Disassembly of the toothbrush Xiaomi T100: instructions with photos and nuances

The Xiaomi Mi Electric Toothbrush T100 has gained popularity with its combination of affordable price, quality build and premium functionality. However, over time, even such reliable toothbrushing requires maintenance: cleaning from plaque, replacing a brush or battery. Disassembly of the body is the first step in any of these processes, but without knowing the design features of the model, it is easy to damage plastic latches or waterproof pads.

In this article, you'll find detailed instructions with photos of what tools you'll need, and critical nuances that are not covered in standard manuals. We'll not only look at the mechanical part, but also how to avoid the typical mistakes, from damage to leakage, if you're planning to replace the battery or just clean the insides of dust, this guide will help you do everything neatly and without consequences.

⚠️ Warning: Disassembly of the device will void the warranty Xiaomi. If the brush warranties, contact the service center. Also remember that improper assembly can lead to water entering the case and the device fails.

Preparation for disassembly: tools and security measures

Before you start, make sure you have everything you need. Don't use any tools at your disposal (knives, screwdrivers are not in size) - this is almost guaranteed to result in scratches on the case or chipped plastic.

• 🔧 Plastic mediator (or a special blade for disassembling gadgets) - to gently separate the latches.
• 🔋 Thin cross screwdriver (size) PH0 or PH00) — screw-off.
• 🧴 Isopropyl alcohol (70%+) — Cleaning contacts and removing glue residues.
• 📸 Smartphone with camera – to capture the location of parts before disassembly.
• 🧲 Magnetic mat or container – so as not to lose small screws and springs.

Also, prepare the workplace: the desk should be clean, the lights bright. Use an antistatic mat if you have one: static electricity can damage the brush board. Don't disassemble the device on a carpet or soft surface, small parts can easily roll in there.

⚠️ Attention: If the brush T100 It's been in use recently, let it dry completely within 12 to 24 hours, and the moisture inside the case can close the contacts when disassembled.

Xiaomi T100 design: what’s inside and how it works

To understand how to disassemble a brush, you need to know its device. Xiaomi T100 consists of several key modules:

1. The upper part with a nozzle is a removable brush that is attached to a magnetic holder.
2. The case with a power button - here is the control board, battery and vibration motor.
3. Lower cover - closes access to the battery and charging contacts.

The feature of the model is a sealed case with rubber pads that protect the electronics from water (IPX7 standard). It is important not to damage these pads when disassembling, otherwise the brush will lose water protection, and there is a spring contact between the battery and the board, which is easy to lose if you carelessly handle.

Step-by-step: how to disassemble the body of the Xiaomi T100

Now, let's get to the practice, follow the instructions strictly to avoid damage.

1. Remove the nozzle. Pull it up with force, it's held on a magnetic attachment. If the nozzle is not removed, check if it's locked (sometimes after the brush falls, the magnet shifts).
2. Open the bottom cover. Put a plastic mediator on the end of the power button. The lid is held on two latches, so you can be careful not to break them. 💡If the cover does not lend itself, slightly heat it with a hair dryer (no more than 50).°C) - the plastic will become softer and the latches will open easier.
3. Remove the battery. It's attached to double-sided tape. Put it in a mediator and pull it up gently. Don't pull the wires!
4. Disconnect the control board. It's attached to the body with two screws (under the cross screwdriver), unscrew them and remove the board by first disconnecting the engine plume.

⚠️ Note: If you are disassembling a battery replacement brush, do not use models with a capacity above 800 mAh. T100 It is not designed for more powerful batteries, which can lead to overheating.

Typical Disassembly Problems and How to Avoid Them

Even with a careful approach, you can face difficulties, and here are the most common ones and the ways to solve them:

• 🔧 Broken lid latches. If the plastic cracks, use a plastic superglue (like the Loctite Plastics Bonding System). Apply the minimum amount and lock the lid with tape for 12 hours.
• 🔋 Battery doesn't detach. Don't pull the wires! Heat the case with a hairdryer (maximum 60).°C) - the glue will soften. If the wires are off, they can be soldered back (only if you have experience soldering!).
• 💧 Water is removed after disassembly. If the gasket breaks, replace it with a similar one (you can cut it from a 1 mm thick silicone sheet.
• ⚡ The brush doesn't turn on after assembly. Check if the engine plume and battery contacts are connected correctly. Sometimes resetting helps: press the power button for 10 seconds.

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If the brush vibrates weaker or unevenly after disassembly, the motor is likely to have shifted. Take it apart again and check its position, it should fit tightly to the body.

One of the common questions is, can you disassemble a brush without special tools? Theoretically, yes, but the risk of damage increases dramatically. For example, if you use a knife instead of a mediator, you almost certainly will scratch the body or break the latches. Nor do you recommend using metal screwdrivers, they can close contacts on the board.

Cleaning and maintenance of internal components

If you have disassembled a brush for cleaning, pay attention to the following elements:

1. Battery and charging contacts. Clean them with a cotton swab dipped in isopropyl alcohol. Don't use acetone or solvents, they'll damage the plastic!
2. Vibration motor. Remove dust and plaque from its body. If the motor makes extraneous sounds, apply 1 drop of silicone oil to the bearing (don't overdo it!).
3. Control board. Blow it with compressed air (canister) or gently clean it with a soft brush. Don't touch the contacts with your hands, static electricity can damage them.

You can disinfect the insides of the body with an ultraviolet lamp (5-10 minutes) or chlorhexidine (wipe with a napkin dipped in solution).

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If there is rust inside the case (for example, on spring contacts), remove it with an eraser or a special liquid for cleaning electronics (Contact Cleaner).

Battery replacement: which to choose and how to install

The battery in the Xiaomi T100 is one of the most vulnerable places, and over time, it loses capacity, and the brush discharges in a few days instead of the promised 30.

• 🔋 Battery model: the original has a marking BL-5B (800 mAh, 3.7V). Appropriate analogues from Samsung, Panasonic or ATL similarly.
• 🛒 Where to buy: AliExpress (search on request "BL-5B for Xiaomi Toothbrush”), in radio parts stores or service centers.
• ⚠️ What to avoid: batteries with a capacity above 1000 mAh – they may not fit into the case or overheat.

Replacement process:

1. Disconnect the old battery by soldering the wires or carefully trimming them (if soldered to the board).
2. Seal the wires to the new battery, observing the polarity (red - plus, black - minus).
3. Secure the battery to double-sided scotch (use original or 3M VHB).
4. Check the brush before final assembly – if it doesn’t turn on, check the contacts.

⚠️ Warning: If you've never soldered, you should contact the service. Short circuits if soldered incorrectly can disable the control board.

Assembly of brushes: procedure and verification

To assemble Xiaomi T100 need in reverse order, but with some nuances:

1. Set the control board. Secure it with screws, but don't tighten it too much, you can rip the thread.
2. Connect the engine plume. Make sure it sits tightly in the connector. Sometimes it helps to bend the contacts a little bit for better fit.
3. Lay the battery down. Make sure the wires aren't twisted or tightened. Secure the battery with tape.
4. Close the bottom cover. Start at the power button side and gently snap it around the perimeter. If the lid doesn't sit down, check if the gasket is disturbing.

After assembly:

• 🔌 Connect the brush to charge for 30 minutes, even if the indicator is not lit.
• 🧪 Check the leakproofness: lower the brush (without a nozzle) in the water for 10 seconds. If bubbles appear, disassemble and check the pads.
• ⚙️ Turn on the brush and test all vibration modes.

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If the power button is late or double pressed after assembly, it's probably shifted. Take the brush apart and check its position, and the button should fit tightly to the micro-switch on the board.

FAQ: Frequent questions about the dismantling of the Xiaomi T100