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iPhone camera circuit repairing

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This video mainly explains the working principle of the front camera circuit of iPhone 8 to iPhone X models

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Camera working principle step 1, after starting up,

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the main power supply will first output 1.8V power supply to provide the working voltage for the front camera

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Step 2, after the CPU working condition is normal,

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it will read and detect the front camera through the I2C bus

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Step 3, after the CPU detects the camera,

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it will send a clock signal to the front camera

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Step 4, when starting to the camera circuit,

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the camera power supply will output 2.85V and 1.1V power supply to provide working voltage for the front camera

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Step 5, when booting to the camera circuit,

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the CPU sends an open signal to the front camera

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Step 6, the front camera has power supply, clock and open signals,

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and then it can work normally

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When using the camera function, click the camera icon on the iPhone,

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The camera will send the collected image information to the CPU through the LPDP bus

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After the CPU receives the data,

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it will display the information on the screen

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When we click the camera button,

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the CPU will intercept the current LPDP bus data

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and transfer it to the hard disk to complete the camera function

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When we click the recording function,

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the CPU will continuously transfer the LPDP bus data to the hard disk

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When we press stop, the CPU no longer collects LPDP bus data,

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and the video recording is completed

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If there is a working condition in the block diagram that is not normal,

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it will cause the front camera to fail to open

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That's all for this video