Issue Description
A customer brought in an iPhone X rear camera with a non-functional. The front camera operates normally, but the rear camera fails to function. After initial testing, it was discovered that the rear camera works at 2x zoom but does not respond in 1x normal zoom mode. This suggests a potential iPhone X rear camera defect or a motherboard issue.
Table of Contents
Step 1: Preliminary Testing
- Prepare Testing Components
- Use a functioning screen assembly and a known good rear camera module for testing.
- Connect the motherboard and assemble the iPhone for testing.
- Test the Camera Functions
- The front camera operates correctly.
- The rear camera works at 2x zoom but does not function at 1x normal zoom.
- Since the issue persists with a known working rear camera, the motherboard is likely the culprit.
Step 2: Troubleshooting the iPhone X rear camera Power Supply
- Check for 1.1V Power Supply
- In previous repairs, we found that a common cause of rear camera failure is the lack of 1.1V power to the module.
- To verify this, we need to measure the voltage at the iPhone X rear camera connector.
- Remove the Motherboard for Measurement
- Inspect the Power Supply Circuit
- Remove the full pads on the rear camera collector.
- Identify and measure the inductor connected to the power supply IC circuit.
- Results: The inductor to the power supply IC is normal, but the other end is open, indicating a faulty circuit.
Step 3: Repairing the Power Supply Circuit
- Replace the Faulty Inductor
- Since the existing inductor is not conducting power, a new inductor is required.
- Steps to replace:
- Use a knife blade to scrape off the black sticker around the faulty inductor.
- Clean the area thoroughly before soldering.
- Solder the New Inductor
- Apply solder flux to the area.
- Position and solder the new inductor securely.
- Use a hot air gun to ensure a proper connection.
Step 4: Reassembling and Testing
- Reassemble the iPhone
- Secure the motherboard back in place.
- Connect the rear camera and screen assembly.
- Reattach the full pads to restore the connection.
- Final Testing
- Power on the iPhone and test the rear camera.
- The camera now works properly in both 1x normal zoom and 2x zoom modes.
- The repair is successfully completed.
Conclusion
The iPhone X rear camera issue was caused by a missing 1.1V power supply due to a faulty inductor on the motherboard. By diagnosing, replacing the inductor, and re-soldering the connections, we successfully restored full rear camera functionality. This repair demonstrates the importance of micro-soldering techniques and circuit troubleshooting in resolving hardware failures.
For any similar camera-related issues, always ensure proper power supply checks and component-level repairs to achieve a long-lasting fix.
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