How to gently open the cover Xiaomi Redmi 7A: a full guide with photos and tips

Xiaomi Redmi 7A is one of the most popular budget devices of the brand, but even it is not immune to breakdowns. The battery fails after 2-3 years of intensive use, the speaker begins to wheez and the charging connector is loosened. In most cases, repair requires removing the back cover - a task that scares many users. Fear of breaking latches or damaging plumes often forces you to contact service centers, where a simple dismantling takes 500-1500 rubles.

In fact, you can open the Redmi 7A yourself if you know the design and use the right tools, and the key is to take your time and avoid brute force. In this article, you will find step-by-step instructions with a photo, a list of necessary tools, and tips on how to minimize the risks of damage. We will also analyze the typical mistakes that beginners make, and explain why some methods (such as heating with a hair dryer) can be dangerous for this model.

If you've never taken a smartphone apart before, don't worry: the Redmi 7A is one of the most "friendly" self-repair models, and it's not glued together like a flagship, but it's mounted on plastic latches. But that doesn't mean you can do without training. You'll learn what tools you'll need, how to fit the lid, and what to do if the latches don't work.

Preparation for disassembly: tools and safety

Before you start removing the lid, make sure you have everything you need, and the lack of the right tools is the main cause of damage to the body or internal components, and here is the minimum kit you'll need:

• 🔧 Plastic blade (or mediator) - for gently putting the lid on. Metal tools can leave scratches!
• 🔋 Suction cup (optional) - helps to lift the cover after heating the glue, even from an old case.
• 🔥 Hair dryer or thermo-air station to soften the glue around the perimeter. 60-70°C!
• 🧲 Magnetic screwdriver (cross, size) PH00) — screw-off.
• 📦 The screw container is designed to keep the small parts intact, and even a plastic bottle lid with slots will do.
• 🧴 Isopropyl alcohol (90%+) — Cleaning contacts and removing glue residues.

Important: If you are planning to replace the battery, additionally prepare a new battery (original or quality analogue from Baseus or Remax) and double-sided tape for fixation. Other types of repairs may require a soldering iron, tester or tweezers.

⚠️ Warning: Don't use a knife or screwdriver to lid the lid! Metal will easily slip and damage plumes or board. Plastic blade must be thin (0.1-0.2 mm) and flexible.

Before starting work, turn off the phone completely and remove it. SIM-If the battery is swelling, don't try to disassemble the device yourself, call the service! A bloated battery can ignite when mechanically exposed.

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If you don't have a hair dryer, you can use hot water in a plastic bag. Put the phone in a bag of warm (not boiling!) water for 2-3 minutes - the glue will soften, and the lid will be removed more easily.

Step 1: Heat the glue around the perimeter of the body

The Xiaomi Redmi 7A doesn't have the full-blown adhesive fixation that the flagship models do, but there's still a thin layer of glue on the perimeter of the lid, and you have to soften it so that the latches are released effortlessly. Here's how to do it right:

1. Turn on the dryer at minimum power and set the temperature 60-70°C.
2. Direct the air flow to the edges of the body, keeping the hair dryer at a distance of 5-7 cm Movements should be smooth, without delay in one place.
3. Warm up each edge for 15-20 seconds: the top (where the headphone jack is), the bottom (charge connector), and then the sides.
4. After warming up, gently pull the lid up with a suction cup or fingers. If it doesn't respond, repeat warming up again.

⚠️ Warning: Don't overheat the body! Temperature is higher 80°C can damage the plastic or display. If the lid is not removed after 2-3 Attempts, so the problem is not the glue, but the latches - move on to the next step.

An alternative heating method is to use an infrared lamp (if any) to heat the surface evenly without the risk of local overheating, and the exposure time is 1-2 minutes from a distance of 20 cm.

Step 2: Removal of the back cover - Step-by-step instructions

When the glue is softened, you can start removing the lid. The rule is, don't force it, and work slowly. Here's a detailed algorithm.

1. Place a plastic blade in the gap between the lid and the body at the headphone jack (top of the phone) and gently swipe it along the edge to release the first latch.
2. As soon as there is a gap of 1-2 mm, insert a second blade or mediator into it so that the lid does not close back.
3. Keep moving around the perimeter, alternately releasing the latches, especially carefully work around the volume and power buttons - there are fragile plumes.
4. When all the latches are free, gently lift the lid. If it holds in one place, check if the latches are not released.

In Redmi 7A, the lid is mounted on 12-14 plastic latches that are not evenly positioned, and the most stubborn ones are usually:

• In the upper corners (near the camera).
• In the lower part (near the charging connector).
• On the right side (from the power button).

Don't pull the lid with force -- if it doesn't come off, you miss the latch. Go back to the warm-up or try to tamper with another place. At the very least, you can use a thin guitar string (0.1 mm) to cut through the glue around the perimeter.

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling the Redmi 7A. Here are the most common mistakes and ways to prevent them:

Another common problem is that the fingerprint scanner plume is damaged, and in Redmi 7A, it runs under the lid along the right edge, and if you hear the characteristic crackle when you remove the lid, it probably broke, in which case the scanner will stop working and have to be replaced (the plume costs about 300-500 rubles).

In Redmi 7A, the fingerprint scanner plume is glued to the lid with double-sided tape. If you plan to reuse the old lid, carefully separate the plume, don't pull it by the wires!

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If the lid does not remove after 3-4 attempts, do not continue - contact the service. Most likely, the problem is in the deformed latches or factory defect.

What to do after the lid is removed?

When the lid is finally removed, the Redmi 7A’s interior design will open up in front of you.

• 📷 Camera - fixed on a metal frame, unscrewed by 2 screws.
• 🔋 Battery - glued to the body, connected to the motherboard with a plume.
• 🔊 Speaker and microphone - located at the bottom, covered with a metal mesh.
• 📶 Antenna contacts – thin gold stripes on the sides, easily bend!
• 🖥️ Mother's fee - fixed 6-8 screws, on top closed with a metal screen.

If your goal is to replace the battery, first disconnect the battery plume from the board (use a plastic blade!). Then gently tuck the battery and remove it by tucking the tape or glue underneath. For the new battery, use 3M double-sided tape or B-7000 special glue.

To repair the charging connector or speaker, you'll need to remove the motherboard completely, which is a complex operation that requires experience in soldering, and if you've never soldered microelectronics, you'd better leave it to the professionals.

⚠️ Warning: Do not turn on the phone after disassembly until all components are securely secured! Unlocked battery or board may close when vibrating.

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Before assembly, wipe the contacts of the battery and board with isopropyl alcohol. This will remove the oxides and improve the connection, which will prolong the battery life.

Building a phone: the reverse order of action

Putting the Redmi 7A back together is often harder than disassembling, and here are the key points to look out for:

1. Check all the plumes -- they should be flat, without any inflections -- the fingerprint scanner plume is particularly vulnerable!
2. Secure the battery -- use a new double-sided tape. The old glue loses its properties after removal.
3. Tighten the screws cross-to-cross, it will prevent the skewing of the board. Don't put too much effort into it!
4. Check the latches of the cover - before the final fixation, make sure that they all stand in place.
5. Warm up the glue - after assembly, you can slightly warm the edges with a hairdryer (50 ° C) so that the glue is better grasped.

Don't turn the phone on immediately after assembly. Wait 10-15 minutes for all components to settle.

• Does the fingerprint scanner work (if any)?
• If the phone is charging (check the battery indicator).
• Is the speaker and microphone correct?
• Is there any extraneous noise when shaking (this may indicate loose parts).

If something's not working, don't panic. Go back to the showdown and check:

• All the plumes are connected.
• Won't they get a cable out somewhere?
• Have you forgotten to install safety pads (for example, under the battery).

When is the best time to contact the service?

While the Redmi 7A is relatively easy to disassemble, there are situations where self-repair is impractical or even dangerous.

• 🔥 The battery is swelling or has visible damage.
• 💧 The phone has a liquid (even if it turns on).
• 🔌 The charging connector is not working, and you are not sure about your soldering skills.
• 📱 After disassembly, the phone does not turn on or glitch.
• 🛠️ Requires replacement of chips on the board (for example, the power controller).

The cost of repair in the service depends on the problem:

If you're in doubt, it's better to pay for repairs than to risk permanently breaking your phone, for example, mal-solding the charging connector can short-circuit and cause the motherboard to fail, which is repairing it for repair. 5000-10000 ruble.

FAQ: Frequent questions about the Xiaomi Redmi 7A disassembly