How to Disassemble Xiaomi Redmi 7A: detailed instructions with photos and nuances

Why to Disassemble Redmi 7A and What to Know Before You Start

Xiaomi Redmi Smartphone 7A — One of the brand's most popular budget devices, but even it's not immune to breakdowns, and disassembly of the device may be needed to replace the battery, clean up dust, repair plumes, or even upgrade internal memory. However, improper dismantling often results in damage to plumes, cracks in the case, or loss of warranty (if it is still in place).

This guide will help you to understand Redmi. 7A And it's a little bit risky, but remember, even if you do it carefully, you don't get 100% success, and the glue under the back of this smartphone, for example, loses its elasticity over time, and if you do it carelessly, you can tear off the antenna contacts. If you’ve never taken down a smartphone, work out on an old device or watch video disassemblies before work.

In the article you will find:

• 🔧 List of necessary tools (and how to replace them in the last resort).
• 📸 Step-by-step process of disassembling from the photo key stages.
• ⚠️ Typical mistakes and how to avoid them (for example, why you can not pull the plumes).
• 🔄 Tips for reverse assembly so that there are no extra screws left.

Redmi disassembly tools 7A: what's needed

Without the right tools to disassemble Redmi 7A It's almost impossible -- a plastic blade or knife will damage the body, and an inappropriate screwdriver will rip the screws off:

• 🔩 Torx bit screwdriver set T3 and Phillips PH00 (redmi 7A both types).
• 📱 Plastic mediator or suction cup to remove the back cover (metal tools scratch the body).
• 🧲 Magnetic mat or container for screws – they are easy to lose, and in a smartphone there are 12 pieces.
• 🔥 Hair dryer or thermoplatform (optional) – if the glue is too strong, it should be heated to ~60°C.
• 🧴 Isopropyl alcohol (90%+) — Cleaning contacts and removing glue residues.

If there are no specialized tools, alternatives can be used, but with caution:

• Instead of a mediator, a plastic card (but not a credit card, it is too thin).
• Instead of a suction cup, a scotch tape pasted on the lid (but it can leave traces).
• Instead of the thermoplatform – hair dryer at minimum power (do not overheat above 70).°C!).

⚠️ Warning: Don't use knives, scissors or metal spatulas - they will damage the antenna tracks under the lid. 7A They are located on the perimeter and easily break.

Turn off your smartphone and remove it. SIM-memory-card|

Make a backup of the data (disassembly may result in a reset)|

Prepare a workspace with good lighting |

Check for all the tools in the list above|

Take a photo of the smartphone before disassembly (useful for reverse assembly)-->

Step 1: Removing the back cover is the most important step

Redmi back cover 7A It's stuck around the perimeter, and it's stronger than you think, and the first mistake that newcomers make is to try to tear it away by force:

• 💥 Cracks on plastic (especially in corners).
• 📡 Damage to antenna contacts (they are glued to the cover).
• 🔋 Breaking the battery plume (if you pull the lid too sharply).

The correct algorithm:

1. Warm up the edges of the lid with a hair dryer (1-2 minutes, keeping at a distance 10 The glue will become elastic.
2. Suction or tape slightly lift the lid at the charging connector (there is less glue).
3. Insert a plastic mediator into the resulting gap and carefully lead along the edge, separating the glue.
4. Do not rush - the glue is stronger at the corners, so they need to be warmed up longer.

If the lid doesn't lend itself:

• 🔥 Raise the temperature to 70.°C (but not higher!).
• 💊 Drain isopropyl alcohol into the slit - it dissolves the glue.
• ⏳ Wait. 5-10 minutes and try again.

⚠️ Note: Do not insert the mediator deeper. 2-3 mm -- under the lid are the camera plumes and the fingerprint scanner!

Step 2: Shutting down the battery – why it’s critical

Once the lid is removed, the first thing you need to do is turn off the battery. 7A It's plugged in through a connector. JST 1.0 (a small white connector) Why it matters:

• 🔌 Short circuit when working with a screwdriver can burn the motherboard.
• 💥 The battery can swell if it is accidentally pierced.
• 📱 Some plumes (such as touchscreen) are sensitive to static electricity.

How to turn off the battery:

1. Find the battery connector - it is located at the bottom of the board, next to the vibration motor.
2. Carefully tuck the connector with a plastic spatula (not metal!).
3. Take the plume aside and fasten it with tape so it doesn't touch the contacts.

If the connector fails:

• 🔥 slightly warm the board with a hair dryer (do not direct hot air to the battery!).
• 💧 Dragging alcohol on the connector - this will reduce friction.

💡

If the battery is swelling, don't try to disassemble it yourself! Wrap your smartphone in plastic and take it to a service center. Lithium batteries can ignite if damaged.

Step 3: Dismantling the motherboard and plumes

Once the battery is turned off, you can start removing the board. 7A It's mounted on 10 screws (of different lengths!) and a few latches:

• 🔧 Remember the location of the screws - if confused, you can damage the fee.
• 📸 Take photos of each stage, especially before the plumes are turned off.
• 🧲 Use a magnetic mat - screws in Redmi 7Atiny and easily lost.

Procedure:

1. Unscrew all the screws (start at the corners, then the center). 7A 3 mm and 4 mm long screws are used - do not confuse!
2. Carefully tuck the board into a plastic spatula, which can stick to the heat paste on the processor.
3. Turn off all the plumes: 📷 Main camera plume (black connector next to antenna). 🔊 Dynamic plume (white connector at the bottom of the board). 📱 The plume of the touch screen (the widest, at the top of the).

Typical problems at this stage:

• 🔧 Torn screws – if the screwdriver slips, use rubber band for better grip.
• 🔌 Teared plumes – never pull the wires, just the connectors!
• 🔥 Overheating of the board – if you use a hair dryer, do not direct it to the chips.

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Screws at Redmi 7A If you put a long screw in the hole for a short one, you can damage the board or the battery!

Step 4: Disassemble additional modules (camera, speaker, buttons)

Once the board is removed, you can start dismantling the remaining components. 7A They're attached differently:

• 📷 Main camera - screwed with two screws and glued to the body.
• 🔊 Dynamic - is held on latches, but its plume is very fragile.
• 🔘 Volume and power buttons – inserted into the slots, they need to be pushed from below.
• 📡 Antenna modules - glued to the cover, removed only when it is replaced.

Disassembly features:

• You can't pull the plume, it's coming off the board. First, unscrew the screws, then gently lift the module.
• Dynamics at Redmi 7A It often sticks in the grooves, and you can use a plastic spatula or tweezers to extract it.
• The volume and power buttons are mounted on silicone shock absorbers. Don't lose them when you build them.

If you need to replace the charging connector:

1. Then, put the old sleeve down and put it in the back.
2. Clear the contacts with alcohol.
3. Seal a new connector, making sure that all contacts are in contact with the fee.

⚠️ Attention: At Redmi 7A The charging connector often fails due to moisture. If the smartphone is not charging, check the contacts with a multimeter before replacing.

Reverse Assembly: How to Avoid Mistakes

Put together Redmi. 7A After repair, it's as important as taking apart:

• 🔋 Forgotten disconnected plume (for example, touch screen – then the screen will not respond to touches).
• 🔧 Skewered screws – if the board doesn’t fall flat, check if all screws are swirled.
• 📡 Unadhesive antenna contacts – this will worsen the signal network and Wi-Fi.

Proper assembly order:

1. Make sure all plumes are connected and not bent.
2. Put the charge in place and twist the screws (start with the corners).
3. Connect the battery and check the operability before installing the cover:

3M 9448A

Press the lid and warm up with a hair dryer for better fixation.

If something doesn’t work after the assembly:

• 🔍 Check the connection of the plumes (especially the touchscreen and battery).
• 🔧 Check the screws – sometimes they close the contacts.
• 📱 Reset the settings to factory (possibly lost software).

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Before final assembly, wipe the contacts of the battery and board with alcohol - this will improve the connection and prevent accidental reboots.

Redmi's frequent breakdowns 7A and how to prevent them

Redmi 7A — A reliable smartphone, but it has “weak points” that often break when disassembling:

If you're taking Redmi down 7A For prevention (for example, to clean the dust), do this once in a while. 1-2 Frequent disassembly increases the risk of breakdowns.

FAQ: Answers to Frequent Questions About Redmi Disassembly 7A