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iPhone camera circuit repairing

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This video mainly explains how to find the iPhone 8P camera circuit signal and measurement points

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Search method step 1, find the position number of the camera connector in the component map

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Step 2, search for the position number in the circuit diagram

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Step 3, find the corresponding signals in the schematic diagram

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Step 4, jump to the bitmap according to the pin to view the connected components

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We can measure the voltage and diode value at the yellow points in the bitmap

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When checking the maps, we first open the iPhone 8 p component map, circuit diagram, and bitmap

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First find the position number of the wide-angle camera connector in the component map

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Then search for the connector in the circuit diagram

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After finding the connector, find the corresponding signals according to the block diagram

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First find the 1.8V power supply from the main power supply to the camera

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Pin 16 of the wide-angle camera connector is the 1.8V power supply

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Jump to the bitmap according to the name,

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the 1.8V power supply passes through the fuse inductor FL3995 and then connects to the main power supply

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And it is the same way as the 1.8V power supply of CPU and hard disk

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Let's find the I2C detection bus of the wide-angle camera

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Pins 12 and 14 of the connector are the I2C buses

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Jump to the bitmap according to the name,

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the bus clock is connected to the CPU after passing through the fuse resistor R3900

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Pin 14, bus data, jump to bitmap according to the name

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The bus data is connected to the CPU after passing through the fuse resistor R3901R3901

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Let's find other power supplies for the wide-angle camera

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The first pin of the connector is the 2.85V power supply of the wide-angle camera

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Jump to the bitmap according to the name,

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the 2.85V power supply is directly connected to the camera power supply

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The third pin of the connector is the ADC power supply of the wide-angle camera

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Jump to the bitmap according to the name,

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the ADC power supply is also directly connected to the camera power supply

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Pin 5 of the connector is the PVDD power supply of the wide-angle camera

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Jump to the bitmap according to the name,

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the PVDD power supply passes through the fuse inductor FL3901 and then connects to the camera power supply

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Pins 27, 28, and 30 of the connector are the 1.1V power supplies of the wide-angle camera

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Jump to the bitmap according to the name,

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the 1.1V power supply passes through the fuse inductor FL3009 and then connects to the camera power supply

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The 6th pin of the connector is the 3.3V power supply of the wide-angle camera

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Jump to the bitmap according to the name,

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the 3.3V power supply is directly connected to the camera power supply

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In this way, we have searched all the power supplies of the camera

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Let's find the clock signal from the CPU to the wide-angle camera

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The second pin of the connector is the clock signal of the wide-angle camera

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Jump to the bitmap according to the name,

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the clock signal is connected to the fuse resistor R3905

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and connected to the fuse resistor R1240

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And then connected to the CPU after passing through the resistor

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Let's find the open signal of the wide-angle camera

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Pin 20 of the connector is the open signal of the wide-angle camera

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Jump to the bitmap according to the name,

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the signal is connected to the CPU after passing through the fuse resistor R3907

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Let's find the LPDP data bus from the CPU to the camera

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When the LPDP bus is connected to the CPU, it will go through the coupling capacitor

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Pins 9, 11, 15, 17, 21, and 23 of the connector are LPDP buses

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Jump to the bitmap according to the name

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As we can see in the bitmap, the LPDP bus is first connected to the coupling capacitor,

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and then connected to the CPU after passing through the coupling capacitor

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Each LPDP bus will be connected to the CPU after passing through the coupling capacitor

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A damaged coupling capacitor will cause the camera to fail to open

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Let's find the LPDP bus detection signal AUX from the CPU to the camera

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Pin 22 of the connector is the LPDP bus detection signal

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Jump to the bitmap according to the name,

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the signal passes through the coupling capacitor,

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and then connects to the CPU

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In this way, we have searched all the signals of the wide-angle camera

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When repairing the camera faults, if the measured pin value is abnormal

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we troubleshoot according to the connected components by the bitmap

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That's all for this video