Скачать или смотреть Infinix Not 7 X690 Charging Strip Problem Solution | Sub Board Charging Ways & Jumper Repair

This video shows the complete hardware solution for Infinix Not 7 X690 charging strip problem, including USB port issues, sub-board inspection, charging IC/PMIC testing, voltage checks, track repair, and jumper ways. Learn step-by-step repair for charging faults caused by damaged charging strips or sub-board circuits. Perfect for mobile repair technicians.

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✅ 30 Step-by-Step Repair Guide

Power off the device and remove back cover.

Disconnect battery carefully.

Remove screws and open mid-frame.

Inspect USB charging strip for physical damage.

Test USB connector pins for continuity.

Clean USB port with IPA brush.

Remove sub-board for charging inspection.

Inspect PMIC and charging IC voltages.

Check VBUS and battery lines on sub-board.

Test coil and diode on charging path.

Jumper broken track if detected.

Replace faulty capacitor or resistor.

Test USB voltage output to battery connector.

Reflow solder joints of USB connector.

Inspect sub-board traces for burnt spots.

Replace damaged sub-board if needed.

Connect battery and test charging.

Check fast charging output.

Verify multimeter readings for proper voltage.

Inspect PMIC heating issues.

Test phone boot while charging.

Ensure voltage stable across all rails.

Check USB port stability under load.

Test full battery percentage increment.

Reassemble sub-board and mid-frame.

Confirm proper voltage on all charging lines.

Test multiple chargers for consistency.

Inspect and clean all solder joints.

Close back cover securely.

Final testing: normal charging restored.

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