1

00:00:01,000 --> 00:00:02,633

iPhone trigger circuit

2

00:00:03,000 --> 00:00:06,933

In this lesson, we will learn about the no trigger maintenance process

3

00:00:09,433 --> 00:00:11,600

No trigger maintenance process 3

4

00:00:12,166 --> 00:00:16,233

After we eliminate short circuit or broken wire of the switch pin,

5

00:00:16,600 --> 00:00:21,733

we need to measure whether the standby power supply of PP1V8_ALWAYS is normal

6

00:00:22,033 --> 00:00:26,166

When the voltage is not normal, it will result in no power on

7

00:00:27,100 --> 00:00:31,700

For iPhone 7 and higher models, the repair method is the same

8

00:00:32,166 --> 00:00:34,833

Let's take the iPhone XS as an example

9

00:00:35,800 --> 00:00:38,566

We first look for standby power supply in the bitmap

10

00:00:42,566 --> 00:00:45,666

When we find the standby power, we'll measure it

11

00:00:46,433 --> 00:00:49,366

First, we buckle the power cord to the mainboard

12

00:00:49,600 --> 00:00:52,866

Then, we turn the mainboard to measure the standby power supply

13

00:00:54,000 --> 00:00:57,000

Black pen to ground, red pen to measure

14

00:00:57,400 --> 00:01:01,600

At this point, we can see that the voltage is about 1.8V

15

00:01:02,233 --> 00:01:07,133

If the measured voltage is low, replace the standby filter capacitor first

16

00:01:08,033 --> 00:01:10,066

After replacing the capacitor,

17

00:01:10,400 --> 00:01:14,266

if the voltage is not normal, it needs to replace the power IC

18

00:01:14,800 --> 00:01:16,800

So that's it for this lesson