iPhone 12 Pro Max flash won't open for repair

iPhone 12 Pro Max flash won’t open for repair

Machine model: iPhone 12 Pro MAX
Customer description: The flash can’t be turned on and can’t be used normally.
Test results: The mobile phone can be turned on normally without any prompt, all functions of the mobile phone are normal, the LED lights can be turned on, but it doesn’t work, and the wide-angle Camera can’t work.
Fault analysis: Because all functions of the are normal, only LED is faulty, so we tend to maintain LED circuits and chips.
First, we open Xinzhizao Soft software and find the drawing. Find the chips and circuits related to LED flash on the drawing.

iPhone 12 Pro Max flash won’t open for repair　Figure 1.

Then open Boardview and find the corresponding chip.

iPhone 12 Pro Max flash won’t open for repair　Figure 2.

The name of this chip is U6500. Open schematic and look for schematic.

iPhone 12 Pro Max flash won’t open for repair　Figure 3.

The working conditions of the chip were measured with reference to Boardview and schematic, and it was found that the chip had been damaged. After replacing the chip, the fault was repaired.