Got the repaired iPhone 6, we need to confirm the faults.
From the first scene, there no physical damage and no other outside faults, Wi-Fi function also runs normal. So we have to check the inside.
Use phone opening tools to disassemble the iPhone 6, connect iPhone logic board to the DPS DC power supply to measure its current, the current tested is normal.
Press the iPhone power button to turn on iPhone, get into IOS to check iPhone signal. After measurement, the signal is abnormal, it's very weak.
According to the previously repair experience, there is an inductance L4608 powered by B+ to the iPhone antenna switch, we can open WUXINJI Dongle to check iPhone schematic diagram to find it.
Picture 1
After find out the problem, we need to short connect L4608. Put iPhone logic board under the Stereo Zoom Microscope, use QUICK 861DW hot air rework station to solder a jumper wire on L4608.
Picture 2
Install the iPhone and test it, the iPhone signal is back to normal，now the iPhone signal is full and strong.
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