How to disassemble the remote from the Xiaomi TV: safe instructions with photos and tips

Why you might need to take out the Xiaomi remote TV

Remote control from Xiaomi TVs (Mi series) TV 4/4A/4S/5, Redmi Smart TV And so on. "" They usually last for years without any complaints. "" But even they're not immune to breakage: buttons stick, infrared transmission stops working, or the battery that needs to be replaced just goes out. 80% In cases of remote repair, it is cheaper to buy a new one, especially if we are talking about models with voice control or Bluetooth connection.

The main reasons for disassembly:

• 🔋 Replacement of a dead battery (especially important for remotes with lithium cells) CR2032 or CR2026)
• 🎛️ Cleaning button contacts from oxidation or dirt
• 🔧 Repair/replace broken buttons or chips
• 📡 Diagnostics of malfunction of the IR transmitter or Bluetooth module
• 🔄 Modding (for example, setting up lights or flashing to work with other devices)

It’s important to understand that Xiaomi remotes come in two types: infrared (IR) – working through a transmitter lens (usually black) and Bluetooth – synchronizing with a TV over a wireless network. Disassembly of each type has nuances, which we will discuss below.

Preparation for disassembly: tools and precautions

Before you start, make sure you have everything you need. Xiaomi doesn't need professional tools to disassemble the remote, just what you'll find in every home.

• 🔧 Plastic blade (or mediator) - for careful undermining of the body
• ✂️ Thin screwdriver (cross or flat, size) PH00 1.5 mm)
• 🧲 Magnetic substrate or saucer – so as not to lose small details
• 📸 Smartphone – for photographing the process (useful when reassembling)
• 🧴 Alcohol/Cologne and Cotton Swabes – for cleaning contacts

If you plan to solder or replace chips, additionally prepare: soldering iron (20-30 W), solder, flux and multimeter for checking chains.

⚠️ Warning: Do not use metal screwdrivers to smear the body, they leave scratches and can damage the latches. If there is no plastic blade, wrap the edge of the screwdriver with a seal.

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Before disassembling, check the remote with your smartphone camera: point the remote to the camera and press any button. If you see an IR signal flickering on the screen, the problem is not with the transmitting module, but with the buttons or the battery.

Step-by-step: how to disassemble the IR-controller Xiaomi

Xiaomi Infrared Remotes (for example, for Mi models) TV 4A 32" or Mi" TV 4S 55" are standard design: two halves of the body, fastened by latches or screws. Let's consider the process in the example of a typical remote with a battery. CR2032.

Remove the battery from the bay.|Take a picture of the remote from all sides.|Prepare the workplace (lighting, tools)|Check for spare latches (if the remote has already been disassembled before)-->

Step 1: Removing the battery and finding hidden screws

Open the battery compartment (usually on the back). In some models, there's a screw hidden under the battery, you have to unscrew it. If there's no screw, the case only holds on the latches.

Pay attention to the battery marking: Xiaomi is most often used in remotes CR2032 (3B, 220 mAh), but in some models (e.g. Mi TV Stick can stand CR2026. Don’t confuse it when buying a replacement!

Step 2: Separation of the hull

Insert a plastic blade into the gap between the halves of the body (better start from where there are no buttons). Carefully drive the blade around the perimeter, alternately snapping the locks. Don't put too much effort — if the case does not respond, you may have missed the screw.

Xiaomi Mi Remote (voice-controlled) consoles often have additional latches near the microphone. Be especially careful in this area!

Step 3: Extracting fees and diagnosing

When you remove the top cover, you'll see a PCB with buttons and an IR transmitter. Carefully remove the board by detaching the plume (if any).

• 🔍 Contact buttons - whether there is oxidation or contamination
• 📡 IR lens – is it whole and dusty?
• 🔋 Battery contacts - are they bent?

If the buttons stick, the problem is most often the rubber membrane, which can be washed in soapy water or replaced. To clean the contacts, use a cotton swab soaked in alcohol.

Features of disassembling the Bluetooth-coreboard Xiaomi

Bluetooth remotes (for example, for Mi) TV Q1/Q2 or Redmi Smart TV X) are more complex than IR models:

• 📶 Built-in Bluetooth module (chip) CC2540 or NRF24L01)
• 🔋 Battery (instead of a replacement battery)
• 🎤 Microphone and speaker (in voice-controlled models)

The main difference from the IR panel is the presence of soldered joints and plumes, and you can not do without a soldering iron and experience with electronics.

Step 1: Shutting off the battery

Unlike IR remotes, there is no removable battery. 3.7V, 100-200 mAh) soldered to the board. First of all, sell off one of the contacts to avoid short circuit!

⚠️ Note: Xiaomi remote batteries may be inflated, a sign of wear. If the battery case is deformed, don't try to charge or solder it.

Step 2: Disconnecting the plumes

Bluetooth remotes often have:

• 🔊 Dynamic plume (for audible signals)
• 🎤 Microphone plume (in models with voice control)
• 📡 Bluetooth antenna (thin wire or track on board)

The plumes are attached by type connectors. FPC. To disconnect them, gently tuck the black latch with a flat screwdriver and pull the tape. Don't pull the wires!

Step 3: Diagnostics of Bluetooth module

If the remote is not synchronized with the TV, the problem may be:

• 📡 Antennae (check the integrity of the tracks on the board)
• 🔋 Battery (measure voltage - should be) ~3.7B)
• 📱 Firmware module (in rare cases, you need to flash through the USB-UART adapter)

To check the Bluetooth module, you can use the application nRF Connect (Android/iOS). If the remote is not detected, the chip or antenna is likely to be faulty.

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Xiaomi Bluetooth remotes can't be replaced by IR remotes, they use different communication protocols, and if the Bluetooth module is broken, the only option is to repair or buy the original remote.

Typical Problems and How to Avoid Them

Disassembling the remote is a simple process, but there are a number of errors that can lead to failure.

Another common mistake is the back assembly confusion, to avoid this:

• 📸 Take photos of each stage of the disassembly
• 📌 Sign the plumes (for example, "microphone", "dynamics")
• 🔧 Wrap the screws in the same sequence in which you twisted them.

If the remote does not work after assembly:

1. Check the polarity of the battery/battery
2. Make sure all the plumes are tightly connected.
3. Reset the remote (clutch). OK + Menu for 10 seconds)

Cleaning and repair of contacts: step-by-step process

If the buttons on Xiaomi remote don’t work well or work “once in”, the problem is most often oxidized contacts or worn rubber membrane.

1.Bleaning contacts on board

Take a cotton swab, moisten it in isopropyl alcohol (90%+) Or cologne, and clean it carefully:

• 🔘 Contact areas under the buttons (they look like round or oval tracks)
• 🔋 Battery/battery contact
• 📡 Contacts of an IR transmitter or Bluetooth module

For severe contaminants, you can use an eraser, which removes oxides well. After cleaning, let the board dry. 10-15 minute.

Reconstruction of the rubber membrane

If the buttons fail or don't lock, the problem is the rubber bumps on the membrane.

• 🧼 Wash in warm soapy water (without aggressive detergents!)
• 🖌️ Restore height with silicone sealant (applied point-by-point)
• 🔄 Replace the membrane with a new one (you can take it from the old remote or order it on AliExpress)

⚠️ Warning: Don't use superglue to repair the membrane, it hardens and makes the buttons stiff. Only silicone sealant or special rubber glue!

3.Serving damaged tracks

If you find damaged or detached tracks during the inspection of the fee, they can be restored using:

• 🔥 soldering iron and thin wire ("barriers")
• 🎨 Conductive glue (e.g. Contactol)
• 📏 Conductive tapes

Use flux soldering for soldering (for example, Sn60Pb40) and soldering iron of no more power 30 The temperature stings — 250-300°C. After soldering, clean the board with alcohol to remove flux residues.

Replacement of battery or battery: nuances

In the IR-cooled Xiaomi uses a replacement battery type CR2032 or CR2026, Bluetooth models have a built-in lithium polymer battery (usually) 3.7V, 100-200 mAh. Let's look at both options.

Replacement of the battery in the IR-pool

The process is simple:

1. Open the battery compartment (usually on the back).
2. Remove the old battery by remembering the polarity (the board has markings) + and –).
3. Insert a new battery (e.g. Duracell) CR2032 or GP CR2026).
4. Close the lid of the bay.

If the remote does not work after the replacement:

• 🔄 Turn the battery over (you may have confused polarity)
• 🧹 Clean the contacts in the bay with alcohol
• 🔧 Check if the contacts are not bent on the board

Replace the battery in a Bluetooth-pool

The process is more complicated here:

1. Remove the old battery while observing polarity.
2. Use a new battery (you can use any battery) 3.7V suitable size, for example 042026 or 052026).
3. Check the voltage with a multimeter - it should be ~3.7B.
4. Collect the remote and charge it (usually charging goes through the USB-TV-port).

For soldering the battery, use a thin solder and do not overheat the contacts - lithium batteries are sensitive to high temperatures.

Assembly of the remote after repair: inspection and testing

After repair or cleaning, put the remote in reverse order.

• 🔧 Make sure all screws are twisted (but don't tug over!).
• 📶 Check the connection of the plumes (they should sit tightly, without distortions).
• 🔋 Insert the battery/battery while observing polarity.
• 🧲 Close the case, making sure that all latches are in place.

Now test the remote:

1. Point it at the TV and press Power.
2. Check the operation of all buttons (especially frequently used: Volume, OK, Back).
3. For Bluetooth remote, repeat sync with the TV (click Home) + Back to 5 seconds).

⚠️ Note: If the buttons are reversed after assembly (e.g. Volume)+ It's turning down the volume, you've got the rubber membrane mixed up.

If the remote is not working:

• 🔍 Check the integrity of the transparent IR transmitter window (it should be clean).
• 📡 For Bluetooth models, make sure the module doesn’t fall off the board.
• 🔧 Reset the remote (clutch). OK + Menu for 10 seconds).

FAQ: Frequent questions about the dismantling of Xiaomi remotes