Xiaomi’s modern Redmi series smartphones are famous for their metal body, which gives the device a premium look and reliable protection for internal components. However, it is this all-metal design that turns the disassembly process into a complex engineering task that requires not only accuracy, but also the availability of a specialized tool. If you plan to replace a broken display glass, battery or just clean the charging connector, you will have to face the need to open the case.
Unlike older models with removable rear panels, the Xiaomi Redmi 5 has no visible screws or latches on the outside. The entire structure is supported by a powerful layer of glue and screws hidden under decorative elements. The wrong approach to disassembly can lead to damage to the plumes, cracks in the glass or even failure of the motherboard. So before starting work, it is extremely important to study the theoretical part and prepare the workplace.
In this article, we will take a closer look at all the steps of removing the back cover, focusing on safety and the nuances of working with adhesives. You will learn what tools are needed for safe repairs, how to heat the case without overheating electronics and what mistakes are most common for beginners. Following the instructions will help you keep the device intact and bring it back to life.
Tools and workplace preparation required
Before you start to physically affect the body of the smartphone, you need to collect a full set of tools. Use of inappropriate items such as knives or needles is strictly prohibited, as they can damage the internal plumes or scratch metal. For a high-quality dismantling of the Redmi 5, you will need a professional or semi-professional set for repairing mobile equipment.
The adhesive layer that holds the lid is strong enough to be removed without preheating, but overheating is dangerous for the lithium polymer battery, which is just below the back panel, and the optimum warm-up temperature is about 80-90 degrees Celsius, allowing the adhesive to soften without damaging the battery.
☑️ A set of tools for opening Redmi 5
The workplace should be well lit and free of unnecessary objects. It is recommended to use an antistatic mat to eliminate the risk of damage to electronics by a static charge. Also prepare a screw tank, since the design of the smartphone uses fasteners of different lengths, and it is very easy to confuse them when Assembly.
Safety and warm-up of the body
The heating process is a critical step that determines the success of the entire operation. If you use a building hair dryer, keep it at a distance of 3-5 cm from the surface of the phone and constantly move the air jet so as not to melt the plastic frames or damage the display matrix on the back. Warm-up time is usually from 2 to 4 minutes depending on the power of the device.
⚠️ Warning: Never heat your smartphone in the camera area and directly above the battery for too long. Local overheating can cause the battery to bloat or catch fire.
If the thermophen is not available, you can use a special electric heating pad for smartphones, setting the temperature at 80 degrees and holding the device on it for about 5-7 minutes.An alternative, but less effective method is the use of a dense hot water bag, although it rarely gives enough temperature to soften industrial glue.
You can check the body's readiness for opening by slightly pulling the suction cup near the bottom of the back cover. If you feel a slight movement or hear a quiet crackling of the outgoing glue, then the temperature has reached the desired values. Don't try to force the lid off if it does not lend itself, you better warm the device again.
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Before the start of heating, be sure to remove SIM-Not only will this make it easier to get air out when you expand, but it will also prevent accidental damage to the tray contacts when you put pressure on the body.
Rear cover separation process
When you're successful, you have to get the metal panel to the right side, and you use a thin plastic blade or a special knife to open it, and you can start at the bottom end or the side edges, where the glue is usually thinner, and you can put the tool in the gap between the frame and the lid, and you can be as delicate as possible.
Move the blade along the perimeter, gradually cutting through the adhesive layer. Do not dive the tool deeper than 2-3 millimeters, so as not to touch the plumes coming from the volume and inclusion buttons that can be glued to the inside of the lid. The main task is to create a uniform gap throughout the circuit, after which the lid should easily move away.
- 🔹 Carefully tuck the lower corner with a plastic spatula, trying not to damage the antenna inserts.
- 🔹 Move along the side faces, slightly swaying the tool from side to side.
- 🔹 Exercise special care in the upper part, where the main camera module is located.
- 🔹 If the lid does not lend itself, stop the effort and reheat the problem area.
It's important to understand that in the Xiaomi Redmi 5, the back cover is a load-bearing element of the structure, and some components can be attached to it. A sharp jerk can cause the plume of the fingerprint scanner or antenna module to break.
Nuances of work with a fingerprint scanner
Dismantling of internal components
Once the back cover is successfully removed, you can access the inside of the smartphone, but that doesn't mean you can start replacing the battery or other parts right away, it has a plastic safety bar and a lot of screws that need to be twisted in a strict sequence, most often a Torx T5 screwdriver.
The first thing you do is remove the plastic lining that covers the top of the case where the motherboard is located, and it's fixed by multiple screws around the perimeter and one in the center, and once you unscrew it, the board becomes available for further manipulation, such as turning off the display plumes or the battery.
| Component | Type of attachment | Tool. | Features |
|---|---|---|---|
| Back cover. | Glue + screws (hidden) | Scapula, hairdryer | Requires heating to 80°C |
| Protective bar. | Torx screws | Screwdriver T5 | Hiding connectors |
| Battery | Glue + connector | Scapula, sucker. | Don't puncture! |
| Camera module | Screws + plume | Screwdriver, tweezers. | Fragile lens |
When working with internal components, be sure to disconnect the battery from the motherboard before any other action, this will turn off the device and eliminate the risk of short circuit when accidentally touching the contacts with the tool. Use a plastic blade or nail to turn off the plume, avoiding metal objects.
Battery replacement and device assembly
Replacing the power source is one of the most common reasons for disassembling the smartphone. In Redmi 5, the battery is attached to bilateral tape, which eventually loses its properties or, conversely, sticks to the bottom. To extract the old battery, you can use a special suction cup or gently tweak the edge with a plastic card, preheating the back of the case (already without a lid).
⚠️ Warning: It is strictly forbidden to pierce, bend or heat the battery above 60 degrees. Damage to the lithium polymer battery shell can lead to instant ignition and chemical burns.
After removing the old battery, clean the seat of the residue of old glue.The new battery is recommended to be attached to special adhesive tapes or double-sided tape for phones so that it does not hang inside the case. Connect the new battery plume to the motherboard before clicking.
The assembly is done in reverse order. Make sure all screws are swirled into their seats and the plumes are not clamped. Pay special attention to the main camera module, it should sit tightly in its nest. Before the final sticker on the back cover, check the functionality of all the functions: touchscreen, speakers, microphone and vibrator.
Typical errors and problems in disassembly
Even experienced craftsmen sometimes make mistakes, let alone beginners. One of the most common problems is that the plume of the main camera module is damaged when the protective bar is not neatly removed. This plume is very thin and easily breaks when moving sharply. Another common mistake is the loss of screws of different lengths, which can damage the motherboard when assembled if a long screw hits the hole for a short one.
Also, users often forget to clean the surface of old glue before sticking a new lid, which causes the lid to hold poorly, so that the backlashes appear, and the smartphone is no longer protected from dust and moisture. Use isopropyl alcohol to degrease the surfaces.
- 🔹 Using metal tools inside the body, leading to scratches and closures.
- 🔹 Excessive heating, resulting in detachment of polarization film on the display.
- 🔹 Ignoring battery shutdown before disconnecting other plumes.
- 🔹 Attempting to force the connectors, which breaks the contacts on the board.
If the phone doesn't turn on after assembly, don't panic. Check if the battery connector and the display plume are tight. Sometimes it's enough to just reconnect the battery. If the screen is black, but the phone vibrates when you call, maybe the display plume or the module itself is damaged.
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The key to successful assembly is cleanliness and order, and each screw must be in its place, and all surfaces must be cleared of dust and grease before final bonding.