The broken glass of the main camera on the Xiaomi Redmi Note 9 Pro is not only an aesthetic problem, but also a direct threat to the functionality of the module. Cracks can spread, interfere with focus, and small fragments can scratch the matrix itself or lenses. Unlike older models, where glass was part of the body, here it is integrated into a separate element that requires careful intervention.
The replacement process is not easy, because the back cover of the smartphone is glued around the perimeter, and the camera module itself is hidden under glass, which also has adhesive base. The risk of damaging the plume or breaking the inside of the glass in a careless dismantling is quite high. However, with the necessary tools at hand and observing the technology, you can restore the tightness and appearance of the device at home.
In this article, we will discuss in detail the process of preparing, dismantling an old part and installing a new glass. We will focus on methods of cleaning from dust, as any villi on the inside of the glass will turn into a black spot in all your photos. The quality of work directly affects the final result of the shooting.
Diagnostics of damage and preparation of tools
Before any manipulations, you need to make sure that it is the protective glass that is damaged, not the lenses of the camera module. If you look through the magnifier you see that the optics itself cracked inside, then replacing the external glass will not help - you will need to replace the entire camera module. In the case where only the upper glass is broken, the recovery procedure is quite real and economically feasible.
To do a quality repair, you need a specific toolkit that is different from the standard battery or screen replacement kit. The main challenge is accessing the glass through the back cover or having to remove it. Most craftsmen recommend removing the back cover completely to have direct access and control over the process.
- 🔧 Heating tool (dryer or heating pad) for softening glue.
- 💳 Plastic cards or mediators for opening the body.
- 🔍 A magnifying glass or microscope to examine internal components.
- 🧹 Microfibre and liquid for optics cleaning.
⚠️ Note: Using a metal scalpel or knife to pluck a lid or glass is strictly prohibited.One wrong move can cause a battery puncture or damage to the plumes, which will bring the smartphone out of action completely.
It's also critical to have a clean workplace, because dust is the biggest enemy when you replace the glass in your camera, and if you get a speck of dust under the glass, you'll see an artifact in your photos that you can only remove by re-assembling, and the organization of space and good lighting is the key to success.
The process of disassembling the smartphone Redmi Note 9 Pro
Start by turning off the device and retrieving it. SIM-Redmi Note back cover 9 The Pro is made of glass and glued around the perimeter with a special adhesive compound, and to remove it, you need to warm up the edges of the body evenly. Use a hair dryer, setting the temperature near the end of the body. 80-90 and warm the perimeter during the 2-3 Do not hold the hair dryer in one point for too long so as not to damage the display on the back.
After warming up, insert the suction cup into the bottom of the back cover and pull up slightly, creating a gap. Insert a plastic card or mediator into the resulting gap, guide the tool along the edges, gradually cutting through the glue layer. Be especially careful in the corners and in the area of the fingerprint scanner where the plumes are located.
When the lid is removed, the insides are accessed. However, the glass of the main camera is under the protective frame or directly on the module, and often it is glued to the inside of the back cover or to the middle frame. In the case of the Xiaomi Redmi Note 9 Pro, the glass of the main quadro camera is often part of the structure glued to the frame around the modules.
- 🔩 Unscrew all visible screws around the perimeter of the middle frame.
- 🔌 Disconnect the battery plume before working with other components.
- 📸 Carefully remove protective plastic slats over camera modules.
⚠️ Attention: The main camera plume is very thin and fragile. When removing the protective slats or lids, there is a high risk of hooking and tearing the connector. Always turn off the battery before any manipulation of the plumes.
☑️ Checklist before glass removal
Dismantling old glass and cleaning the module
The most important step is to remove the broken glass, which can be glued to a metal frame around the lenses, to soften the adhesive, carefully warm the area of the camera with a hairdryer, do not direct hot air directly into the lenses of the cameras, so as not to damage the optical stabilizer (OIS) or the adhesive structure inside the modules.
Using a thin tweezer or needle, you can pull the edge of the glass. Try to remove it whole, but if it splits into small pieces, remove them one by one, trying not to drop the fragments inside the case. Once the glass is removed, there will be a layer of old glue on the frame. It must be removed completely using isopropyl alcohol and a plastic blade.
Cleaning the camera lenses themselves is critical. Even the microscopic dust will become visible in the high-resolution photo. Use a pear to blow out the dust, and then wipe the lenses with a special napkin for optics dipped in the cleaning solution. The movements should be light, without strong pressure.
| Phase | Tool. | Risk | Time. |
|---|---|---|---|
| Heating. | Hair dryer (80°C) | Overheating of the display | 2-3 minutes |
| Glue removal | Alcohol, spatula. | Getting into a cell | 5-10 minutes |
| Cleaning the lenses | Pear, napkin. | Scratches on optics | 2-3 minutes |
Installation of new glass and sealing
The new glass for the Redmi Note 9 Pro usually comes with a layer of adhesive already applied, protected by film. Before installing, make sure the frame surface is perfectly clean and fat-free. Remove the protective film from the adhesive layer, trying not to touch the glue itself with your fingers, as greasy marks will worsen adhesion.
Carefully place the glass on the landing site, aligning it around the edges of the frame. Easy press your fingers around the perimeter for primary fixation. It is important to avoid skewing, otherwise the glass will protrude or, conversely, create a gap where the dust will be stuffed. Make sure that no villi fall under the glass at the time of gluing.
For final fixation and sealing, it is recommended to use a special electronics adhesive (e.g., B-7000 or T-7000) if the new glass does not have a self-adhesive base. Apply the thinnest layer of glue around the perimeter. Extra glue can be removed after partial drying by rolling it with your finger.
- 🧪 Degrease the surface of the frame with alcohol before sticking.
- 🖐️ Press the glass evenly around the perimeter.
- ⏳ Let the glue dry during 1-2 preassembly.
Assembly of the device and check of performance
Once the glass is installed and the glue is grasped, you can start to reverse assemble. Put all the safety strips in place and screw the screws. Keep the screws in order, because they can be of different lengths. Returning to the battery plume is one of the last steps before closing the lid.
The back cover also needs to be cleaned of the residue of old glue. Apply a new layer of adhesive (B-7000 or special glue for screens) around the perimeter of the frame of the case. Set the lid, press tightly and lock with rubber bands for 30-60 minutes. Don't turn the phone on immediately, let the glue gain strength.
The first run is to show the results. Turn on the camera and check all the modules: main, wide-angle, macro and telephoto lens. Take test shots of a white sheet of paper in good light, which will help to detect dust if it does get inside. Check autofocus and zoom.
⚠️ Attention: If the camera focuses indefinitely after assembly or makes clicks, it is possible that the camera plume is damaged or not fully inserted into the connector.
Common Mistakes and How to Avoid Them
One of the most common mistakes is not cleaning the glue properly, leaving the glass uneven enough to lie tight, causing it to re-unhook off or get dust, and users often forget to turn off the battery, which can lead to short circuits when the plume accidentally touches metal parts.
Using the wrong adhesive, like superglue ("Moment"), is a fatal mistake. Cyanacrylate vapors settle on the camera's lenses, creating a whitish film that's almost impossible to remove. The camera starts shooting "in the fog." Use only specialized adhesives for electronics.
Another mistake is ignoring the camera check before it is fully assembled, making sure the camera is working, the plumes are connected and the image is clean before finally sealing the back cover, which will save you time to re-disassemble if defects are detected.