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iPhone camera circuit repairing
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This video mainly explains how to find the wide-angle camera signal
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and measurement points of iPhone 11 Pro and ProMax models
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Search method step 1, find the wide-angle camera connector in the component map
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Step 2, determine the position number in the bitmap
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Step 3, search for the position number in the circuit diagram,
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and find the corresponding signals
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Step 4, according to the signals, jump to the bitmap to view the connected components
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The voltage and diode value can be measured at the position of the yellow point in the bitmap
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When checking the maps, first open the iPhone 11Pro, ProMax component map, circuit diagram, bitmap
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Find the camera connector in the component map
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And determine the position number of the connector in the bitmap
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Then search for the position number in the circuit diagram
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After finding the camera connector, find the corresponding signals
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First find the 1.8V power supply from the main power supply to the wide-angle camera
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The first pin of the 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 FL7295
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and then connects to the main power supply
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This power supply will be the same power supply as the 1.8V of the CPU and hard disk
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Next, find the I2C bus from the camera power supply to the wide-angle camera
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Pins 10 and 11 of the connector are the I2C buses
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Pin 10, jump to the bitmap according to the signal name,
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the bus is directly connected to the camera power supply U3700
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Pin 11, jump to the bitmap according to the name,
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the I2C bus is also directly connected to the camera power supply
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Next, find the 24M clock signal from the camera power supply to the wide-angle camera
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Pin 13 of the connector is the 24M clock signal
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Jump to the bitmap according to the name,
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the clock signal is connected to the resistor R7205,
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And connected to the camera power supply after passing through the resistor
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Next, find the 3.3V power supply from the camera power supply to the wide-angle camera
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Pin 12 of the connector is the 3.3V power supply
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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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This power supply will also provide working voltage for other camera power conversion tubes
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Next, let鈥檚 look for the AVDD2 power supply sent by the camera power supply, the 1.2V, 2.925V,
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and PVDD power supplies sent by the conversion tube when the camera circuit is started
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Pins 25, 29, 30, and 32 of the connector are the 1.2V power supplies
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Jump to the bitmap according to the name,
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the 1.2V power supply is directly connected to the camera power conversion chip U3910
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Pin 2 of the connector is the AVDD2 power supply
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Jump to the bitmap according to the name, AVDD2 power supply is directly provided by the camera power supply
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Pin 4 of the connector is the 2.925V power supply
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Jump to the bitmap according to the name,
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the power supply is directly connected to the camera power supply conversion tube U4110
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The 8th pin of the connector is the PVDD power supply
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Jump to the bitmap according to the name,
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PVDD power supply is connected to the fuse inductor FL7201
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and connected to the camera power conversion tube U3940
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The power supply will also be sent to the main power supply,
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so that the main power supply can monitor whether the power supply is normal
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Next, look for the open signal
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Pin 3 of the connector is the open signal
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Jump to the bitmap according to the name,
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the open signal is connected to the camera power supply without fuse in the middle
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Let's find the LPDP data bus from the CPU to the wide-angle camera
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When the LPDP data bus transmits data,
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it will pass through the coupling capacitors
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Pins 16, 18, 17, 19, 22, 24 of the connector are the LPDP buses
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Pin 16, jump to the bitmap according to the name,
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the pin is connected to the coupling capacitor C7250
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And connected to the CPU after passing through the capacitor
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Pin 18, jump to the bitmap according to the name,
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it is connected to the coupling capacitor C7251,
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and then connected to the CPU after passing through the capacitor
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Pin 17, jump to the bitmap according to the name,
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it is connected to the coupling capacitor C7230,
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and then connected to the CPU after passing through the capacitor
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Pin 19, jump to the bitmap according to the name,
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it is connected to the coupling capacitor C7231,
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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 C7240,
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and then connected to the CPU after passing through the capacitor
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Pin 24, jump to the bitmap according to the name,
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it is connected to the coupling capacitor C7241,
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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 detection signal from the CPU to the wide-angle camera
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Pin 23 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 detection signal is connected to the coupling capacitor C7260,
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and connected to the CPU after passing through the capacitor
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If one of the coupling capacitors is damaged or missing, the camera cannot be turned on
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That's all for this video
