A03s Original Sub Board Charging Strip Diagram USB Port, MIC Antenna & Pinout Full Hardware Solution
Автор: Mobile hardware solutions
Загружено: 2026-01-10
Просмотров: 11
Описание:
In this video, you will learn a complete professional hardware explanation of the Samsung Galaxy A03s original sub board / charging strip diagram. This guide includes USB charging port lines, MIC signal, antenna contacts, VBUS, GND, and board-to-board connections. Step by step explanation helps technicians trace faults, test jumper lines, check sub board components, and perform replacements. Ideal for mobile repair technicians in US, UK, Europe, and worldwide. No voice and no thumbnail required.
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🛠 30 Step-by-Step Board Understanding / Repair Guide
Power off Samsung Galaxy A03s
Remove SIM tray
Open back cover carefully
Disconnect battery connector
Remove loudspeaker module
Locate charging sub board
Identify USB charging connector
Locate MIC signal line
Locate antenna contact points
Check VBUS supply line
Check GND continuity
Locate D+ data line
Locate D- data line
Inspect connector pins
Inspect sub board flex cable
Measure VBUS voltage
Check D+ and D- continuity
Test MIC signal line
Inspect antenna pad
Check for corrosion or water damage
Inspect charging IC track
Re-solder loose pins if required
Replace sub board if damaged
Reconnect flex cable to main board
Reconnect battery
Insert charger to test detection
Test MIC function
Test antenna signal
Verify VBUS and GND stable
Reassemble phone completely
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#SamsungA03s #SubBoardDiagram #ChargingStrip #USBBoard #MobileRepair #HardwareSolution #BoardWays #USBCharging #MICLine #AntennaRepair
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