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iPhone 6s enters the system slow repair
Machine model: iPhone 6s
Fault phenomenon: card Stuck on Apple logo enters the system slowly
iPhone 6s enters the system slow repair Figure 1.
Maintenance process: cause of battery, system, WiFi,coder.After the battery was replaced, the main page was brushed, and then the appearance was observed without obvious traces of falling. After removing the main board, the starting current was measured with DC power supply, and there was no short-circuit current phenomenon. However, the starting current was always more than 100 and more than 200, so the cycle of current of change was achieved.
iPhone 6s enters the system slow repair Figure 2.
iPhone 6s enters the system slow repair Figure 3.
The normal current will jump to 1a backward system. After observing the motherboard, it is found that there are wrinkles on the back of the skin, and there are obvious traces of falling, and it is in coder.
iPhone 6s enters the system slow repair Figure 4.
Take down AUDIO CODEC IC u3500, start up to measure the current, the current is obviously normal, and put 1A into the system.
iPhone 6s enters the system slow repair Figure 5.
iPhone 6s enters the system slow repair Figure 6.
Replace the u3500, troubleshooting, repair is completed.
iPhone 6s enters the system slow repair Figure 7.
