IPhone 6 has call failure. Especially during charging, the signal disappears
suddenly and the iPhone fails to call even with signal.
Repair Process
This kind of trouble is caused by two ways. One is the RF power supply Chip and U5411_RF. The sudden change of signal during charging is caused by the damage of U5411_RF or the working condition is not qualified. The material object of U5411_RF is shown in picture .
First measure the diode data between the two power supply pins of U5411_RF and backlight diode of the RFFE bus. The measure location is shown in picture .
When the probe of multimeter touch the L5408_RF inductance，the inductance becomes askew and becomes black at the ends of it, as shown in picture .
Pull out the inductance and connect it with tin. Turn on iPhone and plug the charger into, the signal and dialing become normal after testing. The trouble is removed.
suddenly and the iPhone fails to call even with signal.
Repair Process
This kind of trouble is caused by two ways. One is the RF power supply Chip and U5411_RF. The sudden change of signal during charging is caused by the damage of U5411_RF or the working condition is not qualified. The material object of U5411_RF is shown in picture .
First measure the diode data between the two power supply pins of U5411_RF and backlight diode of the RFFE bus. The measure location is shown in picture .
When the probe of multimeter touch the L5408_RF inductance，the inductance becomes askew and becomes black at the ends of it, as shown in picture .
Pull out the inductance and connect it with tin. Turn on iPhone and plug the charger into, the signal and dialing become normal after testing. The trouble is removed.
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