"Phone charging repair Guide" Do you want to learn phone charging repair, do you want to learn android charging repair including diagnostic and component replacement tactics. Are you searching for phone charging repair guide, phone charging port repair, smartphone charging port repair, android phone charging repair or how to fix an android phone charging problem. If yes, Infoguide Ng has brought a complete step by step guide of phone charging repair. This article demonstrates the systematic process of diagnosing and repairing an Android smartphone that fails to power on or charge. Initial testing with a multimeter and current meter reveals that the device is drawing insufficient power due to a faulty charging circuit, which caused the battery to drain to a critically low voltage. To resolve the issue, the technician should manually boosts the battery's charge using an external power supply and subsequently replaces the charging connector on the motherboard. After installing the new component, the phone will displays a significantly improved amperage draw, confirming that the energy flow has been restored to normal levels. This article serves as a practical guide for using specialized hardware tools to identify hardware failures that are not visible to the naked eye.
Diagnosing and Repairing a Non-Responsive Android Smartphone.
When a smartphone is "blacked out"—meaning it neither powers on nor appears to charge—the issue often lies within the charging system or a deeply drained battery. In a professional diagnostic setting, the first step involves using a current meter to observe the device's behavior; a low and fluctuating current reading typically indicates a fault in the charging system, a faulty battery, or a drained battery.
Initial Battery Assessment and Boosting.
A critical part of the diagnosis is measuring the battery voltage using a multimeter. In this specific case, the battery measured only 3.3 volts, which is insufficient to power the device; a phone generally requires between 3.6 and 3.7 volts just to display a low-battery indicator. When a battery is this low, the internal charging system may not bring in enough power to "wake it up".
To address this, technicians use an external power supply to "boost" the battery. By connecting the battery directly to the power supply, the current is manually increased until the voltage reaches a stable level, such as 3.6 volts, which is enough to allow the phone to display a charging sign and attempt to power on.
Identifying the Charging Circuit Failure.
Even after the battery is boosted and the phone powers on, the charging circuit must be monitored for efficiency. For a large battery (approximately 4000 mAh), the current draw should be significant to ensure a reasonable charging time. In the observed device, the current draw was fluctuating between 0.29 and 0.32 amps which is far too low; at that rate, a full charge could take an entire day. While the charging connector may look clean externally, it can have broken internal parts that restrict power flow. Therefore, if the motherboard output is stable but the current draw remains low, the connector is a primary candidate for replacement.
The Repair Process: Replacing the Charging Connector.
Replacing a charging system component requires specific tools and a steady hand. The process involves:
- Removal: Applying flux and using a heat gun (set to approximately 340°C) to desolder the old connector from the motherboard.
- Alignment: Positioning the new connector carefully; when heated properly, the component will often align itself into the correct position on the pads.
- Cleaning: Ensuring the workstation and the motherboard are cleaned after the new part is fitted.
Final Testing and Verification.
Once the new connector is installed, the device should show an immediate improvement in current consumption. In this case, the reading jumped to approximately 0.41 to 0.43 amps on the multimeter, which signifies an actual draw of about 1.2 amps at the battery. This increased amperage allowed the phone to successfully charge from 1% to 2% in a short period, confirming that the charging system was fully restored.
Analogy: Think of the smartphone’s charging system like a water pipe leading into a tank (the battery). If the pipe is clogged (a faulty connector), only a tiny trickle of water gets through. Even if you manually splash some water into the tank to get it started (boosting the battery), the clog prevents the tank from ever filling up at a normal speed. Replacing the connector is like swapping out that clogged pipe for a new one, allowing the water to flow at full pressure again.
I believe this step by step guide will help to learn android phone charging repair.
Here's a video that explain Phone Charging Repair (Android Charging Repair).