How to disassemble the charger Xiaomi: detailed instructions with photos and nuances

Why You Might Need to Disassemble Xiaomi Charging and When It’s Dangerous

Xiaomi chargers are famous for their reliability, but even they are not immune to breakdowns, and most often users face such problems: the device does not show signs of life, warms to critical temperatures, or USB-The connector is shattered, 80 percent of the time it's the fault of broken contacts, bloated capacitors, or mechanical damage to the body, but before you grab the screwdriver, you need to assess the risks.

Disassembling a charger is always a trade-off between cost and safety, not only because of the loss of warranty (if it still works), but also because of the risk of short circuits or electric shocks, such as those with Quick Charge. 3.0/4.0 The voltage at the outlet can reach 20V, And after disassembly, you can't get the body back without a gap, and it affects heat sinking and durability.

If you do decide to disassemble, remember: Xiaomi uses different types of cases and mounts depending on the model. For example, the charging series Mi Charge Turbo have a dual-part body with latches, and budget models (for example, the charging series Mi Charge Turbo have a dual-part case with latches, and budget models (for example, the model, MDY-12-EP) We're going to break down the universal methods, but in 2026, the company started using ultrasonic welding in some models, which is almost impossible to disassemble without damage.

What tools will be needed: minimum and extended set

Most Xiaomi chargers will have a minimal set of tools to disassemble, but if you plan to not only diagnose but repair, you will have to stock up on additional devices.

• 🔧 Plastic mediator or guitar mediator - for careful disengagement of the body without scratches.
• 🔨 Cross screwdriver size 1.5-2 mm (for screws in models with a collapsible body, for example, Mi). 65W GaN Charger).
• 🧲 Magnetic screwdriver or tweezers - so as not to lose small screws and springs.
• 🔥 Dryer or thermo-air station - for softening the glue in glued models (temperature not higher than 100)°C).
• 📏 Plastic scraper or credit card – for putting the lid on.
• 🔍 loope USB-microscope - to inspect the board for microcracks.

If you plan to solder or replace items, add to the list:

• 🔥 Temperature adjustable soldering iron (maximum 350)°C for SMD-component).
• 🧪 Flux and solder (better to use lead-free for safety).
• 🧲 Antistatic bracelet – so as not to damage sensitive chips with static electricity.
• 📊 Multimeter – to check the voltage at the output and the integrity of the circuits.

Important: Do not use metal tools to smear the case - they leave scratches and can close contacts on the board. Also avoid too much heat: overheating can damage the capacitors or transformer, which will make charging completely inoperable.

Preparation for disassembly: how not to damage the charging before the start

First rule: disconnect the charger from the grid at least 30 minutes before disassembly. The capacitors in the power circuit can store charge, and accidental circuiting will cause an electric shock or failure of components. USB-C, Check if there is moisture inside - this is a common cause of corrosion of contacts.

Next, look at the body for hidden screws or latches. 33W Fast Charger screws can be hidden under stickers or rubber legs.Attempt to peel off any stickers gently - sometimes they hide screws or warranty void seals. If the sticker breaks, it does not always mean the loss of warranty (in Russia, since 2020, the manufacturer cannot refuse warranty only because of a damaged seal), but it is better to act carefully.

Disconnect charging from the network for at least 30 minutes|

Check the case for screws under the stickers|

Prepare the workplace (lighting, antistatic mat)|

Take a photo of the body from all sides for reverse assembly-->

If the body is glued, try to gently run the plastic mediator along the seam, slightly heating the hair dryer. Do not use solvents (acetone, alcohol) - they can damage the plastic and penetrate into the interior, causing corrosion. For models with ultrasonic welding (for example, some Redmi charging 2023-2026), disassembly without damage is almost impossible - in this case, it is better to contact the service.

⚠️ Warning: If the charger smells like a burn or if there are traces of melting, do not disassemble it yourself. This is a sign of serious damage to the internal chains, and an attempt to repair it can lead to a fire.

Step-by-step dismantling: from the body to the board

The process of disassembly depends on the type of body, and we'll look at two of the most common options: collapsible (with screws) and glued. Let's start with the first one, because it's easier and safer.

Option 1: Charging with screw fastening (e.g. Mi) 65W GaN Charger)

1. Turn the charger over and find the screws, usually 3-4 screws, hidden under rubber legs or stickers, and use a cross screwdriver of the right size.
2. After you unscrew the screws, gently apply the top cover to a plastic mediator. Start at the corner where there are no connectors.
3. If the lid doesn't lend itself, check if there are any hidden latches. USB-port.
4. Disconnect the board from the case. It's usually mounted on a guide or an extra latch.

Option 2: Glued housing (for example, standard charging) 5V/2A)

1. Heat the body with a hair dryer around the perimeter of the seam (temperature 80-100)°C, no higher!) Keep the hair dryer at a distance of 5-10 cm to avoid melting the plastic.
2. Insert a plastic mediator into the seam and gently lead along the body, gradually dissociating the halves. Don't put too much effort into it, it can break the latches.
3. If the glue is too strong, repeat the heat. Avoid using a knife or metal tools!
4. Once the hull is disconnected, pull the board out by pulling it around the edges. Be careful with the wires going to the edges. USB-port.

Inside, you'll see a board with components: transformer, capacitors, control chip and fuse. In Quick Charge models, there may be an additional voltage controller. Don't touch the circuit boards with your bare hands, static electricity can damage them.

Diagnosis of malfunctions: what to look for on the board

After dismantling, carefully examine the board. The most frequent malfunctions and their signs:

• 🔥 Bloated capacitors -- the top of the bulging or brown coated capacitors -- are one of the most common causes of failing charging.
• ⚡ Darkened or burned areas are a sign of short circuit, often near a transformer or power transistor.
• 🧲 Folded or oxidized contacts - especially in soldering areas USB-Check the integrity of the tracks with a magnifying glass.
• 🔋 Electrolyte streams are white or green plaque around capacitors, which means they need to be replaced.
• 🔌 Damaged tracks – often found after falls or mechanical stress.

For more accurate diagnosis, use a multimeter:

1. Check the resistance between plus and minus contacts USB-If you're charging properly, it should be between 200 and 500 Ohms (depending on the model), if you're running close to zero, you're short, if you're running infinity, you're breaking.
2. Measure the voltage at the output (between the +5V and GND). In chargers with Quick Charge voltage can vary from 5V before 20V.
3. Check the safety lock (usually located near the entrance) 220V). If it burns out, it must be replaced with a similar one at par.

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If you are not sure about your soldering skills, take a photo of the board on both sides before replacing the capacitors or transistors, which will help you to position the new components correctly, especially if they have polarity (for example, electrolytic capacitors).

Pay special attention USB-In charging Xiaomi often uses the port. USB-C, If the contacts inside the port are bent or oxidized, they can be gently bent with tweezers and cleaned with alcohol, but if the port is completely torn from the board, it will have to be soldered or replaced.

⚠️ Warning: Do not try to turn on charging if the board shows signs of moisture or corrosion. First dry it in rice or silica gel for at least 24 hours, then clean the contacts with alcohol.

Typical breakdowns and how to fix them

Let's look at some of the most common problems and how to fix them, and remember, if you don't have any experience with electronics, you should go to a specialist.

No charge (no indication)

Reasons:

• The safety lock is burned (most often) 250V/2A or 250V/3A).
• Break in the power chain (check the transformer soldering).
• The control chip has failed (for example, CY77152 In the models of Quick Charge).

Solution: Replace the fuse with a similar one, and if there's a problem in the chip, you'll have to solder it out and install a new one, which is difficult without experience.

2.The charge warms but does not charge

Reasons:

• Bloated capacitors at the outlet (usually) 1000µF/16V or 470µF/25V).
• Short circuit in USB-port.
• The transformer is defective (check the resistance of the windings with a multimeter).

Solution: Replace the capacitors, clean USB-If the transformer is faulty, the charging is easier to replace, and repairing it is not economically feasible.

3 Charging is working, but slowly

Reasons:

• Oxidated contacts in USB-port.
• Failed fast charging controller (e.g, IP2332 Mi models 33W).
• The feedback circuit is damaged (check the resistors near the USB-port).

Solution: Clear the contacts, check the integrity of the tracks, and if the problem is in the controller, it can be replaced, but that requires precise soldering.

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In 90% of cases, slow charging is associated with problems in the USB-Before a complex repair, always check these elements.

4. Charging sparkles or smokes

This is a critical malfunction, immediately disconnect it from the network.

• Short circuit on the board.
• A diode bridge or power transistor is broken.
• The transformer insulation is damaged.

Solution: It's dangerous to repair a charger like this, because you're at high risk of fire, and you'd better dispose of it and buy a new one.

Remove the Remove from Repair: How to Avoid Errors

Collecting the charge back is often harder than disassembling, and here are the key points to look out for:

1. Check the location of all the components. Compare it to the photos taken before disassembly. Watch the polarity of the capacitors and diodes especially closely.
2. Make sure all wires are connected. Some Xiaomi models have additional wires for display or a thermal sensor.
3. Stick the board in the case. It shouldn't hang around, which can cause the contacts to break when they fall.
4. Check the gaps. If the case does not close tightly, it will worsen the heat sink and can lead to overheating.

For glued housings, use heat glue or bilateral tape 3M. Don't use superglue or epoxy, because it can leak in and damage the board, and if the case is damaged in disassembly, it can be fastened with plastic screeds or tape (temporary solution).

After assembly, connect the charger to the network and check:

• 🔌 The presence of voltage at the output (multimeter).
• 🌡️ Temperature of the shell (must not exceed 50)°C in normal operation).
• 📱 The speed of charging the phone (must correspond to the stated).

⚠️ Warning: If the charger starts to buzz or vibrate after assembly, immediately turn it off, which is a sign of unstable transformer operation, which can lead to a fire.

FAQ: Frequent questions about the dismantling of charges Xiaomi