Disassembly Xiaomi Mi 8: a complete analysis with photos, schemes and life hacks

Xiaomi Mi 8 is the flagship of 2018, which is still popular due to the powerful “iron” and affordable price in the secondary market. However, over time, even such a reliable device can require repairs: from replacing the battery to cleaning the connectors or recovering from a fall. Disassembly Mi 8 has its own features associated with adhesive mounting of the rear cover, fragile glass body and compact layout of internal components.

This guide will help you disassemble your smartphone yourself without the typical mistakes, and we will take a detailed look at the necessary tools, the steps of dismantling, and also give tips on working with delicate elements such as camera plumes or antenna modules. If you've never disassembled a smartphone, practice on a less valuable device or go to a service center. Mistakes in disassembling the Mi 8 can cause damage. OLED-screen, plume separation or module failure NFC.

This article is aimed at users with basic electronics repair skills, and if you only need to replace the battery or speaker, you can skip some steps, we will specify which ones. Complex operations (such as soldering chips) will require professional equipment.

Preparation for disassembly: tools and security measures

Before you start dismantling the Xiaomi Mi 8, prepare the workspace and tools. Work on a clean, well-lit surface – it is better to use an antistatic mat or at least a table without carpeting (static electricity can damage the motherboard).

Here's what you're gonna need:

• 🔧 Set of screwdrivers (cross-haired) PH00, flat 1.5 mm, five-pointed Y00 logo-screw)
• 🧲 Suction (to remove the back cover) or plastic mediator
• 🔥 Hair dryer or thermo-air station (for softening glue, temperature 60-80)°C)
• 📏 Plastic blades (preferably a set of different thicknesses)
• 🔋 Tweezers (for working with small details and plumes)
• 📦 Containers for screws (so as not to confuse them during assembly)
• 🧴 Isopropyl alcohol (to clean contacts and remove glue residues)

⚠️ Warning: Do not use metal tools to lid the lid - this will lead to glass chips. If you do not have experience with a hair dryer, practice on another device: overheating can deform plastic cells or damage the battery.

Also prepare your smartphone:

• 🔌 Turn off the device and wait for it to cool down completely (if it gets hot).
• 🔋 Discharge the battery to 20-30% – this will reduce the risk of fire in case of accidental damage.
• 📱 Take it down. SIM-card and memory card (if installed).
• 📷 Take a picture of the location of the screws and plumes before disassembly – this will simplify the reverse assembly.

Removing the back cover: the fight against glue and fragile glass

The back cover of the Xiaomi Mi 8 is glued around the perimeter, and also has additional latches in the area of the buttons and the camera. Do not try to remove it without preheating - this will lead to cracks or tearing off the antenna contacts.

1. Heat the edges of the cover with a hair dryer for 1-2 minutes, keeping it at a distance of 5-7 cm The temperature should be comfortable for the hand (not higher than 80).°C).

2. Put a plastic lid on the side where there are no buttons. If you feel resistance, warm up the area again.

3. Carefully drive the blade along the body, separating the glue. Do not apply force - the glass may crack!

4. Remove the cover when the glue is removed around the perimeter. Be careful with antenna plumes - they are glued to the inside of the cover.

⚠️ Warning: If the lid cracked when removed, do not try to glue it with superglue - this will worsen the antenna signal and may damage the internal components: MB12345 For the Mi 8 Standard version).

Critical: In the Mi 8 Explorer Edition, a fingerprint scanner is placed under the glass cover, and don't touch the contacts when disassembling the device, because static electricity can cause the module to fail.

Warm up the edges with a hairdryer (60-80)°C)|Push a plastic spatula from a safe edge|Check for no resistance|Carefully separate antenna plumes from the cover-->

Battery Dismantling: Risks and Safety Rules

The battery in Xiaomi Mi 8 is glued to the body and connected to the motherboard via a connector. Never tear it off by force - it can cause fire or bloating.

1. Turn off the battery connector with a plastic spatula. If it's stuck, gently swing it left and right.

2. Pull the battery from any angle and pull a special black tape (pull-tab). If it is not, use a plastic card, placing it under the battery.

3. Remove the glue residue from the case with isopropyl alcohol. Do not use acetone or solvents!

If the battery is swelling:

• 🚨 Stop disassembling immediately and take the device to the service.
• 🔥 Do not puncture the battery – it can lead to a fire.
• ♻️ Dispose of it in special reception points (bloated batteries can not be thrown into ordinary garbage).

For replacement, the original batteries with an articular will be suitable BM4B (3400mAh capacity or quality analogues from Patona or Baseus. After installing a new battery, be sure to calibrate it: fully charge, then discharge until automatically shut down and recharge to 100%.

Disconnection of plumes and dismantling of the motherboard

The Mi 8 motherboard is mounted on multiple screws and connected to multiple plumes. Before you remove it, turn off all the connectors:

• 📱 Main display plume (the widest, in the center)
• 🔊 Dynamic plumes (upper and lower)
• 📷 Camera plumes (rear and front)
• 📡 Antenna contacts (glued to the cover)
• 🔋 Charging connector (Type-C)

Use a plastic blade or tweezers to turn off the plumes. Don't pull the wires, just the connector! If the plume doesn't move, check if there's a latch (usually white or black).

After the plumes are turned off:

1. Unscrew all the screws that fasten the board (they may differ in length - remember where it was!).
2. Carefully tuck the board from one edge and lift it up. If it doesn't lend itself, check if all the screws are twisted.
3. Put the fee on an antistatic mat or in a special package.

⚠️ Warning: The Mi 8 has a Qualcomm Snapdragon 845 chip that is sensitive to static electricity. Touch the board only by the edges, having previously discharged the static (for example, touching a grounded object).

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If you understand the Mi 8 SE (And the younger model, you know, it's got a different layout of the board, and the plume connectors are mirrored!

Replacement of the display and touch glass: nuances OLED-screen

The Xiaomi Mi 8 screen is the same OLED-It's a panel with an integrated touch layer, and it needs to be very careful to replace it, because it's fragile, and the plume is easily damaged. If there's cracks or broken pixels on the screen, but the sensor works, you can only replace the glass (but it's more expensive and more complicated).

Procedure:

1. Warm up the display module with a hairdryer (temperature 70-80)°C) perimeter.
2. Tap the glass with a plastic blade, starting at the bottom edge (where the connector is located).
3. Carefully separate the glue as you move towards the top, and if the glass is cracked, paste it with tape so that the fragments don't fall apart.
4. Disconnect the display plume from the motherboard.
5. Install a new screen, plug in the plume and check the operability before the final assembly.

When choosing a replacement, pay attention to:

• 🔍 Original article: DM12345 (for Mi 8 Standard or DM67890 (For the Explorer Edition).
• 📏 Size: 6.21 inch, resolution 2248×1080.
• 🔄 Availability of frames: some non-original screens go without adhesive frame - it will have to be purchased separately.

(1) Correct connection of the plume (it must click when fixing).

(2) No damage to the plume (microcracks may not be visible to the naked eye).

3) New screen compatibility with your Mi 8 revision (Chinese and global versions may have different display firmware).-->

To test the screen before the final assembly, you can temporarily connect it to the board and turn on the smartphone in Fastboot mode (keep Volume down). + Power. If there's an image but there's no sensor, the problem is the plume or the connection.

Disassembly of camera and speakers: small details with great risks

The Mi 8 camera module consists of two lenses (main and telephoto) and a depth sensor. When disassembling, don't touch the lenses - fat marks will worsen the quality of the photo. If you need to change the camera, act like this:

1 Unscrew the screws that fasten the metal frame of the module.

2. Gently gently slap the frame and remove it. Be careful - there may be small springs under it (for autofocus).

3. Disconnect the camera plumes from the motherboard. They're very fragile, so you'd better use tweezers.

4. Remove the module and install a new one. Make sure the sealing gums are in place (they protect against dust).

The speakers in the Mi 8 are located in the lower and upper parts of the body, the lower speaker is more likely to fail due to moisture or dust.

• Unscrew the mount screws.
• Turn off the plume (it can be glued - gently dent it).
• Remove the speaker and install a new one, making sure the membrane does not touch the body.

If the sound is hoarse or absent after the speaker is replaced, check:

• 🔊 Correct connection of the plume (reconnect it).
• 🛠️ Membrane integrity (damage may not be visible).
• 📱 Phone sound settings (sometimes resetting to factory settings helps).

Smartphone Builder: How to Avoid Mistakes

Building the Xiaomi Mi 8 after disassembly requires as much care as dismantling. Follow the reverse order, but consider a few key points:

1. Posture glue: Use a new double-sided scotch (e.g, 3M 9448A) liquid-glue B-7000. Apply it in a thin layer, avoiding hitting antenna plumes.

2.Strotters: Twisted them cross-to-cross to avoid board skews.Don't put too much force on - the thread in the Mi 8 body is pretty soft.

3.Steams: Before fixing the connector, make sure that the plume is flat in the groove. It should snap with a slight click.

4.Testing: After assembly, check:

• 🔋 Charging (connect the cable and make sure the charge is coming).
• 📶 Network Signal and Wi-Fi (Antennas must be connected correctly).
• 📷 The camera operation (take test pictures).
• 🔊 Sound in speakers and microphone.

⚠️ Warning: If the smartphone doesn't turn on after assembly, don't panic. First check: Battery connection (sometimes the connector leaves when assembly) Power button (it could shift or jam). Short circuit (try to turn off the board and inspect it for foreign objects). If the problem remains, disassemble the device and repeat the assembly, paying attention to each step.

UV adhesives can be used to seal the case, but this will make the next disassembly more difficult, and if you plan to open your smartphone frequently (for example, for experiments), you should use duct tape.

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After the assembly, be sure to reset the settings (Settings). → Additionally. → Recovery and resetting: This will help to avoid software failures associated with disabling components during repairs.

FAQ: Frequent questions about the dismantling of Xiaomi Mi 8