Apple Mobile has attracted a large number of users to buy Apple phones because of its excellent user experience. With the increase of the number of Apple mobile users, we find that there are inevitable similar failures.Below I'll show some of the failures and his solutions
Trouble phenomenon
WiFi can be turned on, but the signal is weak. It has no signal when being away from the router.
Repair Process
After power on test only one or two WiFi hotspot can be found and the signal is weak, but trouble-free iPhone can search more than ten hotspots. Therefore, the trouble can be considered as weak signal.
After disassembling, the WiFi chip is found to be replaced. In order to test whether the chip is workable, using an accessory antenna to replace the peripheral antenna circuit of the chip. The way is to use a 10 cm enameled jump wire acting as antenna starting from C5213_RF near WiFi, as shown in below picture 1-1.
Picture 1-1
Turning on iPhone again after finish the above steps, many WiFi hotspots can be found now. At the same time, the signal has been normal. This is mainly because the WiFi signal filter FL_CELL_WIF_RF has been damaged. But the removal of filter has no effect on the iPhone operation. In the case of repair, we often use the enameled wire directly ignoring the filter chip .
As is shown in the PBC picture 1-2.
picture 1-2
The material object picture of placing the enameled jump wire is shown inpicture 1-3.
After smearing the enameled wire with UV Solder Resist and assembling test, the signal becomes normal. The trouble is removed.
picture 1-3
If you need more useful phone fix information please contact vipfixphone.
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