We received an iPhone 6 Plus from our customer, the fault described is that the iPhone WIFI function is not working, because the iPhone WIFI button is grayed. This iPhone was repaired once, but not well, now we are going to repair it.
After weceived the iPhone, first we try some softeare solutions ( restart, reset network setting and so on), it doesn't make any sense.
Use phone opening tools to disassemble the iPhone 6 Plus, and tthen take out the iPhone motherboard, we found the iPhone WIFI IC is not installed, and there are a
lot of solder points fallen off.
Check
the WUXINJI bitmap and find out the 32K clock
signal pin of WiFi is lost. Bluetooth synchronization control, clock and so on,
Bluetooth foot position directly through the iPhone CPU.
Pry the pin and solder the jumper wire, apply some green UV oil. Welding the
original WIFI and turn on the iPhone to test, it's gray WIFI too, and the
iPhone also stuck. After we replace a new one, the fault is still same.
Disassemble the iPhone again, we suspect the iPhone WIFI IC didn't installed well, heat it by QUICK 861DW hot air rework station, and then use tweezers to press the iPhone WIFI module IC.
Assemble the iPhone, get into IOS to test the WIFI function, it works well.
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