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iPhone 12 Pro Max Won’t Turn On repair
Machine model: iPhone 12 Pro Max
Fault phenomenon:Short circuit mobile phone Won’t Turn On
Maintenance process:
iPhone 12 Pro Max mobile phone Won’t Turn On, after dismantling the machine, it is found that the main board fault is Short circuit at the first end, and then through Boardview to find the place where the first end leads to. First, it leads to the charging chip. After the charging chip shielding cover is removed, the Colophony (Solder)is powered on with 4V, and then the separate is powered on the main board again. It is found that Short circuit is no longer found. Then Short circuit is on the lower layer.
iPhone 12 Pro Max Won’t Turn On repair Figure 1.
Use multimeter to hit diode value, first find Short circuit Capacitor, then use Boardview to find the place where Short circuit Capacitor leads, smoke Short circuit, power Short circuit Capacitor with 4v, and find that Capacitor melts.
iPhone 12 Pro Max Won’t Turn On repair Figure 2.
iPhone 12 Pro Max Won’t Turn On repair figure 3.
iPhone 12 Pro Max Won’t Turn On repair figure 4.
After deducting auto power off capacity,Normally boot. At this point,iPhone 12 Pro MAX mobile phone Won’t Turn On fault repair.
iPhone 12 Pro Max Won’t Turn On repair figure 5.
