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iPhone camera circuit repairing

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This video mainly explains how to find the front camera signals and measurement points of iPhone 11

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Search method step 1, open the iPhone 11 component map,

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find the front camera connector and confirm the position number

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

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Step 3, after finding the camera connector,

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find the corresponding signals according to the schematic diagram

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Step 4, jump to the bitmap according to the name,

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and find 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, first open the iPhone 11 component map, circuit diagram, and bitmap

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Find the position number of the front camera connector in the component map

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Then search for the position number in the schematic 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 of the front camera

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Pin 5 of the connector is the 1.8V power supply of the front camera

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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 resistor R7601,

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and then connects to the camera power supply U3700

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Next, find the I2C bus from the camera power supply to the front camera

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There are two sets of I2C in the connector,

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among which I2C3 is the I2C bus of the front camera,

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which will be marked in the drawing

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So when looking for the front camera I2C, we need to look for I2C3

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Pins 6 and 8 of the connector are the I2C buses of the front camera

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Jump to the bitmap according to the name,

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the I2C bus is directly connected to the camera power supply

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Pin 8, jump to the bitmap according to the name,

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the signal is also directly connected to the camera power supply

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Next, look for the 12M clock signal from the camera power supply to the front camera

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Pin 28 of the connector is the 12M clock signal of the front camera

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Jump to the bitmap according to the name,

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the signal is connected to the fuse resistor R7610,

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and directly connected to the camera power supply after passing through the resistor

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Next, let's look for the 2.85V and 1.1V power supplies from the camera power supply to the front camera

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Pin 2 of the connector supplies power for the front camera with 2.85V

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Jump to the bitmap according to the name,

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the 2.85V power supply passes through the fuse resistor R7604

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and then connects to the camera power supply

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Pins 39, 40, and 42 of the connector provide 1.1V power supply for the front camera

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Jump to the bitmap according to the name,

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the 1.1V power supply is directly connected to the camera power supply

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Next, let鈥檚 look for the open signal

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Pin 4 of the connector is the open signal for the front camera

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Jump to the bitmap according to the name,

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and the open signal is directly connected to the camera power supply without fuse in the middle

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

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Pins 14, 16, 20, and 22 of the connector are the LPDP data buses

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

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the pin is connected to the coupling capacitor C7632

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And connected to the CPU after passing through the capacitor

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Pin 16, jump to the bitmap according to the name,

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it is connected to the coupling capacitor C7633,

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and then connected to the CPU after passing through the capacitor

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Pin 20, jump to the bitmap according to the name,

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it is connected to the coupling capacitor C7630,

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and then connected to the CPU after passing through the capacitor

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Pin 22, jump to the bitmap according to the name,

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it is connected to the coupling capacitor C7631,

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and then connected to the CPU after passing through the capacitor

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Next, look for the LPDP bus monitoring signal from the CPU to the front camera

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Pin 26 of the connector is the LPDP bus monitoring signal

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Jump to the bitmap according to the name,

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the pin is connected to the coupling capacitor C7634,

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and then connected to the CPU after passing through the capacitor

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The LPDP bus will be connected to the CPU through a coupling capacitor

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If a capacitor is damaged or removed, the front camera cannot be used

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That's all for this video