The iPhone X speaker doesn't work after dropping, how to fix it? After checking, we confirmed the iPhone X speaker is damaged by dropping, now we need to fix it.
Test the iPhone X, when we click a ringtone, there is no voice from the bottom speaker. We insert the earpiece, we can hear the voice in earpiece mode.
Based on our experience, the iPhone audio circuit is normal, but the bottom speaker is not working, we need to disassemble the iPhone X again.
Use phone opening tools to disassemble the iPhone X, carefully remove the iPhone X display screen, disconnect the iPhone battery, and then disconnect the iPhone X tail plug flex cable.
Use digital multimeter to measure the socket of the iPhone tail plug flex cable, the data tested is normal, which means the bottom speaker is working properly. Measure the iPhone motherboard connector, after measuring, we found there is circuit line of the one pin is open circuit.
Login to ZXW online account to check iPhone X schematic diagram, we know that this pin is connected to the second pin of the iPhone ringtone amplifier IC through by the middle layer pin S162 of the iPhone X motherboard. So, we need to check this circuit carefully.
Carefully take out the iPhone motherboard, apply it to the iPhone X fixture holder, and then use QUICK 861DW hot air rework station to remove the upper layer.
Observe the upper layer under the Stereo Zoom Microscope, we find that there are many pins are missing on the upper layer, which including S156 pin of the NFC circuit.
According to our repair experience, we think it's because the iPhone was dropped and then it caused virtual welding and pins missing on the iPhone motherboard.
Remove tins on the solder pad and upper layer, clean the iPhone motherboard. Use digital multimeter to measure the diode data of the S162 pin and S163 pin, the data tested are normal.
Now, we know that the open circuited is caused by the virtual welding of the middle layer.
Soldering a jumper wire on the S166 pin, apply some green UV oil to it, and then use UV light lamp to solidify it. Next reball the tin on the lower layer.
At last, assemble the iPhone X, and turn on the iPhone X to test it, the speaker function works properly. The problem has been fixed!
Test the iPhone X, when we click a ringtone, there is no voice from the bottom speaker. We insert the earpiece, we can hear the voice in earpiece mode.
Based on our experience, the iPhone audio circuit is normal, but the bottom speaker is not working, we need to disassemble the iPhone X again.
Use phone opening tools to disassemble the iPhone X, carefully remove the iPhone X display screen, disconnect the iPhone battery, and then disconnect the iPhone X tail plug flex cable.
Use digital multimeter to measure the socket of the iPhone tail plug flex cable, the data tested is normal, which means the bottom speaker is working properly. Measure the iPhone motherboard connector, after measuring, we found there is circuit line of the one pin is open circuit.
Login to ZXW online account to check iPhone X schematic diagram, we know that this pin is connected to the second pin of the iPhone ringtone amplifier IC through by the middle layer pin S162 of the iPhone X motherboard. So, we need to check this circuit carefully.
Carefully take out the iPhone motherboard, apply it to the iPhone X fixture holder, and then use QUICK 861DW hot air rework station to remove the upper layer.
Observe the upper layer under the Stereo Zoom Microscope, we find that there are many pins are missing on the upper layer, which including S156 pin of the NFC circuit.
According to our repair experience, we think it's because the iPhone was dropped and then it caused virtual welding and pins missing on the iPhone motherboard.
Remove tins on the solder pad and upper layer, clean the iPhone motherboard. Use digital multimeter to measure the diode data of the S162 pin and S163 pin, the data tested are normal.
Now, we know that the open circuited is caused by the virtual welding of the middle layer.
Soldering a jumper wire on the S166 pin, apply some green UV oil to it, and then use UV light lamp to solidify it. Next reball the tin on the lower layer.
At last, assemble the iPhone X, and turn on the iPhone X to test it, the speaker function works properly. The problem has been fixed!
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