iPhone 6 Plus Won’t Turn On repair

iPhone 6 Plus Won’t Turn On repair

Machine model: iPhone 6 Plus
Fault symptom: Press the power-on key large current 600-650, mobile phone Won’t Turn On.
Fault analysis: This machine is touch-fixed, and the screen flashes white bars. After a repair, m1 Jump wire will be no booting. It is suspected that it was where BCM5976C1 was blown and welded, or BCM5976C1 Short circuit.
Maintenance process: After dismantling BCM5976C1, turn on the power and touch the position of high temperature,AUDIO CODEC IC high temperature. At this time, we took a detour and directly dismantled AUDIO CODEC IC. Power-on is still 650ma, and it will be killed in Keeps Shaking tone search. Here, I advise my peers that the so-called killing in Keeps Shaking tone can only be used for reference. It is best not to use Keeps Shaking tone to kill without other auxiliary evidence. Here,Keeps Shaking will kill, saying high temperature Capacitor next to CPU, just pry one.After dismantling shielding cover, it was found that Short circuit was true, but it still didn’t work after dismantling. The power-on was still 650ma, and it took a detour. Let’s look at the board carefully. After the phone is powered on, it is still for ten minutes. The large current of 650ma, there is no reason to find out the position of high temperature. It takes a little longer, and the WiFi is very hot. It seems that it may be the biggest here, and the current is all right after the WiFi is pried.

iPhone 6 Plus Won’t Turn On repair Figure 1.

iPhone 6 Plus Won’t Turn On repair Figure 2.

Xunwei full-time technical supplement:VCC GPU VCC, the core of Capacitor CPU next to CPU, filters Capacitor, and the ground value itself is very low. It is not Short circuit that makes VCC sound. Pay attention to the value displayed by VCC.

iPhone 6 Plus Won’t Turn On repair Figure 3.

Failure analysis: This 6P board is not the most rubbish umt, but the motherboard of ats. The motherboard Previously repaired of umt is mostly Inveracious Soldering near the touch and display interface BTB connector. The motherboard of ATS generally does not need to consider this problem. However, the board encountered in this repair used a low-temperature WiFi module, and the high-temperature adhesive tape Current protection was not used in the first repair of BCM5976C1, resulting in low-temperature WiFi damage.large current 650ma motherboard.