Why to disassemble Xiaomi soapbox and when it is dangerous
Xiaomi compact cameras (popularly called soapboxes) of the Mi Compact, Mi Pocket or Mi Mini series, despite budgetary constraints, often require disassembly: from trivial cleaning of the lens to replacing the battery or repairing buttons. But before you take up the screwdriver, assess the risks. These devices are assembled on miniature screws T3 and T4, a boards inside are often glued with double-sided tape - one careless movement, and you risk tearing off the display plume or damaging the flexible flat cable (FPC) matrix.
The most common reasons for disassembly are the Mi Compact Camera (2018-2021) and Mi Pocket 2 (2022) most often disassembled to replace the battery (capacity drops after 300-400 charging cycles), clean the sensors or repair the zoom mechanism. But the Mi Mini 3 (2023) suffers from microphone defects - its membrane is clogged with dust through the grate of the case. If your camera stops focusing, gives out artifacts in the photo or does not turn on, disassembly can help diagnose the problem.
However, there are cases when it is better to contact the service:
✅ Cracks on the matrix or lens (need special equipment for alignment).
✅ Camera fell into water (corrosion on board requires ultrasonic cleaning).
✅ The touchscreen is not working (often the controller is to blame, not the mechanics).
Preparation: tools and security
To disassemble the Xiaomi soapbox, you will need a specialized set, since standard screwdrivers can damage the screws.
- 🔧 Screwdrivers: T3, T4 (torx), PH000 (cross for small screws), 1.5 mm flat (for slatting latches).
- 🧲 Magnetic mat or tray for screws (in soapboxes of them 12-18 pieces, easy to lose!).
- 🔍 Lupe with backlight - screws and connectors are tiny, and the inscriptions on the board are barely visible.
- 🧴 Isopropyl alcohol (90%+) and cotton swabs to clean contacts.
- 📱 Dryer or thermo-air station (if you need to unstick the battery).
A critical nuance: in models from 2022 to 2026 (for example, the Mi Pocket 2 Pro), the screws under the back cover are of different lengths - mixed up in places, and you risk damaging the board when you build. To avoid this, arrange the screws in groups or photograph their location before extraction.
Also prepare the workplace:
✔ A table with good lighting (perfect — LED-color-temperature 5000K).
✔ Antistatic mat or at least plastic film under the camera.
✔ Spare battery (if you are planning to replace) – original Xiaomi batteries are code-marked MB-BXX (where XX — model).
⚠️ Warning: Do not disassemble the camera in humidity above 60% - condensation on the board can cause a short circuit. +18°C), warm up the camera in your hands for 10-15 minutes to avoid cracks on plastic parts.
☑️ Preparation for disassembly
Step-by-step disassembly of the body of Xiaomi soap
Let's start by removing the back cover, which is the most critical step, and most models use 6 to 8 screws and perimeter latches.
- Remove the battery. If the battery is swelling, don't try to remove it by force, puncture it in safety glasses outside (it emits toxic gas!). In normal condition, the battery is tampered with a plastic spatula, preheated with a hairdryer to 60-70°C (not higher!).
- Unscrew the screws. In the Mi Compact Camera, they're hidden under stickers (take care of them with a knife). In Mi Pocket 2, two screws are hidden under rubber legs.
- Disconnect the latches. Use a plastic mediator as you move from the corners to the center. Apply a force parallel to the body, and if you push it perpendicularly, you break the clips.
After removing the cover, you will see:
- Basic board with processor and memory (usually closed with metal screen).
Display plume (thin orange or black cable).
- Speaker and microphone (at the top of the body).
- Control buttons (soldered to the daughter board).
In models with optical zoom (for example, Mi Pocket 2 Pro) under the lid also visible mechanism of lenses — do not touch it with your hands, so as not to disturb the alignment. If the lens is not retracted when turned off, the problem may be in the gears of this mechanism.
| Camera model | Number of screws | Latch type | Features |
|---|---|---|---|
| Mi Compact Camera (2018) | 6 | Plastic clips | Screws under stickers, battery on glue |
| Mi Pocket 2 (2021) | 8 | Metal latches | Two screws under rubber legs |
| Mi Mini 3 (2023) | 10 | Combined | The display plume is fragile, easily torn |
⚠️ Attention: In Mi Pocket 2, the display plume is glued to the lid with double-sided tape. Don't pull it by the wires - gently tuck the tape with a nail or a wooden stick, then unplug the jack on the board.
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If the screw does not unscrew, drop on it. WD-40 Or alcohol, it will dissolve any corrosion that you might have, but don't use oil, it draws dust to pay.
Motherboard extraction and diagnosis
Once the lid is removed, you can start removing the board, which requires special care, because there are often soldered components (capacitors, resistors) on the back that are easy to tear off.
- Disconnect all the plumes. Xiaomi usually has three: - Display (wide, 20-24 contacts). - Camera (thin, 10-12 contacts). - Control buttons (miniature, 4-6 contacts).
- Unscrew the mounting screws. There are four in the Mi Mini 3, and six in the Mi Pocket 2 (two of them hold a metal screen).
- Carefully raise the fee. If it's "feeling," don't pull, warm up the dryer on the back (maximum 80).°C).
You can now check the damage charge:
Darkened or bloated capacitors (especially near the processor) are a sign of overheating.
Oxidized contacts (green coating) - require cleaning with alcohol.
Cracks on the tracks - often occur after falls.
To diagnose malfunctions, use a multimeter:
- Call the food chain (usually the contact line) VCC and GND battery-powered).
Check the resistance of the buttons (normally 0-50 Ohms when pressed).
Measure the voltage on the capacitors (should conform to the marking).
If the camera doesn't turn on, but the board is visually intact, the problem may be the firmware. USB-C port USB-A to USB-C MiFlash).
How to check the fee without a multimeter?
Disassembly of the lens and the zoom mechanism
The zoom lens and mechanism are the most vulnerable parts of the soapbox. Xiaomi uses two types of designs:
1. Fixed lens (e.g., in Mi Compact Camera) – easier to repair, but suffers from dust on the lenses.
Retractable zoom (in Mi Pocket 2 Pro) is a complex mechanism with gears and motor.
To disassemble the lens:
1. Remove the front panel (it is supported by 3-4 screws and latches).
2. Carefully remove the block of lenses - in some models it is fixed by a rubber ring.
3. Blow the lenses with compressed air (do not use wet wipes!).
If the zoom is not working:
Check the gears for chips (a common problem after falls).
- Lubricate the mechanism with silicone lubricant (not oil!).
Call the zoom motor - the resistance of the winding should be 10-30 ohms.
In Mi Pocket 2, the zoom position sensor, a small chip next to the motor, often breaks down. If the camera produces a Lens Error error, try to clean the sensor contacts with alcohol.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| No lens is being put forward | Zoom gears clogged | Cleaning and lubrication of the mechanism |
| Photos blurred around the edges | Dust on the lenses or shifting focus | Air purging or adjustment |
| The camera makes an error when it is turned on. | Zoom sensor malfunctioned | Replacement of sensor or board |
⚠️ Warning: Do not touch lenses with your bare hands - the fat from your fingers leaves stains that cannot be removed without disassembling the lens. Use nitrile gloves or take the lenses by the edges.
Replacement of the battery: nuances and errors
The battery in Xiaomi soaps is consumable: after 2-3 years, the capacity drops by 30-40%. The replacement seems simple, but there are pitfalls here:
- 🔋 Original vs. analogue. Original batteries (MB-B07 Mi Compact, MB-B12 Mi Pocket 2's last longer, but cost 2-3 times more than their counterparts. Cheap batteries often swell after six months.
- 🔌 The newer models have a battery glued to the body, you can't pull it off by force.°C and tuck in a plastic spatula.
- ⚡ Calibration: After replacing the battery, fully discharge and charge the camera 2-3 times to make the power controller "accustomed" to the new capacity.
Step-by-step instructions for replacement:
1. Turn off the camera and remove the memory card.
2. heat the back cover with a hairdryer (if the battery is glue-on).
3. Tap the battery with a plastic spatula, starting at the corner.
4. disconnect the power plume (attentively - the connector is fragile!).
5. Install a new battery with tape (don’t use superglue!).
Important: in the Mi Mini 3, the battery is connected to the board not only with a plume, but also with a thermal sensor. If you tear it off, the camera will shut off when you heat it up. Before you remove the battery, take a picture of the location of the sensor!
If the camera is not switched on after replacement:
Check the polarity of the connection (plus and minus on the plume).
Make sure the connector is fully in the connector (clicking should be heard).
Try charging the camera from another power supply (sometimes the problem is in the RAM).
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Never use metal tools to retrieve the battery - a short circuit can burn the board. Just plastic or wood!
Camera assembly and performance check
Assembly is as important as disassembly, and the rule is, you have to do it in reverse, but with the nuances in mind.
- 🔩 Screw them cross-curl to avoid board skewing. In Mi Pocket 2, first lock the corner screws, then the center screws.
- 📶 Trains. Connect them after the board is fixed, so you avoid tension of the cables. The display plume should lie free, without bending.
- 🔍 Dust protection. Before closing the lid, blow the body with compressed air. Dust is the main enemy of the zoom mechanism!
After assembly, perform the test:
1. Turn on the camera and check all buttons.
2. Take test pictures in different modes (flash, zoom, macro).
3. Test the recording of the video with the microphone (sometimes after disassembly the sound disappears due to poor contact of the plume).
4. Check Wi-Fi and Bluetooth (if any)
If something's not working:
- Camera not turning on: check the battery and power plume.
- The lens does not focus: it is possible that the lens shifted during the assembly (redisassembly is necessary).
Artifacts on the screen: poor contact of the display plume or damage to the matrix.
The Mi Compact Camera sometimes sticks buttons after assembly, which means that they get dust or plastic guides warped, so the solution is to take the camera apart and clean the buttons with alcohol.
☑️ Post-assembly check
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen make mistakes when disassembling Xiaomi soaps.
- 🔧 The Mi Mini 3 has soft metal screws, and if you pull it over, the head licks. Solution: use a magnetic screwdriver and don't use excessive force.
- 💥 The display plume in Mi Pocket 2 is glued to the lid, and if you pull it, it will break. Always unplug the jack on the board before you remove the lid.
- 🔥 Overheating of the board. When soldering or drying with a hair dryer, the temperature is above 80°C can melt capacitors. Use thermocouples to control heating.
- 📵 Loss of screws. Soapboxes have screws of different lengths, if you confuse them, the board is warped. Solution: spread them out on signature envelopes.
Another common problem is the wrong assembly of the zoom mechanism. If the lens is crooked or jammed after repair, check:
- Cogs (they must enter each other without backlash).
- Spring tension (in Mi Pocket 2 Pro it often jumps).
- Cleanliness of the guides (dust or lubrication on the rails cause jamming).
If after disassembly the camera began to warm up stronger than usual, the probable reasons:
Poor contact between the radiator and the processor (a new thermal paste must be applied).
Short circuit on the board (check the multimeter in the "vertebrae" mode).
Faulty battery (blown batteries heat up when charging).
⚠️ Note: In models with infrared port (e.g. Mi Compact Camera) IR) After disassembly, the remote control may stop working. This means that the IR sensor is damaged - it is located on a separate small board next to the lens.