iPhone X silent fault repair

Machine model: iPhone X
Malfunction: earpiece is silent and screen Glass is broken.
Maintenance process:
First of all, the fault point:earpiece is silent, which is the essence of the fault. So what is the cause of the failure? The customer description is clearly written.screen Glass is broken. According to this, let’s reorganize the language. becausemobileFall hard, causing the screen screen Glass to shatter, resulting in the failure of playing earpiece silently.

iPhone X silent fault repair Figure 1.

The first step in the case of fast maintenance machine is to eliminate Accessories. After replacing earpiece, it is found that the fault is still the same, so the fault must be on the motherboard.
The second step of the repair machine case is to open our repair artifact Xinzhizao Soft and find the component labeling drawing of our Apple X.

iPhone X silent fault repair Figure 2.

We found the BTB connector sub-child related to earpiece in the upper A plane, and measured the pin bit of BTB connector.

iPhone X silent fault repair Figure 3.

Measurement shows that the chip diode value OverLoad from earpiece BTB connector to earpiece earpiece, that is, the line is disconnected. Because the machine is faulty due to Fall hard, and Apple X is a double-layer motherboard, it is suspected that Fall hard caused the solder joints between the upper and middle frames Fall hard or power amplifier. We need to separate the upper layer, and then measure BTB connector to the middle frame again.Frame the circuit to power amplifier chip, and make sure the circuits at both ends are normal.
At this point, the maintenance idea of this case is suddenly enlightened. We only need to patch the solder joints of Inveracious Soldering pad break off Repeat welding, and the welding motherboard will be repaired perfectly.

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