Xiaomi chargers are known for their quality and availability, but even they eventually fail. If your RAM stops working, warms up or does not give out the declared power, do not rush to throw it away - in 60% of cases, the problem is solved by cleaning contacts or replacing capacitors. You can disassemble Xiaomi charging yourself, but you need to know its internal structure and observe safety.
In this article, we will discuss in detail the process of disassembling Xiaomi chargers of different capacities (from standard ones). 18W fast-moving 120W), We'll show you what tools you need, and we'll warn you against common mistakes, and we'll also tell you how to diagnose malfunctions and what to do if you don't have any signs of life on the charger. USB-C β Their design is different from the classic chargers with Micro-USB.
What Xiaomi chargers can be disassembled independently
Not all Xiaomi charges are disassemblable at home, for example, the ultra-compact Mi Compact (18W) series often have a sealed body, while the more powerful adapters (33W, 67W, 120W) are usually assembled on screws or latches.
- π Xiaomi Mi Charge 18W (MDY-08-EM) β Classic charging with Micro-USB, disassembled by a screwdriver.
- β‘ Xiaomi Mi Charge Turbo 30W/33W (MDY-11-EP/MDY-12-EZ) β screws under the cross screwdriver, a body of two halves.
- π Xiaomi Mi Charge 67W (AD65) β latch + 1 screw under the pentagon (star).
- β‘β‘ Xiaomi HyperCharge 120W (GA120EM) β complex design requires experience.
If your model is not included in the list, check its labeling (usually marked on the case), Charges marked Mi Compact or Ultra-Compact are often indissoluble, and it is worth considering that new models (2023-2026) may have improved protection against moisture, which makes it difficult to disassemble.
Disassembly tools: what you will need
For a careful disassembly of the Xiaomi charger, prepare the following set of tools:
- π§ Screwdrivers: Cross (PH0 or PH1) β for most screws. Flat (1.5β2 - for hull smearing. - Pentagon (Torx Security) T5/T6) β model 67W higher.
- 𧲠Magnetic mat or container β to avoid losing small details.
- π loope USB-microscope - to inspect the board for microcracks.
- 𧴠Isopropyl alcohol (90%+) β clean-up.
- π₯ Dryer or soldering station - if you need soldering elements.
For models with adhesive joint (such as some versions of the Mi Charge 33W), you may need a plastic mediator or guitar plectre to gently separate the halves of the body.
β οΈ Warning: If youβve never soldered or worked with electronics, disassembling Xiaomiβs charging can be dangerous. Capacitors inside even a disconnected device can store a charge of up to 300 volts β enough for a serious electric shock.
Step-by-step: how to disassemble Xiaomi charging
Consider the universal disassembly algorithm on the example of the popular model Xiaomi Mi Charge 33W (MDY-11-EP). For other charges, the steps may differ slightly.
βοΈ Preparation for disassembly
Step 1: Removal of the upper cover
Turn the plug charger down. Most models have screws hidden under a certification sticker or rubber legs. Carefully tuck the sticker in with a flat screwdriver and remove it. Under it, you'll see 2-4 screws:
- π© MDY-08-EM (18W) β 2 screws under the cross screwdriver.
- π© MDY-11-EP (33W) β 3 screws (2 crosses) + 1 under the pentagon).
- π© AD65 (67W) β 1 screw under the pentagon + latch.
Unscrew all the screws and put them aside. If the case does not detach, gently walk the plastic mediator along the seam, most likely, the halves are held on the latches.
Step 2: Extracting the fee
When you take the lid off, you'll see a board attached to the bottom of the case, which is usually fixed:
- πΉ Then, put them in the snare (smoothly).
- πΉ Glue (heat hair dryer to 60)Β°C to soften).
- πΉ Additional screws (check the board angles).
Don't charge for the wires - they can break away from rations! If the charging has a removable cable (like the Xiaomi 67W with USB-C), first disconnect the connector from the board.
Step 3: Diagnostics of malfunctions
Now that the fee is in front of you, check it out for:
- π₯ Bloated capacitors (frequent cause of unstable operation).
- π₯ Burned tracks or resistors (dark spots).
- π³οΈ Microcracks (especially around the USB-plug).
- π§Ή Dust or oxidation on contacts.
How do you check with a multimeter?
Typical malfunctions and ways to eliminate them
In most cases, Xiaomi charging breaks due to overheating, voltage surges or mechanical damage, and here is a table of the most common problems and methods of repairing them.
| Symptoms. | Probable cause | Renovation method |
|---|---|---|
| Charging is not turned on, the indicator does not burn. | Breakdown of the diode bridge or fuse | Replacement of burnt elements (fuse F1, diodes D1-D4) |
| It warms but does not charge the device. | Controller malfunction (e.g. SC89890) | Smearing or chip replacement |
| Slow charging (does not give the declared power) | Failure of filter capacitors | Replacement of capacitors (usually 1000 ΞΌF Γ 16V) |
| Sparks or cracks when connected to a socket | Poor contact in the network connector | Cleaning contacts with alcohol or replacing the connector |
| It only works in a certain position. | Microcracks on the board or cold soldering | Warming up with a soldering iron or soldering of problem areas |
If you find bloated capacitors, you have to replace them, even if the charging is still working, and over time, the electrolyte from these capacitors leaks out and destroys the circuit board tracks, and you can replace them with similar capacitance and voltage components (like Jamicon or Nichicon).
β οΈ Warning: When you replace capacitors, watch for polarity! "Minus" is marked on the body of the part and on the board. If you confuse the polarity, the capacitor will explode when you turn on.
Features of disassembling Xiaomi charges with USB-C
Models with USB Type-C connector (such as Xiaomi 67W or 120W HyperCharge) have a more complex design, and here are their key features:
- π Double-sided connector USB-C β requires precision in extraction, as the contacts are easy to bend.
- π‘οΈ Additional protection β Epoxy resin is often used to fix critical elements.
- π Two controllers β the main one (for example, Injoinic) IP2336) and auxiliary to power matching.
- π More powerful transistors are often used MOSFET-You're in the hull DFN5x6, Which is hard to sell without hot air.
To disassemble such charges, you may need an infrared soldering station (for example, Quicko T12), since many elements are soldered without legs (BGA-case). If you do not have experience with such equipment, you should contact a service center.
π‘
Before soldering the USB-C connector, take a picture of the location of the contacts. Xiaomi charges often use custom-made slinging (for example, additional resistors to identify the cable).
Cleaning and prevention: how to prolong the life of charging
Even if the charging is working properly, regular cleaning will help to avoid problems in the future.
- π§Ή Dust removal: Use a soft brush or compressed air balloon to clean the vents.Don't blow with your mouth - saliva contains moisture!
- π§ Contact cleaning: Wet the cotton swab in isopropyl alcohol and wipe USB-connector and network contacts. For hard-to-reach places, use a toothpick.
- π₯ Heat conduction check: If the case is heavily heated, apply a thin layer of thermal paste (e.g. Arctic) MX-4) radiator (if any).
- π Load test: Connect the charger to the phone and check the output voltage with a multimeter, 5V/3A, 9V/2A etc.).
If you store your charging in a damp room (like a bathroom), warm it up with a hair dryer at minimum power every six months, which will remove the condensation. Also, avoid twisting the cable near the base, which is the most vulnerable part that often breaks.
π‘
Regular cleaning of contacts and checking the voltage under load can increase the charging life by 30-50%.
When the Disassembly is Inappropriate: Alternative Solutions
Not all Xiaomi charger breakdowns can be fixed at home, and here are the best times to stop repairing:
- π₯ The power part of the board (blackened tracks, melted resistors) burned down.
- π Problems with the network connector (for example, a broken leg) Replacement of the connector requires special equipment.
- π‘οΈ Charging is filled with epoxy resin (often found in models from 2023-2026.
- β‘ Failure of the power controller (e.g, PI These chips are rarely available for sale.
In such cases, it is more rational to buy a new charger. The original Xiaomi adapters can be found on AliExpress or in branded stores (for example, Mi Store). The cost varies from 500 rubles (18W) to 2500 rubles (120W). When buying, check for certificates (for example, CE or RoHS) - counterfeits often do not correspond to the declared power.