iPhone 7 Plus the Siri is not serviceable for repaired

Machine model: iPhone 7 Plus

Malfunction: Siri can’t be used, the recording device can’t be found, and call hands-free gray.
Maintenance process:iPhone 7 Plus has an common failing, that is,pad break off and Inveracious Soldering are easy after the pin bit at the bottom of AUDIO CODEC IC chip falls. Several faults of this machine are related to AUDIO CODEC IC chip, which can basically be directly judged as the problem of AUDIO CODEC IC chip.

iPhone 7 Plus the Siri is not serviceable for repaired Figure 1.

iPhone 7 Plus the Siri is not serviceable for repaired Figure 2.
Remove the AUDIO CODEC IC chip directly by 450-degree quick disassembly. After cleaning PAD, it is found that there is no pad break off.

iPhone 7 Plus the Siri is not serviceable for repaired Figure 3.

It should be AUDIO CODEC IC chip Inveracious Soldering or its own damage. Try to put back the chip Reballing, and the tester found that all functions were normal.