1
00:00:00,433 --> 00:00:02,333
iPhone Wi-Fi circuit repairing
2
00:00:03,433 --> 00:00:10,366
This video mainly explains how to find the 2.4G and 5G signal lines of iPhone 11 Pro and Pro Max Wi-Fi circuit
3
00:00:14,866 --> 00:00:18,933
Step 1. find the Wi-Fi location number in the component map
4
00:00:20,666 --> 00:00:25,033
Step 2, search for the Wi-Fi location number in the schematic diagram
5
00:00:26,300 --> 00:00:30,700
Step 3, find the corresponding antenna pin in the schematic diagram
6
00:00:33,066 --> 00:00:37,600
Step 4, search for the pin identification in the schematic diagram,
7
00:00:38,533 --> 00:00:43,266
find the connected components, and finally find the antenna screw post
8
00:00:44,966 --> 00:00:52,300
When checking the maps, first open the component map, circuit diagram, and bitmap of iPhone 11 Pro and Promax
9
00:00:52,966 --> 00:00:55,900
Find the Wi-Fi location number in the component map
10
00:00:58,100 --> 00:01:01,700
Then search for the Wi-Fi location number in the schematic diagram
11
00:01:02,800 --> 00:01:06,566
After finding the Wi-Fi chip, find the corresponding signals
12
00:01:08,333 --> 00:01:14,266
In the functional block diagram, TX_5G_C0 represents 5G upper antenna transmission
13
00:01:15,000 --> 00:01:18,766
RX_5G_C0 represents 5G upper antenna receiving
14
00:01:19,366 --> 00:01:23,966
TX/ RX_5G_C1 represents Wi-Fi 5G lower antenna
15
00:01:24,366 --> 00:01:28,300
2G_ANT_C0 represents 2.4G upper antenna
16
00:01:29,000 --> 00:01:33,433
2G_ANT_C1 represents 2.4G lower antenna
17
00:01:34,033 --> 00:01:37,266
The Wi-Fi signal is mainly received by the upper antenna,
18
00:01:37,400 --> 00:01:40,266
and the lower antenna is only an auxiliary function
19
00:01:42,233 --> 00:01:47,533
If the Wi-Fi has a weak signal problem, we only need to find the upper antenna line
20
00:01:49,633 --> 00:01:52,500
Let's first find the 2.4G upper antenna
21
00:01:53,700 --> 00:01:59,300
In the schematic diagram, pin 64 of the Wi-Fi chip is the 2.4G upper antenna
22
00:02:00,000 --> 00:02:05,833
After the line comes out of the Wi-Fi chip, it is connected to the resistor R237_W
23
00:02:06,500 --> 00:02:10,833
After passing through the resistor, we search for the signal at the back end
24
00:02:12,966 --> 00:02:18,800
and after passing through the resistor, the signal is connected to the resistor R2320_K
25
00:02:19,266 --> 00:02:22,600
It connects to FLANT4_K after the resistor
26
00:02:24,433 --> 00:02:26,266
The chip is an antenna switch,
27
00:02:27,133 --> 00:02:30,300
and pins 7 and 10 are signals that need an antenna
28
00:02:30,966 --> 00:02:33,533
and the 4th pin is the antenna pin, ANT
29
00:02:34,600 --> 00:02:39,233
So when looking for signals, we need to continue to look down from the ANT pin
30
00:02:39,900 --> 00:02:45,366
After pin 4 comes out, it is connected to the inductor L2306_K
31
00:02:45,833 --> 00:02:49,433
After passing through the inductor, search for the back-end name
32
00:02:51,166 --> 00:02:57,466
In the schematic diagram, the box that does not identify the coordinates of the pin is the signal conversion box,
33
00:02:57,700 --> 00:02:59,333
we do not need to check
34
00:03:04,466 --> 00:03:08,733
After searching, the signal is connected to pin 22 of JUAT
35
00:03:09,566 --> 00:03:11,466
Jump to the bitmap according to the name,
36
00:03:11,966 --> 00:03:16,366
after determining the position of JUAT in the bitmap, we look at the component map
37
00:03:18,000 --> 00:03:20,833
In the component map, JUAT is the upper antenna
38
00:03:22,766 --> 00:03:28,666
In this way, we have searched for all the components connected to the line of the 2.4G upper antenna
39
00:03:29,700 --> 00:03:32,233
If the Wi-Fi 2.4G signal is weak,
40
00:03:32,400 --> 00:03:37,000
we can directly fly a wire to the 2.4G upper antenna pin of the Wi-Fi chip
41
00:03:37,533 --> 00:03:42,900
If the Wi-Fi signal is still poor after flying the wire, it means that the Wi-Fi chip is damaged
42
00:03:43,133 --> 00:03:45,000
Ok, that's all for this video
