Disassembly Xiaomi Redmi Note 5: a detailed guide with photos and tips of professionals

Xiaomi Redmi Note 5 is one of the most popular budget smartphones of the brand, released in 2018. Despite the strength of the design, over time owners have to face the need to repair: from replacing the charging connector to recovering from a fall. Disassembly of this device has its own nuances related to the adhesive mounting of the battery, the fragility of the plumes and the location of the screws.

In this article, you will find a step-by-step guide with photos of key steps, a list of tools you need, and unique tips to help avoid typical errors. We will also look at what parts most often fail, how to diagnose them, and what to do if the phone does not turn on after disassembly. Special attention is paid to safety: working with lithium-ion batteries requires caution, and improper handling of flexible plumes can lead to irreversible damage.

If you’ve never taken a smartphone apart before, start by learning the structure of the Redmi Note 5. Its body consists of three main parts: a back cover (stick to the frame), a battery (also fixed with glue), and a motherboard with daughter modules. The main difficulty is the lack of official documentation on the location of screws of different lengths, which often leads to damage to the board during assembly.

Preparation for disassembly: tools and precautions

Before you start, make sure you have everything you need, and not even one tool can make a showdown a nightmare, for example, trying to stick a knife in the back cover instead of a mediator is almost guaranteed to result in scratches or chips.

Here is the minimum set that will be required:

• 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, five-pointed Y00 screw-tray SIM-map)
• 📱 Plastic mediators (2-3 (p) or suction cups for removal of the lid
• 🔥 Hair dryer or thermo-air station (for softening glue)
• 🧲 Magnetic mat or screw container (so as not to lose small details)
• 🔋 Capton or Isolation (for battery isolation after removal)
• 🛠️ Tweezers with thin ends (for working with plumes)

Pay special attention to temperature. Overheating the battery above 60°C can cause it to swell or even catch fire. Use a dryer at a minimum power (up to 300°C) and keep it at a distance of 5-7 cm from the body. If the glue does not respond, it is better to repeat the heating than to apply excessive force.

⚠️ Warning: Never use metal tools to lid! Redmi Note 5's aluminum frame is easily deformed and glass can crack. Plastic mediators or special shoulder blades are the only safe option.

Removal of the back cover: technique and typical errors

The back cover of the Redmi Note 5 is glued around the perimeter, and is also fixed by two screws under the tray. SIM-Start by unscrewing them with a five-point screwdriver. Y00. Then carefully heat the edges of the body with a hairdryer, paying special attention to the corners - there the glue usually holds tighter.

Once the glue has softened, proceed to remove the cover:

1. Place the suction cup in the bottom of the phone (above the USB-C connector).
2. Pull up carefully, creating a small gap.
3. Insert a plastic mediator into the slot and slowly lead it along the edge, separating the lid.
4. Exercise special care in the area of antenna contacts (upper and lower parts) - they are easy to tear off!

If the lid doesn't work, don't try to rip it off. Better warm up the problem area again. Remember: the glue loses strength at ~50°C, but don't overdo it - overheating can damage the display or battery.

When you take the lid off, you'll see the battery, the motherboard, and a few plumes. Don't touch the board with your bare hands, static electricity can damage the chips. Use an antistatic bracelet or periodically touch a grounded metal object.

Battery shutdown: why it's critical

Before you start disassembling, be sure to turn off the battery. The Redmi Note 5 motherboard has a special plug with a flexible plume that connects the battery to the power system, which is easy to miss, but it's one of the most dangerous mistakes.

Step-by-step:

1. Find the battery connector – it’s located at the bottom of the board, next to the wireless charging coils (if supported by your model).
2. Carefully tuck the black connector lock with tweezers or a plastic spatula.
3. Disconnect the plume by pulling it upwards perpendicular to the board (not to the side!).

⚠️ Note: If you skip this step and accidentally close the contacts on the board (such as a screwdriver), this can lead to a short circuit, the power controller burning or even a battery fire!

After the battery is turned off, it is recommended to seal the contacts with tape or capton, which will prevent accidental circuit during further disassembly. If the battery is swelling (as seen by the bulge of the lid), do not try to pierce or bend it, dispose of it immediately according to local rules.

Removal of the motherboard: the location of screws and plumes

The Redmi Note 5 motherboard is mounted on 12 screws of different lengths, one of the most difficult parts of disassembly, as tangled screws can damage the board when assembled, and we recommend taking a picture of their location or using a magnetic mat with markup.

Here is the mounting diagram (clockwise numbering, starting from the USB-C connector):

Before you take out the fee, disconnect all the plumes:

• 📸 Main camera plume (at the top of the board)
• 🔊 Dynamic plume (right of the battery)
• 📱 Display plume (the widest, at the bottom)
• 🔋 The plume of the power button (thin, under the board)

The plumes are fixed with latches or glue. To disconnect them, gently tweez the lock with tweezers and pull the plume parallel to the board. If the resistance is too strong, check if there are any untwisted screws left.

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If the display plume is detached from the connector, do not try to solder it yourself - the micro contacts are too small. It is better to order a replacement plume in the service center (cost ~ 800-1200 rubles).

Diagnosis of malfunctions: what breaks most often

If you take apart the Redmi Note 5, you might encounter a few common problems, and here are the most common malfunctions and their signs:

1. Charging connector (USB-C)

• 🔌 Symptoms: the phone is not charging, is defined as an unknown device on the PC, the charge goes only in a certain position of the cable.
• 🔧 Solution: Replacement of the connector (cost) ~500-700 rubles. When soldering work, use flux RMA-223 and soldering iron with a power not exceeding 30 watts.

2. Bloated battery

• 🔋 Symptoms: the lid is curved, the phone spontaneously turns off at 20-30% charge, overheats.
• 🔧 Solution: Replacement of battery (original: BM43, ~After replacement, calibrate: discharge to 0%, then charge to 100% without interruption.

3.Damaged display plume

• 📱 Symptoms: vertical stripes on the screen, lack of response to touch, flickering backlight.
• 🔧 Solution: replacement of the plume (~If the matrix itself is damaged, repair will cost in the amount of 1,000-1500 rubles. ~RUB 3000-4,000.

Faulty power controller

• ⚡ Symptoms: the phone does not turn on, does not respond to charging, overheats when connected to the network.
• 🔧 Solution: multimeter diagnostics (voltage testing on capacitors) and circuit repairs will cost you a lot of money. ~2000–5000 rubles, depending on the complexity.

If you're not sure about your skills, don't take risks with soldering jobs. Modern smartphones have multi-layered boards with micro components, and one mistake can knock out the entire machine, and in such cases, you should contact the service center.

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Before assembly, be sure to check all the plumes for integrity and correctness of the connection. even a slight skew can lead to a lack of image or touch functions.

Phone Assembly: How to Avoid Mistakes

The Redmi Note 5 should be built in reverse order, but with a few critical points in mind:

1. Check the sealing gums around the camera and the speaker. If they are damaged, replace them (Article: XM-SEAL-KIT).
2. Apply the new glue to the back cover. Use 3M 9448A double-sided tape or B-7000 liquid glue (don't overdo it - the excess can get on the board!).
3. Tighten the cross-cross screws to avoid board skewing. Start with the corner screws, then move to the center.
4. Check the operation of all functions before the final assembly: camera, speaker, microphone, sensor.

After assembly, turn on the phone and perform the test:

• 📞 Call your phone to check the speaker and microphone.
• 📸 Take a photo on the front and main cameras.
• 🔋 Connect the charger and make sure that the charge is going.
• 🌡️ Check the temperature of the case – if it warms more than usual, perhaps poorly fixed radiator processor.

⚠️ Warning: If the phone doesn't turn on after assembly, but vibrates when you press the power button, it's probably a problem with the display plume or battery contacts.

Frequent questions after the dismantling of the Redmi Note 5