How to disassemble the robot vacuum cleaner Xiaomi Vacuum Cleaner 1S: instructions with photos and repair tips

Why should you take down the Xiaomi Vacuum Cleaner 1S?

Xiaomi Mi Vacuum Cleaner 1S is a popular model with laser navigation and powerful suction, but even this requires periodic maintenance. Over time, dust, hair and debris accumulate inside the device, which can not always be removed by standard cleaning.

- deep cleaning of the fan, engine and sensors from old dirt;

- replacement of worn parts (brush, wheels, battery);

Repairs after falls or collisions;

- modernization (for example, the installation of a more capacious battery).

Unlike Xiaomi’s new modular design, the Vacuum Cleaner 1S is more complex — there are no one-click latches, and the body is fastened by screws and hidden locks. The main danger when disassembling is damage to the laser rangefinder plumes (LDS) or power connectors, which will lead to navigation errors or complete device failure. If you are not sure about your skills, you better contact the service center. But if you decide to act yourself, this instruction will help avoid typical errors.

Preparation for disassembly: tools and security measures

Before you start, make sure you have everything you need. Xiaomi Vacuum Cleaner 1S does not understand with bare hands - you will need specialized tools:

• 🔧 Screwdriver. TORX T8 and T10 — for shell screws and lid fixing.
• 🔨 Plastic mediator or spatula - to gently separate the latches.
• 🧲 Magnetic substrate or bowl – for storing small screws (they are easy to lose!).
• 📸 Smartphone for photography – fix the location of plumes and connectors before turning off.
• 🧴 Isopropyl alcohol (70%+) — Cleaning contacts and fees.

Also prepare the workplace: a table with good lighting, no carpeting (screws can roll). Be sure to remove the battery before disassembling - this will prevent short circuit. To remove it, first unscrew the 4 screws on the bottom cover (under the rubber bumper).

⚠️ Warning: Do not use metal screwdrivers to separate plastic latches, they leave scratches and can break the locks. If the latches do not respond, check if all screws are twisted.

The first step is the disassembly of the Xiaomi Vacuum Cleaner 1S

Start by removing the top cover, where the power button and the laser rangefinder are located.

1. Take the dust collector and the filters off. Press the red latch of the container and pull it up. Remove it. HEPA-filter.
2. Unscrew the 4 T8 screws on the top cover (two in front under rubber plugs, two in the back).
3. Carefully apply the lid to the power button. Start at the corner and move gradually around the perimeter. Be careful, there's a plume inside that connects the button to the board!
4. Disconnect the button plume (white connector, latched) Don't pull the wires, just the plastic tongue!

Now you have access to the internal components. At this point, you can clean the fan and radiator of dust with compressed air (don't use wet wipes!). If the purpose of disassembly is to replace the battery or repair the board, move to the next section.

Battery's off.|The location of the plumes is photographed|The screws are folded in a separate container|There is a plastic mediator on hand.-->

Dismantling of battery and control board

The Xiaomi Vacuum Cleaner 1S battery is one of the most vulnerable, and over time it loses capacity, and the robot begins to "forget" the map or not reach the base.

1. Unscrew the 4 T10 screws that attach the battery to the body.
2. Unplug the power connector (black, red and black wires) Don't pull the wires, just behind the plastic case of the connector!
3. Take the battery out. Notice the model, BMS-042 or BMS-043 (specified on the sticker), and replace it with the same label.

To access the control board, unscrew 6 T8 screws on the metal screen (3 front, 3 back). Carefully raise the screen - there is a laser rangefinder plume underneath. Don't touch the LDS contacts with your hands - fat traces can distort the signal.

⚠️ Note: If the robot makes an error after disassembly 02-03-00 (Laser rangefinder problem, check the integrity of the plume LDS. Often the error is due to overbending or contamination of the contacts.

Cleaning and maintenance of key nodes

The main reason for the performance decline of Xiaomi Vacuum Cleaner 1S is clogging of the engine and ductwork. Here is how to clean them correctly:

• 🌀 Fan and engine: Remove the plastic casing (2 latches) and remove the wound hair from the fan shaft. Use a wooden stick or tweezers to clean - metal tools can scratch the blades.
• 🔄 Side brush: Remove it from the socket, rinse it under warm water, and lubricate the axis with silicone lubrication. If the brush slips, check the gear drive.
• 🛡️ Collision sensors: Wipe the IR sensors (front) with a cotton swab dipped in alcohol.
• 🔋 Charging contacts: Oxidized base and robot contacts clean with a lasticle or alcohol. If contacts are bent, carefully align them with tweezers.

For deep engine cleaning:

1. Disconnect the air duct from the engine (latch on the side).
2. Blow the engine with compressed air (pressure not more than 3 bar).
3. If there is a backlash on the shaft of the engine or a grinding sound is heard, replacement of bearings will be required (this is a difficult repair, it is better to trust specialists).

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If the robot is less sucking after cleaning, check the tightness of the duct, often due to a crack in the plastic pipe or a loose fit of the filters.

Common Mistakes in Disassembly and How to Avoid Them

Even experienced users make mistakes that lead to breakdowns, and here are the most common ones:

• 🔌 The most common type of laser rangefinder is the plume, which is overburdened or pulled by wires. Always hold on to the plastic connector!
• 🔋 Short circuit: If you don't turn off the battery before you disassemble it, accidentally tapping the contacts with a screwdriver can burn the board.
• 🔧 Loss of screws. Rotors of different sizes -- if you mix them up, the body will hang around or crack. Store them in separate containers with signatures.
• 🛠️ Seal damage, rubber duct gaskets tearing from careless dismantling, take a picture of their location before you take them down.

If the robot behaves inadequately after assembly (for example, it rides in a circle or does not see obstacles), check:

• Integrity of the gyroscope plume (located under the control board).
• Correctness of connection of collision sensors (tangled connectors lead to chaotic movement).
• The purity of the laser rangefinder lens (even a fingerprint distorts the map).

When the disassembly will not help: signs of serious breakdowns

Not all problems Xiaomi Vacuum Cleaner 1S solved cleaning or replacing the battery.

• 🚨 Mistake. 01-00-00 (If the engine doesn't rotate even after cleaning, it's likely that the winding has burned or the controller has failed. 60-80% cost of a new robot.
• 🌡️ Overheating and automatic shutdown. If the robot shuts down through 5-10 It's either thermosensor or the circuit board short circuit, and it requires soldering equipment.
• 🗺️ Permanent loss of map. If the robot builds a new map every time, the problem could be a faulty gyroscope or a laser rangefinder. LDS cost ~3,000 rubles.
• 🔊 Extraneous sounds (screaming, screeching) may come from engine bearings, wheel drive gears, or a damaged turbine.

If you are facing one of these problems, consider repairs, such as replacing the control board in the service costs ~5,000 rubles, while the new Xiaomi Vacuum Cleaner 1S can be bought for ~12,000 rubles (2026), sometimes it is more profitable to sell a defective robot for parts and buy a new one.

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Before you carry the robot to the service, check if the warranty period has expired. Xiaomi official warranty on Vacuum Cleaner 1S is 12 months, but some service centers repair and after the expiration of the term for a fee.

FAQ: Frequent questions about the Xiaomi Vacuum Cleaner 1S