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In this video we're going to learn about the NFC chips

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NFC stands for Near Field Communication,

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sometimes it's called Near Field Wireless communication

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It belongs to a short distance high frequency wireless transmission communication technology

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It means that non-contact wireless data transmission can be carried out

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when the distance between electronic devices is less than 20 centimeters

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NFC technology is widely used in our daily life

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For example, we swipe our bus card

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When SF Express mail, you need to register your ID card,

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you just need to hold your ID card near this device

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The ID information will be recognized inside the device

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These are all using NFC technology

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In Apple's models, NFC chips have been used since the iPhone 6

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There is only one NFC chip in the mainboards of the iPhones from 6 to 11

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But when it comes to the iPhone 12, there are two NFC chips

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In actual maintenance, when the NFC chip is damaged,

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it leads to two common problems

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The first is that it cannot be activated after brushing

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The second one is, when we dropped the phone,

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the last one get stuck when we try to enter the password

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The CPU does not recognize the NFC,

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or the NFC chip is damaged

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The NFC function is damaged and the possibility of repair is not very high

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But both problems can be fixed

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The NFC chip is bound to the CPU and needs to be replaced with the same model

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After replacement, the two common problems can be fixed

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But the NFC function cannot be fixed,

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because the NFC chip is bound to the CPU,

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and there is only one corresponding NFC chip for per machine

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When we repair the iPhone in the future,

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we will only repair the failure to activate

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and failure of stucking on the enter password surface

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Early NFC chips were thick, with a black surface

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Later chips were thinner and made of glass crystals

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Let's get to know the NFC chip in the real object

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This mainboard is an iPhone 6 mainboard,

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and its NFC chip is in this position

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Model number we can see, 65V10

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This mainboard is an iPhone 7 mainboard,

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and its NFC chip is in this position

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The chip's model number is 67V04

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This mainboard is an iPhone 8 mainboard,

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its NFC chip is in this position, the model number is 80VES

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This board is a XR board,

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and its NFC chip is in this position

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The model of the NFC chip is not easy to identify

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This mainboard is the lower mainboard of the iPhone 11,

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and its NFC chip is in this position

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The chip is black, and you can't see the model number on it

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So that's all for this lesson