Xiaomi Redmi Note 5A (codenamed ugg) remains a popular choice among users due to its balance of price and functionality. However, over time, even reliable equipment requires repairs, from replacing the charging connector to cleaning the cooling system. Disassembling the phone is the first step in most repair procedures, but without knowing the nuances, it is easy to damage plumes, glass or board.
This article will help you to disassemble the Redmi Note 5A without risking internal components. We will describe in detail every step from tool preparation to removal of the back cover and battery removal. We will focus on the typical errors that lead to a break in the display or loss of leakage. If you have never taken apart smartphones, don’t worry: the manual is adapted for beginners, with photos and explanations.
⚠️ Important: Disassembling your phone will void the warranty (if it's still valid). 5A Not on warranty service before you start work. Also remember that wrong actions can lead to data loss - make a backup in advance through Mi Cloud or Google Account.
Preparation for disassembly: tools and safety
Before you disassemble the Xiaomi Redmi Note 5A, prepare the workspace and tools. Lack of lighting or inappropriate screwdrivers are the main causes of damage to the case and board.
- 🔧 Torx-bit screwdriver set T3, Torx T4 and Phillips PH00 (for back-cover screws and board).
- 📱 Plastic blades or mediators (to separate the cover without scratches).
- 🔋 Suction (helps to suction the screen if you need to replace it).
- 🧲 Magnetic mat or screw container (so as not to lose small details).
- 🔥 Dryer or thermo-air station (to soften the glue when replacing the display).
- 🧴 Isopropyl alcohol (to clean contacts and remove glue residues).
Work on a clean desk with good lighting. Avoid carpeting — static electricity can damage chips. If you replace the battery, pre-order the original BL-416 battery (3080 mAh) — fakes often swell or quickly lose capacity.
⚠️ Warning: Do not use metal tools to separate the back cover! even a small scratch on the antenna lines (located on the edges of the body) can degrade the signal 4G or wifi.
Step 1: Removing the back cover
The back cover of the Redmi Note 5A is mounted on latches and glue, and to remove it, follow the algorithm:
- Turn off the phone and remove the tray for SIM-cards (use a paper clip or special key).
- Heat the edges of the cover with a hair dryer (a temperature of ~60 ° C) for 1-2 minutes. This will soften the glue and facilitate separation.
- Insert a plastic blade into the gap between the lid and the body (start at the bottom edge where the charging connector is).
- Carefully swipe the perimeter with a blade, alternately snapping the clamps. Do not force - if the lid does not respond, warm up the problem area again.
When you remove the lid, you'll see the battery, the motherboard, and the plumes. Don't pull the plumes, they're fragile and easily detachable from the connectors. If the lid is glued too tightly (for example, after previous repairs), use a thread or a special glue cutter to separate it without damage.
☑️ Preparation for lid removal
⚠️ Critical error: Many users try to plug the lid from the top edge (where the camera is) where the antenna contacts are located - their damage will lead to a loss of signal of the mobile network by 20-30%.
Step 2: Shutting off the battery
Before any manipulation of the board, be sure to turn off the battery. Even when the capacitors on the board are off, they can store charge, which will lead to a short circuit when accidentally touched.
The battery in the Redmi Note 5A is glued to the body to remove it.
- Unplug the protective film (if any) from the battery connector on the board.
- Carefully slap the battery plume with a plastic spatula and unplug it from the connector.
- If the battery is swollen, don't try to puncture it, it can cause fire. Use isopropyl alcohol to soften the glue and slowly pull the battery around the edges.
| Symptoms. | Reason. | Decision |
|---|---|---|
| The phone does not turn on after the battery is turned off. | Short circuit on board | Check the fee for the presence of foreign objects (screws, shavings) |
| The battery is discharged quickly after assembly. | Bad plume contact | Reconnect the battery connector and check the fixation |
| Phone overheats | Damage to the heat pad | Replace the heatpast on the processor |
⚠️ Warning: If the battery is deformed (bloating more than 2 mm), do not use metal tools to remove it.
Step 3: Removing the motherboard
The Redmi Note 5A board is mounted on 8 different size screws, and remember the location of each screw, if you mix them up when you build them, you can damage the connectors or the body, and we recommend you take a picture of the board before you remove it.
Procedure:
- Unscrew all screws (use a magnetic screwdriver so they don't fall inside the case).
- Carefully raise the charge over the edge, starting from the charging connector. Don't pull it too hard, because the speaker plumes and power buttons are underneath the board.
- Disconnect all the plumes with a plastic blade, and pay special attention to the plume of the display module, which is the most fragile.
After removing the board, examine it for oxidation (green coating), chipped or traces of moisture. If the phone fell into the water, even after drying, corrosion stains could remain - they must be cleaned with alcohol and a special solution (for example, Contact Cleaner).
What to do if the screw breaks inside the body?
Step 4: Disassembly of the display module
If the purpose of disassembly is to replace the screen, the display module must be separated from the body. In the Redmi Note 5A, the screen is glued around the perimeter, and the plumes are hidden under a metal frame.
- 🔥 Warm up the screen with a hair dryer (temperature 70-80)°C) for 3-5 minutes, evenly running along the edges.
- 📱 Pound the screen with a suction cup at the bottom edge (where the touch button is) and gently pull up.
- 🔧 Once a slit appears, insert a plastic spatula and slowly separate the screen by cutting the glue.
- ⚡️ Disconnect the display and sensor plumes from the board (they are fixed by latches - lift them with a screwdriver).
If the screen cracks, stick tape on it before heating - this will prevent the fragments from crumbled. Do not use a knife or metal tools to separate the glass - you risk damaging it. OLED-plume.
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If the new screen doesn't respond to touch after you've replaced it, check to connect the sensor plume, which often flies off when you build it because the latch is not fixed enough.
Step 5: Replace connectors and additional components
A common problem with the Redmi Note 5A is the failure of the charging connector (USB Type-C) or speaker. Their replacement does not require complete disassembly, but there are nuances:
- 🔌 Charging connector: soldered to the board, you need a soldering dryer and experience with chips, if you don't have skills, you better contact the service.
- 🔊 Speaker: It's mounted on two screws and glue, and when you replace it, check the integrity of the rubber gasket, which protects against dust.
- 📷 Camera: Modules (basic 13 MP and front 5 MP) are mounted on screws. When you replace, do not touch the lenses - greasy spots will worsen the quality of the photo.
If you are replacing the vibrator, make sure that the new module is compatible with the Redmi Note 5A (model 04511-000).
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When replacing the charging connector, always check the integrity of neighboring components (capacitors and resistors), which overheating during soldering can damage them, which will lead to problems with charging or power.
Assembly of the phone and checking of performance
The Xiaomi Redmi Note 5A is assembled in reverse order, but with a few rules in mind:
- Before installing the battery, clean the contact board and plume with alcohol.
- Twisting the screws cross-cross to avoid skewing the board.
- Check the tightness of the case - if there are gaps, seal them with double-sided tape.
- After assembly, turn on the phone and check: 📶 Network signal and Wi-Fi. 🔋 Charging (plug the cable and make sure the current is going on). 🎵 Sound in the speaker and microphone. 📸 The operation of cameras and fingerprint sensor (if any).
If the phone does not turn on after assembly, check:
- Battery connection (possibly the plume is not fully inserted).
- Integrity of the power plume (often damaged by careless extraction of the board).
- The presence of foreign objects under the board (screws, shavings from the body).
⚠️ Warning: If you have stripes or artifacts after you change the screen, check the connection of the display plume. Often the problem is solved by reconnecting. If the artifacts remain, you may have a factory failure of the matrix.
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when disassembling the Redmi Note 5A. Here are the most common of them and ways to prevent:
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Using a metal screwdriver to separate the cover | Scratches on antenna lines → signal loss | Use only plastic blades |
| Overheating of the battery during retrieval | Bloating or ignition of the battery | Heat no more than 60°C, use alcohol to soften glue |
| Confused screws during assembly | Damage to the thread or board | Store screws in separate containers with signatures |
| Dramatic disconnection of plumes | Contact breaks → a broken screen or camera | To smear the plumes only with a plastic shovel |
If you doubt your abilities, it is better to contact the service center.The cost of dismantling the Redmi Note 5A in the workshops usually does not exceed 500-800 rubles, which is cheaper than repairing after an unsuccessful independent attempt.
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The most common cause of failure after disassembly is damage to the display plume. Always check its fixation with a latch before assembly.