Скачать или смотреть Xiaomi POCO X3 Charging Strip Sub Board Diagram | USB Type C Charging Problem Solution Step by Step

In this video, you will learn complete professional explanation of Xiaomi POCO X3 charging strip and sub board diagram. This step by step repair guide explains USB Type-C port pinout, VBUS line, CC lines, charging flex connector path, microphone connection on sub board, antenna contacts, and common charging problems. This guide helps to fix not charging, slow charging, no charging sign, and charging disconnect issues. Perfect for mobile repair technicians in US, UK, Europe, and worldwide. No voice and no thumbnail required.

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🛠️ 30 Step-by-Step Repair / Diagram Explanation

Power off Xiaomi POCO X3

Remove SIM tray

Open back cover carefully

Disconnect battery connector

Remove charging sub board

Identify USB Type-C port

Locate VBUS pin on port

Locate GND pins

Identify CC1 and CC2 pins

Identify D+ and D− lines

Inspect ESD protection near port

Check VBUS filter / coil

Trace VBUS line to flex connector

Trace GND path to ground plane

Identify microphone on sub board

Check mic signal line

Inspect antenna spring contacts

Check sub board flex connector pins

Measure VBUS voltage (5V)

Test CC line voltage

Check continuity from sub board to main board

Identify broken charging line

Apply VBUS jumper if required

Repair CC line jumper if needed

Clean connector with IPA

Reinstall sub board

Reconnect battery connector

Connect charger cable

Confirm charging symbol

Reassemble phone completely

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