IPhone 6 has a weak signal and cannot connect to Wi-Fi. Even if connected to Wi-Fi, it cannot surf the Internet. The Wi-Fi chip has been replaced.
Repair Process
After power on and test, signal cannot be searched with Wi-Fi switched on. After teardown the iphone by new Screwdriver opening tool Set , we find the connection between the iron sheet and the Wi-Fi antenna is not doing well, as shown in picture 1-24.
Picture 1-24
Wi-Fi signal can be searched with the well connection between the iron sheet and the Wi-Fi antenna swith . But the Wi-Fi signal is not stable because customer has already replaced the Wi-Fi chip . First excluding the problems caused by Wi-Fi chip, we mainly measure Wi-Fi signal reception circuit.
After measuring, we know capacitance C5133_RF is short circuit. The location of C5133_RF is shown in picture 1-25 and in material object picture 1-26.
Picture 1-25
Picture 1-26
After replacing a new capa citance, turn on iPhone and test. The Wi-Fi signal keeps stable. The trouble is removed.
Repair Process
After power on and test, signal cannot be searched with Wi-Fi switched on. After teardown the iphone by new Screwdriver opening tool Set , we find the connection between the iron sheet and the Wi-Fi antenna is not doing well, as shown in picture 1-24.
Picture 1-24
Wi-Fi signal can be searched with the well connection between the iron sheet and the Wi-Fi antenna swith . But the Wi-Fi signal is not stable because customer has already replaced the Wi-Fi chip . First excluding the problems caused by Wi-Fi chip, we mainly measure Wi-Fi signal reception circuit.
After measuring, we know capacitance C5133_RF is short circuit. The location of C5133_RF is shown in picture 1-25 and in material object picture 1-26.
Picture 1-25
Picture 1-26
After replacing a new capa citance, turn on iPhone and test. The Wi-Fi signal keeps stable. The trouble is removed.
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