Disassembly Xiaomi 8T: Detailed guide for self-repair

Xiaomi Smartphone 8T (The codename platina remains popular among users due to its balanced characteristics, but even such a reliable device requires repair over time, whether it is a battery replacement, dust cleaning, restoration of the charging connector or diagnostics of internal components - disassembly. The first and most important step is the body, unlike the flagship models with adhesive joints, 8T It has a relatively repairable design, but there are nuances that can turn a simple procedure into a nightmare for a beginner.

In this article you will find a step-by-step instruction with a photo, a list of necessary tools, as well as critical warnings that will help to avoid typical errors - from damage to plumes to loss of tightness. We will discuss both the classic disassembly for replacing the battery, and more complex scenarios (for example, access to the motherboard). 8T from other models in the series (for example, 8 Lite or 8 Pro), where the location of mounts and connectors may differ.

If you've never taken a smartphone apart before, don't rush to grab the tools. 80 percent of self-disassembly breaks involve improperly removing the back cover or damaging the flexible plumes of the fingerprint scanner. Read the article to the end, assess your strength, and then get to work.

Preparation for disassembly: tools and security measures

Before we start to disassemble Xiaomi 8T, Make sure you have everything you need, and the wrong tools are the main cause of chipped body, screws torn, and plumes torn:

• 🔧 Torx bit screwdriver set T3, Torx T4, Phillips PH00 and Y00 (The last one is for some screws under the battery).
• 📱 Plastic mediators or shoulder blades (metallic can scratch the body).
• 🔥 Dryer or thermo-air station (to soften the glue under the back cover).
• 🧲 Magnetic mat or screw container (so as not to lose small details).
• 🔋 Captone tape or tape (for battery isolation after disconnection).
• 📸 Smartphone for shooting the process (to fix the location of the parts before disassembly).

Note that not all screwdriver sets are the same. Cheap Chinese bits often lick when trying to unscrew vandalism-proof screws (as in Xiaomi). If you plan to repair equipment regularly, invest in quality tools (for example, from iFixit or Wera).

⚠️ Note: If you understand Xiaomi 8T If you want to replace the battery, don't use metal objects to slap the lid, because there are antenna tracks underneath that are easily damaged. Also, avoid overheating the body with a hair dryer: temperatures above 80.°C can deform plastic clips.

Before starting work, be sure to follow the following steps:

Removal of the back cover: technique and typical errors

Xiaomi's back cover 8T It is mounted on 16 screws (8 on each side) and adhesive layer around the perimeter, unlike newer models (e.g. Xiaomi). 11T), There is no liquid crystal glue, but this does not make the process easier - plastic clips easily break when sloppy removal.

Algorithm of action:

1. Unscrew all Torx screws T3 around the perimeter of the lid (do not confuse them with screws under the battery!).
2. Carefully warm the edges of the body with a hairdryer (temperature) 60-70°C) during 1-2 minutes to soften the glue.
3. Insert the plastic mediator into the gap between the lid and the frame (start with the lower left corner where the charging connector is located).
4. Keep the mediator smoothly along the body, separating the clips. Don't force it -- if the lid doesn't respond, warm it up again.

The most vulnerable places when removing the cover:

• 📍 Upper part (near the camera) - there are antenna tracks.
• 📍 Lower right corner – clips often break due to close location to the power button.
• 📍 Area around fingerprint scanner – plume can break off when moving sharply.

⚠️ Warning: If you see the fingerprint scanner plume ripped off after you take off the cover, don't panic. You can solder it back, but it will require a soldering station and microelectronics experience. In 90% of cases, self-repair of such a plume leads to the inoperability of the sensor.

After removing the lid, do not put it on the table "face" down - the camera glass may scratch.

Disconnection of the battery and work with plumes

After removing the back cover, the first thing to do is to turn off the battery to avoid short circuit. 8T The battery connector is located at the bottom of the motherboard and closed with a black protective tape.

Procedure:

1. Carefully put the protective tape over the battery connector (use a plastic shoulder blade).
2. Unplug the connector with the same spatula, pulling it on the side.
3. Close the connector with tape so that you do not accidentally close the contacts during further disassembly.

Now you can start turning off the other plumes. 8T There are only 5:

Critical mistake of beginners: trying to turn off the plumes without first removing the metal protective plates. 8T plates are mounted on screws Y00 and PH00 — If you don’t pull them off, you risk breaking the plumes when you climb.

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If the plume is stuck to the connector, do not try to pull it out by force.°C) and gently swing the shoulder blade on both sides.

Withdrawal of the motherboard: nuances and risks

Access to Xiaomi motherboard 8T It's complicated by the fact that it's not only attached to screws, but it's also attached to double-sided tape in several places, and there's antenna wires underneath the board that are easy to pull off.

To safely extract the fee:

1. Unscrew all screws around the perimeter (use a magnetic screwdriver to avoid losing them).
2. Carefully tuck the board with a plastic spatula from the bottom edge (from the charging connector).
3. Check if the board is clinging to the antenna wires at the top, and if necessary, disconnect them.
4. Raise the charge at an angle 30-45° And look at the bottom side -- there may be some scotch left over.

The most vulnerable elements on the board:

• 🔌 Power connector - often comes off with careless extraction.
• 📡 Antenna contacts (upper) – if damaged, the network signal will deteriorate.
• 🔋 Capacitors near the processor – you can not touch them with metal tools.

⚠️ Note: If you understand Xiaomi 8T If you want to replace the charging connector, don't be in a hurry to solder the new one right away. First, check the integrity of the tracks on the board with a multimeter, and often the problem is not the connector, but the cliff of the contacts.

Once the board is removed, don't put it on metal surfaces, which can cause static electricity. Use an antistatic mat or at least regular paper.

Battery Replacement: A Step-by-Step Guide

Battery in Xiaomi 8T has a capacity of 3400 mAh (model) BM4D) It's a high-strength double-sided tape, and it's going to require not only a new battery, but also a special glue to replace it, B-7000 or Tesa 61396).

Replacement algorithm:

1. Turn off the old battery (as described in the previous section).
2. Put a plastic blade on the bottom of the battery. Don't use metal tools!
3. If the battery does not respond, warm the case with a hairdryer (70-80°C) and pull on the special "ears" (if any).
4. After extraction, clean the seat from glue residues with alcohol or acetone.
5. Apply the new glue to the back of the battery (thin layer, no excess).
6. Set the battery in place and press it tightly on 1-2 minute.

Important points:

• 🔋 The new battery must be original or from a proven manufacturer (e.g. Patona.
• 🔌 After replacement, be sure to check the voltage with a multimeter (should be ~3.8V).
• 📱 The first power-up can take up to 5 minutes – this is normal for a new battery.

If the smartphone does not turn on or discharges quickly after replacement, check:

• Correct connection of the battery plume.
• Integrity of contacts on the board (possibly broke off when removing the old battery).
• Energy saving settings in MIUI (Sometimes reset after the battery is turned off).

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Replacement of the battery in Xiaomi 8T without special glue will lead to its displacement inside the body and possible damage to the plumes when vibrating or falling.

Build a smartphone: reverse order and testing

Assembling Xiaomi 8T It should be in reverse order, but with a few critical points in mind:

1. Before installing the back cover, check the operation of all components: 📵 Network (call, mobile Internet). 🔊 Sound (dynamic, microphone). 📷 Camera and fingerprint scanner. 🔋 Charging (check and wireless if supported).

all the plumes are tightly connected

cross-over

Warm up the edges of the lid with a hair dryer (50-60°C) and press firmly on 1-2 minutes for better glue.

Typical problems after assembly and their solution:

If you have any extraneous sounds (squeaking, crunch) after assembly, it's likely that one of the clips of the back cover has broken or the cover is not tightly attached, in which case you'll have to repeat the disassembly and check the integrity of the attachments.

Frequent Mistakes and How to Avoid Them

Even experienced masters sometimes make mistakes when disassembling Xiaomi 8T. Here are the most common ones and how to prevent them:

• 🔧 Thrown screws - use high-quality screwdrivers and do not apply excessive force. If the screw does not work, try to drip WD-40.
• 🔥 Overheating of the body – do not keep the hair dryer in one place longer 10 - Optimum temperature — 60-70°C.
• 📱 Trail damage – always pull the connectors from the side, rather than pulling the wires.
• 🔋 Short circuit – before working with the board, touch the grounded object to remove static electricity.
• 🧲 Loss of screws – use a magnetic mat or cell container to sort.

Pay special attention to the battery. If it swells, do not puncture it in any case, it can lead to fire.

1. Carefully remove without deforming.
2. Place in a non-combustible container (for example, a metal jar).
3. Dispose of it at a special reception point.

⚠️ Warning: If you smell a strong chemical odor during the disassembly, it is a sign of an electrolyte leak from the battery. Stop working immediately, ventilate the room and wash your hands. Contact with the electrolyte can cause burns!

If you are not sure of your abilities, it is better to contact the service.The cost of dismantling Xiaomi 8T In the workshops, it usually does not exceed 1000-1500 RUB, which is cheaper than repair after an unsuccessful independent attempt.

FAQ: Answers to popular questions