Xiaomi weights analysis: a step-by-step guide with photos, schemes and life hacks

The Xiaomi Mi Body Composition Scale has become an integral part of the Mi Home ecosystem, but even the most reliable equipment sometimes requires intervention. The battery sat down at the wrong time, the sensor stopped reading the weight correctly, or after a fall, the backlash of the body appeared, in which cases disassembly of the device can save the situation. However, the design of the Xiaomi scales has its own features: hidden latches, fragile plastic elements and the risk of damage to touch contacts.

In this article, you will find step-by-step instructions with photos of key stages, a list of necessary tools (including non-obvious ones), as well as unique tips for disassembling without damage. We will analyze the nuances for different models, from the first version of the Mi Scale to the current Xiaomi Smart Scale 2, point out typical errors and tips on how to avoid sensor breakdowns. If you have never disassembled Xiaomi gadgets before, this guide will help you do everything neatly and without unnecessary risks.

⚠️ Important: Xiaomi's weights are disassembled, and if the device is warranty, contact the service center first. CR2032 It can cause it to swell or leak electrolyte.

1.Preparation: security tools and measures

Before you start disassembling, make sure you have everything you need. Xiaomi scales are assembled without any visible screws, so the classic screwdriver won't help here.

• 🔧 Plastic mediator (or guitar) - to disconnect the body without scratches.
• 🔋 New battery CR2032 (If the reason for the disassembly is its replacement).
• 🧲 Magnet – Helps to remove the battery from the socket without scratching the contacts.
• 📸 Smartphone with camera – to capture the location of parts before disassembly.
• 🧴 Isopropyl alcohol (70%+) — Cleaning sensor contacts if necessary.

Also, prepare your workspace: a table with a soft substrate (like a towel), good lighting and a container for small parts. Don't use metal tools to separate the case - they leave microcracks on the plastic that eventually lead to splitting.

⚠️ Attention: If the scales fell from a height of more than 1 meter, check the integrity of the glass panel before disassembling. Cracks may not be noticeable to the naked eye, but when pressed, the glass will split, injuring the hands.

Disassembly of the shell: hidden latches and their location

Xiaomi's scale body consists of two parts: the top glass panel with sensors and the bottom plastic stand, connected by 4-6 plastic latches located around the perimeter, the main difficulty is that the latches are fragile and break when exposed to rough influence.

Disassembly algorithm:

1. Put the scales with glass down on a soft surface.
2. Insert a plastic mediator into the gap between the glass and plastic at one of the corners (better start with where there is no on button).
3. Carefully drive the mediator along the side, alternately snapping the locks, and with the right force, you will hear slight clicks.
4. After cracking the 3-4 latch, the glass will begin to separate - do not pull it sharply so as not to break the sensor plume!

On the Mi Smart Scale 2 models, the latches are asymmetrically positioned: two on the side and one at the button and the battery connector. If the mediator does not pass, try to heat the body slightly with a hairdryer (temperature not higher than 50 ° C) - the plastic will become softer.

3. Battery Removal and Replacement: Nuances with Contacts

When you separate the glass panel, you'll see a circular CR2032 battery, which is locked by a metal holder, and don't try to pull it out with your fingers or a screwdriver, because it warps the contacts.

1. Put the battery on the side with a magnet or plastic spatula (not behind the center!).
2. If the battery is "rigged", gently swing it from side to side, without applying vertical force.
3. Clean the holder's contacts with a cotton swab soaked in isopropyl alcohol.
4. Install the new battery with a positive side upwards (the case has a marking "+").

⚠️ Critical error: Many users put the battery upside down, which means the scales don't turn on. On the Mi Smart Scale 2 models, the contacts are asymmetrically positioned - if installed improperly, the battery quickly dies due to a short circuit.

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If the scales are not turned on after the battery is replaced, check the integrity of the spring contact in the holder. Often it bends when the old battery is removed and does not touch the new one.

The photo below shows the correct battery installation order (Mi Scale 1, right, Mi Smart Scale 2):

[This would be a photo marked polarity, but in text format we will describe the key visual features]:

• On the Mi Scale 1, the plus contact is marked by a point next to the holder.
• On the Mi Smart Scale 2 plus is indicated by a small triangle on the board.

4.Diagnostics and repair of sensors: what can be repaired on your own

If the scales show an incorrect weight, do not sync with the Mi Home or give an Err error, the problem can be hidden in the sensors. Xiaomi devices use a strain gauge sensor — a thin film with a spray that is attached to the glass panel, it is easy to damage, but it is almost impossible to repair at home.

What can be checked and repaired:

• 🔌 Oxidation of contacts - clean them with alcohol and gently wipe with a lastic (to remove oxides).
• 📶 Train break – if the scales stopped turning on after falling, examine the flexible plume between the glass and the board.
• 🔄 Calibration failure – after assembly, put the scales on a flat surface, press the on button and hold for 10 seconds to reset.

Failures not to be repaired:

• Cracks on the glass panel (even microcracks distort the readings of the sensors).
• Detachment of strain film from glass.
• Damage to the ESP8266 chip (responsible for wireless communication)

⚠️ Warning: If after the weight is broken, the weight is wrong. ±5kg, don't be quick to blame the sensors. Often the cause is improper assembly: check if the glass fits evenly to the body. 0.5mm gaps are enough to distort the readings.

5.Assemblying the scales: how to avoid mistakes

Xiaomi's scales are harder to piece together than they are to disassemble -- precision is important.

1. Make sure that the plume of the sensors is not twisted and lies in the grooves of the body.
2. Combine the glass panel with the plastic base, starting on the opposite button side.
3. Press on the corners until characteristic clicks (effort should be uniform!).
4. Check the performance: turn on the scales and put a load on them (for example, a bottle of water).

Typical errors in assembly:

• 🔄 Shaped glass – scales will show weight with a shift in one of the corners.
• 🔌 Clutched plume – leads to Err 2 error (no communication with sensors).
• 🔋 Insufficient force when snapping - over time the body will disperse.

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If the scales don't turn on after assembly, check the polarity of the battery and the integrity of the spring contact. 90% of the time, that's the problem, not the board.

6. Alternative methods of repair without disassembly

Not all problems require opening the body. Try these methods before disassembling:

• 🔄 Reset: Hold the on button for 15 seconds. Libra will go back to factory settings and reconnect to Mi Home.
• 📱 Firmware Update: In the Mi Home app, check for updates for your model (relevant for Mi Smart Scale 2).
• 🧲 Calibration: Put the scales on a perfectly flat surface (for example, a tile), press a button and wait for the readings to zero.

If the scales are not turned on at all, try the "resuscitation" of the battery:

1. Remove the battery for 1 minute.
2. Change it (upside down) for 10 seconds, then set it correctly.
3. This method sometimes resets the protection against deep discharge.

⚠️ Warning: If the scales show an Err 5, it indicates a critical sensor error, in which case disassembly will not help - you need to replace the glass panel with sensors (cost) ~70% of new weights).

7.Where to buy Xiaomi weights spare parts

If after the diagnosis it turned out that you need to replace parts, here is where to look for them:

On AliExpress, look for:

• Xiaomi Mi Scale Glass Panel – Glass Panel
• Mi Smart Scale 2 motherboard – the fee
• CR2032 battery holder: battery holder.

⚠️ Note: When buying parts, check compatibility with your model. For example, glass from Mi Scale 1 will not be suitable for Mi Smart Scale 2 due to different plume connectors.

FAQ: Frequent questions about the breakdown of Xiaomi weights