Replacement of curtains on Xiaomi: from the selection of parts to installation

The curtain on Xiaomi devices is not just a decorative element, but a functional detail that protects the optics of projectors or the matrix of TVs from dust and mechanical damage. Over time, the mechanism wears out: the curtain begins to catch, does not close until the end or makes creaks. If you notice that your Mi Projector or Mi TV stopped opening / closing the protective screen correctly, it is time to think about replacing.

Many users are afraid to disassemble Xiaomi equipment for fear of damaging fragile components. However, with the right approach and a minimum set of tools, it takes no more than 30-40 minutes to replace the curtain. In this article, we will understand how to find the original part, what tools you will need, and guide you through each stage of disassembly and assembly, taking into account the nuances of specific models.

⚠️ The critical moment: On projectors Xiaomi Mi Smart Projector 2/Pro The curtain is connected to the position sensor, and if you damage the contacts when you disassemble it, the device may stop turning on, giving an error. E24 (malfunctioning of the machinery. Be very careful!

1.How to determine if the curtain needs a replacement

Before you rush to look for a new detail, make sure that the problem is in the mechanism of the curtain, not in the software failure.

• 🔊 Extraneous sounds, such as squeaking, cracking, or knocking when opening/closing, are most often caused by dust entering guides or by wear and tear of plastic gears.
• 🚪 Incomplete closure - the curtain stops halfway or leaves a gap. This can be either a mechanical problem or a sensor calibration failure.
• ⚡ Spontaneous operation - the curtain opens/closes without a command, usually associated with oxidation of contacts or damage to the plume.
• 🛑 Locking device – projector or TV does not turn on, gives an error of the type E24, E25 Or a flashing light, 80 percent of the time, it indicates a malfunction.

If the symptoms match, try first resetting the device to factory settings via Settings → System → Reset. Sometimes this helps with software sensor failures. If the problem persists, prepare to be replaced.

2. Selection of spare parts: original vs analogues

The right curtain is not only the longevity of the curtain, but also the compatibility of your model. Xiaomi uses different mechanisms even within the same line of projectors. For example, the curtain from Mi Smart Projector 2 is not suitable for the Mi Smart Projector 2 Pro due to differences in the mounting of the sensor.

Where to look for parts:

• 🛒 Official service centers are guaranteed original parts, but the price can be overstated by 1.5-2 times. For example, the curtain for the Mi Laser Projector will cost 3,500-4000 ₽.
• 🌍 AliExpress – cheaper (from 1 200) ₽), But you're at risk of running into a non-original%+ and reviews with a photo of the installed detail.
• 🔧 Local markets (Avito, Yula) – sometimes used curtains are found in good condition for 500-800 ₽. Check your efficiency before buying!

How do you check compatibility? Compare the article of the part on the old curtain (usually applied to the plastic case) with the offers of the seller. For Xiaomi projectors, the relevant articles:

Important: Xiaomi projectors have been using magnetic curtains instead of mechanical curtains since 2023, and if your model is newer, a conventional curtain won't work, look for the "magnetic latch" in the description.

3. Tools and training required

You don't need professional equipment to replace the curtain, but you can't do without some tools.

• ⚒️ Plastic blades (2-3 pieces) - to disconnect the latches of the case without scratches, mediators or specialized kits for repairing phones will do.
• 🔩 Screwdriver. T5/T6 — Most of the propellers in Xiaomi projectors have a Torx star-shaped slit.
• 🧲 Magnetic mat or container – so as not to lose small screws and springs.
• 📸 Smartphone – take photos of each stage of disassembly, especially the location of plumes and wires.
• 🧴 Isopropyl alcohol (90%+) — purifier.
• 🔋 Hair dryer or thermoair station - if the curtain is glued (relevant to Mi) TV Q2).

Before the start of the work:

1. Disconnect the device from the network and wait for the complete cooling (especially important for laser projectors).
2. Place it on a soft surface (towel or foam) so as not to scratch the body.
3. Prepare a well-lit workplace – you’ll have to deal with small details.

Turn off power and let cool for 30 minutes |

Take a picture of the initial state of the curtain |

Prepare tools and spare parts |

Clean the working surface from dust| -->

⚠️ Warning: On Xiaomi Mi Laser projectors, the curtain blocks access to the laser module "DANGER: LASER RADIATION", Do not remove it or touch the module with your hands – this can lead to loss of warranty and is dangerous to vision!

4 Step-by-step instructions for replacing the curtain

The disassembly process varies depending on the type of device, and we will look at two of the most common cases below: Mi Smart Projector projectors and Mi TVs with mechanical curtains.

Replacement of curtains on Xiaomi projectors

The Mi Smart Projector 2 Pro is a good example.

1. Removing top cover: Turn the projector upside down. Carefully place the plastic blade in the gaps between the top and bottom of the body (start at the rear right corner). Latches fire with a characteristic click - don't put too much effort.
2. Detachment of the curtain plume: Under the lid, you will see a flat plume going from the curtain to the motherboard. Carefully lift the connector lock (usually white or black) and remove the plume. Don't pull the wires!
3. Dismantling the old mechanism: Unscrew the 4 T5 screws that attach the curtain to the body. Remove the mechanism and inspect the gears for wear. If the new curtain is not lubricated, apply the silicone on the guides.
4. Installation of the new curtain: Place the new mechanism in place, secure the screws. Connect the plume, making sure that the lock is snapped. Check the curtain manually, it should move smoothly, without jamming.
5. Sensor calibration: After assembly, turn on the projector. If the curtain does not close automatically, go to the service menu (hold Menu + OK for 5 seconds) and select Shutter Calibration.

Replacement of curtains on Xiaomi Mi TVs

On TVs, the process is more complicated because of the adhesive attachment. Consider the Mi TV Q2 75:

1. Front panel detachment: Heat the screen edge with a hair dryer (no higher than 60°C) to soften the adhesive. Put a plastic blade in the gap between the panel and the body and guide it gently around the perimeter. Hold the panel -- it could suddenly move away!
2. Under the panel, you'll find 2 plumes, one going to the curtain, one going to the sensors, unplug them by taking a picture of the location beforehand. The curtain plume is usually marked in red.
3. Removal of the mechanism: The curtain is attached to 2 screws T6 and double-sided tape. Carefully put the mechanism with a spatula, disconnect the power from the motor (J4 connector on the board).
4. Installation of new curtain: Stick a new curtain onto a double-sided tape (use the original 3M VHB or similar). Connect the plumes and check the operation with the Power button on the remote.

⚠️ Attention: On Xiaomi TVs, the curtain is synchronized with the cooling system. If after replacing the fans started working at maximum speed, then the curtain sensor is not recognized.

5 Common Mistakes and How to Avoid Them

Even with a careful replacement, you can make mistakes that lead to new problems.

• 🔌 Misconnection of the plume - if you mix the sides, the curtain will move backwards or not respond to commands. Solution: there is a mark on the plume (red line or triangle) that must match the mark on the connector.
• 🔧 Tug screws -- plastic curtain attachments are fragile, and when you push them too hard, they burst, and the mechanism starts to hang around. Solution: use a screwdriver with a torque limiter (up to 0.5 Nm).
• 🧹 Dust gets into the machine — if you don't clean the guides before you put a new curtain in, it wears out quickly. Solution: blow the machine with compressed air and wipe it with alcohol.
• 🔄 No calibration - after replacing the curtain, the solution may not close until the end.Solution: perform the calibration through the service menu (see spoiler above).

💡

If you swing the curtain after you change, apply a drop of silicone lubricant (like WD-40 Specialist) to the plastic gears. Don't use oil lubricants, they attract dust!

Alternative solutions: repair instead of replacement

If the curtain is jammed but the mechanism isn't broken, you can try to repair it, which is true for devices that are hard to find parts for (for example, the old Mi Projector 1 models).

What can be done:

• 🧴 Clean and lubricate: Disassemble the mechanism, remove the old lubricant with a cotton swab with isopropyl alcohol. Apply the new lubricant on the gears and guides. Liquid Moly Silicon-Fett or analogues will do.
• 🔧 Replacement of gears: In 60% of cases, the problem is worn-out plastic gears, which can be ordered separately (see the article of the mechanism) or printed on the machine. 3D-printer PLA-plastic.
• 🔌 Train repair: If the curtain does not respond to commands but moves smoothly by hand, the problem may be a plume cliff. Carefully clean the contacts with a stationery knife and restore the connection with conductive glue (e.g. Permatex).

💡

Repair curtains will cost 3-5 times cheaper than replacement, but does not guarantee durability. If the device is warranty, it is better to contact the service center - self-repair cancels the warranty.

7 Where to order a replacement if you do not want to do it yourself

If you're unsure of your abilities or afraid of damaging the device, consult a professional.

Before choosing a service, check:

• 📄 Availability of a license for electronic repair (for official centers).
• ⭐ Rating and reviews on independent sites (Yandex.Maps, Google).
• 🔧 Work guarantee (minimum 3 months).

FAQ: Frequent questions about replacing the curtain with Xiaomi