How to disassemble Xiaomi Redmi 9 with NFC: step-by-step instructions with photos and expert tips

Xiaomi Redmi 9 with NFC

In this article, you will find detailed instructions for disassembling the Redmi 9 with NFC, taking into account all the nuances of the model, from removing the back cover to removing the motherboard, we will tell you what tools you will need, how to avoid typical errors (for example, damage to the plume of the fingerprint scanner), and what to do if the screws are “rigged”, and also give tips on diagnosing faults before disassembly, so as not to waste time.

If you've never taken a smartphone apart before, don't worry: Redmi 9 is a device with medium disassembly complexity, patience and accuracy are the key, but remember: self-repair is not warranty (if it's still valid), so weigh the pros and cons before you start.

Preparation for disassembly: tools and security measures

Before you start, make sure you have everything you need, and not even one tool can make a showdown a pain.

• 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, five-pointed Y00 screw-tray SIM)
• 📱 Plastic mediators/blades (2-3) for body separation
• 🔥 Dryer or thermo-air station (to soften the glue under the cover)
• 🧲 Magnetic mat or screw tray (so as not to lose)
• 🔋 Suction cup (helps to remove screen if glue is too strong)
• 🛠️ Tweezers (for small details)

Also, prepare the workplace: it should be well lit, draft-free (dust can get inside the phone) and with enough space for laying out parts. Redmi 9 with NFC has 15 screws of different sizes - if you confuse them with places, the case can loosely close or damage the thread.

⚠️ Warning: If the phone has been in water or a humid environment, don't turn it on until completely disassembled and dry! A short circuit on the board can disable the power controller.

Before disassembly it is necessary:

1. Turn off the phone and remove the SIM- memory card.
2. If the battery is swelling, don't try to puncture it! It can cause fire. Use safety glasses and gloves.
3. Photograph the location of the screws and plumes at each stage – this will simplify the reverse assembly.

Step 1: Removing the back cover

The back cover of the Redmi 9 with NFC is attached to glue and latches. To remove it, you need a thermo-air station or a hairdryer. Do not use an open fire (lighter, alcohol) - this will melt the plastic!

Instructions:

1. Heat the edges of the cover with a hairdryer (temperature ~60–70°C) for 2-3 minutes, evenly driving around the perimeter.
2. Insert the plastic mediator into the gap between the lid and the frame (start with the lower left corner where the charging connector is located).
3. Carefully drive the mediator along the body, separating the latches. Do not force - if the lid does not respond, warm up again.
4. When all the latches are snapped, remove the lid. Be careful, it's got a fingerprint scanner plume stuck to it!

If the cover is too tight, check:

• Is the mediator point-to-point in the latch?
• Have you overheated your plastic (it should be warm, but not hot)?
• Are there any undetached areas (especially in the area of the chamber) left?

Step 2: Disconnect the battery and remove the motherboard

When you take the lid off, you'll see the battery covered with black film. First rule: before you manipulate the board, you have to turn off the battery.

1. Put a plastic mediator in the battery connector (the white connector at the top of the battery).
2. Carefully disconnect it from the board by pulling the tongue (do not pull the wires!).

Now we can start to extract the motherboard.

1. Unscrew all screws that fix the metal screen of the board (usually 8-10 pieces).
2. Disconnect the plumes: 📞 Display plume (right side of the board) 🔊 Speaker and microphone plume (bottom) 📷 Main camera plume (top left corner)

Carefully tuck the board with a plastic spatula and remove it.

At this point, many people are faced with the problem of "stiff" screws.

• Drink alcohol or WD-40 on it and wait 5 minutes.
• Use a magnetic-tipped screwdriver.
• If the thread is broken, don't try to twist it out by force. It's better to drill the screw out and replace it with a new one.

Step 3: Battery Replacement – Nuances for Redmi 9 with NFC

The battery in Redmi 9 with NFC has a capacity of 5020 mAh and is attached to double-sided tape.

1. Put a plastic shoulder blade on the battery from any angle.
2. If it does not give in, warm up the body with a hairdryer (not higher than 80 ° C!) - this will soften the glue.
3. Carefully pull the black tongue (pull-tab) under the battery. If it is not, use a thin guitar string or nylon thread, squeezing it under the battery.

Attention to details:

• 🔋 The new battery must have the same connector (4 pins). Original article: MB10001.
• 🔌 Before installation, clear the board contacts from alcohol oxidation.
• 📏 Make sure the new battery is no thicker than the old one or the lid won't close.

If the battery is swelling, do not try to discharge or puncture it! Dispose of according to local rules (at the electronics reception points).

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After you change the battery, calibrate it: fully charge the phone, then discharge it to 0% and recharge it to 100%, which will extend the life of the new battery.

Step 4: Disassemble the screen and replace the display

The Redmi 9 NFC screen consists of three layers: touch glass, display and bezels. If only glass is cracked, you can replace it separately, but this requires special equipment (laminator). In most cases, it is easier to change the entire display module.

To replace the screen:

1. Warm up the display edge with a hair dryer (temperature ~70°C) for 3-5 minutes.
2. Subdue the screen with a plastic blade, starting from the bottom edge (where the plume connector is located).
3. Carefully separate the sensor from the body, making sure not to break the plume.
4. Disconnect the display plume from the board and remove the old screen.

When installing a new screen:

• 📱 Make sure the plume is not twisted.
• 🔧 Secure it with screws (do not pull!).
• 🎨 If the adhesive on the frame is dried, apply a new double-sided tape 3M (thickness ~0.2 mm).

⚠️ Warning: If colored stripes or artifacts appear after the screen is replaced, check: The density of the plume to the connector. The integrity of the plume itself (whether there are tears) The matching screen model (for Redmi 9 with NFC only fits JD9364 or JD9366).

Step 5: Diagnostics and Replacement of speaker, microphone, charging connector

If the phone doesn't make sound, doesn't hear the other person, or doesn't charge, the problem can be in these components, which are easier to replace than cameras or boards, but require care.

Speaker and microphone:

• 🔊 The speaker is at the bottom of the board. Disconnect the plume and remove it with a spatula.
• 🎤 The microphone (the two are the main one and the noise cancellation) is attached to the glue. Warm up with a hair dryer and take it off carefully.

Charging connector (Type-C):

1. Unplug the old connector (a soldering station with a temperature of ~350 ° C is required).
2. Clear contact areas from soldering with a brazing brazing.
3. Install a new connector (article: MB10003) and solder, observing polarity.

If the connector still does not work after replacement, check:

• 🔌 Integrity of tracks on board (use a magnifying glass).
• 🔋 Voltage at the battery contacts (should be ~3.7–4.2V).
• 🛠️ Power controller status (PM660 on board).

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If the phone does not charge after replacing the connector, in 80% of cases the problem is in the power controller or the fuse that has burned out (the F1 marking next to the connector).

Reverse Assembly: How to Avoid Mistakes

Building a phone is often harder than disassembling. Here are the key points for the Redmi 9 with NFC:

1. The fingerprint scanner plume: It should be flat, without any inflections, and if the scanner doesn't work after assembly, check if it's got any debris.
2. Screws: Use only the ones that were in their seats. Camera and board screws are not interchangeable!
3. Cover glue: If the original adhesive has lost stickiness, use the B-7000 or 3M VHB (applied with a thin layer).
4. Check before closing: plug in the battery and turn on the phone to make sure everything is working (sensor, cameras, speaker).

Typical errors in assembly:

If the phone does not turn on after assembly:

1. Check if the battery is connected.
2. Make sure the board sits tightly in the grooves.
3. Connect to charging – if the indicator is on, the problem may be in the power button.

FAQ: Frequent questions about the dismantling of Xiaomi Redmi 9 with NFC