We disassemble the steamer Xiaomi Derma: detailed instructions with photos and expert advice

The Xiaomi Derma steamer is a popular face care device that combines pore cleaning, moisturizing and massage. However, over time, even the most reliable technique requires maintenance: cleaning scale, replacing seals or repairing electronics. Disassembly is a critical process where an error can lead to the breakdown of delicate components or loss of leakage of the steam generator.

In this article, you will find step-by-step disassembly instructions tailored to the design of the Xiaomi Derma, a list of necessary tools and critical nuances that the manufacturer does not specify in the official documentation. We will also analyze typical problems (for example, steam leaking due to a worn gasket between the tank and the heating element) and give recommendations for their elimination.

Preparation for disassembly: tools and security measures

Before disassembling, make sure the device is completely cooled - the steam generator and metal parts can keep the temperature high for up to 30 minutes after turning off.

• 🔌 Disconnect the steamer from the network and remove the plug from the socket.
• 💧 Plug the water from the tank (tilt the device over the sink and press the steam supply button for 5-7 seconds).
• 🧼 Wipe the body and nozzles with an alcohol napkin - this will prevent dirt from entering the mechanism.
• 📸 Take a picture of the device from all sides – this will help to properly assemble it back.

You will need to disassemble:

⚠️ Warning: Do not use metal screwdrivers to separate plastic latches - this will cause chips and cracks in the case. Xiaomi Derma has fragile locks, especially in the tank mounting area.

Removal of the upper cover and access to the electronic unit

So we start by dismantling the top of the case, where the power button and the indicator are, and this is the most important step, because most of the latches are concentrated here.

1. Turn the steamer upside down and place it on a soft cloth (towel) to avoid scratching the plastic.
2. Carefully insert the plastic blade into the gap between the top and bottom of the body from the power button. Smoothly move the blade along the seam, alternately snapping the locks (there are only 6: 2 on the sides and 4 on the front panel).
3. After all the latches are freed, lift the upper cover by 1-2 cm and put it aside. Do not pull too much - 2 wires are attached to the cover (power button and indicator).

Under the lid, you'll see:

• 🔋 Printed board with control chip (marking) XM-DERMA-V1.3).
• 🔥 Heating element with a thermal fuse (white cylinder with two contacts).
• 💧 Steam supply tube with silicone sealer.

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If the latches do not lend themselves, slightly heat the body with a hairdryer (temperature 40-50 ° C) - the plastic will become more elastic, and the risk of breaking the locks will decrease.

Dismantling of water tank and steam generator

The Xiaomi Derma tank is attached to the body with three screws and an additional latch on the back wall. The main thing here is not to damage the steam conductor tube that connects the tank to the heating element.

Sequence of action:

Unscrew 3 PH00 screws on the bottom of the body |

Disconnect the heater power connector (white connector)|

Carefully remove the tank, holding the supply tube steam |

Check the integrity of the silicone gasket (black ring with a diameter of 22 mm)-->

Pay special attention to the condition of the gasket: if it has lost elasticity or cracks, it must be replaced. It is the wear of this seal that causes vapor leaks in 80% of cases. The original gasket for Xiaomi Derma can be found on the MDZ-22-DERMA article or order universal silicone rings with an internal diameter of 20 mm.

⚠️ Warning: Do not touch the contacts of the heating element with your bare hands - they may remain a fatty trace, which will lead to oxidation and poor contact. Use gloves or wipe the contacts with alcohol.

Cleaning of the heating element and tubes

Scale and mineral deposits are the main enemies of any steam generator.

• 🔥 Heating spiral (covered with white coating when using hard water).
• 💨 Steam supply tube (clogged with scales, reducing vapor pressure).
• 🚰 Coarse cleaning filter (metal mesh at the tank entrance).

Use:

After cleaning, be sure to rinse all parts with distilled water and dry with compressed air (such as a cold dryer).

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Never use abrasives (sand, dry soda) to clean – they scratch the surface of the heater, accelerating the formation of scale in the future.

Diagnostics and repair of electronic unit

If the steamer doesn't turn on, doesn't heat the water, or the error indicator flashes, the problem may lie in the electronic unit.

• 🔋 Bloated capacitors on the board (visually visible on the convex upper part).
• 🔥 Burnt-out thermal fuse (black trace on the body or break of the chain when vertebrating a multimeter).
• 📶 Oxidized contacts of connectors (greenish coating).

To verify:

1. Disconnect the board from the heating element and the power button.
2. Call the chain multimeter in 200 Ω mode: the resistance of the heater should be within 45-55 Ω. The resistance of the fuse is 0 Ω (if it shows "1", the part is burned).

Examine the board tracks under the magnifying glass - microcracks can be invisible to the naked eye.

Replacement of the board elements (capacitors, fuse) is better to trust a specialist, but if you have experience in soldering, you can use analogues:

• 🔧 Thermal fuse: 125°C 10A (articular TF-125-10).
• 🔋 Condensers: 470µF 16V (diameter 8 mm, step of conclusions 3.5 mm).

Assembling the steamer: sequence and verification

The assembly should take place in reverse order, but taking into account the key points:

1. Make sure that the silicone gasket of the tank is installed smoothly and not twisted. Its protrusion should be directed towards the heating element.
2. Connect the card connectors to the button and the heater until the lid is fixed - so it is easier to control the correctness of the connection.
3. Twisting the screws cross-cross (first two diagonally, then the remaining) to avoid distortion of the body.

After assembly, perform a test check:

1. Pour 50 ml of distilled water into the tank.
2. Turn on the device and wait for the boil (the indicator should burn 3-4 minutes without blinking).
3. Check the tightness: when applying the steam should not be leaks from under the lid or nozzle.

⚠️ Warning: If the steamer makes a hissing sound after assembly or the steam is intermittent, the system is leaky. Immediately turn off the device and check the gasket - it may be crooked or damaged.

Frequent Mistakes and How to Avoid Them

Even experienced craftsmen make mistakes when disassembling Xiaomi Derma.

• 🔧 Breaking screw threads – use a magnetic tip screwdriver and do not apply force.
• 💧 Getting water on the board - before dismantling always drain the remaining liquid and dry the tank.
• 🔥 Overheating of soldering iron during board repair - the temperature should not be higher than 300°C, or the tracks will break off.
• 🧲 Loss of small parts (springs, washers) – use a magnetic mat or container with sections.

If you encounter an atypical problem (e.g., the device turns on but does not heat water), check:

• 🔌 Integrity of the network cord (often rubbed at the base).
• 📡 Thermosensor performance (must show resistance 10) kΩ room-temperature).
• 🔋 The voltage at the output of the power supply unit (should be) 24V ± 0.5V).

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If after disassembly the steamer began to work worse (for example, the steam is weaker), check the position of the adjusting screw on the heater (marked with a red dot).

FAQ: Answers to popular questions