How to repair iPhone SE short circuit and restart failure
Have you ever encountered a short circuit in your phone? Our customer delivered an iPhone SE to us. The fault described is a short circuit in the phone and cannot be restarted. How to solve it?
First, we took off the motherboard and felt the hot spot by hand. However, the position of the heating element is not obvious.
Apply some rosin to the motherboard and reconnect the DC power supply. We still can't find the faulty part. The circuit is switched from the battery to the main power source through the conversion tube Q2300.
Remove the Q2300 and measure the grounding resistance with the Fluke multimeter to see if there is a short circuit in the battery or the main supply. It is found that there is a short circuit in the main power supply connecting component by value evaluation.
Rosin some rosin on the main power supply connecting component again. The C2331 melts instantly when the single circuit is energized.
It seems that the fault point is here, so we remove the capacitor C2331 by QUICK hot air station and measure the resistance again, the resistance value is normal now, re-install the Q2300 and power-on trigger the iPhone, it can reboot normally.
If you need any mobile phone repair tools, please visit www.vipfixphone.com.
First, we took off the motherboard and felt the hot spot by hand. However, the position of the heating element is not obvious.
Apply some rosin to the motherboard and reconnect the DC power supply. We still can't find the faulty part. The circuit is switched from the battery to the main power source through the conversion tube Q2300.
Remove the Q2300 and measure the grounding resistance with the Fluke multimeter to see if there is a short circuit in the battery or the main supply. It is found that there is a short circuit in the main power supply connecting component by value evaluation.
Rosin some rosin on the main power supply connecting component again. The C2331 melts instantly when the single circuit is energized.
It seems that the fault point is here, so we remove the capacitor C2331 by QUICK hot air station and measure the resistance again, the resistance value is normal now, re-install the Q2300 and power-on trigger the iPhone, it can reboot normally.
If you need any mobile phone repair tools, please visit www.vipfixphone.com.
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