Disassembly Xiaomi Redmi 9T: a detailed guide for repairs with your own hands

Xiaomi Redmi 9T

Redmi 9T

In this article, you'll find a step-by-step photo instruction, a list of tools you need, and unique tips for disassembling the body and internal components without damage. We've taken into account typical novice mistakes, from improper heating the lid to breaking the camera plume. If you've never taken a smartphone apart, start by preparing: read the article to the end before you take on the screwdriver.

⚠️ Attention: Redmi Disassembly 9T If your device is warranty serviced, contact the service center. Also remember that lithium-ion batteries can ignite if mechanically damaged - do not puncture or bend the battery.

1. What tools will be needed to disassemble

Without the right tools, it's almost impossible to disassemble the Redmi 9T: plastic latches break, screws lick, and battery glue turns into a nightmare. Here's the minimum kit that guarantees safe disassembly:

• 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, five-pointed Y00 screw-tray SIM)
• 🔥 Dryer or thermo-air station (power from 500 W, temperature 60-80)°C for softening glue)
• 📱 Plastic mediators/blades (0.2–0.4 mm thick, metal ones cannot be used!)
• 🔋 Screen suction cup (diameter 4-5 cm, with a ring for easy grip)
• 🧲 Magnetic mat or screw container (so as not to lose small details)
• 🧴 Isopropyl alcohol (90%+) (remove glue residues from the battery)
• 🔌 Tweezers with curved ends (to detach plumes)

⚠️ Warning: Don't use knives, credit cards or other improvised tools instead of mediators! They will scratch the body and damage the plumes. Also avoid cheap Chinese screwdrivers - they often lick the screw heads.

If you are planning to replace the battery, buy a battery adhesive tape (e.g. 3M 9448A) in advance. Xiaomi's original adhesive loses its properties after removing the battery, and the nueva tape will provide reliable fixation.

2. Preparation of the smartphone for disassembly

Before you take down the Redmi 9T, take a few critical steps to keep you from losing data, shorting, and other trouble.

Mandatory action:

1. Turn off your smartphone and remove it. SIM-cards and memory card (if installed).
2. Charge the battery to 30-50% – enough for testing after assembly, but not enough to ignite in case of accidental circuit.
3. Back up your data via Settings → About Phone → Backup or using Mi PC Suite.
4. Remove the cover and protective film (if any) - they can interfere with the heating of the case.

⚠️ Attention: If the Redmi screen 9T crack, put Scotch tape or cross-stitch packaging tape on it, and it will prevent the fragments from spreading and protect against cuts. Don't heat the cracked screen with a hairdryer, which can lead to further cracking!

Turn off the phone and remove it. SIM-map|

Charge the battery to 30-50% |

Make a backup copy of the data |

Remove the cover and film |

Scotch tape on a cracked screen (if any)-->

If you disassemble your phone because of fluid, don't turn it on or plug it into a charger! First, disassemble the phone completely, flush the board with isopropyl alcohol and dry for at least 24 hours, otherwise the risk of corrosion and short circuit increases dramatically.

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

The Redmi 9T back cover is mounted on latches and glue, so it's almost impossible to remove it without heating. Follow the instructions in strict order to avoid breaking the plastic locks.

Step 1. Heat the body.

• Set the hair dryer at a temperature of 60-70 ° C (not higher!).
• Heat the lid around the perimeter for 2-3 minutes, keeping the hair dryer at a distance of 5-7 cm.
• Pay special attention to the corners - there is glue the most.

Step 2: Separation of the cover

• Stick the suction cup to the bottom of the lid (above the SIM tray).
• Pull it up carefully - a small gap should appear.
• Insert a plastic mediator into the gap and slowly lead along the edge, snapping the locks.

⚠️ Warning: If the lid fails, do not apply force! Reheat the problem area with a hairdryer.Abrupt movements will lead to cracks or a break in the plume of the fingerprint scanner (it passes under the lid at the upper left corner).

Step 3: Complete removal of the lid

• After snapping all latches, remove the lid, starting at the bottom edge.
• Don't pull it too hard, because the fingerprint scanner plume goes under the lid, and you need to carefully unplug the connector on the motherboard.

4. Battery Removal: Safety Above All

The battery in the Redmi 9T is glued to the body, and removing it is the most critical step. Wrong actions can lead to fire! Here's how to do it safely:

Step 1. Disconnect the battery connector

• With the help of a plastic blade, gently tuck the battery connector on the motherboard.
• Don’t use metal tools – they can close your contacts.

Step 2. Softening the glue

• Apply a few drops of isopropyl alcohol under the battery along the long edge.
• Wait 2-3 minutes for the glue to dissolve.

Step 3: Battery extraction

• Carefully tuck the battery with a plastic card or mediator.
• If the battery is swelling, don't puncture it! Take the phone outside and wait for full discharge (may take a few days).

⚠️ Warning: If the battery is deformed (blown, cracked), do not try to remove it yourself! Contact the service center.

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If the adhesive under the battery is too strong, use special adhesive strips for batteries (sold in repair kits), glue them to the battery, pull the hinges, this will help to evenly separate it from the body.

After the battery is removed, clean the case of glue residues with alcohol and dry for 10-15 minutes.The new battery must be original (article: MB11-00020) or certified alternative (for example, from Patona or Baseus).

5. Dismantling of motherboard and other components

Once the battery is removed, you can start removing the motherboard. In the Redmi 9T, it is mounted on 12 screws of different sizes, so it is important to remember which screw is twisted from where.

Procedure:

1. Unscrew all screws (use a magnetic mat to avoid losing them).
2. Carefully disconnect the plugs: Screen of the main and front cameras Dynamics and microphone Buttons Power / Volume

Tap the board with a plastic spatula and remove it at an angle of 30-45 degrees.

⚠️ Attention: Don't charge for the connectors! This can tear off soldered contacts. If the board is tight, check if all the screws are twisted - often users miss the screw under the tray SIM.

After the board is removed, other components can be dismantled:

• 📸 Cameras - unscrew the screws and disconnect the plumes.
• 🔊 Speaker and microphone - gently tuck them with a spatula (they are attached to glue).
• 📶 Antenna modules - glued to the cover, remove only if necessary.

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The most common mistake in disassembling the Redmi 9T is to break the fingerprint scanner plume. Always unplug the connector before the lid is removed, not after!

6. Build a phone: how to avoid mistakes

Building the Redmi 9T after repair is as important as disassembling, and here are the key points to avoid problems:

Correct sequence:

1. Set the motherboard and secure it with screws (do not pull!).
2. Connect all the plumes before fixing the board with the last screws.
3. Install the battery and secure it with a new duct tape.
4. Stick the back cover starting at the top edge (where the scanner plume is).

⚠️ Before final assembly, check the operability of all components:

• Connect the charger - the indicator should burn.
• Turn on your phone and check the sensor, cameras, speaker.
• Make sure the fingerprint scanner recognizes the finger.

If something doesn't work, take the phone apart again and check the plumes' connection.

If you have replaced the screen, do not turn on the phone immediately after assembly. Let the glue under the display dry for 1-2 hours, otherwise there may be problems with the sensor (for example, "ghost" touches).

7.Typical Redmi 9T breakdowns and their causes

Many of the Redmi 9T's problems are caused by careless disassembly or the use of unoriginal parts, and here are the most common breakdowns and their causes:

If the phone is overheating after repair, check:

• Is the radiator on the processor properly installed (it is glued to the board).
• Did the heat paste hit the neighboring components?
• Are the battery contacts closed (use a multimeter)

8. Frequently Asked Questions (FAQ)