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iPhone 12 Pro can’t hear the other party’s voice when calling.
Machine model: iPhone 12 Pro
Fault phenomenon: The customer describes that when making a voice call to a friend, the receiver can’t hear the other person’s voice, but the friend can hear his own voice, and he can hear the other person’s voice when he turns on the speakerphone.
iPhone 12 Pro can’t hear the other party’s voice when calling Figure 1.
Maintenance process: After receiving the customer’s mobile phone, according to the customer’s description and own maintenance experience, it can basically be judged that the receiver is broken. Make sure the guess is correct, and directly use the DC regulated power supply to apply 1V voltage to the receiver to measure whether the receiver is damaged. When the receiver is powered on for testing, the sound from the receiver can’t be heard. If the receiver is damaged, just replace it.
iPhone 12 Pro can’t hear the other party’s voice when calling Figure 2.
Start the test, make a phone call, the receiver functions normally, the fault is perfectly repaired, and the maintenance is over.
