How to Disassemble Xiaomi Redmi 8A: detailed instructions with photos and warnings

Xiaomi Redmi 8A — One of the most popular budget smartphones, but even it's not immune to breakdowns. Does the screen react to touch? Is the battery swelling? Does the speaker stop working? Most repairs start with disassembling the device. However, improper dismantling can turn a minor malfunction into a complete failure of the phone.

This article will help you to understand Redmi. 8A We'll go through every step of the way, from tool preparation to motherboard removal, and point out the critical moments where most newcomers make fatal mistakes. If you have never held a screwdriver for your phone, we advise you to first read the frequent questions at the end of the article.

Important: Xiaomi Redmi 8A (codenamed olivelite, it has disposable case latches and a glue layer underneath the battery, which means that once dismantled, the phone won't be as leaky as the factory. Ready for that.

Preparation: Tools and Conditions for Safe Disassembly

The first rule of successful repairs is the right tools. 8A You'll need it:

• 🔧 Plastic mediator (or guitar) to disengage the body. Metal blades scratch the plastic!
• ⚙️ Cross screwdriver PH00 (magnetic) - for the screws of the body. PH0 If you don't, you'll tear the slats.
• 🔋 Suction (diameter) 3-4 (cm) - for screen removal (if required) - alternative is a thin plastic card.
• 🧲 Magnetic mat or container - to avoid losing screws. 8A 12 of them, and they're all different!
• 🔥 Dryer or thermo-air station - to soften the glue under the battery (temperature) 60-70°C).
• 🧴 Isopropyl alcohol 90%+ — Cleaning contacts and removing glue residues.

Also prepare the workplace:

• 📱 Clean, flat surface (preferably antistatic mat).
• 💡 Good lighting – preferably a table lamp with a magnifying glass.
• 📸 The camera of the phone -- take pictures of every step of the way -- it'll save you if you forget how it was assembled.

⚠️ Warning: Do not work on a carpet or couch - static electricity can damage the motherboard. Also avoid wet spaces: even a drop of water on the contacts = short-circuit.

If you don’t have experience, practice on a non-working phone or watch Redmi video disassembly. 8A Youtube, Fixez or Repair Universe, and note that the battery plume in this model is attached to the body, not the board, making it difficult to dismantle.

Step 1: Removing the back cover - how not to break the latches

Redmi Corps 8A It's held on 12 latches around the perimeter and the adhesive layer, and the first mistake of the newcomers is to try to fit the lid on the side, so you'll only break the plastic latches!

The correct algorithm:

1. Turn off the phone and remove the tray for SIM-cards (use a paper clip or special key).
2. Heat the hair dryer back cover around the perimeter (30-40 seconds, temperature 50-60°C. This will soften the glue.
3. Insert the plastic mediator into the gap between the case and the screen from the lower left corner (near the connector). USB-C).
4. Carefully drive the mediator along the body, alternately snapping the locks. When resisting, do not push harder, you better warm up the place again.

Tough moments:

• 🔊 In the upper part of the body (near the camera), the latches are the most fragile.
• 📶 The antenna contacts (metallic strips on the sides) are often glued to the lid. Don't force them torn off, then you have to glue them back.

⚠️ Warning: If the lid doesn't lend itself, don't use force! 80 percent of the time, it means you missed the latch or didn't warm up enough.

Checked that the phone's off.

Removed the tray SIM-map

Prepared a plastic mediator and hair dryer

Heated the hull around the perimeter (50-60°C)

Started at the bottom left corner.-->

Step 2: Shutting down the battery – why do you need to do it first?

Once the lid is removed, your first step is to turn off the battery. It's not just a recommendation, it's a rule of thumb. Why?

• ⚡ Even a phone that's turned off has residual voltage on the board. = burnt-out.
• 🔧 Accidental touch of plumes with a screwdriver can damage the power controller.
• 🔋 At Redmi. 8A The battery is glued, and its accidental displacement can break the contacts.

Instructions for unsetting:

1. Find the battery plume - it is located at the bottom of the board, next to the connector. USB-C. Black plume with orange or red marker.
2. Carefully put the jack on a plastic spatula.
3. After turning off, check the voltage at the battery contacts with a multimeter (should be 0V).

Important: at Redmi 8A The battery plume is glued to the body, not the board, which means that when you remove the battery, you need to carefully peel it off so that you don't break it.

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If you don’t have a multimeter, wait. 5-10 minutes after the battery is turned off - this is enough to discharge the capacitors on the board.

Step 3: Dismantling the motherboard – where the “traps” are hidden

Now we can start removing the motherboard. 8A It's mounted on 8 screws (of different lengths!) and one hidden lock under the battery:

1. Unscrew all screws (use a magnetic screwdriver). PH00). Location: 2 screws under metal protection of the chamber 4 screws at the corners of the board 1 screw next to the charging connector 1 screw under the battery plume (you will have to lift it)

• 📷 Main camera plume
• 🔊 Dynamic plume
• 📶 The antenna module plume
• 🔋 Charging connector plume (orange)
• Carefully tuck the board on the left side (near the volume buttons) and raise it at an angle of 30°. Don’t pull upwards – first check if all plumes are disconnected!

Difficulties you may face:

• 🧲 The screw under the battery plume often "hidden." If the charge fails, check if you've forgotten it.
• 🔌 The charging connector is soldered to the board, but its plume may interfere. Don't pull it, you'd better unplug it completely.
• 📱 There's a vibrating module underneath the board, and it's not screwed, but it can fall out when you flip the phone over.

⚠️ Attention: At Redmi 8A The power button plume is separate from the main board and glued to the middle frame. When you remove the board, it is easy to tear it off.

Step 4: Removing the battery – how not to start a fire

Battery at Redmi 8A — It's glued to a high-strength double-sided tape, and it needs to be taken care to dismantle it, and the main danger is damage to the battery, which could lead to fire or explosion.

Step-by-step:

1. Warm up the battery with a hair dryer (temperature) 60-70°C) during 1-2 Keep the hair dryer at a distance. 5-7 see to keep it from overheating.
2. Put a plastic blade on the battery from any angle (where the glue has already softened).
3. Carefully pull the black film (traction strap) that is under the battery. If it is not, use a thin plastic card.
4. If the battery fails, reheat it and add isopropyl alcohol to the edge (it dissolves the glue).

What can't be done:

• 🔥 Puncture or press on the battery - the risk of short circuit.
• 🔪 Use a knife or sharp objects – you can pierce the battery.
• 🔋 Break off the battery without heating - break contacts or damage the body.

After you take off the battery, check it for bloating. If the battery is deformed, it can't be reset - only recycling! 8A branded batteries BM41 or BM47 (5,000mAh capacity).

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Never throw an old battery in the trash! Lithium batteries should be disposed of at special reception points (e.g., in communication salons or electronics stores).

Step 5: Disassemble the screen when it’s really necessary

In most cases, take apart the Redmi screen. 8A You don't have to take off the motherboard, but if you have to replace the display module, the touchscreen, the plume, you have to go further.

Features of the Redmi screen 8A:

• 📱 The display is glued around the perimeter, the glue is very durable.
• 🔧 Screen and touchscreen plumes go separately and are attached to the board with latches.
• 💡 Illumination (LED-tape) is located at the bottom of the screen - it is easy to damage.

Procedure:

1. Warm up the screen with a hair dryer (temperature) 70°C) at the edges during 2-3 minute.
2. Suction stick to the bottom of the screen (near the Home button) and pull up.
3. Insert plastic mediators into the resulting gap (2-3 squirts) and carefully guide them on the sides.
4. After separation of the screen, turn off the plumes: White connector - display plume Black connector - touch screen plume

Important: at Redmi 8A The home button plume (if physical) goes separately and attaches to the middle frame. When you take it off, it's easy to pull it off -- pay attention!

⚠️ Attention: If the screen cracks, put Scotch tape on it before heating! This will prevent the fragments from crumbled and protect you from cuts. Also use gloves and safety glasses.

Building a phone: how to avoid mistakes

Put together Redmi. 8A It's often harder to reverse than to make sense of:

• 🔧 The screws must be twisted in the same order! at Redmi 8A there are screws of different lengths: 4 short - for fastening the board to the body 2 long - for metal protection of the camera 1 the longest - next to the connector USB-C
• 📶 The plumes must be connected to the end (you'll hear the snap of the latch). Check: Battery plume (orange connector) Camera plume (black) Dynamic plume (white)
• 🔋 The battery should be flat, without skewing, and if it's walking, check if there's any old glue left.
• 📱 Stick the screen gradually, starting at one corner. Use a new double-sided tape (e.g., adhesive tape, 3M 9448A).

Before final assembly:

1. Connect the battery and check if the phone is switched on.
2. Call the speaker, microphone, camera, and sensors (use test apps like Phone Tester).
3. Make sure all buttons are working (volume, power).

If something's not working, don't pack your phone completely! Deal with the problem in the "semi-assembly" phase.

• Bad contact of plumes (check to see if they are fully inserted).
• Damaged battery (if the phone is not turned on).
• Disconnected antenna contacts (no network or Wi-Fi).

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If the phone overheats or discharges quickly after assembly, you probably have damaged the heat paste on the processor, in which case you need to disassemble the device again and apply a new paste (for example, Arctic). MX-4).

Frequent questions about the dismantling of Xiaomi Redmi 8A