We disassemble Xiaomi charging correctly: from simple adapters to fast charging

Xiaomi chargers are known for their quality, but even they fail over time: they stop keeping contact, warm up or do not give any signs of life. Instead of buying a new charge right away, you can try to fix it — often the problem lies in a broken contact, a fuse or a damaged cable. However, disassembling chargers requires accuracy: fragile chips are hidden inside the compact case, and improper interference can lead to a short circuit or even a fire.

In this article, we will discuss in detail how to safely open Xiaomi charging - from standard adapters to the mobile phone. 5V/2And before the powerful fast charging units on 33Watt, 67Wh- 120You will learn what tools you need, how to avoid typical errors and what to do if the device does not work after dismantling. Particular attention will be paid to models with adhesive body connection - their disassembly requires a specific approach, otherwise you can damage the board.

What Xiaomi Charges Can Be Disassembled By Yourself

Not all Xiaomi chargers are disassemblable at home, and here are the main types to work with:

• 🔌 Standard adapters (5V/1And, 5V/2A) - the easiest to disassemble, usually fastened by latches or screws.
• ⚡ Fast charging (18W, 33W, 67W) – often have adhesive housing, but to disassemble them is real with patience.
• 🔋 Charging with USB-C (Mi Charge Turbo – require caution due to fragile contacts.
• 📱 Wireless charging stations (e.g. Mi Wireless Charging Pad) – dealt with similarly to adapters, but with additional coils inside.

Here is what is not recommended to be understood:

• 🚫 Charges with cast housing (for example, some models of Redmi economy segment) – they cannot be opened without destruction.
• 🚫 Devices with warranty seal - disassembly cancels the warranty.
• 🚫 Charges with visible bloating or melting - high risk of short circuit.

⚠️ Warning: If the charging smells like a burn or is too hot, don't try to disassemble it! This is a sign of a serious malfunction that could lead to fire.

Disassembly tools: what you will need

To carefully disassemble Xiaomi charging, prepare the following set of tools:

If the charging is glued (for example, Mi Charge Turbo models) 30W or Redmi 33W Fast Charge, you can't do without a hair dryer. 60-80°Perimeter C, it'll weaken the glue. Don't overheat, the plastic can deform!

For models with screws (for example, Mi Compact) 18W) The screws are usually hidden under stickers or rubber legs, and you need to carefully apply them with a knife or mediator.

Take a photo of the charging from all sides|Disconnect from the network in at least 1 hour|Prepare the workplace (light, without carpets)|Wear an antistatic bracelet (optional)|Check the availability of all tools-->

Step-by-step: how to disassemble Xiaomi charging

Consider the universal disassembly algorithm on the example of the popular Xiaomi Mi model 18W Fast Charge.For other charges, the steps may be slightly different.

Step 1: Removal of the upper cover

1. Place charging with a fork down on a soft surface (such as a napkin).

2. Put a plastic mediator in the gap between the top and bottom of the housing, carefully swipe it around the perimeter to separate the latches.

3. If the body does not respond, slightly heat it with a hairdryer (do not direct hot air to the fork!).

Step 2: Extracting the fee

1. Once you remove the lid, you'll see a board pressed against the body, which is usually fixed by latches or screws.

2 Unscrew the screws (if any) and tweez the board carefully. Don't pull the wires!

3. disconnect the plumes (if any) - for this, lift the connector lock with tweezers.

Step 3: Inspection and diagnosis

You can now check the fee for the subject:

• 🔥 Blackened or swollen capacitors - a sign of overheating.
• 🔌 Oxidized contacts – often found in cheap charging.
• 🔋 Fired fuses - look like small black boxes with a designation F1 or F2.
• 🕳️ Cracks on the board tracks - can appear after a fall.

If everything is visually fine, use the multimeter to check:

1. Set the resistance check mode (200 ohms).


2. Touch the probes to the input contacts (fork).




3. Normal resistance is 200-500 kOhms. If 0 or 1, the board is faulty.

⚠️ Warning: If there is white powder on the board (glue or flux residues), do not breathe it! it can be harmful to health. Work in a ventilated room or use a mask.

Typical malfunctions and how to fix them

In most cases, Xiaomi charging breaks due to three reasons: mechanical damage, overheating or power surges. Consider the most common breakdowns and how to repair them.

1. Doesn't work. USB-port

Symptoms: Charging is not determined by the device, the cable is not held.

Reasons:

• 🔌 Oxidation of contacts - clean with alcohol and cotton swab.
• 🔧 Shattered connector - solder contacts or replace the port.
• 🔥 Burnt controller – requires replacement of the chip (difficult at home).

2. Charging does not warm, but does not charge

Symptoms: The indicator is on, but the phone is not charging.

Reasons:

• 🔋 Fired fuse - replace with a similar (nominal is indicated on the body).
• 🔌 Chain break - check the multimeter tracks on the board.
• 📉 Faulty voltage controller - will require a soldering iron and a donor fee.

3.The charge is heating up a lot.

Symptoms: the body is hot, the smell of burning, the phone charges slowly.

Reasons:

• 🔥 Bloated capacitors - replace with new ones (with the same nominal value).
• 🔄 Closing in the winding of the transformer - is not subject to repair, only replacement.
• 🔌 Bad contact in the fork - tighten the screws or replace the fork.

If you are not sure about your soldering skills, you should contact the service. Improper repairs can lead to a short circuit or even a fire!

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Before soldering, be sure to remove the remnants of the old solder from the board, use a solder removal braid or a special pump, which will prevent the neighboring contacts from closing.

Features of disassembling charges with adhesive body

Many modern Xiaomi charging (e.g. Mi) 67W Turbo Charge or Redmi 120W HyperCharges have adhesive housing. They require a special approach to disassembling them:

1. Heat. Use a hair dryer or a thermo-air station to soften the glue. Temperature — 70-90°C, time — 3-5 minute.
2. Separate. Put the plastic mediator in the slot and gently separate the halves. If the glue doesn't lend itself, repeat the heating.
3. After disassembly, remove the glue residue from the case and board with alcohol or acetone.

For gluing after repair, use heat glue or bilateral tape 3M VHB. Don’t use superglue – it can damage plastic!

In some models (e.g., Mi). 120W GaN Charger, the case is not only glue-linked, but also ultrasonic welding, and it's almost impossible to disassemble these charges without damaging the case.

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Charging with GaN technology (for example, 120W The models have a smaller board, but also a more fragile one, and their disassembly requires experience and specialized tools.

How to collect charging after repair

Charging assembly is as responsible as disassembly. Follow these rules:

1. Check the location of the parts. Compare it to the photos taken before the disassembly.
2. Secure the board. Make sure it fits tightly to the body and doesn't hang around.
3. Put the plumes in. Put them neatly in the connectors and lock them with latches.
4. Close the case. Put the halves together and tightly squeeze them (if the case is latched).
5. Check the system. Connect the charger to the network and the phone. If it warms or sparkles, turn it off immediately!

If the body was glued, after assembly, put the charge under the press (for example, a heavy book) on the 10-15 minutes to make sure the glue is well-attached.

⚠️ Warning: Don't connect the charger to an expensive device right away! Check it on your old phone or powerbank first. If charging is stable for 30 minutes, you can use it with the main gadget.

What to do if the charging does not work after disassembly

If the charger doesn't show any signs of life after assembly, don't panic.

1. Check the plug. Make sure it's properly connected to the board (sometimes contacts leave when assembled).
2. Measure the voltage. Connect the charger to the mains and check the voltage at the output with a multimeter. USB-Norm for: Standard Charging: 5V ± 0.2B. Rapid chargers: 9V/12V/20B (depending on the model).

Call the chains.

Check the charge.

If there is a voltage at the output, but the phone is not charged:

• 🔌 Check the cable, it may be faulty too.
• 📱 Try another device – maybe the problem is the phone.
• 🔄 Restart your phone – sometimes the power settings are confused.

If the charging sparks or smokes, immediately disconnect it from the mains, which is a sign of short circuit, and further attempts at repair are dangerous.

FAQ: Frequent questions about the dismantling of charges Xiaomi