How to disassemble the smartphone Xiaomi Redmi 7: a complete guide with photos and secrets of the masters

Xiaomi Redmi 7 is one of the most popular budget smartphones of 2019, but even it is not immune to breakdowns. Does the screen react to touch? Does the battery swell? Does the speaker stop working? In most cases, repair requires disassembling the device. However, improper dismantling can lead to damage to the plumes, disconnection of contacts or even complete failure of the phone.

This article is not just a guide, but a practical guide from the service center masters who take apart dozens of Redmi 7s every day. Here you will find: a step-by-step algorithm with a photo, a list of necessary tools, unique tricks for difficult moments (for example, how to remove a glued battery without damage), as well as warnings about typical mistakes that beginners make. If you have never held a screwdriver for your phones, this guide will help to avoid fatal miscalculations.

Preparation for disassembly: what you need to know before the beginning

Disassembling the Xiaomi Redmi 7 is a process that requires not only accuracy, but also understanding the design of the device. This smartphone is assembled on 10 screws (including hidden under stickers), has fragile display and camera plumes, and a glued battery that can swell or catch fire if you carelessly handle it. Before you start, answer three questions:

• 🔧 Do you have any experience with small electronics? If not, practice on an old phone or watch video demos.
• 🛠️ Are all the tools ready? A regular screwdriver won't work, you need specialized tools (list below).
• ⚡ Is the battery charged to 30-50%? Fully discharged or recharged battery is more dangerous in handling.

If you're disassembling a battery replacement phone, display or speaker, order original parts in advance. Cheap Chinese stores often have incompatible connectors or poor soldering quality. For example, a non-original display plume may not support Always On Display, even if it looks identical.

⚠️ Warning: If your Redmi 7 was in a damp environment or fell into water, disassembly can be dangerous! corrosion on the board or oxidized contacts can be closed when mechanically exposed.

Tools required: full checklist

Without the right tools, you can't disassemble the Redmi 7 -- you'll either damage the body or you'll tear the screws off.

In addition, it may be necessary to:

• 🔥 Dryer or thermo-air station - to soften the glue under the screen (temperature) 60-80°C).
• 🧲 Magnetic mat - so as not to lose screws (in Redmi 7 they are of different lengths!).
• 📸 Smartphone to capture the process – take pictures of each step so as not to confuse the order of the assembly.

If you are planning to replace the battery, you will need a special glue (for example, B-7000) or double-sided tape to fix the new battery. Do not use superglue or paper tape - they will not provide reliable fastening and can damage the contacts.

Step-by-step dismantling of Xiaomi Redmi 7: from the lid to the motherboard

Now, to the most critical stage, follow the instructions in strict order, and skipping the steps can damage the plumes or the board.

Step 1: Removing the back cover

1. Turn off the phone and remove the tray for SIM-map.

2. Heat the back cover with a hair dryer (60-70°C) around the perimeter for 2-3 minutes. This will soften the glue. Don't overheat! Temperatures above 80°C can damage the plastic.

3. Insert the plastic mediator into the gap between the lid and the frame (start at the lower left corner where the SIM tray is located). Carefully drive the mediator along the body, separating the lid. If you feel resistance, heat the problem area again.

Step 2: Unscrew the screws and remove the protective screen

1. Once you remove the lid, you'll see 10 screws (9 under the Torx T3 screwdriver and 1 under the Phillips #00, which is under the sticker near the battery). Remember the location of each screw! The screws of different lengths — if you confuse it, you can damage the board.

2 Carefully remove the metal screen covering the insides. It may be glued — put it on the mediator.

💡

Take a picture of the screws before you unscrew them, and when assembled, it saves you an hour of time and eliminates the risk of short circuit.

Step 3: Battery disconnection

This is the most dangerous phase. The battery in Redmi 7 is glued to the board and connected to it through a fragile plume.

1. disconnect the battery connector with a flat screwdriver (punch by the edge, without touching the contacts).

2 If the battery is swelling, don't try to remove it by force! Pour the isopropyl alcohol under the battery and wait 5-10 minutes for the glue to dissolve. Then gently tuck it in with a plastic spatula.

⚠️ Warning: If the battery is deformed (bloating more than 2 mm), do not use metal tools - the risk of puncture and fire is extremely high.

Step 4: Withdrawal of the motherboard

1. Disconnect all the plumes: the display, the cameras, the speaker, and the power/volume buttons. They're latched, and you pick them up with a screwdriver.

2. Unscrew the remaining screws that lock the board. Gently lift it over the edge. If the board is "stiff" - do not pull! Warm up the area around the processor with a hairdryer (maximum 60°C) and try again.

💡

The display plume in Redmi 7 is the most vulnerable. If it's damaged, the screen will work but not respond to touch. Always unplug the plume by the edge, not pull by the middle!

Common Mistakes in Disassembly and How to Avoid Them

Even experienced craftsmen sometimes make mistakes. TOP-5 The errors that cause the Redmi 7 to fail:

• 🔩 Tangled screws. Rotors of different lengths: short ones for lid attachment, long ones for motherboard, and if you screw a long screw into a short screw, it will go right through and damage the board.
• 🔥 Overheating when screening. Temperature above 80.°C deforms the adhesive base of the display, and after assembly, "waves" will appear on the screen.
• ⚡ Short circuit. You can only touch the board contacts with metal tools when the battery is off.
• 📱 It's a damage to the plume of the display. It's under the battery -- many newcomers hit it when they take the battery off.
• 🔋 Even a small damage to the battery shell can cause a fire in a few days.

To minimize the risks, follow two rules:

1. Never rush.Redmi's average disassembly time 7 beginner — 40-60 If you're in a hurry, you'd better postpone the repairs.
2. Check each step. Once the plume is unplugged, make sure it's not broken; after the screw is unscrewed, it won't bend.

How to disassemble the screen Xiaomi Redmi 7 (if you need to replace the display or touchscreen)

Replacing the screen is one of the hardest things to do. In Redmi 7, the display is glued all around the perimeter, and the touchscreen plume goes through the middle of the case. If you've never done this before, practice on a non-working phone or watch a video of the disassembly of this particular model (for example, from Xiaomi Repair's YouTube channel).

Algorithm of action:

1. Heat. Warm up the screen with a hair dryer (70-80°C) around the perimeter for 3-5 minutes. Start at the bottom of the plume.
2. Lift the screen. Raise the display 1-2 mm with a suction cup. Insert plastic mediators into the resulting gap (no deeper than 3 mm so as not to damage the plume!).
3. Glue separation. Slowly move the mediators along the frame, separating the screen and the body. If the glue doesn't lend itself, heat the problem area again.
4. Disconnect the plume. When you take the screen off, disconnect the touchscreen and the display. They're latched, pick them up with a screwdriver.

⚠️ Attention: In Redmi 7, the touchscreen and display plume are combined into one unit, but have two connectors on the board. If the screen is working after the replacement and the sensor is not, check if the second connector is connected (it is smaller and located on the right).

When installing a new screen:

• 🖥️ Use the original glue (for example, LOCA for OLED-screen-scotch 3M 9448A for LCD).
• 🔍 Before gluing, remove all dust particles from the frame and screen – they will be visible after assembly.
• 🌡️ Heat the new screen before installation (40-50°C) - this will improve adhesion of the glue.

Building a phone: how to avoid mistakes

Building a Redmi 7 after disassembly is as much a challenge as disassembling.

1. Check the plumes. Make sure all the plumes (display, cameras, speaker) are tightly inserted into the connectors. Even a microscopic gap can lead to a module that is not working.
2. The screws are twisted. Follow the pattern you took before disassembly. The screws around the chamber should be shorter than the circuit board screws!
3. Test. Connect the battery and check: 📱 Does the screen and sensor work. 🔊 Is there sound in the speaker and microphone. 📷 Does the main and front cameras work. 🔋 Is the phone charging (plug in charge).

Sealing.

If the phone does not turn on after assembly:

• 🔋 Check if the battery is connected (sometimes the connector leaves when installing the board).
• 🔌 Make sure the power button doesn’t go off (check its plume).
• 🔧 Check all screws - sometimes an untwisted screw closes the contacts.

💡

If you're building the screen and you're flashing or you're getting artifacts, it's likely that the plume is damaged or not fully inserted. Take the phone apart and check the contacts.

Frequent faults Redmi 7 and how to fix them during disassembly

Xiaomi Redmi 7 has several "diseases" that often require disassembly, and here are the most common ways to eliminate them:

If your problem is not on this list, look for the cause by eliminating:

1. Check if the function is operating in safe mode (hold the power button → Safe Mode) and if so, the software problem.
2. Connect the phone to the computer, and if it detects a malfunction in the screen or plume.
3. Call the main circuits (power, charging, buttons) with a multimeter.

FAQ: answers to frequent questions about the dismantling of the Redmi 7