.

⚠️ Warning: If the phone doesn't respond to the cable connection at all (there's not even a vibration or a connection sound), the fault may be due to the detachment of the contacts on the board, in which case self-repair can cause the device to fail completely.

2.Tools and materials: what will be needed to replace

To replace the charging connector on the Xiaomi Redmi Note 5, you need a specialized set of tools. Don't try to do anything at hand, it will damage the case or the board. Here's the full list:

When choosing a new connector, pay attention to its type: Xiaomi Redmi Note 5 was released in two versions - with Micro-USB (Whyred models) and USB Type-C (Vince models). The original connectors are marked with the code XM-12345 (check with the seller).

⚠️ Warning: Don't use cheap Chinese connectors without reviews! They often have poor-quality contacts that oxidize quickly. Better to overpay 100-200 rubles for the original or proven analogue (for example, from Hynet or Salcomp).

Disassembly Xiaomi Redmi Note 5: step-by-step instructions

The Redmi Note 5 takes care to disassemble, with the body attached to latches and glue, and the plumes are very fragile. Follow the instructions in strict order to avoid damaging the flexible cables:

1. Turn off the phone and remove the tray for the SIM- card. Then heat the back cover with a hair dryer (60-70°C) for 2-3 minutes to soften the adhesive.
2. Insert a plastic blade into the gap between the body and the screen (start at the bottom corner) and gently tuck the lid. Move around the perimeter, gradually detaching the latches.
3. When you remove the lid, turn off the battery -- you can use a plastic blade to slap the battery plume -- never use the battery when it's connected -- and this can lead to short circuits.
4. Unscrew 8 screws (Phillips #00 type) that attach the metal plate to the motherboard. Remove the plate and put it aside.
5. Carefully disconnect the plumes: the display, the cameras, the power buttons and the charging sockets. They are attached to the latches — lift them up with a flat screwdriver.

Now you have access to the motherboard, and the charging connector is located at the bottom of the board (near the antenna contacts), and before you start soldering, take a picture of all the plumes, which will help you put the phone back together properly.

4. Removal of old connector: soldering and cleaning of contacts

The most important step is to remove the old connector, and the important thing is not to overheat the motherboard, or the paths will detach or nearby chips will be damaged.

1. Put the flux on the contacts on both sides of the board, which will help the solder melt evenly.
2. Heat one of the contacts with a soldering iron or a dryer (300-350°C), then gently tweez the connector, repeat the procedure for each contact until the nest is completely disconnected.
3. Once the connector is removed, clean the contact areas on the board of solder residues. Use a soldering braid or a wooden toothpick soaked in alcohol.
4. Check the integrity of the tracks under the magnifying glass. If damage is noticeable (for example, detachment of copper contacts), repair will be complicated - you will need to restore the tracks with a wire.

Notice the two pairs of contacts on the sides of the connector, which are responsible for data transfer (D+ and D-), which are easily damaged if soldered carelessly, and if these contacts break off, the phone will no longer recognize the connection to the PC.

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If the solder doesn't melt when heated, increase the soldering iron temperature to 380°C or add fresh flux. The old flux loses activity and does not contribute to soldering.

5. Installation of a new connector and assembly of the phone

Now we're going to install a new connector, and the key is the right positioning and the right soldering.

1. Place the new connector on the contact plates of the board, make sure it is flat and all legs match the holes.
2. Secure the connector with paint tape so that it does not move during soldering.
3. Apply flux to each contact and solder them in turn, starting with the extreme ones. Use the minimum amount of solder - the surplus can close the neighboring contacts.
4. After soldering, clean the board with alcohol to remove the residues of the flux (it can cause corrosion).
5. Check with a multimeter that there is no short circuit between the neighboring contacts, and if the resistance is going to zero, there is a short circuit somewhere, you need to re-sweeten.

After successful soldering, collect the phone in reverse order:

1. Connect all the plumes (start with the battery).
2. Set a metal plate and twist the screws.
3. Stick the back cover to double-sided scotch (the original glue can be bought separately).
4. Turn on your phone and check the charger.

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If the phone doesn't turn on after assembly, check the battery plume and power button connection. In 90% of cases, the problem is poor contact, not soldering.

6. Testing and possible problems after replacement

After replacing the connector, you need to check 4 key functions:

• ⚡ Charging: connect the original cable. The phone should show "Fast Charging" (if supported) and charge consistently.
• 📎 Data transfer: connect the phone to the PC. The computer must recognize the device and suggest file transfer modes.
• 🔊 Headphone sound (if the connector is combined): insert the headphones and check for music playback.
• 📶 Network signal: Sometimes when you disassemble, you'll have an antenna plume that's going off, and you'll lose the network. Check the signal level.

If something doesn’t work, here are the possible causes and solutions:

⚠️ Warning: If the phone starts to reboot or shut down arbitrarily after you replace the connector, immediately turn it off from charging! This is a sign of a short circuit on the board that could cause the battery to catch fire.

7. Alternative solutions: if the replacement did not help

In rare cases, changing the connector doesn't solve the problem, which means that the fault lies deeper, like in the power controller (PMIC chip) or in the battery itself.

• 🔋 Battery check: If the battery is swelling or its capacity has dropped below 60%, it can block charging. Replace the battery (cost 800-1500 ₽).
• 🔧 Diagnostics of the power controller: this requires a multimeter and a circuit board. If there is no voltage at the output of PMIC, the chip will have to be soldered (in service, it costs 2000-4000 ₽).
• 📲 Phone firmware: Sometimes firmware failures block charging. Try resetting to factory settings or reflashing your phone through Fastboot.
• ⚡ Wireless charging: If the connector is not repairable at all, you can use an adapter for wireless charging (cost: 300-600 ₽).

If you're not sure about your abilities, you should contact the service, for example, replacing the power controller requires infrared soldering (BGA- station), which is difficult to conduct at home.

FAQ: Frequent questions about replacing the charging connector