How to Disassemble Xiaomi Redmi Note 3: The Complete Guide

The decision to disassemble the Xiaomi Redmi Note 3 is often inevitable when the device stops holding a charge, the display crashes or the charging connector needs to be replaced. This device, released several years ago, is still popular due to its reliability, but time takes its toll, and consumables require attention. Self-intervention saves a significant amount of money that service centers ask for work, but requires accuracy and understanding of the internal device.

The dismantling process is not a very complex one, but there are some nuances in the design that are specific to the metal body of this model. Incorrect actions can damage the plumes or create backlashes after assembly. In this article, we will look at each step in detail, from tool preparation to final health checks, so that you can perform the repairs in a quality and safe manner.

Before you start physically disassembling, you need to understand the risks associated with lithium polymer batteries. Any damage to the sealed shell of the battery can lead to ignition, so all manipulations are carried out at your own risk. Safety is the number one priority, and disregarding the rules of operation with electronics is unacceptable.

Preparation of the workplace and tools

The success of any repair operation depends on 80% of the preparation. You will need not only a set of screwdrivers, but also specific tools to work with glued structures. The standard toolkit of the master includes cross screwdrivers size PH000 and PH00, plastic spatula (mediator), sucker and tweezers with curved ends.

Special attention should be paid to lighting and space organization. Small screws are easily lost, and plumes are easy to break when viewed poorly. It is recommended to use a magnetic mat or container with cells to sort the fastener by disassembly stages. It is also not superfluous to prepare a heat source, such as a hair dryer or a special heating pad, since the display module in Redmi Note 3 is planted on glue.

⚠️ Warning: Before starting any work, be sure to completely turn off the device. Attempting to disconnect the battery plume when power is on can lead to a short circuit on the board and the power controller fails.

To heat the edges of the screen, use a temperature no higher than 80-90 degrees Celsius. Overheating can damage the matrix or cause the battery to bloat if the heat is transmitted too intensively. Keep isopropyl alcohol on hand, which will help dissolve the glue if mechanical action is insufficient.

Removal of the back cover and protection of the board

Unlike many modern smartphones, the Xiaomi Redmi Note 3 has a non-removable back cover in the classic sense, but it is not glued, but fixed by screws. This simplifies the initial stage, but requires care when unscrewing. There are 10 screws on the ends of the device that need to be unscrewed first.

Once all the screws are removed, don't try to pull the lid sharply. There may be plastic latches around the perimeter that are easy to break when handled carelessly. Use a plastic card or a shoulder blade to gently walk along the junction of the case and snap the locks. The movements must be sliding, without excessive force.

When you take the metal panel off, you'll see a black plastic cap covering the main board, and it's also attached to several screws, and underneath it, you'll find the motherboard and the plume connection points, and you'll be able to unscrew the plug fixture carefully and remove it, opening the insides of the smartphone.

• 🔧 Twisted 10 screws around the perimeter of the body, paying attention to their length.
• 📱 Click the back cover with a plastic spatula, starting at the bottom corner.
• 🛡️ Remove plastic protection of the main board by unscrewing the fixing screws.
• 🔍 Visually inspect the charge for oxides or obvious damage.

Battery shutdown and board dismantling

The first step after you open up the hardware is to turn off the device. Find the battery connector on the board and gently disconnect it. In Redmi Note 3, this connector can be quite tight, so use a plastic blade or nail, avoiding metal tools to avoid closing contacts.

Then you have to turn off all the plumes that go to the main board, which is the plume of the display, touchscreen, front and rear cameras, and the plume of the bottom plume (with buttons and a microphone), the plumes are very delicate elements, they can not be pulled on the flexible part itself, only on the thickened connector.

Once all communications are turned off, unscrew the screws that hold the board itself. The number can vary depending on the modification, but usually there are about 4-6 pieces. Carefully remove the board, lifting it first on one side, then on the other, so as not to damage the antenna contacts.

When you remove the board, pay attention to the location of the vibrator and speaker, which in some cases may interfere with the free exit of the board, and they will have to be temporarily pushed back or also turned off, the main thing is not to put too much effort, because the texture of the board is fragile.

Replacement of the battery and work with glue

The battery in Xiaomi Redmi Note 3 takes up a significant part of the internal volume and is attached to bilateral tape. Over time, the glue dries, but often the battery is held tight enough. To extract, heat the back of the smartphone (where the battery is) with a hairdryer to a warm state, approximately 50-60 degrees.

Using a suction cup in combination with a plastic card or a special line allows you to separate the battery from the case. By holding a line or a map after a battery, you cut off the adhesive layer. It is strictly forbidden to use metal tools to tamper with the battery, since a puncture of the shell is guaranteed to cause fire.

After removing the old battery, clean the seat of the old glue residue. The new battery should be equipped with fresh strips of double-sided tape for secure fixation. When installing a new battery, make sure that the battery plume is not squeezed and lies exactly in the designated channel.