How to disassemble the power supply from the Xiaomi phone: detailed instructions with photos and tips

The power supply from Xiaomi is a compact but complex device that can eventually fail: stop charging, warming, or making extraneous sounds. You can disassemble it yourself to diagnose, repair, or replace components, but the process requires accuracy and knowledge of the basics of electronics. Unlike batteries or phone cases, where there are enough screwdrivers, you need special tools and an understanding of the internal circuitry.

In this article, we will discuss in detail how to open the Xiaomi power supply (on the example of popular models Redmi, Mi and POCO), what tools you will need, and also warn against typical errors that can lead to short circuit or breakage of the device. If you have never dealt with soldering or chips, it is better to entrust the repair to a specialist - but for experienced users, our guide will be a useful guide.

What power supplies Xiaomi can disassemble independently

Not all Xiaomi chargers are disassemblable at home, and here are the key criteria by which to evaluate the possibility of opening:

• 🔌 Type of case: Blocks with adhesive connection (for example, Mi Charge Turbo) 30W) It is more difficult to disassemble than with screw mounts (old Redmi models). 5V/2A).
• 🔧 Power: The higher the power (e.g., power, 67W or 120W), the more densely packed components and thinner tracks on the board - the risk of damage is higher.
• 📅 Year of release: Modern blocks (2020-2026) often have a sealed case with ultra-thin seams, while models until 2018 are easier to understand.
• 🔍 Availability of warranty: If the device is warranty, the autopsy cancels it - it is better to contact the service center.

Among the most "repairable" models are chargers from Redmi Note 4/5 (5V/2A), Mi 9/10 (18W) and POCO F1 (Quick Charge 3.0). But power supplies with support for GaN technology (for example, Xiaomi GaN Charger 65W) are not recommended to disassemble - their body is often soldered with ultrasound, and the board is multilayered.

Preparation: security tools and measures

Before disassembling, assemble the necessary set of tools, without which you risk damaging the body or internal components:

• 🔨 Plastic mediators (or guitar mediators) – to separate adhesive sutures.
• ⚒️ Thin screwdriver (cross or flat, depending on the screws).
• 🔥 Building hair dryer (for softening the glue, if the body is glued together).
• 🧲 Magnetic mat or screw container – to avoid losing small details.
• 🔍 Loop or microscope (to inspect the board for microcracks).
• 🧤 Rubber gloves and dielectric mat – to protect against static electricity.

⚠️ Warning: Even a power supply disconnected from the grid can store charge in the capacitors. Before work, be sure to discharge them by closing the terminals with a screwdriver with an insulated handle (hold it by the plastic part!).

Also, prepare the workplace: it should be well lit, without dust or moisture. Use an antistatic bracelet if you work with sensitive chips. If you plan to solder, stock up on solder, flux and soldering iron with a thin sting (power 20-30 watts).

I've got an antistatic bracelet.|Checked for no moisture on the desk|Prepared the screw container|Discharged the capacitors (closed the conclusions)|Wearing protective glasses (when working with a hair dryer)-->

Step-by-step: how to disassemble the power supply Xiaomi

Consider the process on the example of the typical power supply Xiaomi Redmi 5V/2A (model MDY-08-EM).

Step 1: Removal of the upper cover

1. Place the power supply with a fork down on a soft surface (such as a rubber mat) so as not to scratch the body.

2. Carefully examine the seam between the top and bottom of the body. If you see screws, unscrew them with a screwdriver. If the seam is flat (the body is glued), use a hairdryer:

Heat the seam with a hair dryer at a temperature of 80-100 ° C for 1-2 minutes, then gently apply the cover with a plastic mediator.

3. Once the lid is removed, you'll see the board pressed against the bottom of the case. Don't pull it by force, first disconnect all the connectors (if any).

Step 2: Extracting the fee

1. Turn away the screws that attach the board to the body (usually 2-4 pieces).

2. Carefully raise the board, holding it by the edges. Notice the heat paste, it can glue the radiator to the chip. If the paste is dry, it will need to be replaced when assembled.

3. Check the charge for bloated capacitors, blackened resistors or burnt tracks. These defects are often the cause of malfunction.

Step 3: Diagnostics of components

With the help of a multimeter, check the key elements:

• 🔋 Capacitors: Measure the capacity (should match the face value on the case). Bloated capacitors must be replaced.
• 🔄 Diodes and transistors: Call in diode (anode) mode → The cathode should show 0.5-0.7V, in the opposite direction - infinity).
• 🔥 Resistors: Make sure their resistance is consistent with the labeling (e.g, 103 = 10 kom).

⚠️ Attention: If you find microcracks on the board tracks, do not try to seal them without experience - this can lead to a short circuit.

Typical malfunctions of Xiaomi power supplies and their elimination

The table below shows the most common breakdowns and repairs. Please note that some faults require replacement of components that can be ordered from AliExpress or radio stores.

If you find a burnt element but are not sure of its value, use labeling services such as SMD-Code or AliExpress Datasheet Catalog. For example, if a resistor says 472, its resistance is 4.7 kΩ.

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Before soldering new components, be sure to clear the board of the old solder with a braid to remove solder or suction, which will prevent short circuit due to excessive soldering.

What to do if the power supply is not understood

Some Xiaomi models (especially those with GaN technology or ultra-compact) have a non-shatterable body.

• 🔧 Try alternative opening methods: Heat the body with a hair dryer to 120°C and try to separate it with a knife (risk of damage is high!).Use an ultrasonic bath (if the body is glued with ultrasonic welding).
• 🔄 Buy a similar power supply for donor parts (for example, on Avito or AliExpress).
• 🛠️ Contact the service center if the block for warranties or its repair requires special equipment.

If you do decide to open a non-collectible unit, be prepared for the fact that after repair it will be difficult to assemble it back without any trace of interference. In such cases, it is often easier to buy a new charger - their price rarely exceeds 500-1000 rubles.

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GaN power supplies (Xiaomi 65W/120W) are virtually non-repairable at home due to multi-layer boards and microscopic components, requiring professional equipment (microscope, hot-air soldering station).

Assembly of the power supply after repair

After the fault is eliminated, assemble the block in reverse order, taking into account the following nuances:

1. 🧴 Apply the new thermopaste to the radiator (if any) and chip. Use a high-conductivity thermopaste (e.g. Arctic). MX-4).
2. 🔩 Twisting the screws cross-cross to evenly distribute the pressure on the board.
3. 🔌 Check polarity when connecting connectors (if they have been disconnected).
4. 🔥 Check the block for short circuit with a multimeter before first switching on.

After assembly, connect the unit to the network without load (not connecting the phone) and check:

• Is the body heated (should be slightly warm, but not hot)
• Are there any extraneous sounds (creaming, squeaking).
• Does the output voltage correspond to the declared (measure with a multimeter).

⚠️ Warning: If the block sparkles, smokes or smells of burning after assembly, immediately disconnect it from the network.

FAQ: Frequent questions about dismantling power supplies Xiaomi