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In this lesson we are going to learn about the touch chips

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The main function of the touch chip is to send the touch information received by the touch screen

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to the CPU so that the CPU can execute some touch commands

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In Apple models, the touch chip in the iPhone 6 and iPhone 6p is in the mainboard,

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which is called Black Touch or White Touch

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The color of the two chips is different

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On the iPhone 6s and above, the touch chip is installed in the screen cable

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In the iPhone 12 series, there's another chip in the mainboard,

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which is actually a touch signal conversion IC

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The CPU sends commands to the chip,

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which then sends these signals to the touch screen

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The advantage of this is that the CPU is less likely to get corrupted if the touch is faulty

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If the touch chip is damaged,

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the touch screen can not be used or broken

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When we replace the touch chip, we need the same model to replace

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Next, we go to the physical mainboard to know the touch chip

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This mainboard is an iPhone 6 mainboard,

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and its touch chip is in the mainboard

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The black one on the upper surface is called the black touch,

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and the white one on the lower surface is called the white touch

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This mainboard is a 12 pro max mainboard,

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and this chip is the touch conversion chip of it

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This chip is to transfer the touch screen signal to the CPU,

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it acts as a bridge

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This is the screen of the iPhone 6S,

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and the touch chip is in the touch cable

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There will be two chips inside, black touch and white touch

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This screen is the XR screen,

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and its touch chip is also in the screen

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This long chip is the XR's touch chip, which is also integrated with two chips

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This screen is the iphone 7p screen,

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and its touch chip is also in the screen cable

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This long chip is the iphone 7p's touch chip,

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which contains both black and white touch inside

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So that's it for this lesson