Скачать или смотреть Infinix Smart 9 Charging Problem Solution | Charging Ways | Sub Board Repair Guide

In this video, you will learn the complete charging problem solution for Infinix Smart 9. If your phone is not charging, charging slow, showing charging paused, heating, or no USB detection, this guide explains all charging ways, sub board jumpers, track repairs, and component testing. Follow this step-by-step repair solution to fix Infinix Smart 9 charging issues professionally.

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📌 30 Step-by-Step Repair Guide

Turn off Infinix Smart 9.

Remove SIM tray.

Open back cover.

Disconnect battery.

Remove sub board screws.

Inspect charging port.

Clean charging port with IPA.

Test port pins for movement.

Check USB connector lines.

Inspect charging ways tracks.

Test VBUS line continuity.

Test GND continuity.

Test D+ and D– lines.

Check charging filter near port.

Replace filter if short.

Inspect charging IC area.

Test PMIC charging input.

Apply jumper if track broken.

Replace charging port if damaged.

Re-solder loose components.

Clean board again.

Connect battery.

Assemble sub board.

Power on device.

Test charging with original cable.

Check USB detection.

Check battery percentage increasing.

Check for heating.

Verify full charging.

Close phone completely.

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