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Sometimes there is no maintenance for WiFi signal of iPhone6 Plus
Machine model: iPhone 6 Plus
Fault phenomenon: sometimes there is no WiFi signal
Maintenance process: WiFi can be turned on, connect WiFi to watch video, test for about 10 minutes,or so machine suddenly restart, WiFi icon turns gray, disassemble the machine found WiFi chip has been changed.
Sometimes there is no maintenance for WiFi signal of iPhone6 Plus Figure 1.
The WiFi is still gray after switching on a new one. Remove the chip and test that PAD and diode value are normal.VCC is OK and CLK is not correct.
Sometimes there is no maintenance for WiFi signal of iPhone 6 Plus Figure 2.
There is no VCC on the CLK test point. After the WiFi is removed from the normal motherboard, there is 0.9V VCC.WiFi CLK signal is directly provided by PMU. It seems that there is something wrong with PMU, so change it decisively.
The VCC is normal after power on test. There is no problem when the chip is installed. The fault is repaired.
Sometimes there is no maintenance for WiFi signal of iPhone6 Plus Figure Figure 3.
