1

00:00:00,333 --> 00:00:02,200

iPhone camera circuit repairing

2

00:00:03,200 --> 00:00:10,633

This video mainly explains the working principle of iPhone 11, 11 Pro, Pro Max super-wide-angle camera circuit

3

00:00:12,000 --> 00:00:15,800

The working principle of these three models is basically the same,

4

00:00:16,166 --> 00:00:18,866

but there is a slight difference in the power supply

5

00:00:20,166 --> 00:00:23,533

Camera working principle step 1, after starting up,

6

00:00:24,166 --> 00:00:28,766

the camera power supply will output 1.8V power supply to provide the working voltage

7

00:00:28,766 --> 00:00:30,766

for the super wide-angle camera

8

00:00:31,600 --> 00:00:34,766

Step 2, in the process of starting the system,

9

00:00:34,866 --> 00:00:39,666

the camera power supply will read and detect the super-wide-angle camera through the I2C bus

10

00:00:41,100 --> 00:00:44,666

Step 3, after the camera power supply detects the camera,

11

00:00:44,933 --> 00:00:49,066

it will provide a 24M clock signal for the super-wide-angle camera

12

00:00:49,400 --> 00:00:52,100

Step 4, when starting up the camera circuit,

13

00:00:52,366 --> 00:00:56,466

the camera power supply will first provide power for the super-wide-angle camera,

14

00:00:57,133 --> 00:01:00,533

and at the same time control the camera power supply conversion tube

15

00:01:00,533 --> 00:01:02,900

to provide other power supplies for the camera

16

00:01:03,933 --> 00:01:07,233

Step 5, after the power supply output is completed,

17

00:01:07,266 --> 00:01:10,266

the camera power supply sends an open signal to the camera

18

00:01:12,033 --> 00:01:17,333

At this time, the working conditions of the camera are basically satisfied and can work normally

19

00:01:17,700 --> 00:01:21,933

After entering the system, the CPU will control the power supply of the camera

20

00:01:21,933 --> 00:01:24,666

to turn off all the working conditions of the camera

21

00:01:25,000 --> 00:01:28,100

The advantage of this design is that it can save power

22

00:01:28,300 --> 00:01:31,200

Step 6, when we open the camera APP,

23

00:01:31,600 --> 00:01:34,133

the CPU will control the camera power supply,

24

00:01:34,333 --> 00:01:37,833

and let the camera power supply send the working conditions of the camera

25

00:01:39,433 --> 00:01:44,266

After the camera has working conditions, it starts to collect image information

26

00:01:44,933 --> 00:01:50,333

The camera will send the collected image information to the CPU through the LPDP bus

27

00:01:51,100 --> 00:01:56,100

After the CPU receives the data, it will display the information on the screen

28

00:01:57,233 --> 00:01:58,966

When we click the camera button,

29

00:01:59,433 --> 00:02:02,966

the CPU will intercept the current LPDP bus data

30

00:02:03,200 --> 00:02:06,833

and transfer it to the hard disk to complete the camera function

31

00:02:08,966 --> 00:02:11,300

When we click the recording function,

32

00:02:12,400 --> 00:02:17,166

the CPU will continuously transfer the LPDP bus data to the hard disk

33

00:02:17,666 --> 00:02:22,300

When we press stop, the CPU no longer collects LPDP bus data,

34

00:02:22,566 --> 00:02:24,800

and the video recording is completed

35

00:02:25,166 --> 00:02:27,000

In the functional block diagram,

36

00:02:27,166 --> 00:02:30,866

AUX is the data monitoring signal from the CPU to the camera,

37

00:02:31,033 --> 00:02:33,933

mainly used to detect LPDP bus data

38

00:02:34,533 --> 00:02:39,666

SYNC is the synchronization signal from the wide-angle camera to the super-wide-angle camera

39

00:02:39,966 --> 00:02:43,566

Because when taking pictures, we can switch the magnification,

40

00:02:43,733 --> 00:02:47,000

using different magnifications will use different cameras

41

00:02:47,133 --> 00:02:49,833

With the synchronization signal, when we zoom in,

42

00:02:49,966 --> 00:02:51,900

we can switch the camera seamlessly

43

00:02:52,366 --> 00:02:55,033

If there is a problem with the synchronization signal,

44

00:02:55,266 --> 00:02:59,066

it will cause a black screen or freeze after switching the screen

45

00:02:59,566 --> 00:03:04,133

If one of the working conditions is abnormal, the camera cannot be turned on

46

00:03:04,733 --> 00:03:06,566

That's all for this video