How to disassemble the robot vacuum cleaner Xiaomi Vacuum Mop Pro: the complete guide

Owners of Xiaomi smart appliances are well aware that the Xiaomi Vacuum Mop Pro (often identified as STYTJ02YM) is one of the most popular in the lineup, but over time even reliable devices require maintenance. The vacuum cleaner stopped charging, lost suction power or made a strange sound when moving? Most likely, fine dust, hair or a jammed wheel mechanism got inside, and it’s time to conduct a diagnosis. Disassembly of this device requires accuracy, since the body is assembled tightly and the plumes inside are compact, but with the right tools, the procedure is quite feasible at home.

Before you start dismantling, you need to prepare the workplace: you need a clean desk with good lighting and a toolkit that includes cross and flat screwdrivers, plastic blades to open the case and tweezers. It is important to understand that self-intervention can lead to the loss of warranty, so if the device is in warranty service, it is better to contact an authorized service center. However, if the warranty period has expired or the case is non-warranty, self-repair will save a significant amount and prolong the life of your robot vacuum cleaner.

In this article, we will take a closer look at the process of complete and partial disassembly, with a particular focus on safe battery extraction and turbobrush cleaning, as these are the units that most often fail. We will also discuss the typical mistakes that beginners make, and give recommendations for proper assembly, so that after work the device works like new. Follow the instructions carefully, take your time and do not use excessive force where parts should come out easily.

Preparation of tools and security measures

The success of any repair operation depends on 80% on proper preparation. To disassemble the Xiaomi Vacuum Mop Pro, you will need a standard set of wizards: Phillips screwdrivers size PH1 and PH2, a plastic card or special pry-tools to open the latches, as well as containers for sorting screws. You should not use metal blades to tamper with the covers, as there is a risk of damaging the plastic of the case or, worse, to touch the internal wiring, which can lead to a short circuit.

Special attention should be paid to electrical safety. Before any work begins, the device must be completely turned off. Since the battery will not be immediately removed (it is under the main cover), first of all, disconnect the dock and make sure that the vacuum cleaner is not in charge mode. Even when it is off, the board can remain residual currents, so try not to touch the contacts of connectors and chips with your fingers to avoid static electricity.

⚠️ Warning: Never start disassembling if the battery has visible swelling or damage to the body.

For ease of work, it is recommended to use a magnetic mat or screw cells, since fasteners in Xiaomi can differ in length and diameter in different units. If you confuse the screws during assembly, you risk damaging the threads in the plastic pillars of the case or piercing the body through with too long a screw. Also stock up with isopropyl alcohol and lilaceless wipes to clean contacts and mechanical parts.

Primary dismantling of external components

The disassembly process begins with the dismantling of all removable external modules that do not require the screws to be unscrewed to remove. The first step is to remove the dry garbage container and the wet cleaning module (if installed), which will free up access to the insides and reduce the weight of the device, which will facilitate manipulation. Next, turn the robot upside down to access the bottom panel.

On the bottom panel, the main serviced units are: side brush, main turbobrush and wheels. To remove the side brush, you just need to pull it up, it is attached to a friction joint. The main brush can be removed by opening the locking legs and pulling the handle. Be sure to clean the ends of the brush from the wound hair, as they are often the cause of motor overheating.

• 🔧 Remove the cover of the compartment of the main brush by unscrewing two screws (if any in your revision) or by snapping the locks.
• 🌀 Remove the roller brush and clean it of hair and threads by checking the bearings on the ends.
• 🧹 Remove the side brush by pulling it upwards and remove the contamination from under it.
• 🧼 Wipe the sensors on the bottom of the device with a soft dry cloth.

Once the external nodes are cleaned, you can move to removing the bottom protective panel, which is mounted on several screws around the perimeter and possibly on hidden latches. In the Vacuum Mop Pro, the screws can be closed with rubber legs or decorative plugs that need to be gently tucked into a thin tool. After unscrewing all the visible screws, use a plastic blade to go around the perimeter and release the latches.

Removing the bottom panel and accessing the battery

Once the bottom panel is removed, you will have access to the main interior layout. Unlike some other models, the battery is conveniently located here, but it is connected to the motherboard through a connector that requires careful handling. The battery in Xiaomi Vacuum Mop Pro is an assembly of several lithium-ion cells in a plastic casing.

The first thing you do is turn off the battery plume, find the connector that runs from the battery to the main board, and it's usually equipped with a lock that you bend or pull up gently, without swinging from side to side, so as not to break the contacts on the board, and after the power is turned off, you can safely manipulate the electronics further.

The battery itself is usually mounted in two or four screws. Once the battery is unscrewed, the battery can be removed from the niche. If you're planning a replacement, make sure the new battery has identical voltage and capacity parameters, as well as a physical connector. Installing an inappropriate battery can damage the charge controller.

Disassembly of the top and turbines

To access the turbine engine and the laser rangefinder (LDS), you need to remove the top cover of the case, which is more complicated because the tails of the buttons, the indicators and the lidar itself are hidden under the cover, and you first need to twist the screws around the perimeter of the upper part, often hidden under decorative rings or rubber bumper elements.

You can't lift the top cover abruptly. First, gently lift it a few millimeters and inspect the connections. The plumes can go to the button board and the LDS module. Unplug them using tweezers or nails, carefully flexing the connector locks. Only after all communications are turned off can the top of the case be completely removed.

The turbine (the impeller motor) is attached to the body through rubber dampers and screws. This is where fine dust most often accumulates, which over time can clog the motor bearings, causing a characteristic whistle or hum. To clean or replace the engine, you need to disconnect the duct (pipe) and twist the turbine fasteners.

• 💨 Disconnect the corrugated tube from the turbine exit by weakening the clamping or removing it from the retainer.
• ⚙️ Unscrew the screws holding the turbine motor and remove the cleaning assembly.
• 🌪️ Check the lid for foreign objects and dust.
• 🔌 Check the motor contacts for oxidation.

⚠️ Warning: When removing the turbine pipe, be careful not to damage the rubber seals. Violation of the duct seal will lead to a sharp drop in suction power and loss of some dust past the container.

If you get to the LDS laser module, which is located in the "turret" at the top, remember that inside is the optics and the rotation motor. It is not recommended to disassemble the LDS unit itself without extreme necessity, since it is difficult to calibrate back. It is usually enough to blow it with compressed air from dust.

Maintenance of chassis and wheels

Navigation problems and robot jamming are often chassis-related. The wheel modules in the Xiaomi Vacuum Mop Pro are removable and screwed to the body. If the robot starts creaking, runs through the rapids poorly, or makes a wheel error, it's likely that the bearing has got hair or dried grease.

To remove the wheel, you have to unscrew the two or three screws holding the module and disconnect the engine plume. The plume is very thin and easily torn, so you can't pull it, just for the plastic connector. Once the module is removed, you can remove the rubber tire itself and clean the axis of the wound hair.

Bearing lubrication is a critical maintenance step: use only special lubricants for plastic gears and bearings (such as silicone or Teflon). Thick lithium lubricants or WD-40 oil (which is a solvent, not a lubricant) cannot be used, as they can eat up plastic or leak out, collecting even more dust.

Pay special attention to the front rotary wheel, which often jams due to the entry of small debris, which can be removed by simply pulling up with force (it is held on a magnet or tight fit), and wash the mechanism of the fork.

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Regularly cleaning the wheel axles from the hair prolongs the life of the wheel motors and prevents navigation errors associated with slippage.

Assembly and performance check

The assembly is done in reverse disassembly, and the most important thing is to remember to connect all the plumes before the lids are placed in place, make sure that the connectors are snapped with a characteristic click, and the flat plumes are entered straight and straight. When laying wires and plumes, make sure that they do not fall under moving parts or are squeezed by the body.

Once you have the bottom cover and you've got all the screws rolled, flip the robot over and you've got the battery, plug the battery connector into the board, and at that point, the robot can beep, or start the system, which is OK, and set up a dust container and start the device.

Do a test run: run the cleaning, check the turbine, the wheels and the side brush rotation. Make sure the robot builds the map correctly (if LDS is used) and doesn't make any extraneous noise. If everything is working properly, the repair is considered successful.

• 🔌 Connect all plumes to the final assembly of the body.
• 🔩 Twisting the screws without excessive effort so as not to break the thread.
• 🧪 Complete cleaning cycle to check all systems.
• 📱 Check the connection with the Mi Home app.

If the robot behaves strangely after assembly (e.g., does not see the docking station or loses the map), check the charging terminal contacts on the bottom and make sure the laser sensor is clean and not closed.

Frequently Asked Questions (FAQ)