Xiaomi Mi Max 3 has proven itself as a reliable device with a huge screen and a powerful battery, but even the best equipment over time requires repair. Most often, owners face the need to replace a broken display, worn-out battery or charging module. Self-disassembly of the gadget can seem difficult, but with the right tools and knowledge, this process becomes quite feasible even for beginners.
The main difficulty of the Xiaomi Mi Max 3 design is its monolithic body, where the back cover is glued to a special sealant, which provides protection from dust, but significantly complicates access to internal components.
In this guide, we will take a detailed look at each step of dismantling, from heating the case to turning off the motherboard. Importantly, before starting work, be sure to turn off the device, since the battery in this model does not detach from the motherboard until the rear panel is completely removed.
Preparation of the workplace and necessary tools
A high-quality disassembly of any modern smartphone is impossible without a specialized tool. Using knives, pins or other improvised means can lead to irreversible damage to the body and internal components. To work with the Xiaomi Mi Max 3, you will need a minimal but effective set.
Special attention should be paid to the organization of the workspace. The surface should be clean, well-lit and preferably antistatic or metallic. Small screws are easily lost, so prepare a magnetic mat or containers with sections to sort the fasteners by dismantling stages.
Here is a list of tools that are necessary to successfully complete the task:
- 🔥 A hair dryer or heating platform to soften the glue under the back cover.
- 💳 Plastic cards or mediators for neat opening of the case without scratches.
- 🪛 Set of screwdrivers (cross-crosses) PH000, PH00) for twisting screws of different lengths.
- 🧲 Tweezers with curved ends for extracting small details and working with plumes.
- 🧴 Isopropyl alcohol or special liquid B-7000 glue-removal.
☑️ Checking readiness for repair
Do not forget about the safety of heating appliances. The hair dryer should not be held too close to the glass to avoid cracking from local overheating. The heating temperature should not exceed 80-90 degrees Celsius, which usually corresponds to the average mode of operation of a household hair dryer.
Removal of the back cover and primary dismantling
The first and most important step is to separate the back glass panel from the metal frame. Unlike the budget models, the Xiaomi Mi Max is a very important step. 3 It has no hidden screws under plugs, the entire perimeter is held on adhesive basis. 2-3 minute.
⚠️ Warning: Don't try to lid the lid immediately after heating. Give the glue a couple of seconds to soften, but don't let it cool. If you feel strong resistance, repeat the heating procedure so that the glass doesn't break.
After enough warming up, insert a suction cup at the bottom of the back cover, closer to the edge, and pull up slightly, creating a small gap. In the resulting gap, carefully insert a plastic card or mediator. Movements should be sliding, parallel to the plane of the screen, to cut the glue, not break the glass.
Drive the instrument around the perimeter, paying special attention to the corners and areas around the camera module where the adhesive layer may be thicker. After passing through a circle, the back panel should easily separate. Be careful: the fingerprint scanner plume can be glued to the inside of the cover, although in the Mi Max 3 it is more often displayed on a separate connector.
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If you don't have a suction cup, you can use a strong floss or dental floss, and you can put it in the corner and you can use the sawing movements to gently cut the adhesive layer around the perimeter.
Once the lid is removed, you will have access to the insides, but do not rush, first of all, you need to turn off the battery to turn off the device and eliminate short circuits when you continue to work with electronics.
Disconnecting the battery and removing protective screens
The interior of the Xiaomi Mi Max 3 is quite dense, the battery occupies the bottom, and the upper part is the motherboard, closed with black protective screens. To access the battery connector, you need to dismantle the plastic decorative bar located at the top of the case, which also covers the connectors of the main plumes.
Carefully unscrew all the visible screws that lock plastic and metal clamping slats. The screws can be of different lengths, so it's recommended to lay them out in the order in which they were removed. When you take off the slats, you'll see connectors connected to the motherboard.
Use a plastic blade to turn off the battery. Metal tools are undesirable here, as there is a risk of damaging the contacts or puncture in the battery itself, which can lead to fire. Smoothly pull the connector up until it comes out of the connector.
Now that the device is de-energized, you can start removing the metal shields that cover the main circuits of the board, which are usually mounted on a lot of small perimeter screws, and when they are removed, you can access the communication modules, the processor and other critical elements.
Why do you need metal screens?
Dismantling of the display module and the main board
If your goal is to replace the screen, after turning off the battery and removing the protective slats, you need to disconnect the display plumes. The Xiaomi Mi Max 3 uses IPS technology, and the module can be glued to the frame or held on the latches depending on the revision.
Removing the board often requires removing the top of the body, carefully disconnect the main and front camera plumes, as well as the tail of the lower speaker (audible). The cameras in modern smartphones are very fragile, they should be taken only by the ends of the module, avoiding touching the lenses with your fingers.
The sequence of actions when extracting the fee:
- 📷 Turn off camera plumes and carefully remove modules from seats.
- 🔌 Disconnect antenna cables (coaxial wires) if they interfere with board lifting.
- 📱 Lift the motherboard, controlling so as not to hook the plumes going to the bottom of the case.
- 🧩 Remove the board by accessing the space underneath it where screen frame screws often hide.
In some cases, replacing the display requires a complete dismantling of the metal frame (the middle part of the body), to do this, twist all the screws around the perimeter and internal screws hidden under stickers or rubber plugs, after which the frame with the screen is separated from the rear of the body (which we have already removed).
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The main difficulty of replacing the screen in the Mi Max 3 is the need to remove many small screws and neat work with long plumes, which are easy to break if unwary extraction.
Replacement of the battery and lower plume
The large 5500mAh battery capacity is the pride of the Xiaomi Mi Max 3, but it loses its life over time.The battery replacement in this model is complicated by the fact that it occupies almost the entire bottom of the body and is planted on double-sided tape.
To remove the old battery without damaging it (which is strictly forbidden because of the risk of ignition), use special hood strips, if they are preserved, or gently poke the battery with a plastic card, preheating the lower part of the body with a hairdryer.
Often, with the replacement of the battery, the lower charging plume is required to be replaced, since the Micro-USB or USB-C connector will be unshattered over time. This plume can also serve as an antenna, so its tight fit to the housing is critical for communication quality.
| Component | Difficulty replacing | Risk of damage | The necessary tool |
|---|---|---|---|
| Back cover. | Medium | Tall (glass) | Fryer, sucker. |
| Battery | Tall. | Critical (bloating/fire) | Fur, plastic spatula |
| Display module | Tall. | Tall (trains) | Sets of screwdrivers, tweezers |
| Maternity fee | Medium | Medium (connectors) | Dielectric blade |
When installing a new battery, make sure the connector sits tightly in the connector on the board. If you change the bottom plume, check for all sealing rubber bands that provide dust protection in the charging port area.
Assembly of the device and check of performance
The Xiaomi Mi Max 3 is assembled in reverse order, but requires even more care. Before the final twisting of the screws and sticking the back cover, an initial check of the operability of all systems is necessary.
Connect the battery and the display plume, then press the switch on. If the smartphone is switched on, check the touchscreen (passing your finger over the entire surface), the vibrator, speakers and microphone. Also make sure the smartphone sees SIM-map and charge.
If all systems are working correctly, you can start the final assembly. Turn off the device, turn off the battery (if checked on), put all the plumes in your channels so that they do not get pinched. Twisted all the screws, observing the force so that you do not break the thread in the metal case.
To stick the back cover, use a special B-7000 glue or a pre-sticked adhesive frame. Apply a thin layer of glue around the perimeter, press the lid and lock the device with rubber bands for 15-20 minutes before the initial grip.
⚠️ Warning: Do not turn on the phone immediately after assembly if liquid glue has been used. Let it dry according to the tube instructions (usually). 1-2 o'clock) so that the adhesive vapors do not settle on cameras and sensors.