How to disassemble Xiaomi Redmi 9: detailed instructions with photos and nuances

Xiaomi Redmi 9 is one of the most popular budget smartphones, but even it is not immune to breakdowns. Screen with cracks, bloated battery or a broken camera are common reasons why users decide to repair themselves. However, disassembling the phone requires accuracy and knowledge of the design features of the model. In this article, you will find a step-by-step photo instruction, a list of necessary tools, and tips on how to avoid typical mistakes when disassembling Redmi 9.

The Redmi 9 (codenamed lancelot) has a classic design with a non-removable back cover, a glued battery and modular arrangement of components, which makes it easier to access most parts, but requires caution when working with plumes and connectors. If you have never taken smartphones apart before, we recommend that you first familiarize yourself with the general rules for electronics repair, which will save time and nerves.

Preparation for disassembly: tools and security measures

Before you start disassembling, make sure you have everything you need, and using the wrong tools is the main cause of damage to the body or internal components, and here is the minimum set you'll need:

• 🔧 Plastic blades (mediators) - for separation of the back cover and smearing of plumes.
• ⚡ Screwdriver cross (PH00) — for the screws of the body and the fastening of the motherboard.
• 🔋 Suction - helps to carefully remove the screen or back cover.
• 🧲 Magnetic mat or container – to avoid losing small screws.
• 🔥 Hair dryer or thermo-air station - for softening the glue (optional, but useful).
• 📸 Smartphone for photography – fix the location of parts before disassembling.

Important: do not use metal blades or knives – they scratch the body and can close contacts on the board. Also avoid heavy heating (above 80 ° C) to avoid damaging the battery or display. If you disassemble the phone due to fluid intake, pre-dry it in rice or silica gel for at least 24 hours.

⚠️ Warning: Disassembling the phone will void Xiaomi warranty. If your Redmi 9 is still warranty service, contact the service center. Self-repair can lead to permanent damage to the motherboard due to static electricity or improper connection of the plumes.

Step 1: Removing the back cover

The Redmi 9 back cover is glued around the perimeter, so it needs to be carefully separated without damaging the antenna contacts. Start by heating the edge of the body with a hairdryer (temperature ~60-70°C) for 1-2 minutes. This will soften the glue and facilitate the process.

Then proceed as follows:

1. Insert a plastic blade into the gap between the lid and the case (it is better to start at the bottom edge, where the USB-C connector).
2. Carefully drive the blade along the edge, gradually detaching the lid. Don't make any effort -- if the lid doesn't lend itself, warm up the area again.
3. After the edge is separated, put the lid on the suction cup and slowly pull it upwards, and if you hear resistance, check if there are any remaining areas.

At this stage, a mistake is often made: they try to tear the lid off by force, which leads to a break in the fingerprint scanner plume (if it is located under the lid). In Redmi 9, the scanner is integrated into the power button, so the risk is less, but caution will not hurt.

Step 2: Shutting off the battery

When you remove the lid, first of all, turn off the battery, which will prevent short circuits from further disassembly. In Redmi 9, the battery connector is located at the top of the board and is closed with black insulation tape.

To disconnect the battery:

1. Remove the insulating tape from the connector (it can be glued or fixed by a clip).
2. With a plastic spatula, gently pull the connector upwards.
3. Check with a multimeter that there is no voltage on the contacts of the battery (optional, but recommended).

⚠️ Warning: If the battery is blown up (as seen from the deformation of the lid), do not try to pierce or bend it. This can lead to fire.

Step 3: Removing the motherboard

The Redmi 9 motherboard is mounted on multiple screws and connected to other components through plumes, and you need to:

• 📱 Disconnect the display plumes, cameras and power buttons (they are fixed by latches).
• 🔧 Unscrew all screws around the perimeter of the board (usually 8-10 pieces, of different lengths).
• 🧲 Remove the metal screen that protects the board from interference (attached to clips).

Then you can gently push the board over the edge. Don't pull it by the connectors. If the board doesn't go, check if there are unconnected plumes or undetected screws. Redmi 9 often forgets the screw under the battery, it's hidden under a black sticker.

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Before removing the board, take a photo of it from all sides, which will help to connect the plumes correctly when reassembling, especially if the repair took several days.

Step 4: Replace the battery

The battery in Redmi 9 is glued to the body, so replacing it requires patience.

1. Heat the body with a hair dryer (temperature ~70°C) for 2-3 minutes to soften the glue.
2. Carefully tuck the battery into a plastic spatula from one end. Don't use metal tools!
3. Put a thin plastic card or mediator under the battery to gradually separate it from the case.
4. After extraction, clean the body of glue residues with alcohol or acetone.

When installing a new battery, use double-sided tape or special glue (for example, B-7000). Do not allow distortions, this can lead to deformation of the case. Also make sure that the new battery has the same capacity (5020 mAh) and compatible connectors.

Step 5: Disassemble the screen and replace the display

The Redmi 9 screen is made up of several layers: touch glass, display module and metal frame, so if only glass cracks, you can try to replace it separately, but more often you change the entire module.

1. Heat the screen with a hair dryer (temperature ~70°C) around the perimeter for 3-5 minutes.
2. Use a suction cup to lift the screen. Put plastic shoulder blades into the crevices to separate the glue.
3. Disconnect the display plume from the motherboard (it is fixed by a latch).
4. Remove the metal frame that attaches the screen to the body (screws under the lid).

When installing a new screen, make sure the plume is not bent or clamped. Redmi 9 often has a problem with the "yellow spots" on the new display - this is a backlight defect associated with poor-quality assembly. If the spots appear, return the screen to the seller.

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling the Xiaomi Redmi 9.

• 🔌 Damage to plumes in a careless underdog. Always use plastic shoulder blades and peel the latches, not the wires themselves.
• 🔥 Battery heater overheating with a hair dryer. Maximum temperature is 80.°C, otherwise the battery may swell.
• 🔧 Loss of screws. Redmi 9 has screws of different lengths -- if you mix them up, the board can warp.
• 📱 Incorrect screen assembly. If the display doesn't work after you've replaced it, check if the plume is plugged in to the end (the snap of the latch should be heard).

Another common problem is that you have extraneous sounds in the speaker after assembly, which happens when you get dust or glue under the speaker, and to avoid that, clean all the holes with compressed air before you final assemble.

1. battery connection (the connector should sit tight).

2. The state of the plume of the supply (whether there are breaks).

3. screws on the motherboard (whether they shortened the contacts).-->

FAQ: Frequent questions about the dismantling of Xiaomi Redmi 9