Disassembly Xiaomi Redmi 5 Pro: a detailed guide with photos and expert advice

Xiaomi Redmi 5 Pro (codenamed vinci) remains a popular device among users, despite the release of newer models, and may need to be disassembled to replace the battery, repair the display, clean up the dust or recover from a fall. However, the design of a monolithic case with adhesive attachments makes the process more difficult than the models with a removable back cover.

In this article, you'll find a step-by-step guide that takes everything from tool preparation to reassembly, and we'll look at common mistakes that cause damage to plumes or sensors, and we'll give you some recommendations on how to choose parts. If you've never taken a smartphone apart, don't worry: with the right approach, even a beginner can do it in 30 to 40 minutes.

⚠️ Critical warning: Redmi 5 Pro has a fragile fingerprint scanner plume that attaches to the middle frame. Its cliff is the most common cause of a broken sensor after disassembly. If you are not sure of your skills, you should contact the service center.

Before starting work, be sure to turn off your phone and wait for the battery to run out of power (up to 0.5%) – this minimizes the risk of short circuits in accidental contact with the board. Also prepare the workplace: it should be well lit, without carpeting (to avoid losing small screws) and with antistatic coating (for example, silicone mat).

1. Necessary tools and materials

To disassemble the Xiaomi Redmi 5 Pro, you will need a specialized set of tools. Don’t try to do with the tools at hand, it is almost guaranteed to damage the body or internal components.

• 🔧 Plastic mediators (2-3 pieces) to separate adhesive joints. Metal tools will leave scratches!
• ⚙️ Screwdriver kit: cross-haired PH00 and PH0, and the five-point Pentalobe. P2 speaker-screw.
• 🔥 Dryer or thermo-air station - for softening the glue (temperature 60-80)°C) Do not use a household hair dryer at maximum power!
• 🧲 Magnetic mat or tray - so as not to lose screws (there are more than 20 pieces of different sizes!).
• 🔋 Suction cup (2-3 pcs) - to raise the display module, it is better to use small ones (diameter 3-4 cm).
• 🧴 Isopropyl alcohol (90%+) — Removing glue residues and cleaning contacts.
• 📦 New glue (bilateral scotch or liquid glue) B-7000) — The original Xiaomi glue is disposable.

If you are planning to replace the battery, prepare:

• 🔋 New battery with a capacity of 4000 mAh (original article: MBJ404740). Check for thermosensor!
• 🔌 Multimeter - to check the voltage at the terminals (must be 3.7–4.2V).

⚠️ Warning: Don't buy cheap batteries without a thermal sensor -- they can swell or disable the power controller. Original parts cost more, but last 2-3 years without problems.

2. Preparation of the telephone for disassembly

Before you start disassembling, follow a few critical steps:

1. Back up your data. Even if you don't plan to touch the board, there's always a risk of damage. Use Mi Cloud or Google Drive to sync your contacts, photos and apps.
2. Extract. SIM-The box is on the left side (if you look at the screen) and use a paper clip or a special key.
3. Charging up to 5-10%: A fully discharged battery can "sleep" and show no signs of life after assembly.
4. Check the integrity of the case. If there are cracks on the back cover, they can expand when heated.

We also recommend taking a picture of the phone from all sides, which will help you to correctly orient the parts during the assembly, paying special attention to the location of the microphones, speaker and antenna lines.

Removal of the back cover: technique and nuances

The Redmi 5 Pro's back cover is glued around the perimeter and holds on 15 latches.

1. Heat the edges of the body with a hair dryer for 2-3 minutes, keeping it at a distance of 5-7 cm Do not overheat - the temperature is above 80°C can damage plastic!
2. Place the suction cup closer to the lower edge (where the connector is) USB-C) And pull it up a little bit. If the lid doesn't lend itself, repeat the heat.
3. Insert a plastic mediator into the gap and carefully steer it along the edge, separating the glue. Do not use metal tools!
4. Pay special attention to the corners, there are latches, put a little more effort, but without jerking.

⚠️ Warning: If the lid doesn't lend itself, don't pull it any harder -- you can tear off the fingerprint scanner plume that's attached to the middle frame.

After removing the cover, you will see:

• 🔋 Battery with black protective film (do not remove it without needing to be used!).
• 📱 Medium frame with soldered antenna contacts.
• 🔊 The speaker and microphone at the bottom.
• 📷 Double-module camera (12 MP) + 5 MP).

4. Battery disconnection and motherboard removal

Before you touch the board, be sure to turn off the battery!

1. Carefully put the black battery connector on the plastic mediator.
2. Check the multimeter voltage on the contacts of the board - it should be 0V.

Now you can start to extract the motherboard:

1. Unscrew all the screws (there are 12 of different lengths) and remember the location of each one, it's important to not confuse them when you build them.
2. Disconnect all plumes: 📞 Display plume (upper part). 🔍 Fingerprint scanner plume (very fragile!). 🔊 Dynamics and microphone plume. 📷 Camera plume (latch attachment).

Put a plastic blade on the board and gently lift it. Don't pull the edges, you can tear the contact pads off!

⚠️ Note: Redmi 5 Pro board has an eMMC memory chip (model) H9HKNNN8JMACXR), It's sensitive to static electricity, touch the board only at the edges, before discharging the static (for example, touching a grounded object).

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If the screws are "stiff" and do not twist, drop a little isopropyl alcohol on them and wait 1-2 minutes. This will help dissolve the oxides without damaging the thread.

5. Battery replacement: a step-by-step process

The battery in the Redmi 5 Pro is glued to the body with high-strength double-sided tape to replace it:

1. Put a plastic blade on the battery from any angle, and if it doesn't lend itself, warm the body slightly with a hair dryer (maximum 60).°C!).
2. Carefully pull the black tape (pull-tab), if any, and in most cases it is torn off at the first disassembly.
3. If there's no tape, use a plastic card to gradually separate the battery from the case.
4. After extraction, clean the contacts of the new battery with alcohol and glue it to a new bilateral tape (for example, 3M 9448A).

After installing a new battery, do not turn on the phone immediately - let the glue grab for 10-15 minutes.

Disassembly of the display module

The Redmi 5 Pro display consists of three layers:

1. Protective glass (if installed by the user).
2. Touchscreen (sensory layer).
3. AMOLED-matrix (model) TD4300).

To replace glass or matrix:

1. Warm up the display with a hair dryer (60–70)°C) for 3-5 minutes.
2. Put the glass in a plastic pickup from the corner. OCA-glue, you will need a special thread to separate the layers.
3. When replacing the matrix, disconnect the display and sensor plumes (they are separate!).
4. Stick the new matrix with the help of LOCA-glue and UV lamps (for polymerization).

⚠️ Warning: If the display is working after the replacement, but the sensor is not responding, check:

• The integrity of the touchscreen plume (often damaged by careless removal).
• Correct connection (the connector must be clicked with a characteristic sound).
• Settings in Settings → System system → Gestures (sometimes calibration is lost).

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When replacing the display, be sure to use original parts or quality analogues (for example, from the manufacturer Tianma). Cheap matrixes can have broken pixels or incorrect color reproduction.

7. Build the phone: reverse order and check

The Redmi 5 Pro should be assembled in reverse order, but with a few nuances in mind:

1. Glue: Use a new double-sided scotch for the battery and back cover. Liquid glue (e.g., liquid adhesive, B-7000) thin-layer.
2. Screw them in the same order as you did. Long screws on the camera, short screws on the speaker.
3. Trains: Make sure all connectors are tightly connected, and the fingerprint scanner's plume should be flat, without any inflections.
4. Testing: Before final assembly, plug in the battery and check: 🔋 Charging (connect the cable) USB-C). 📵 Communication (insert) SIM-map). 🔊 Sound (speaker and microphone). 📷 Camera and fingerprint scanner.

If the phone does not turn on after assembly, check:

• 🔌 Battery connection (possibly the connector has left).
• 🔧 Tighten the screws on the board (but don't pull over!).
• 📱 Integrity of plumes (especially display and power buttons).

⚠️ Attention: If you have any foreign sounds (squeaking, crunch) after assembly, you may have pulled the screws or installed the back cover incorrectly.

8. Frequent mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when disassembling the Redmi 5 Pro. Here are the most common of them and ways to prevent them:

• 🔧 Break the screws - use high-quality screwdrivers with a magnetic tip. If the screw "licked", carefully drill it with a nap.
• 🔥 Overheating of the case - do not hold the hair dryer in one place for longer than 10 seconds.
• 📱 Damage to the fingerprint scanner plume - before removing the cover, make sure that the mediator does not touch the plume.
• 🔋 Short circuit - always turn off the battery before working with the board. Use an antistatic bracelet.
• 🧲 Loss of screws – spread them out in order on a magnetic mat or sign containers.

If you are experiencing a non-standard problem (for example, the phone is switched on but not charged), check:

• 🔌 Connector. USB-C for the presence of oxidation (clean with alcohol).
• 📊 Power controller (chip) BQ25890) on board - if it overheats, oversweetening is required.
• 🔋 Battery thermistor – when the phone breaks, it will not charge.

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If the phone discharges quickly after replacing the battery, calibrate: completely discharge it before turning it off, then charge it to 100% without interruptions. Repeat the process 2-3 times.

FAQ: Answers to Frequent Questions