Xiaomi’s portable car compressors have proven to be reliable and compact tire pumpers. However, even high-quality equipment over time requires maintenance, dust cleaning, or replacement of worn seals. Users often face the need to access the insides of the device when standard cleaning from the outside does not produce results or when extraneous noise is heard at work.
The process of dismantling these gadgets has its own nuances associated with dense layout and the use of specific screws. In this article, we will take a detailed look at the stages of disassembly of popular models such as the Mijia Portable Electric Air Compressor 1S and earlier versions. You will learn what tools will be required, how not to damage plastic latches and what to look for when you build back.
Before you start taking action, you need to understand that opening the case will void the official warranty. If the device is in warranty service, it is better to contact an authorized service center. However, if the warranty has already expired or the device has failed at the end of its life, self-repair can be a great way to extend the life of a useful gadget without unnecessary costs.
Tools and workplace preparation required
A screwdriver is not enough to disassemble an electronic device safely and efficiently. Xiaomi compressor cases are usually assembled on screws with hidden heads and plastic latches. The right toolkit will take no more than five minutes to prepare, but it will save the body from scratches and chips.
First of all, you'll need a set of precision screwdrivers, and most often, small-sized Phillips screws are used in the design, but in some batches, you may also find screws with a Torx asterisk, and a plastic mediator or a thin blade to open the case that will leave no trace on the glossy plastic will also be extremely useful.
- 🔧 Setting screwdrivers (PH000, PH00) and Torx bits T5-T6
- 🛠 Plastic blade or mediator for opening the body
- 🧤 Antistatic gloves and tweezers for working with small details
- 💡 Bright lamp or table lighting for a good view
Organize your workspace so that light falls evenly without creating deep shadows. Small screws are easily lost on the table, so pre-plan a magnetic mat or several containers to sort the fasteners through the disassembly stages. This will save you a lot of time when you reassemble.
☑️ Preparation for disassembly
Design analysis and search for hidden fasteners
Visual inspection of the device is a critical step that is often ignored by beginners. Xiaomi compressor body looks monolithic, but on closer examination you can find decorative elements that hide the mounting points. Usually the screws hide under rubber linings, silicone plugs or logos.
Pay special attention to the bottom of the device and the area around the charging port. In the Mijia 1S model, the main screws are often located under a decorative ring or in recesses closed with stickers. Carefully probe the surface of the case: any irregularities or inserts may indicate the presence of a hidden fastener.
⚠️ Warning: Do not use metal needles or knives to pick plugs.The sharp metal slips easily and can damage the internal wiring or breach the battery if it is located close to the surface.
If the screws are not visible from the outside, they are probably hidden under a major decorative element, such as a digital display or a rubber leg, and in such cases, you need to exercise the utmost care. Sometimes manufacturers use glue to fix the displays, which requires careful warm-up with a hairdryer before dismantling.
Where to look for screws in the 1S model?
The process of opening the body and dismantling elements
Once you remove all the visible screws, the most critical thing is to disconnect the halves of the body. The plastic latches in Xiaomi devices sit pretty tight. Put a plastic blade in the seam between the halves of the body and make sliding movements along the perimeter, gradually snapping the locks.
Don't try to push the halves of the body at one point, it will break the plastic or crack. Move consistently: click one corner, move to the next. If the resistance is too high, check again if all the screws are twisted, especially those that may have been hidden under the stickers.
Inside, you'll see the main board, the battery pack, and the compressor unit itself. Notice the plumes and wires connecting the display, the buttons and the motor to the motherboard. Before you split the parts completely, make sure all the connectors are disconnected.
Detailed analysis of the compressor mechanism
The heart of the device is the piston compressor unit. This is where the air compression occurs, and this is where the wear and tear most often occurs. The mechanism is usually mounted on the frame with several screws and connected to the electric motor through a rod mechanism or directly.
When disassembling the mechanical part, it is important to remember the order of the washers, gaskets and sealing rings. Losing even a small rubber ring can lead to loss of tightness and inability to pump the wheel to the desired pressure.
Graphite lubricant and wear products can accumulate inside the cylinder, and the cylinder walls and piston must be thoroughly cleaned during maintenance, and if deep scratches are visible on the piston, it may not be feasible to replace it, and it may be easier to replace the entire compressor assembly.
⚠️ Attention: When disassembling the piston group, keep an eye on the direction of valve installation. Reverse assembly of the valve mechanism will cause the compressor to stop pumping air.
To lubricate moving parts after cleaning, use a special heat-resistant lubricant designed for rubber seals and high rotation speeds. Conventional engine oil can destroy rubber parts or burn out when heated.
Diagnostics of electronics and battery
The electronic control board in Xiaomi compressors is responsible for controlling pressure, display and protection against overheating. When disassembling, check the board for swollen capacitors, oxidized contacts or traces of overheating elements.
A battery is usually an assembly of 18650 lithium-ion cells. If the device stops holding charge or is switched on only from the mains, the problem is likely to lie in one of the cells of the battery.
| Component | Possible malfunction | Symptoms. | Decision |
|---|---|---|---|
| Battery | Loss of capacity | It sits down fast, it doesn't turn on. | Replacement of elements 18650 |
| Piston. | Wear of sealer | Air whistle, low pressure | Replacement of cuffs |
| Engine. | Wear of brushes | Sparks, hums, no spinning. | Engine replacement |
| Payment | The controller burned. | No display, no reaction. | Replacement of pay or rations |
When working with electronics, it is important to observe electrostatic safety. Touching the board with a charged body can disable sensitive pressure controller chips. Use an antistatic bracelet or periodically touch a grounded metal object.
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Before soldering the elements on the board, be sure to turn off the battery to avoid short circuits and damage to the tracks.
Device assembly and testing
The assembly is done in reverse disassembly, and it seems obvious, but the main challenge is to put all the screws in their places and connect the plumes correctly, and make sure that the wires are not clamped in the body and do not touch the heating parts of the engine.
Pay special attention to the sealing of the case. If there is a rubber gasket between the halves of the case for dust protection, check its integrity. You can use a thin layer of silicone sealant if necessary, but Xiaomi devices usually have a tight fit of plastic.
First, check the device without a wheel, let the compressor run for 10-15 seconds idling, assess the noise, vibration and heating of the body, and if all the readings are normal, you can test the tire to check the leakiness.
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A high-quality assembly ensures that there is no vibration or extraneous noise. If the device buzzes louder than usual after assembly, check if the engine is correctly standing in its seats.