How to disassemble Redmi Note 5 Pro: detailed instructions with photos and secrets of the masters

Redmi Note 5 Pro - one of the most popular smartphones Xiaomi among users who value the balance of price and performance. However, even such a reliable device may require repairs over time: from replacing the charging connector to restoring it after a fall. Disassembling this device has its own peculiarities associated with the adhesive fixation of the battery, the fragility of the cables and the non-standard arrangement of some components.

In this article you will find step-by-step disassembly instructions taking into account the typical mistakes of beginners, list of required tools (including alternatives to vocational devices), and recommendations for troubleshooting before the start of work. We'll figure out how to safely remove the back cover, disconnect the battery without damaging it, and get to the motherboard without damaging the display and camera flex cables.

We will pay special attention unique feature of this model: double-sided tape under the battery, which, if removed carelessly, can break the contacts or leave adhesive marks on the board. You will also learn which parts most often fail and how to check them without specialized equipment.

Preparing for Disassembly: Tools and Safety Precautions

Before you start disassembling Redmi Note 5 Pro, make sure you have everything you need. Missing even one tool can damage the housing or internal components. Here minimum setwhich you will need:

• 🔧 Plastic picks or paddles (0.2–0.5 mm thick) - to separate the lid and body. Metal tools must not be used!
• 🔥 Hair dryer or hot air station — to soften the glue under the battery (temperature 60–80°C).
• ⚡ Isopropyl alcohol (90%+) — for cleaning adhesive residues and contacts.
• 📏 Sucker - helps to lift the lid after heating (alternative: wide tape).
• ✂️ Scissors or scalpel - for neat cutting of double-sided tape.
• 🔋 Multimeter — to check the battery voltage (optional, but recommended).

If this is your first time disassembling a smartphone, practice on an unnecessary device or watch a video disassembly. Please note: Redmi Note 5 Pro has aluminum case with plastic inserts, which is easy to bend with excessive force. Also in this model there are no screws under the back cover — it is held in place only by glue and latches.

⚠️ Attention: Do not use metal tools to pry the lid! Even a small scratch on the antenna lines (thin copper traces around the perimeter of the case) can degrade Wi-Fi and cellular signals.

Removing the back cover: step-by-step process with photos

The first and most important stage is separating the back cover. B Redmi Note 5 Pro it is glued along the perimeter, and in the lower part it is additionally fixed with latches. Here's how to do it right:

1. Turn off your smartphone and remove the SIM card tray (use a paper clip or a special key).
2. Heat the edges of the case with a hairdryer for 2-3 minutes, holding it at a distance of 5-7 cm. The temperature should be comfortable for the hand (not higher than 80°C).
3. Place the suction cup towards the bottom edge (above the SIM card tray) and pull up. If the lid does not budge, repeat heating.
4. Insert plastic pick into the resulting gap and carefully move it around the perimeter, separating the glue. Start from the bottom corner!

Important: do not try to tear off the cover abruptly - this may damage the fingerprint scanner cable (if it is installed under glass). B Redmi Note 5 Pro this cable goes from the top of the cover to the motherboard and easily breaks if moved carelessly.

Is the smartphone turned off?|Is the SIM card tray removed?|Are the edges of the case heated with a hairdryer?|Is the plastic pick ready?|Is there a suction cup or an alternative?-->

After removing the cover, you will see a battery covered with black film and several cables. Don't pull the trains! They are attached to the board with connectors with latches that must first be opened. Also note double sided tape under the battery — you can’t just pull it, otherwise you’ll break the contacts.

Disconnecting the battery: how not to damage the board

Battery in Redmi Note 5 Pro - one of the most vulnerable places. It is glued to the body with double-sided tape, which over time “sticks” to the metal. If you try to tear it off by force, you can:

• 🔋 Break the contact tracks on the board (especially near the charging connector).
• 🔥 Overheat the battery (risk of swelling or fire when using a hair dryer at maximum power).
• ⚡ Damage the power controller (if you shorten the contacts with a tool).

To remove the battery safely, follow this procedure:

1. Disconnect the battery connector from the motherboard (use a plastic spatula). The connector is located at the bottom of the board, next to the charging connector.
2. Warm up the battery with a hairdryer from the reverse side (through the lid) for 3–5 minutes. Temperature - no higher than 70°C.
3. Use a plastic card to pry off the battery from any angle where the gap is visible. If the tape doesn't budge, apply some isopropyl alcohol into the gap - it will dissolve the glue.
4. Gently pull the tape (if it is under the battery) or continue to pry the card, moving around the perimeter.

⚠️ Attention: If the battery is swollen (the cover is bent or gaps appear), do not heat it with a hairdryer and don't pierce! This may cause a fire. In this case, it is better to contact the service.

After removing the battery, inspect it for swelling or corrosion on the contacts. Normal battery voltage Redmi Note 5 Pro — 3.7–4.2 V. If it is lower 3.5 V, the battery needs to be replaced.

What to do if the battery is stuck to the board?

If the tape does not come off even after heating, try the following methods:

1. Apply isopropyl alcohol (90%+) to the edge of the battery and wait 5-10 minutes.

2. Use thin guitar string or fishing line to “saw” the tape along the body.

3. As a last resort, carefully cut the tape with scissors, but do not touch the board!

Access to the motherboard: connectors and cables

After removing the battery, you can begin to remove the motherboard. B Redmi Note 5 Pro it is attached to 12 screws different sizes (from Y000 to PH000), so it is recommended to lay them out in order or photograph the arrangement.

Before unscrewing the board, you must disconnect all cables and connectors:

Component	Location	Disconnection Features
Display cable	Top of the board, under the metal shield	The latch opens upward. Don't pull on the train - it's fragile!
Fingerprint scanner cable	Under the battery, on the right	Attached with glue. Gently pry off with a spatula.
Camera connector	Upper left corner of the board	The latch opens to the side. Do not touch the lenses!
Speaker connector	Bottom of the board, next to the charging connector	Sometimes it gets stuck. Wiggle it with a spatula before removing.

After disconnecting all cables, carefully remove the board by pulling it by the edges. Don't force it if it gets stuck - check that all the screws are unscrewed. B Redmi Note 5 Pro people often forget about screw under the SIM card tray (it is hidden under the sticker).

Typical faults and their diagnosis

Disassembly Redmi Note 5 Pro often required to resolve the following problems:

• 🔌 Charging does not work - usually the connector is to blame USB-C (oxidation of contacts or breakage of solder tracks).
• 📵 No network or bad signal — check the antenna cables and contacts on the board (they often oxidize after exposure to moisture).
• 🔊 Speaker or microphone does not work — inspect the cables for breaks and check the soldering of components near the charging connector.
• 📱 Doesn't turn on after falling — there may be cracks on the board or the BGA chips may fall off (an X-ray or diagnostics at a service center is required).

For initial diagnostics, use a multimeter:

• Call power circuit (from battery to board) - resistance should be close to 0 ohm.
• Check power button voltage - when pressed it should appear 3.3 V.
• Measure antenna circuit resistance - a break or short circuit indicates damage to the loop.

If the smartphone does not turn on, but the indicator lights up when connected to charging, the problem may be power controller (PMIC) or firmware. In the first case, soldering will be required, in the second - flashing via EDL mode.

1. Correct connection of all cables (especially the display and battery).

2. There is a short circuit on the board (check with a multimeter).

3. Integrity of the power button (often breaks due to careless assembly).-->

Assembling the device: how to avoid mistakes

Assembly Redmi Note 5 Pro after repair is no less responsible than disassembly. Here are the key points to pay attention to:

1. Check all cables for any kinks or dirt. Clean the contacts with isopropyl alcohol.
2. Make sure all screws are tight - A missing screw can cause a short circuit.
3. Apply new double-sided tape under the battery (you can use tape from an old battery if it has not lost its adhesiveness).
4. Check the operation of all functions before final assembly: camera, speaker, sensors, charging.

Errors during assembly can lead to new breakdowns. For example, if you pinch the display cable, white streaks or artifacts. If you install the battery incorrectly, your smartphone may turn off on its own or not charging.

⚠️ Attention: After assembly, do not turn on the smartphone immediately! Wait 10–15 minutes - this time is needed for the glue under the battery to “shrink” and the contacts to stabilize. Also check to see if the board is getting hot near the processor (overheating indicates a short circuit).

Frequently asked questions and answers (FAQ)

Is it possible to disassemble Redmi Note 5 Pro without a hair dryer?

Theoretically, yes, but the risk of damaging the cover or cables is much higher. Without heating, the glue does not soften, and the lid may burst when trying to remove it. An alternative to a hairdryer is to place the smartphone in a warm place (for example, on a battery) for 10–15 minutes, but this method is less effective.

How to check if the fingerprint scanner is working after disassembly?

Connect the scanner cable to the board and start the smartphone. If the scanner does not respond:

1. Check whether the cable is inserted correctly (the latch must be closed).
2. Inspect the cable for damage (it often breaks at the base).
3. Try calibrating the scanner in the settings (Settings → Lock & security → Fingerprints).

If all else fails, you will need to replace the cable or the scanner itself.

What should you do if your smartphone runs out quickly after replacing the battery?

The reasons may be different:

• 🔋 Poor quality battery — check the capacity with a tester (must be at least 3800–4000 mAh).
• 📉 Charge controller not calibrated — perform a full discharge/charge cycle (0–100%).
• 🔥 The board consumes too much - measure the quiescent current with a multimeter (norm: 50–100 mA in the off state).

If the problem persists, check the power circuits on the board - it may be damaged PMIC.

What glue should I use for the back cover?

For Redmi Note 5 Pro suitable:

• 🔥 Double-sided tape 3M 9448A (thickness 0.25 mm) - the most reliable option.
• 📏 Liquid glue B-7000 — apply a thin layer around the perimeter (do not overdo it, otherwise the lid will not sit smoothly!).
• 🔧 Hot glue - only for temporary fixation (short-lived).

Before gluing, degrease the surfaces with alcohol.

Can I replace the charging connector myself?

Yes, but it requires soldering experience. Connector USB-C in Redmi Note 5 Pro soldered to the board, and if dismantled carelessly, the contact pads can be torn off. If you are not confident in your skills, it is better to contact the service. The cost of replacing a connector in a workshop is approx. 1000–1500 rubles.