Replacement of charging board on Xiaomi Redmi 5: a full guide with photos and nuances

If your Xiaomi Redmi 5 has stopped charging, it shows a faulty charger or connector error. USB-C The problem is very likely to be the charger board (aka the power module or the dock connector), which is not only responsible for the physical connection of the cable, but also for controlling current, voltage distribution and protection against short circuits.

Many users mistakenly think that it is enough to replace the connector itself, but in 80% of cases, the charging control chip fails (SY6288A In this article, we'll look at how to diagnose a malfunction, pick up a quality part, and replace the charging module yourself without risking damage to the motherboard. It’s harder than replacing a battery, but it’s quite real for beginners with the right approach.

Signs of a charging board malfunction

Before you disassemble the phone, make sure that the problem is in the charging module.

• 🔌 The smartphone does not respond to the charger connection (no indication, sound or vibration).
• ⚡ The charge is intermittent: it turns on, then turns off (often accompanied by a crack in the connector).
• 📉 The battery charges extremely slowly (for example, 1% in 30 minutes) with a proper power supply.
• 🔥 The phone is warming up in the connector area. USB-C or is disconnected when the cable is connected.
• 🚨 A Moisture detected notification appears, even though the phone was not in the water.

If any of these signs show up, there's a 90 percent chance that the charging module is at fault, but check before you repair them.

1. The cable and power supply are faulty (try charging another phone).
2. Clean connector USB-C (Clean carefully with a toothpick soaked in alcohol).
3. Battery performance (if it is swelling, replace it first).

⚠️ Warning: If the phone falls into water or is subjected to severe vibration (for example, after a fall), the malfunction may be hidden in the contacts of the motherboard.

What Charging Charges to Choose for Redmi 5

There are three types of spare parts on the market for the Redmi 5 (model) MDE6):

We recommend choosing analogues from proven manufacturers (for example, Huaqin, Shenzhen Yichuang or Longcheer). Original boards are rare and often sold under the guise of "contract" (used).

• 📦 Set: the set should be fasteners and heat pads.
• 🔍 Marking: the board must have a Xiaomi logo and number MDE6-01 (for Redmi 5).
• 📏 Connector matching: USB-C should sit tight, without backlash.

Redmi 5 charging charger not compatible with Redmi models 5A Or Redmi 5 Plus -- they have different connectors and power circuitry. → The phone. → Model).

💡

Before buying a spare part, check the reviews of the seller on the site (for example, on AliExpress or Yula), often under the guise of “original” sell low-quality copies with aluminum contacts instead of copper ones.

Tools for replacing charging boards

You will need to work:

Screwdriver. T3 (magnetic)|Plastic mediators (2 pcs.)|Tweezers (preferably curved)|Soldering station (power 30-60 W)|Solder and flux (e.g, RMA-223)|Thermoclei or bilateral scotch|Multimeter (to check contacts)-->

If you don't have a soldering station, you can use a hot-air thermo-station (dryer) with a hot-point nozzle, but it increases the risk of overheating the motherboard, and the alternative is to use a soldering iron with a thin stinger (0.5-1 mm) and a low temperature (300-350).°C).

Also prepare the workplace:

• 🪑 A table with good lighting (better to use a table lamp).
• 🧲 Magnetic mat or screw container (so as not to lose small details).
• 📱 Antistatic bracelet (optional but recommended for chip protection).

⚠️ Warning: Do not use metal blades or knives to disassemble, they can damage the plumes or leave burrs on the case. Plastic mediators are sold in phone repair kits (cost 100-200). ₽).

Step-by-step instructions for replacing the charging board

The Redmi 5 takes care to disassemble, with many fragile plumes inside.

1. Disconnection and disassembly of the phone

Turn off your smartphone and remove the tray for SIM-Then the maps:

1. Heat the back cover with a hair dryer (60–80°C) for 2-3 minutes to soften the glue.
2. Insert a plastic mediator into the gap between the lid and the case (start at the bottom corner next to the connector). USB-C).
3. Carefully move the mediator around the perimeter, separating the lid. Do not apply force - if it does not respond, heat it again with a hairdryer.

When you remove the lid, disconnect the battery with a plastic blade. Don't pull the wires. If the battery is swelling, don't try to remove it, it's dangerous.

2. Dismantling the old charging board

The charger board is attached to the motherboard with 4-6 screws (depending on the revision) and soldered to several contacts.

1. Unscrew all screws (save them in a separate container).
2. Disconnect antenna plumes and speaker (they may interfere).
3. Apply flux to the board contacts and heat them gently with a hairdryer (temperature 300)°C) for 10-15 seconds.
4. When the solder melts, tweez the board and take it off.

Important: Don't overheat the motherboard for more than 20 seconds - it can damage the chips. If the board doesn't move, add flux and repeat the heating.

3. Installation of a new board

Before installing the new fee:

• Clean the contacts on the motherboard with alcohol and a brush.
• Apply a thin layer of flux to the landing site.
• Level the new charge on the holes under the screws.

Then:

1. Heat contacts with a hair dryer (300)°C) and press the charge carefully with tweezers.
2. Let it cool for 1-2 minutes and check if the contacts have shifted.
3. Turn the screws (do not pull!).
4. Connect antenna plumes and speaker.

4. Assembly and testing

After installation:

1. Connect the battery and check the multimeter voltage on the board contacts (should be ~3.7–4.2V).
2. Stick the back cover to a double-sided scotch or heat-glue.
3. Turn on your phone and check the charger.

If the phone is not powered on or charging, check:

• 🔌 Correctness of connection of plumes.
• 🔥 Quality of soldering (are there cold contacts).
• 📱 Battery Failure (Try Charging From Another Source).

💡

The most common mistake when replacing a charging board is overheating the motherboard. If the phone doesn't turn on after repair, the power chips are likely to have failed (PMIC).

Common Mistakes and How to Avoid Them

Even the most experienced craftsmen make mistakes sometimes, and here are the most common ones:

• 🔥 Overheating of the board: Long-term exposure to high temperature (over 350)°C) destroys tracks and chips. Solution: Use thermocouples and control temperature.
• 🔌 Cold soldering: Contacts seem soldered, but the solder hasn't really melted completely.Solution: Add flux and warm up longer.
• 📏 Disparity of the board model: Installation of the module from Redmi 5A Or another audit will cause charging errors. Solution: Check the labeling before you buy.
• 🔋 Battery damage: When the battery plume is disconnected, you can break the contacts. Solution: Use a plastic blade and don't pull the wires.

If after the change of the fee, the phone charges, but discharges quickly - the problem may be in the power controller (PMIC) In this case, you'll need a diagnostic on the motherboard.

Cost of repair in the service vs. self-replacement

If you're not sure about your abilities, you should contact the service.

Self-repair is beneficial if:

• 💰 You have a limited budget.
• 🔧 I have experience with a soldering iron.
• ⏳ You can’t wait (for example, you need a phone right away).

Please contact the service if:

• 📱 Phone warranty (self-repair cancels it).
• 🔥 You are not sure about your skills (risk of damaging the motherboard).
• 🛠️ Diagnosing other malfunctions (e.g., power chips) is required).

Frequently asked questions